ISU 2x64
Dual Port ISDN Service Unit
User Manual
Part Numbers
1200051L1
1200051L2
1200051L5
1200051L6
U-Interface Version, 110 VAC
S/T-Interface Version, 110 VAC
S/T-Interface International, 110 VAC
S/T-Interface International, 230 VAC
61200051L1-1D
June 1998
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FCC regulations require that the following information be provided in this manual:
1. This equipment complies with Part 68 of the FCC rules. On
the bottom of the equipment housing is a label that shows the
FCC registration number and Ringer Equivalence Number
(REN) for this equipment. If requested, provide this informa-
tion to the telephone company.
2. If this equipment causes harm to the telephone network, the
telephone company may temporarily discontinue service. If
possible, advance notification is given, otherwise, notification is
given as soon as possible. The telephone company will advise
the customer of the right to file a complaint with the FCC.
3. The telephone company may make changes in its facilities,
equipment, operations, or procedures that could affect the
proper operation of this equipment; advance notification and
the opportunity to maintain uninterrupted service is given.
4. If experiencing difficulty with this equipment, please contact
ADTRAN for repair and warranty information. The tele-
phone company may require this equipment to be discon-
nected from the network until the problem is corrected, or it
is certain the equipment is not malfunctioning.
5. This unit contains no user serviceable parts.
6. An FCC compliant telephone cord with a modular plug is pro-
vided with this equipment. In addition, an FCC compliant ca-
ble appropriate for the dial backup option ordered is provided
with this equipment. This equipment is designed to be connect-
ed to the telephone network or premises wiring using an FCC
compatible modular jack, which is Part 68 compliant.
7. The following information may be required when applying
to the local telephone company for leased line facilities.
Service Type
Digital Facility
Interface Code
Service Order Code
Network Jacks
ISDN
02IS5
6.0F
RJ-49C
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FEDERAL COMMUNICATIONS COMMISSION
RADIO FREQUENCY INTERFERENCE STATEMENT
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of
the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the
equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to
radio frequencies. Operation of this equipment in a residential area is likely to cause harmful interference in which
case the user will be required to correct the interference at his own expense.
Shielded cables must be used with this unit to ensure compliance with Class A FCC limits.
Changes or modifications to this unit not expressly approved by the party responsible
for compliance could void the user's authority to operate the equipment.
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CANADIAN EMISSIONS REQUIREMENTS
This digital apparatus does not exceed the Class A limits for radio noise emissions from digital
apparatus as set out in the interference-causing equipment standard entitled "Digital Appara-
tus," ICES-003 of the Department of Communications.
Cet appareil numerique respecte les limites de bruits radioelectriques applicables aux appareils
numeriques de Class A prescrites dans la norme sur le materiel brouilleur: "Appareils Numer-
iques," NMB-003 edictee par le ministre des Communications.
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CANADIAN EQUIPMENT LIMITATIONS
Notice: The Canadian Industry and Science Canada label identifies certified equipment. This
certification means that the equipment meets certain telecommunications network protective,
operational, and safety requirements. The Department does not guarantee the equipment will
operate to the user’s satisfaction.
Before installing this equipment, ensure that it is permissible to be connected to the facilities
of the local telecommunications company. The equipment must also be installed using an
acceptable method of connection. In some cases, the company’s inside wiring associated with
a single-line individual service may be extended by means of a certified connector assembly
(telephone extension cord). Compliance with the above conditions may not prevent degrada-
tion of service in some situations.
Repairs to certified equipment should be made by an authorized Canadian maintenance facility
designated by the supplier. Any repairs or alterations made by the user to this equipment, or
equipment malfunctions, may give the telecommunications company cause to request the user
to disconnect the equipment.
Users should ensure for their own protection that the electrical ground connections of the
power utility, telephone lines, and internal metallic water pipe system, if present, are connected
together. This precaution may be particularly important in rural areas.
Users should not attempt to make such connections themselves, but should
contact the appropriate electric inspection authority, or an electrician, as
appropriate.
The Load Number (LN) assigned to each terminal device denotes the percentage of the total
load to be connected to a telephone loop which is used by the device, to prevent overloading.
The termination on a loop may consist of any combination of devices subject only to the
requirement that the total of the Load Numbers of all devices does not exceed 100.
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Table of Contents
Chapter 1. Understanding ISDN and the ISU 2x64...................................................... 1
ISDN Overview ..................................................................................................................... 1
The ADTRAN ISU 2x64........................................................................................................ 1
ISU 2x64 Interoperability ..................................................................................................... 4
ISU 2x64 Single Port Operation........................................................................................... 4
Recommended Operating Protocols................................................................................... 6
Chapter 2. ISDN Service.................................................................................................... 9
ISDN Ordering Codes .......................................................................................................... 9
Chapter 3. Installation...................................................................................................... 13
Network Connection ......................................................................................................... 13
DTE Data Connection......................................................................................................... 14
Maintenance interface......................................................................................................... 15
Dial Interface Connection .................................................................................................. 16
Chapter 4. Operation ........................................................................................................ 17
Menu Navigation ................................................................................................................ 17
Front Panel DTE Indicators .......................................................................................... 18
VT 100 Menu Support ................................................................................................... 19
Getting Started..................................................................................................................... 19
Status Buffer.................................................................................................................... 20
Status Screen................................................................................................................... 21
Configuration Screen..................................................................................................... 22
Chapter 5. Testing ............................................................................................................. 23
Test Options ......................................................................................................................... 23
Loopback DTE................................................................................................................ 24
Loopback Network ........................................................................................................ 24
Loopback Protocol ......................................................................................................... 24
Loopback Remote........................................................................................................... 25
Test Remote..................................................................................................................... 25
Loopback Disable........................................................................................................... 25
NEBE/FEBE.................................................................................................................... 26
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Table of Contents
Software Version ............................................................................................................ 26
Loopback Both DTEs ..................................................................................................... 26
Test 2047 Both................................................................................................................. 26
Chapter 6. Configuration .................................................................................................27
Dial Line Operation............................................................................................................. 27
Setting the Switch Protocol........................................................................................... 28
Setting the Call Type...................................................................................................... 31
Speech..................................................................................................................... 31
Audio ...................................................................................................................... 31
Data 56kbps............................................................................................................ 31
Data 64kbps............................................................................................................ 31
Smart Dial Strings .......................................................................................................... 32
Setting the Terminal ID ................................................................................................. 32
Setting the SPID..................................................................................................... 32
Setting the LDN..................................................................................................... 33
Setting the Busy Out Port.............................................................................................. 33
Enabled................................................................................................................... 34
Disabled.................................................................................................................. 34
Setting the Dial Options ................................................................................................ 34
Front Panel............................................................................................................. 34
RS-366 ..................................................................................................................... 34
AT Commands ...................................................................................................... 36
V.25.......................................................................................................................... 39
Disabled.................................................................................................................. 42
Setting Auto Answer ..................................................................................................... 42
Disabled................................................................................................................. 42
Enabled................................................................................................................... 43
Dump all calls........................................................................................................ 43
Setting Answer Tone...................................................................................................... 43
No Answer tone (Default) ................................................................................... 44
Incoming tone........................................................................................................ 44
Outgoing tone........................................................................................................ 44
Always tone ........................................................................................................... 44
Setting Connect Timout................................................................................................. 45
Setting Call Screening.................................................................................................... 45
SBus Termination ........................................................................................................... 46
Leased Line Service............................................................................................................ 47
Clock Mode: Slave/Master......................................................................................... 47
Channel Rate................................................................................................................... 48
SBus Termination ........................................................................................................... 49
DTE Options for Asynchronous and Synchronous Operation................................ 50
Bit Rate.................................................................................................................... 51
Connector Type..................................................................................................... 51
RTS Options........................................................................................................... 51
CTS Options........................................................................................................... 51
CD Options ............................................................................................................ 51
DTR Options.......................................................................................................... 52
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Table of Contents
DSR Options .......................................................................................................... 52
Flow Control (asynchronous data format)........................................................ 52
Data Format (asynchronous)............................................................................... 53
Transmit Clock (synchronous data format)...................................................... 53
Autobaud ........................................................................................................................ 54
Setting Protocol Options ............................................................................................... 55
Clear Channel........................................................................................................ 56
BONDING mode 1 ............................................................................................... 56
TXINIT............................................................................................................. 57
TXFA................................................................................................................ 57
TXADD01........................................................................................................ 57
TXDEQ ............................................................................................................ 58
TANULL ......................................................................................................... 58
TCID ................................................................................................................ 58
Async. Rev. ..................................................................................................... 58
V.120 ....................................................................................................................... 58
V.110 ....................................................................................................................... 59
DSU 57.6 ASYNC.................................................................................................. 59
T-Link ..................................................................................................................... 59
SAP.......................................................................................................................... 59
FALLBACK............................................................................................................ 60
Point-to-Point (PPP) Async-to-Sync................................................................... 61
Point-to-Point Protocol (PPP) ...................................................................... 62
Multilink PPP ................................................................................................. 62
PPP with Compression ................................................................................. 62
Chapter 7. Dial Options ................................................................................................... 63
Front Panel Dialing Options.............................................................................................. 63
Hang up line ................................................................................................................... 64
Dial number ................................................................................................................... 64
Redial last #.................................................................................................................... 64
Answer Call .................................................................................................................... 64
Dial stored #.................................................................................................................... 64
Store/Review # .............................................................................................................. 64
Chapter 8. Quick Setup.................................................................................................... 65
Quick Setup Configuration................................................................................................ 65
Quick Setup.......................................................................................................................... 66
Dial 56K sync* ....................................................................................................... 66
Dial 64K sync* ....................................................................................................... 67
Dial 112K sync* ..................................................................................................... 67
Dial 128K sync* ..................................................................................................... 68
Dial 57.6 asyn*....................................................................................................... 68
Dial 115.2 asyn*..................................................................................................... 69
Fallback 57.6k*....................................................................................................... 69
Leased 64K............................................................................................................. 70
Ldm 64K Master.................................................................................................... 70
Factory Setup......................................................................................................... 71
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Table of Contents
Chapter 9. Security and Remote Configuration ..........................................................73
Security ................................................................................................................................. 73
Set Password................................................................................................................... 74
Lock Keypad ................................................................................................................... 74
Remote Config .................................................................................................................... 74
Cfg. Rmt. Unit................................................................................................................. 75
Set Password................................................................................................................... 75
Lpbk remote 1B............................................................................................................... 75
Lpbk remote 2B............................................................................................................... 75
Chapter 10. Troubleshooting...........................................................................................77
If Self Test Fails.............................................................................................................. 77
If The ISU 2x64 Does Not Read Ready....................................................................... 77
If the Wrong DTE Port Answers a Call....................................................................... 83
If you Cannot Connect Calls......................................................................................... 84
Chapter 11. Specifications
Network Interface.......................................................................................... 85
DTE Interface.................................................................................................. 85
Dialing Selections........................................................................................... 85
Data Rates (Network).................................................................................... 85
Data Rates (DTE)............................................................................................ 86
B Channel Aggregation................................................................................. 86
Rate Adaptation ............................................................................................. 86
Interoperability............................................................................................... 86
Switch Compatibility..................................................................................... 86
Display............................................................................................................. 87
Environmental................................................................................................ 87
Physical............................................................................................................ 87
Power............................................................................................................... 87
Appendix A. AT Commands...........................................................................................89
Appendix B. Current Status Messages..........................................................................95
Appendix C. Status Buffer Messages ............................................................................99
Appendix D. S-Register List..........................................................................................109
Appendix E. Connector Pinouts ...................................................................................119
Appendix F. Ordering ISDN Without IOCs ..............................................................125
Acronyms ...........................................................................................................................135
Glossary..............................................................................................................................137
Index ...................................................................................................................................145
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List of Figures
Figure 1-1:
Figure 1-2:
Figure 1-3:
Figure 3-1:
Figure 4-1:
Figure 4-2:
Figure 4-3:
Figure 5-1:
Figure 5-2:
Figure 5-3:
Figure 6-1:
Figure 6-2:
Figure 6-3:
Figure 6-4:
Figure 6-5:
Figure 6-6:
Figure 6-7:
Figure 6-8:
Figure 6-9:
Figure 6-10:
Figure 6-11:
Figure 6-12:
Figure 6-13:
Figure 6-14:
Figure 6-15:
Figure 6-16:
Figure 6-17:
Figure 6-18:
Figure 6-19:
ISU 2x64 Rear Panel .................................................................................. 2
ISU 2x64 Front Panel................................................................................. 4
ISU 2x64 Interoperability ......................................................................... 5
VT 100 Maintenance Help Screen ......................................................... 15
Current Status Menu............................................................................... 18
VT 100 Status Screen ............................................................................... 21
VT 100 Configuration Screen................................................................. 22
VT 100 Test Menu Screen ....................................................................... 23
Test Menu Tree ........................................................................................ 24
Loopback Points ...................................................................................... 24
Dial Line Menu Tree ............................................................................... 27
VT 100 Configuration Menu Screen ..................................................... 28
LCD Configuration Menu Tree ............................................................. 29
Dial Options, RS-366 Menu Tree........................................................... 35
Dial Options, V.25 bis Menu Tree......................................................... 39
Dial Line, Auto Answer Menu Tree ..................................................... 40
Data Bits Menu Tree................................................................................ 41
V.25 bis ASYNC Menu Tree................................................................... 41
Answer Tone Menu Tree........................................................................ 44
Connect Timout Menu Tree................................................................... 45
Call Screening Menu Tree ...................................................................... 45
SBus Termination Menu Tree................................................................ 46
Leased Line Menu Tree .......................................................................... 47
Limited Distance Modem Applications ............................................... 48
Leased Application with Channel Banks............................................. 48
Asynchronous DTE Options Menu Tree.............................................. 50
Synchronous DTE Options Menu Tree ................................................ 50
Flow Control Menu Tree ........................................................................ 53
Data Format Menu Tree ......................................................................... 53
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List of Figures
Figure 6-20:
Figure 6-21:
Figure 6-22:
Figure 6-23:
Figure 7-1:
Figure 7-2:
Figure 8-1:
Figure 9-1:
Figure 9-2:
Figure E-1:
Figure E-2:
Figure E-3:
Figure E-4:
Figure E-5:
Transmit Clock Menu Tree..................................................................... 54
Protocol Menu Tree................................................................................. 55
Protocol BONDING, Mode 1 Menu Tree............................................. 57
PPP Menu Tree........................................................................................ 61
VT 100 Dial Options Screen.................................................................... 63
Dial Menu Tree ........................................................................................ 63
Quick Setup Menu Tree.......................................................................... 65
Security Menu Tree ................................................................................. 73
Remote Config Menu Tree ..................................................................... 74
EIA-232 Interface ................................................................................... 119
RS-530 Interface..................................................................................... 120
V.35 Interface.......................................................................................... 120
RS-366 Interface...................................................................................... 121
RJ-45 Dial Line Connector U Interface ................................................122
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List of Tables
Table 1-A:
Table 1-B:
Table 6-A:
Table 10-A:
Table E-A:
Table E-B:
Table E-C:
Table E-D:
Table E-E:
Table E-F:
Table E-G:
Table F-A:
Table F-B:
DTE Indicators....................................................................................... 3
Recommended Operating Modes ....................................................... 7
Rate Adaptation Protocols ................................................................... 60
Troubleshooting Calls........................................................................... 84
EIA-232 Interface ................................................................................... 119
RS-530 Interface .................................................................................... 120
V.35 Interface.......................................................................................... 121
RS-366 Interface ..................................................................................... 122
RJ-45 Dial Line Connector U Interface ............................................... 122
RJ-45 Dial Line Connector S/T Interface ........................................... 123
Maintenance Connector........................................................................ 123
5ESS Features ........................................................................................ 131
DMS Features......................................................................................... 132
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List of Tables
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Chapter 1
Understanding ISDN and the ISU 2x64
ISDN OVERVIEW
The Integrated Services Digital Network (ISDN) is a public or pri-
vate switched digital network. ISDN is an international standard
for digital communications, allowing a full range of enhanced ser-
vices supporting voice, data, and image applications through
standard interfaces over a single pair of telephone wires. ISDN
provides a means of integrating these services and modernizing
communication networks for information movement and man-
agement efficiency.
THE ADTRAN ISU 2X64
ADTRAN’s ISU™ 2x64 is a stand-alone ISDN service unit that
connects data terminal equipment to the ISDN network. The ISU
2x64 is a dual-port ISDN terminal adapter available with an op-
tional integrated NT1. The ISU 2x64 supports two applications at
data rates of up to 64 kbps on each DTE interface, or one applica-
tion using a data rate greater than 64 kbps (maximum 128 kbps)
on a single DTE interface. Target applications for the ISU 2x64 in-
clude video conferencing, audio broadcasting, and as dual mo-
dem replacement.
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Chapter 1.Understanding ISDN and the ISU 2x64
The ISU 2x64 features two RS-530/EIA-232 DTE interfaces and
two RS-366 dial interfaces (see Figure 1-1). An RS-530/EIA-232-
to-V.35 adapter is available to support V.35 DTE interfaces. Syn-
chronous data transfer rates from 2400 bps to 128 kbps and asyn-
chronous rates from 1200 bps to 115.2 kbps are supported on a
single DTE interface. Synchronous data transfer rates from 2400
bps to 64 kbps and asynchronous rates from 1200 bps to 57.6 kbps
are supported when using two DTE interfaces. For speeds over 64
kbps using a single DTE interface, the industry standard BOND-
ING protocol aggregates the two 64 kbps B channels for a maxi-
mum of 128 kbps.
Dialing from the ISU 2x64 is accomplished in a variety of ways:
•
•
•
Dialing manually from the front panel
Dialing automatically from stored numbers
Dialing through two RS-366 parallel dial interfaces (as in vid-
eo conferencing applications)
•
•
Dialing over the DTE interfaces using AT command
V.25 bis in-band dialing (used in applications such as LAN/
WAN bridging)
•
Dialing when DTR is asserted (some Bridge/Routers raise
DTR when bandwidth on their dedicated line is exceeded)
ISDN IFC
POWER
DTE#2
RS530A / RS232
DTE#1
RS530A / RS232
ON
OFF
RS366 DIALING PORT
RS366 DIALING PORT
MAINTENANCE
Figure 1-1
ISU 2x64 Rear Panel
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Chapter 1. Understanding ISDN and the ISU 2x64
The ISU 2x64 allows the user to migrate ISDN into existing net-
work services and data communications equipment. The ISU
2x64 interoperates with ISU 128s, Switched 56 DSUs, various
ISDN terminal adapters, and BONDING inverse multiplexers
(for example ASCEND®, PROMPTUS, and Teleos®). For
instance, in a video conferencing application, this compatibility
allows the ISU 2x64 to interoperate with networks utilizing two
Switched 56 DSUs.
The ISU 2x64 front panel accommodates a 2-line by 16-character
LCD display. Seven LED indicators monitor data flow and dis-
play the status of key DTE interface leads (see Table 1-A and Fig-
ure 1-2). A front panel keypad supports configuration, test
modes, test status, and dialing.
Table 1-A
DTE Indicators
Indicator
Definition
RS
Request to Send. Indicates the DTE is ready to
transmit.
CS
TD
RD
CD
TR
Clear to Send. Indicates the ISU 2x64 is ready
to transmit.
Transmit Data. On when the DTE is transmitting
to the ISU 2x64.
Receive Data. On when the ISU 2x64 is receiv-
ing data from the far end.
Carrier Detect. On when the ISU 2x64 is con-
nected to a remote unit.
Data Terminal Ready from DTE. On when DTR is
active at DTE interface.
SR
Data Set Ready.
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Chapter 1.Understanding ISDN and the ISU 2x64
ISU 2X64
1
4
2
5
3
6
ENTER
7
8
0
9
RS CS TD RD CD TR SR
CANCEL
#
*
Figure 1-2
ISU 2x64 Front Panel
ISU 2X64 INTEROPERABILITY
Telephone networks are evolving from analog technologies to
digital technologies such as ISDN. This transition is time-consum-
ing and costly for the telephone companies and upgrading all lo-
cations and facilities is a lengthy process.
The ISU 2x64 bridges this transition by supporting communica-
tions with existing and future network services and equipment.
The ISU 2x64 supports communications with Switched 56 Service
and Switched 56 DSUs (2-wire and 4-wire) as well as various
ISDN terminal adapters, ISDN terminal equipment, and BOND-
ING-compatible Inverse Multiplexers.
Figure 1-3 illustrates the ISU 2x64 operation in various switched
network services and customer premises products.
ISU 2X64 SINGLE PORT OPERATION
The ADTRAN ISU 2x64 is designed to operate over multipoint
ISDN lines in North America that will require two Service Profile
Identification (SPID) numbers from the telephone company when
the ISDN lines are installed. These SPID numbers tell the ADT-
RAN ISU 2x64 which port or DTE# to route incoming and outgo-
ing calls. See Ordering ISDN Without IOCs on page 125 for further
details on ordering multipoint ISDN service.
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Chapter 1. Understanding ISDN and the ISU 2x64
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Chapter 1.Understanding ISDN and the ISU 2x64
When the ISU 2x64 is used on an existing ISDN line that is not
multipoint, with one SPID or no SPID numbers, additional con-
siderations should be addressed. If DTE specific operation is
desired, the ISDN line must be converted to multipoint operation
(2 SPIDS). If not, the following applies:
1. If a single SPID is assigned, it must be entered under SPID
DTE#2.
2. When no calls are active, the first incoming call is always di-
rected to DTE#2.
3. DTE#1only accepts incoming calls when a call is active on
DTE#2.
4. Outgoing calls can be placed without restrictions from either
port.
For applications involving only one SPID being used on a multi-
point line, the SPID assigned must be entered under SPID
DTE#2. For applications involving the S/T version (part number
1200.051L5 and 1200.051L6), no SPID(s) are used when the Euro
ISDN or VN4 switch type is selected. The call will be routed to
the appropriate port based on the directory number entered
under the local directory number (LDN) prompt . See the section
Setting the Terminal ID on page 32 for more detail on entering
SPID numbers.
RECOMMENDED OPERATING PROTOCOLS
The ISU 2x64 supports a wide range of operating modes. Many
combinations of circuit type, protocol, and data rate may be
selected. However, only the combinations shown in Table 1-B are
recommended. As noted in Table 1-B, all asynchronous rates sup-
port flow control. Flow control is required when operating at
115200 bps using V.120, PPP, MLPPP, SAP, or BONDING proto-
cols.
Table 1-B shows that a given data rate may be achieved by more
than one protocol/rate adaptation selection. The table is orga-
nized so that selections with lower throughput delay are nearer
the top of the table for any given circuit type. Therefore, users
should choose a protocol and rate nearer the top of the list for any
given circuit type.
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Chapter 1. Understanding ISDN and the ISU 2x64
Table 1-B
Recommended Operating Modes
Sync/
Async
Call Type
Protocol
Rates Supported (bps)
DIAL-64K
BONDING
Clear Chan
PPP
Sync
56000
48000
2400
64000
56000
4800
Sync
Sync
64000
9600
9600
19200
19200
48000
19200
38400
38400
56000
64000
64000
V.110
Sync
2400
4800
V.120
Sync
9600
19200
4800
38400
9600
Tlink
Sync
2400
56000
SAP
Sync
38400
1200
PPP async-sync
BONDING
V.110
Async
Async
Async
Async
Async
Async
Sync
2400
4800
2400
2400
2400
4800
9600
4800
4800
4800
9600
19200
9600
19200
38400
19200
19200
19200
38400
57600
38400v
38400
57600
57600
115200f
115200f
2400
1200
V.120
1200
9600
Tlink
1200
9600
SAP
38400
56000
48000
2400
57600 115200f
DIAL-56K
BONDING
Clear Chan
PPP
Sync
56000
Sync
4800
4800
19200
4800
2400
4800
9600
9600
38400
9600
4800
9600
19200
19200
48000
19200
9600
38400
56000
V.110
Sync
2400
V.120
Sync
9600
TLINK
Sync
2400
56000
19200
38400
PPP async-sync
BONDING
DSU 57.6
V.110
Async
Async
Async
Async
Async
Async
Sync
1200
38400
57600
57600
57600
115200f
115200f
2400
19200
57600
1200
2400
2400
2400
4800
4800
4800
9600
9600
9600
19200
19200
19200
V.120
1200
38400
Tlink
1200
DIAL-64K*2
DIAL-56K*2
LEASED 64K
BONDING
MPPP
128000
128000
115200
115200
112000
112000
115200
115200
48000
2400
Sync
MPPP
Async
Async
Sync
BONDING
BONDING
MPPP
Sync
MPPP
Async
Async
Sync
BONDING
Clear Chan
SAP
56000
4800
64000
9600
Sync
19200
9600
38400
19200
DSU 57.6
SAP
Async
Async
Sync
57600
1200
2400
4800
38400
57600f
115200f
LEASED 128K Clear Chan
SAP
128000
Async
57600f 115200f
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Chapter 1.Understanding ISDN and the ISU 2x64
1. All asynchronous rates support flow control.
2. All dial-up modes support front panel, DTR, RS-366, AT
command, and V.25 dialing methods.
3. Rates marked with f require flow control.
4. Given a choice between two protocols, pick the protocol closer
to the top of the list.
5. Rate marked with v is available on Port 2 only.
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Chapter 2
ISDN Service
ISDN ORDERING CODES
ISDN is a complex service with many network options. Obtain-
ing service from the local telephone company and long distance
providers can be complicated.
In North America, the development of ISDN ordering codes
(IOCs) simplifies the process of ordering ISDN service. The ISDN
Solutions Group, a consortium of ISDN equipment vendors, ser-
vice providers, and Bellcore, established these codes to represent
predetermined line configurations for ISDN Basic Rate service for
specific applications.
ADTRAN and Bellcore have registered and tested eight generic
IOCs. These IOCs are supported by all major local exchange car-
riers as well as several independent carriers. After reviewing the
following list, order ISDN lines from the local service provider.
Request the appropriate IOC for your application. If the local ser-
vice provider does not support IOCs, see Ordering ISDN Without
IOCs on page 125.
Capability S (previously Generic Data M) ordering code is rec-
ommended for 2x64 applications. It is the most feature-rich and
supports most voice and data applications. The voice capability
is not necessary for ISU operation in 2x64 in data-only applica-
tion, however it is useful in troubleshooting a mis-configured
ISDN line. In some areas, ISDN tariffs may warrant the use of
ordering codes with less features. For example, in a particular
region, there may be additional monthly expense associated with
having voice service on each B channel. If you have a data-only
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Chapter 2.ISDN Service
application, then Capability R (previously Generic Data I) may
be more cost-effective.
ADTRAN has registered the following ISDN ordering codes to
support a variety of tariffs and applications:
Capability S (previously Generic Data M)
•
•
•
2B service
Both B channels alternating voice and data
Two directory numbers
Applications
•
Host data center, internet access, bulletin board, and modem
pooling applications
•
•
Modem capability
Generic data transfer, including remote access and LAN/
WAN connectivity and telecommuting
Capability R (previously Generic Data I)
•
•
•
2B service
Data only
Two directory numbers
Applications
•
Host data center, internet access, bulletin board, and modem
pooling applications
•
•
Data only applications, no modem capability
Data transfer applications, including remote access and
LAN/WAN connectivity, telecommuting
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Chapter 2. ISDN Service
B1 (previously Generic Data B)
•
•
•
1B service
Data only
One directory number
Capability C (previously Generic Data C)
•
•
•
1B service
Alternating voice and data
One directory number
I2 (previously Generic Data I-1DN)
•
•
•
2B service
Data only
One directory number
I2 is not available for services provided by a Northern Telecom switch. Two
directory numbers are required for 2B operation. In this case, use Capabil-
ity R.
J3 (previously Generic Data J-1DN)
•
•
•
2B service
1B alternating voice/data, 1B data only
One directory number
J3 is not available for services provided by a Northern Telecom switch. Two
directory numbers are required for 2B operation. In this case, use J2.
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Chapter 2.ISDN Service
J2 (previously Generic Data J)
•
•
•
2B service
1B alternating voice/data, 1B data only
Two directory numbers
M5 (previously Generic Data M-1DN)
•
•
•
2B Service
1B alternating voice/data, 1B data only
One directory number
M5 is not available for services provided by Northern Telecom or AT&T
switches.
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Chapter 3
Installation
After unpacking the unit, immediately inspect it for possible
shipping damage. If damage is discovered, file a claim immedi-
ately with the shipping carrier, then contact ADTRAN Technical
Support.
Each ISU 2x64 is provided with an eight-foot power cord termi-
nated by a three-prong plug which connects to a grounded power
receptacle.
ADTRAN ISU 2x64 part numbers 1200051L1, 1200051L2, and
1200051L5 require a grounded 115 VAC, 60 Hz receptacle for
power.
ADTRAN ISU 2x64 part numbers 1200051L3, 1200051L4 and
1200051L6 require a 230 VAC, 50 Hz receptacle for power.
NETWORK CONNECTION
An eight-pin RJ-45 modular jack on the rear panel of the ISU 2x64
allows connection to ISDN Basic Rate service provided by the
telephone company or to a leased type of service. This leased ser-
vice can be dedicated 2B1Q data service or a nailed-up circuit that
provides a dedicated connection between end points such as a
limited distance modem or LAD circuit.
If using ISU 2x64, part number 1200051L1 or 1200051L3, connect
the telephone company provided ISDN Basic Rate U-Interface to
the RJ-45 connector marked ISDN IFC. An external NT1 is not
needed in this configuration.
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Chapter 3.Installation
If using ISU 2x64, part number 1200051L2, 1200051L4, 1200051L5,
or 1200051L6, connect an ISDN Basic Rate S/T interface to the RJ-
45 connector marked ISDN IFC. The S/T interface can be pro-
vided from an S/T line card of an ISDN switch or PBX, or from an
NT1 network termination unit.
If using a leased service, connect the network interface to the RJ-
45 connector marked ISDN IFC.
See Connector Pinouts on page 119 for network connection pin
assignments.
DTE DATA CONNECTION
Data terminal equipment (DTE) is connected to the ISU 2x64 by
using the RS-530/EIA-232 interfaces or by using the external RS-
530-to-V.35 adapters (part number 1200072L1). A maximum
cable length of 50 feet is recommended for the RS-530/EIA-232
interfaces. If using the RS-530-to-V.35 adapter and connected to a
full specification V.35 interface, the maximum recommended
cable length is 15 feet. The pin assignments for the DTE inter-
faces are shown in Connector Pinouts on page 119. Be sure to con-
figure the menu option for the connector type used in your
application. See DTE Options for Asynchronous and Synchronous
Operation on page 50.
The RS-530/EIA-232 interface and the RS-530-to-V.35 interface
supports data rates up to 128 kbps. The DTE rate is configured
from the front panel of the ISU 2x64 or by using AT commands.
See Configuration to configure the ISU 2x64 with the appropriate
data rates for your application.
To prevent possible radio frequency interference emissions, a shielded
V.35 cable is required.
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Chapter 3. Installation
MAINTENANCE INTERFACE
The Maintenance interface is available at 9600 bps, 8 data bits, no
parity, no flow control, asynchronous format through the Mainte-
nance port. See Connector Pinouts on page 119 for the pinout of
the Maintenance port. A VT 100 terminal or null modem can be
connected to the Maintenance port using an EIA-232 cable. This
interface can be used to set internal S-registers, dial ISDN connec-
tions, and disconnect calls. This port also allows ADTRAN Tech-
nical Support personnel to retrieve vital information from the
unit if a problem is encountered during initial configuration of
the ISU 2x64. Most problems can be solved without resorting to
this port for assistance.
The ISU 2x64 Maintenance Help Screen can be activated by typ-
ing !? at either the DTE#1 or DTE#2 prompt. The screen is shown
in Figure 3-1.
Figure 3-1
VT 100 Maintenance Help Screen
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Chapter 3.Installation
DIAL INTERFACE CONNECTION
If out-of-band RS-366 dialing is required for applications such as
videoconferencing or FAX machines, the dialing interfaces of the
host DTE should be connected to the dial ports marked RS-366.
Pin assignments for the RS-366 connector are listed in the appen-
dix, Connector Pinouts.
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Chapter 4
Operation
MENU NAVIGATION
Moving through the various menu selections on the ISU 2x64 is a
simple task. Four function keys on the left-hand side of the key-
pad allow the user to enter, exit, and scroll through the various
menu branches. The four function keys are defined below.
To aid the reader, function keys are represented in bold, initial caps text.
Selectable menu items and messages displayed on the LCD are represent-
ed in bold type as they appear on the LCD.
Enter
Enters the selected item.
Scrolls up a menu tree.
Scrolls down a menu tree.
Up arrow
Down arrow
Cancel
Exits (back one level) from the current
branch of the menu.
Press either the Up or Down arrow to scroll through the menu
tree. To choose an item, press the corresponding number on the
keypad. The item blinks to show it is selected. Press Enter to
select the item. Press Cancel to exit back through the menu tree.
It is important to note that some features in the ISU 2x64 do not
immediately take effect upon selection. This prevents uninten-
tional reconfiguration of the ISU 2x64 during an active call. S-
BUS termination takes effect only when the unit is powered up.
To ensure the ISU is actually performing as configured, cycle the
power off then back on again, especially after changing ISDN
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Chapter 4.Operation
switch type, SPIDs, LDNs, or Leased/dial line. Also, items such
as bit rate, protocol, and call type take effect only at the begin-
ning of a new call.
Front Panel DTE Indicators
The front panel DTE indicators (see Figure 4-1) reflect the status
of each DTE port on the ISU 2x64. The indicators show the cur-
rent state of the port being displayed from the Current Status
menu. To change the DTE indicators between the two DTE ports,
use the Up and Down arrow keys to bounce between the two
DTE ports Current Status menus. Once this menu is exited, the
DTE indicators reflect the status of the DTE# that was last shown.
See Table 1-A on page 3 for a listing of the front panel DTE indica-
tors.
ISU 2X64
1
4
2
5
3
6
ENTER
7
8
0
9
RS CS TD RD CD TR SR
CANCEL
#
*
Figure 4-1
Current Status Menu
The ISU 2x64 automatically updates the Current Status menu to
the DTE# that is receiving an incoming call For example, if the
Current Status menu shows the state of DTE#1, and a call is
incoming on DTE#2, the ISU 2x64 automatically changes the dis-
play to show the Current Status menu for DTE#2. Change this by
using the Up and Down arrow keys to select either DTE.
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Chapter 4. Operation
VT 100 Menu Support
When connected to an asynchronous VT 100 terminal or VT 100
terminal emulator, use the built-in ISU 2x64 menu system for
configuration of both DTE ports. The VT 100 screens can be acti-
vated by typing AT!V while connected to either DTE port (in AT
command mode), or by typing !V at the prompt while using the
maintenance port. The maintenance port is an asynchronous port
always set to 9600 bps, 8 data bits, one stop bit, no parity, and no
flow control. By using the VT 100 screens on the maintenance
port, both DTE ports can be configured from one terminal. The
command Ctrl+P switches between DTE #1 and DTE #2.
GETTING STARTED
At power up, the ISU 2x64 runs a self test as indicated on the dis-
play. After approximately 10 seconds, Passed is momentarily dis-
played (if the ISU 2x64 does not pass the self test, see If Self Test
Fails on page 77). This is followed by the Current Status mode of
DTE#1. The Current Status mode DTE#2is shown by pressing
either arrow key. This is the recommended resting place for the
unit since it shows the current operational status of the unit. For
instance, if the ISU 2x64 is not connected to the network, the Cur-
rent Status menu displays ISU 2x64 DTE# (1 or 2) Link down. If
the unit is connected to the network and functioning properly, it
displays ISU 2x64 DTE# (1 or 2) Ready. A list of Current Status
messages is provided in Current Status Messages on page 95.
Pressing the Cancel key repeatedly returns the unit to the Cur-
rent Status menu. While at the Current Status menu, pressing
any key, except the Cancel and # keys, repeatedly changes the
display to the top of the menu tree. Pressing the # key brings up
the Dial submenu. While in a menu tree, pressing the # key
causes the unit to return to the Current Status menu.
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Chapter 4.Operation
The menu tree allows for set up and operation of the ISU 2x64
from the front panel. The main branches of the menu tree follow:
1. STATUS
2. TEST
3. CONFIG (ConÞguration)
4. DIAL
Status Buffer
Selecting 1=STATUS from the top of the menu tree displays the
contents of the status buffer. The Up and Down arrow keys allow
the viewing of the last fifty status messages generated during the
operation of the unit. (An explanation of Status Buffer Messages
can be found in Status Buffer Messages on page 99). Pressing the
Cancel key returns you to the top of the menu. Pressing the 0 key
will clear the entries from the status buffer.
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Chapter 4. Operation
Status Screen
To determine the current status of the unit, press Ctrl+V to access
the Status Screen (see Figure 4-2). The Status Screen displays unit
information such as the loop status, software revision, the result
of the initial self test, and the status buffer messages. (An expla-
nation of status buffer messages can be found in Status Buffer
Messages on page 99.)
Figure 4-2
VT 100 Status Screen
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Chapter 4.Operation
Configuration Screen
Once the unit is selected using the terminal interface, the display
shows the Configuration Menu (see Figure 4-3). This screen
shows the current configuration, line, and call status for the
selected unit. See Configuration on page 27 for more information
about configuring the ISU 2x64.
Figure 4-3
VT 100 Configuration Screen
To quickly and easily configure the ISU 2x64 for most applica-
tions, see Quick Setup on page 65.
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Chapter 5
Testing
TEST OPTIONS
Selecting 2=TEST from the top of the menu tree (Figure 5-2) or
Ctrl + T from any VT 100 screen displays available local testing
options; this screen is shown in Figure 5-1.
Figure 5-1
VT 100 Test Menu Screen
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Chapter 5.Testing
1=Loopback DTE
2=Loopback Netw.
3=Loopback Proto
4=Loopback Remot
5=Test Remote
1=STATUS
2=TEST
3=CONFIG
4=DIAL
1=No Rem Lpbks
2=DDS Accepted
3=V.54 Accepted
4=DDS+V54 Accept
6=Lpbk Disable
7=NEBE/FEBE
8=Software Ver
9=Lpbk Both DTEs
10=Test 2047 Both
Figure 5-2
Test Menu Tree
Loopback DTE
This test causes the DTE port to loop back toward user equip-
ment. This allows a bit error rate test (BERT) to be performed
from the local end-user equipment to the ISU 2x64 to verify
proper cable connection, etc. Either a BERT tester or DTE data
packet test must be used for this test.
Loopback Network
This test forces the ISU 2x64 to loop back both the B1 and B2
channels toward the network. This can be used to allow a far-end
user to perform a BERT all the way through the network.
Loopback Protocol
This test causes data to be looped back toward the network after
passing through a selected protocol such as T-Link or BONDING.
See Figure 5-3 for loopback points.
RATE
ADAPTION
NET
DTE
Protocol
DTE
Network
NETWORK
DTE
IFCE
IFCE
Figure 5-3
Loopback Points
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Chapter 5. Testing
Loopback Remote
This test causes the ISU 2x64 to issue a V.54 inband loopback
command to a far-end unit. External test equipment must be
used to generate/check test patterns. To use this feature, both
units must be configured for Clear Channel operation and the far-
end unit must be able to respond to V.54 loopback commands.
See Setting Protocol Options on page 55 to configure the unit for
Clear Channel operation. Press Cancel to end the test.
Test Remote
This test causes the ISU 2x64 to issue a V.54 inband loopback com-
mand to a far-end unit and BERT test the link using a built-in pattern
generator/checker. This allows a circuit to be tested without any
extra test equipment. To use this feature, both units must be config-
ured for Clear Channel operation and the far-end unit must be able
to respond to V.54 loopback commands. See the section Setting Pro-
tocol Options to configure the unit for Clear Channel operation. The
built-in 2047 pattern generator/checker displays the number of
bytes transmitted on the top line and the number of errored bytes
received on the lower line of the front panel display. Pressing 0 will
clear the counts. Pressing the Cancel key ends the test. Pressing the
down arrow will loop down the remote unit, allowing a test to a
loopback plug. Pressing 2 will insert errors.
Loopback Disable
The following options are available in Loopback Disable.
No Rem Lpbks: The ISU 2x64 ignores all V.54 and DDS loopback
commands.
DDS Accepted: The ISU 2x64 responds to DDS latching loopback
commands. This option only takes effect if the unit is in Leased
Line mode.
V.54 Accepted: The ISU responds to V.54 loopback commands.
DDS+V54 Accept: The ISU 2x64 responds to both DDS latching
loopback commands (Leased Line mode only) and V.54 loopback
commands.
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Chapter 5.Testing
The ISU 2x64 must be optioned for Clear Channel operation for DDS
and V.54 loopbacks to take effect.
NEBE/FEBE
This test reports the quality of the network connection between
the T-1 and the switch by viewing the number of near-end block
errors (NEBE) and far-end block errors (FEBE) occurring on the
ISDN interface. An incrementing count in NEBE means the prob-
lem is in the direction of the NT-1. An incrementing count in
FEBE means the problem is in the direction of the switch.
Software Version
This test determines the software version in use on the ISU 2x64.
Loopback Both DTEs
Choosing this option loops back both DTE ports simultaneously.
Test 2047 Both
Choosing this option is similar to Test Remote, except both ports
are tested simultaneously.
Press Cancel to exit any of these options.
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Chapter 6
Configuration
DIAL LINE OPERATION
This section explains how to configure the ISU 2x64 when using
ISDN Basic Rate switched service. Figure 6-3 illustrates the entire
menu tree.
The following are step-by-step procedures for configuring the
unit for dial line operation, switch protocol, call type, terminal ID,
dial options, auto answer, answer tone, connect timeout, call
screening, and SBus termination.
To dial calls over the ISDN, the unit must be configured for Dial
Line. The menu path to select Dial Line operation is shown in Fig-
ure 6-1.
1=Dial Line
1=Netw. options
2=DTE options
3=Protocol
2=Leased Line
3=CONFIG
4=Quick setup
5=Security
6=Remote Config
Figure 6-1
Dial Line Menu Tree
When using a VT 100 terminal, press Ctrl + C to access the Con-
figuration screen, then set the Line type option to Dial Line. The
screen appears as shown in Figure 6-2.
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Chapter 6. Configuration
Figure 6-2
VT 100 Configuration Menu Screen
Setting the Switch Protocol
Find out what kind of ISDN switch the local CO is using by asking
the telephone administrator or telephone company representa-
tive. Configure the ISU 2x64 for either Northern Telecom DMS-
100, AT&T 5ESS¨, or a switch conforming to the National ISDN-1
standard (usually an AT&T 5ESS, NT DMS-100¨, or Siemens
EWSD). For switches outside of North America, use the Euro IS-
DN, VN4, TDX10, TDX1B, KDD, NTT, or NEC switch types.
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Chapter 6. Configuration
1=AT&T 5ESS
2= DMS-100
3=National ISDN1
4=NEC Switch
5=TDX10*
6=TDX1B*
7=EuroISDN*
8=VN4*
9=KDD*
10=NTT*
1=Switch Protocl
*Only available on part number
1200051L5 and 1200051L6.
STATUS
‘Buffer Display’
<Use Up and Down keys to Scroll>
KEY
dte#1
dte#2
This symbol means the menu items that follow can
be configured for DTE#1 or DTE#2 when entering these
portions of the menu tree. Use the up and down ARROW
keys to choose DTE#1 or DTE#2.
Press ENTER to select.
Use the CANCEL key to back up.
dte#1
dte#2
2=Call type
1=Speech
2=Audio
3=Data 56Kbps
4=Data 64Kbps
1=1 sec or EON
dte#1
dte#2
TEST
1=Loopback DTE
2=Loopback Netw.
3=Loopback Proto
4=Loopback Remot
5=Test Remote
6=Lpbk Disable
7=NEBE/FEBE
8=Software Ver
9=Lpbk Both DTE
2=2 sec or EON
3=5 sec (default)
4=10 sec or EON
5=20 sec or EON
6=Wait for EON
3=Terminal ID
4=Busy Out
Set SPID
dte#1 <SPID>
dte#2 <SPID>
Set LDN dte#1 <LDN>
dte#2 <LDN>
NOTE: Bold type represents default.
1=No Rem Lpbks
2=DDS Accepted
3=V54 Accepted
4=DDS + V54 Accept
1=Enabled
2=Disabled
1=V.25 HDLC
1=Front Panel
2=RS-366
3=AT commands
4=V.25
2=V.25 ASYNC
3=V.25 BISYNC
4=V.25 HDLC FLAG
dte#1
dte#2
0=Test 2047 Both
5=Dial options
6=Auto answer
5=Disabled
dte#1
dte#2
1=Disabled
2=Enabled
3=Dump all calls
dte#1
dte#2
7=Answer tone
1=No answer tone
2=Incoming tone
3=Outgoing tone
4=Always tone
1=Bit Rate
1=300
6=19200
7=38400
8=57600
9=115200
2=1200
3=2400
4=4800
5=9600
8=Connect Timout 1=15 sec
2=30 sec (def)
3=1 minute
4=2 minute
5=4 minute
1=Netw. options
1=Dial Line
2=Connector Type 1=RS-530
2=V.35
2=Leased Line
3=RS-232
9=Call Screening 1=Answer any
1=Clock mode
1=Slave
2=Master
2=Ansr if SNO…9
3=RTS Options
4=CTS Options
5=CD Options
1=1 ms delay
2=18 ms delay
2=Channel rate
1=64k
2=128k
CONFIG
10=SBUS Terminati 1=100 ohm On
1=Forced CTS
2=Follows RTS
2=100 ohm Off
3=SBus Terminati
1=100 ohm On
2=100 ohm Off
1= CD Forced on
2=Normal
1=Asynchronous
3=Off with LOCD
4=Off Link Down
2=DTE options
3=Protocol
dte#1
dte#2
2=Synchronous
1=Bit Rate
1=2400
2=4800
3=9600
4=19200 9=112000
5=38400 0=128000
6=48000
7=56000
8=64000
6=DTR Options
1=Ignore DTR
2=Cmd when Off
3=Idle when Off
4=Off>On dial #0
5=Dial #0 if On
6=Answer if On
1=TXINIT
2=TXFA
3=TXADD01
4=TXDEQ
5=TANULL
6=TCID
dte#1
dte#2
1=Clear Channel
2=BONDING mode 1
3=V.120
4=V.110
5=DSU 57.6 ASYNC
6=T-LINK
7=SAP
8=FALLBACK
9=PPP asyn-sync
2=Connector Type 1=RS-530
2=V.35
3=RS-232
7=DSR Options
8=Flow Control
9=Data Format
1=DSR forced on
2=OFF Idle+Test
3=OFF Link Down
7=Async Rev
3=RTS Options
4=CTS Options
5=CD Options
1=1 ms delay
2=18 ms delay
1=PPP
2=Multilink PPP
3=PPP w/Comp
1=Hardware Flow
2=Software Flow
3=No Flow Ctrl
1=Forced CTS
2=Follows RTS
dte#1
dte#2
4=Quick setup
1=Dial 56K sync
2=Dial 64Ksync
3=Dial 112K sync
4=Dial 128K sync
5=Dial 57.6 asyn
6=Dial 115.2 asy
7=Fallback 57.6k
8=Leased 64K
1=CD Forced on
2=Normal
3=Off with LOCD
4=Off Link Down
1=Data Bits
1=8 Data bits
2=7 Data bits
2=Parity Bits
1=None
2=Odd
3=Even
6=DTR Options
1=Ignore DTR
2=Cmd when Off
3=Idle when Off
4=Off>On dial #0
5=Dial #0 if On
6=Answer if On
9=Ldm 64K Master
3=Stop Bits
1=1 Stop bit
2=1.5 Stop bits
3=2 Stop bits
5=Security
Password <
>
1=Set Password
2=Lock Keypad
1=Number <
2=Password <
>
Password Required
dte#1
dte#2
>
6=Remote Config
1=Cfg. Rmt. Unit
2=Set Password
3=Lpbk remote 1B Number <
4=Lpbk remote 2B Number <
7=DSR Options
1=DSR forced on
2=OFF Idle+Test
3=OFF Link Down
Password <
>
>
>
dte#1
dte#2
1=Hang up line
2=Dial number
3=Redial last #
4=Answer Call
5=Dial Stored #
6=Store/Review #
DIAL
8=Transmit Clock
1=Normal
2=External
Figure 6-3
LCD Configuration Menu Tree
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Chapter 6. Cofiguration
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Chapter 6. Configuration
Setting the Call Type
Call type is configured for both DTE#1and DTE#2. When using
the front panel, select the appropriate DTE with either arrow key
and press Enter. When using a VT 100 terminal, select the option
number corresponding to the appropriate DTE and press Return.
The Call type can be configured four different ways, depending
on the type of service used: Speech , Audio, Data 56 kbps, or
Data 64 kbps.
Speech
Speech directs the call control software to request a Mu-law (or
A-law) speech circuit as the bearer capability for outgoing calls.
The Speech option is used with an ISDN line configured for voice
service. In some areas voice service is less expensive than data
service. A Speech call type does not guarantee an end-to-end
digital connection with some local and long distance carriers.
Audio
Audio directs the call control software to request a 3.1 kHz audio
circuit as the bearer capability for outgoing calls. The Audio
option is used with an ISDN line configured for voice service. In
some areas audio service is less expensive than data service.
Selecting Audio guarantees a digital end-to-end ISDN connec-
tion.
Data 56kbps
Data 64kbps
Data 56kbps directs the call control software to request a 64 kbps
data circuit that is rate-adapted to 56 kbps. Data 56 kbps is
intended for use in circumstances where interoperability with
Switched-56 service is desired.
The default Call type for ISDN service is Data 64 kbps. This
directs the call control software to request an unrestricted 64 kbps
circuit.
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Chapter 6. Configuration
Smart Dial Strings
In some cases during a dial session it may be desired to change
the call type temporarily. At the end of a dialed phone number, a
#1,2,3, or 4 can be used to change the call type. A #1 changes it to
speech, #2 to Audio, #3 to 56K, and #4 to 64K.
Setting the Terminal ID
Terminal identification is assigned by the local telephone com-
pany and consists of a SPID and LDN number.
Setting the SPID
In North America, the SPID is a sequence of digits used to identify
ISDN terminal equipment to the ISDN switch. The SPID is assigned
by the local phone company when the ISDN line is installed and usu-
ally looks similar to the phone number. Obtain the SPIDs from the
telephone administrator or local telephone representative. The num-
ber of SPIDs required (0, 1, or 2) depends on how the ISDN line is con-
figured. For instance, a point-to-point line has no SPID. Multipoint
lines may have one or two SPIDs. If the line has only one SPID, then
it must be entered in SPID DTE#2. It is recommended to use two
SPIDs with the ISU 2x64, with a SPID assigned to each DTE port.
When entering a SPID using the front panel, use the Up and Down
arrow keys to select between SPID DTE#1and SPID DTE#2. Press
Enter to select the DTE. Use the keypad to enter the SPID. While
keying/editing a SPID, the Down arrow allows backspacing
through the number string to correct mistakes. The Up arrow scrolls
back to the last digit entered. After entering each SPID, press Enter.
To abort changes at any time, press Cancel. The changes are dis-
carded, leaving the original number unchanged. If entering the SPID
using the VT 100 terminal, select the option number corresponding
to the appropriate DTE and press Return. Enter the number using
the keyboard and press Return to store the number.
Disconnect the network interface from the unit before initially entering and/
or altering the SPIDs or LDNs.
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Chapter 6. Configuration
Setting the LDN
This option allows the entry of 0, 1, or 2 LDNs. The LDN is used
when receiving BONDING calls or receiving separate calls for
each DTE connection. The LDN is the seven-digit local phone
number assigned to the line.
When entering an LDN using the front panel, use the Up and
Down arrow keys to select between LDN DTE#1and LDN
DTE#2. Press Enter to select the DTE. Use the keypad to enter
the LDN. The Up and Down arrow keys edit the number if nec-
essary. To store the number press Enter. To cancel a number, use
the Down arrow to backspace through the number, then press
Enter. After entering each LDN, press Enter. To abort changes at
any time, press Cancel. The changes are discarded, leaving the
original number unchanged.
When using a VT 100 terminal, select the option number corre-
sponding to the appropriate DTE and press Return.
SPID and LDN numbers are entered in pairs and should not be
crossed between the two DTE ports. Each SPID has a unique
LDN. Enter a SPID-LDN pair for DTE#1and a separate SPID-
LDN for DTE#2. Ensure that the SPID for DTE#1matches the
LDN for DTE#1, and the SPID for DTE#2matches the LDN for
DTE#2.
Disconnect the network interface from the unit before initially entering and/
or altering the SPIDs or LDNs.
Setting the Busy Out Port
The Busy Out Port is recommended for use in Hunt Group appli-
cations only. This option allows the ISU 2x64 to command the
switch to no longer route calls to the 2x64. The Busy Out Port
requires the ISDN line to be configured by the telephone com-
pany to support the Make Busy feature and a feature button
number to be assigned for activating and deactivating busy sta-
tus.
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Chapter 6. Configuration
Feature buttons are buttons that are normally available on ISDN
telephone sets. The ISU 2x64 simulates pressing a feature button
when the Busy Out Port option is changed. When the Busy Out
Port option is changed, the ISU 2x64 sends a Feature Activation
message to the switch using the feature button number stored in
S-register 23. If S-register 23 is not programmed with the correct
button number for the Make Busy feature, the switch will not
change the busy status of the ISU 2x64. The telephone company
will need to tell you which feature button number was assigned
to the Make Busy feature.
Enabled
Disabled
To turn on the Make Busy feature, configure Busy Out Port for
Enabled.
To turn off the Make Busy feature, configure Busy Out Port for
Disabled.
Multi-point lines must be used for per-port operation of the Busy Out Port
feature.
Setting the Dial Options
The ISU 2x64 can be configured to dial using the Front Panel, RS-
366 port, AT Commands, or V.25 bis Commands.
Front Panel
RS-366
To establish and disconnect calls from the front panel keypad
configure Dial options for Front Panel. See Front Panel Dialing
Options on page 63 for more detail.
Configuring the ISU 2x64 for RS-366 enables out-of-band dialing
over the RS-366 port. To establish and disconnect calls using the
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Chapter 6. Configuration
RS-366 parallel dialing port, configure the unit for RS-366 dialing.
(See Figure 6-4.) This enables the RS-366 port on the rear of the
unit. Whenever this dialing mode is enabled, data terminal ready
(DTR) must be active before a call is placed. The call may be dis-
connected by dropping DTR, or from the front panel by selecting
the # (pound) key to go directly to the Dial menu and selecting
1=Hang up line, then Enter.
DTE RS-366 dialers can end their string of dialed numbers in two
different ways. The end of number (EON) alerts the ISU 2x64
that the entire number has been sent. Another method is to sim-
ply stop sending numbers and allow the ISU 2x64 to time out,
then dial the number. The ISU 2x64 supports both methods of
dialed number terminations. The following options allow the
dialed number termination to be fine-tuned:
1=Switch protocl
1=1 sec or EON
2=Call type
2=2 sec or EON
1=Front Panel
1=Dial Line
3=Terminal ID
3=5 sec(default)
4=10 sec or EON
5=20 sec or EON
6=Wait for EON
2=RS-366
1=Netw. options
2=DTE options
3=Protocol
2=Leased Line
4=Busy Out
3=AT commands
4=V.25
5=Dial options
6=Auto answer
7=Answer tone
8=Connect Timout
9=Call Screening
10=SBus Terminati
3=CONFIG
5=Disabled
4=Quick setup
5=Security
6=Remote Config
Figure 6-4
Dial Options, RS-366 Menu Tree
1 sec or EON:
The ISU 2x64 assumes the dial string is fully entered if more than
one second elapses since the last digit was keyed, or the unit
receives the EON command.
2 sec or EON:
The ISU 2x64 assumes the dial string is fully entered if more than
two seconds elapse since the last digit was keyed, or the unit
receives the EON command.
5 sec or EON (def):
10 sec or EON:
The ISU 2x64 assumes the dial string is fully entered if more than
five seconds elapse since the last digit was keyed, or the unit
receives the EON command. This is the factory default setting.
The ISU 2x64 assumes the dial string is fully entered if more than
10 seconds elapse since the last digit was keyed, or the unit
receives the EON command.
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Chapter 6. Configuration
20 sec or EON:
The ISU 2x64 assumes the dial string is fully entered if more than
20 seconds elapse since the last digit was keyed, or the unit
receives the EON command.
Wait for EON:
The ISU 2x64 assumes the dial string is fully entered only if the
unit receives the EON command.
AT Commands
Configuring the ISU 2x64 for AT commands enables inband dial-
ing over a DTE interface using asynchronous AT commands. AT
commands can be used to set up the ISU 2x64 as well as establish
and end a call. Calls can be disconnected from the front panel (as
described previously) or from the far-end unit. Do not set the unit
up for AT command in synchronous applications.
When AT commands are selected, the DTE port becomes dual
purpose. First, while a call is not established, the port accepts AT
commands. During this time, the CD signal is inactive. Second,
when a call is established, the port is used for data. This data
mode is indicated by the CD signal active. See the appendix AT
Commands for a listing of the supported AT commands and their
functions. In addition to the front panel, the ISU 2x64 can be con-
figured and controlled with inband AT commands from an asyn-
chronous DTE port just as modems are.
To exit data mode and enter command mode, the asynchronous
DTE device must transmit a proper escape sequence to the ISU
2x64. A specified time delay must occur between the last data
character and the first escape sequence character. This is the
guard time delay, and it can be changed by writing a value to the
S12 register. The default value for the guard time is one second.
For a valid escape sequence to occur, the DTE must transmit the
escape code character three times in succession with delay
between each character being less than the guard time. The
default escape sequence is +++.
Once command mode is entered, AT commands can be transmit-
ted to the ISU 2x64 to configure most of the options, dial remote
ISUs, or initiate tests to check both the ISU 2x64 and the network
connections. All command lines must begin with the AT charac-
ter set in either capital or lower case letters. A command line can
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Chapter 6. Configuration
be terminated at any time by transmitting the CTRL+X (ASCII
018) after the AT attention code. The ISU 2x64 ignores this com-
mand line and issues an OK response.
The command line may contain a single command or a series of
commands after the AT attention code. When a series of com-
mands are used, the individual commands may be separated
with spaces for readability.
The maximum length for a command line is 40 characters. Each
command line is executed by the ISU 2x64 upon receipt of a ter-
minating character.
The default terminating character is a carriage return (ASCII 013),
but it can be changed by writing a different value to register S3.
Before the terminating character is transmitted, the command
line can be edited by using the backspace character (ASCII 008) to
erase errors so the proper commands can be entered. Examples
of using AT commands are as follows.
Using an AT Command
Type AT followed by the letter of the command and numeric
value of the setting desired and then press Enter.
Example: ATI1
Returns the software version of the unit.
Using S-Registers
The configuration of the ISU 2x64 can be changed and/or
reviewed with S-registers. See the appendix S-Register List for a
description of each S-register and its corresponding range of val-
ues.
Reading an S-Register
Type ATS followed by the number of the S-register to be read fol-
lowed by a question mark and press Enter.
Example: ATS0?
The ISU 2x64 uses S-register strings to store strings of digits for
stored phone numbers, SPIDs, etc.
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Chapter 6. Configuration
Reading an S-register String
Type ATSS followed by the number of the string S-register to be
read followed by a question mark and press Enter.
Example: ATSS80?
To Change an S-register
Type ATS followed by the number of the S-register to be
changed, an equal sign, the numeric value to be assigned to the
register, then press Enter.
Example: ATS0=2
Changing a String S-register
Type ATSS followed by the number of the string S-register to be
changed, an equal sign, the numeric string to be assigned to the
register, then press Enter.
Example: ATSS80=5551212
Dialing a Call by the AT Command Processor
To dial a call using the DTE terminal and AT commands; type
ATD and the telephone number on one line and press Enter.
Example: ATD5551212
When the dialing process begins, the front panel reads Dialing
5551212. If the call is successful, Connect is displayed on the
front panel, followed by the rate adaptation protocol in use and
the bit rate. If the call is not successful, the front panel displays
Disconnect followed by Ready. At this point the unit is ready for
another call. The status buffer can be examined to find the reason
for an unsuccessful call.
To end an active call with the AT command processor press the
break in key sequence , +++ or the redefined key, then type ATH
and press Enter to hang up the line.
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Chapter 6. Configuration
V.25
Configuring the ISU 2x64 for V.25 bis (see Figure 6-5) enables
inband dialing over a DTE interface using asynchronous or syn-
chronous V.25 bis commands. V.25 bis can be used to establish
and end a call. Disconnecting calls can also be done from the
front panel (as described previously), from a VT 100 terminal, or
from the far-end unit.
V.25 bis dialing is used primarily by DTE with synchronous inter-
faces (HDLC/SDLC or BSC/BISYNC) not supporting the AT
command set, which is commonly used by asynchronous
devices. The ISU 2x64 supports V.25 bis inband dialing in accor-
dance with Fascicle V.III-V.25 bis (Malaga-Torremolinos 1984,
Melbourne 1988).
1=Switch protocl
2=Call type
1=Front Panel
1=Dial Line
3=Terminal ID
2=RS-366
1=Netw. options
2=DTE options
3=Protocol
2=Leased Line
4=Busy Out
1=V.25 HDLC
3=AT commands
4=V.25
3=CONFIG
5=Dial options
6=Auto answer
7=Answer tone
8=Connect Timout
9=Call Screening
10=SBus Terminati
2=V.25 ASYNC
3=V.25 BISYNC
4=V.25 HDLC FLAG
5=Disabled
4=Quick setup
5=Security
6=Remote Config
Figure 6-5
Dial Options, V.25 bis Menu Tree
Recommendation V.25 uses the following DCE/DTE control sig-
nals:
Transmitted Data. . . . . . . . . . . . . . . . . . . . . . . . . . . .Circuit 103
Received Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Circuit 104
Ready for Sending. . . . . . . . . . . . . . . . . . . . . . . . . . .Circuit 106
Data Set Ready. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Circuit 107
Data Terminal Ready . . . . . . . . . . . . . . . . . . . . . . . .Circuit 108/2
Calling Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . .Circuit 125
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Chapter 6. Configuration
The ISU supports the following V.25 bis commands to control
automatic calling and answering:
CRN . . . . . . . . . . . . . . . . . . . . Call Request (number in command)
CRS . . . . . . . . . . . . . . . . . . . . . Call Request (using stored number)
PRN . . . . . . . . . . . . . . . . . . . . Program Stored Number
RLN . . . . . . . . . . . . . . . . . . . . List Stored Number
CIC . . . . . . . . . . . . . . . . . . . . . Connect Incoming Call
DIC . . . . . . . . . . . . . . . . . . . . . Disconnect Incoming Call
When using stored numbers, V.25 bis accesses stored numbers 1 through
9 used by front panel dialing. See Front Panel Dialing Options on
page 63.
The following configuration (see Figure 6-6) for Auto answer
should be selected if V.25 bis is in control of answering incoming
calls with the CIC/DIC commands, since the other settings for
Auto answer will override V.25 control of the answer function.
1=Switch protocl
2=Call type
3=Terminal ID
1=Dial Line
4=Busy Out
1=Netw. options
2=DTE options
3=Protocol
2=Leased Line
1=Disabled
2=Enabled
5=Dial options
3=CONFIG
6=Auto answer
7=Answer tone
8=Connect Timout
9=Call Screening
10=SBus Terminati
3=Dump all calls
4=Quick setup
5=Security
6=Remote Config
Figure 6-6
Dial Line, Auto Answer Menu Tree
V.25 ASYNC Dialing
V.25 bis specifies that the characters should be ASCII, 7 bits, even
parity and one stop bit. However, for versatility the ISU 2x64
allows the data bits, parity, and stop bits as defined under Data
Format. (See Figure 6-7.)
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Chapter 6. Configuration
1=Bit Rate
2=Connector Type
3=RTS Options
4=CTS Options
5=CD Options
6=DTR Options
7=DSR Options
8=Flow Control
9=Data Format
1=Netw. options
2=DTE options
3=Protocol
1=Asynchronous
3=CONFIG
2=Synchronous
4=Quick setup
5=Security
1=8 Data bits
2=7 Data bits
1=Data Bits
2=Parity Bits
3=Stop Bits
6=Remote Config
Figure 6-7
Data Bits Menu Tree
The setting in Figure 6-8 allows for V.25 bis messages in asyn-
chronous (start/stop) data format.
1=Switch protocl
2=Call type
1=Front Panel
1=Dial Line
3=Terminal ID
2=RS-366
1=Netw. options
2=DTE options
3=Protocol
2=Leased Line
4=Busy Out
1=V.25 HDLC
3=AT commands
4=V.25
5=Dial options
6=Auto answer
7=Answer tone
8=Connect Timout
9=Call Screening
10=SBus Terminati
3=CONFIG
2=V.25 ASYNC
3=V.25 BISYNC
4=V.25 HDLC FLAG
5=Disabled
4=Quick setup
5=Securtiy
6=Remote Config
Figure 6-8
V.25 bis ASYNC Menu Tree
Although V.25 bis allows asynchronous data format, asynchro-
nous DTE is more likely to support the AT command set than
V.25 bis.
V.25 SYNC HDLC Dialing
To set the Dial Options for V.25 HDLC, choose 1=V.25 HDLC
from the front panel or the VT 100 terminal (see Figure 6-8 for the
menu tree). This setting provides V.25 bis messages in bit-syn-
chronous format (for example HDLC, SDLC, X.25). The bit-syn-
chronous format is the most commonly used by V.25 bis.
This option specifies that the characters should be 7-bit ASCII,
with the 8th bit ignored (it may be either 0 or 1).
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Chapter 6. Configuration
The first byte of each packet contains all ones (A = FF HEX), and
the second byte of each packet (the C byte) is either 13 HEX or 03
HEX if not the final packet.
V.25 SYNC BISYNC Dialing
To set the Dial Options for V.25 BISYNC, choose 3=V.25 BISYNC
from the front panel or the VT 100 terminal (see Figure 6-8 for
menu tree). This setting allows for V.25 bis messages in byte syn-
chronous format (BISYNC). V.25 bis specifies that the characters
should be ASCII, 7 bits, and odd parity. This setting allows syn-
chronous data terminal equipment which does not use HDLC to
support serial inband dialing.
V.25 HDLC FLAG
To set the Dial Options for V.25 HDLC FLAG, choose 4=V.25
HDLC FLAG from the front panel or the VT 100 terminal (see Fig-
ure 6-8 for menu tree). Configuring the ISU 2x64 for HDLC
FLAG V.25 bis enables in-band dialing over a DTE interface using
standard synchronous HDLC V.25 bis commands with 7E HEX
idle.
Disabled
This selection disables in-band dialing over the DTE interface.
Setting Auto Answer
Auto answer is configured separately for both DTE#1 and
DTE#2. Using the front panel, select the appropriate DTE with
either arrow key and press Enter. When using a VT 100 terminal,
select the option number corresponding to the appropriate DTE
and press Return.
The ISU 2x64 can be configured to automatically answer in one of
three ways: Disabled, Enabled, or Dump all calls.
Disabled
When Disabled is selected, the ISU 2x64 will not answer the call.
The AT answer command (ATA) must be issued to the ISU 2x64
for it to accept the incoming call or by selecting Answer Call
from dial menu. The ringing call can be dumped by using the
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Chapter 6. Configuration
Hang up line command or answered using the Answer Call
command. (These commands are found under the Dial branch of
the menu tree. See Front Panel Dialing Options on page 63.)
Enabled
When Enabled is selected, the incoming call is answered. If that
call is a BONDING call and requires two B channels, the second
call is answered. The port assigned to that second SPID-LDN
pair is disabled during the duration of the BONDING call.
Dump all calls
When Dump all calls is selected, the ISU 2x64 does not accept
any incoming calls. This keeps the line clear for outgoing calls.
Setting Answer Tone
Answer tone is configured separately for both DTE#1 and
DTE#2. Using the front panel, select the appropriate DTE with
either arrow key and press Enter. (See Figure 6-9.) When using a
VT 100 terminal, select the option number corresponding to the
appropriate DTE and press Return.
The Answer tone option enables the transmission of a modem
answer tone at the start of voice and audio calls. The purpose of
this tone is to disable echo suppression for echo cancellation on
the circuit in order to get a clear digital circuit. This may be nec-
essary on some long distance circuits. The specifics of the tone
are 4 seconds, 2100 Hz at a -10 dB level with phase reversals
every 475 µs.
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Chapter 6. Configuration
1=Switch protocl
2=Call type
3=Terminal ID
4=Busy Out
1=Dial Line
1=Netw. options
2=Leased Line
1=No Answer tone
2=Incoming tone
3=Outgoing tone
4=Always tone
5=Dial options
6=Auto answer
7=Answer tone
8=Connect Timout
9=Call Screening
10=SBus Terminati
2=DTE options
3=Protocol
3=CONFIG
4=Quick setup
5=Security
6=Remote Config
Figure 6-9
Answer Tone Menu Tree
No Answer tone (Default)
This option disables the Answer tone on all calls.
This option enables the Answer tone on incoming calls.
This option enables the Answer tone on outgoing calls.
Incoming tone
Outgoing tone
Always tone
This option enables the Answer tone on either incoming or out-
going calls.
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Chapter 6. Configuration
Setting Connect Timout
Connect Timout sets the length of time that the ISU 2x64 waits
for a far-end unit to answer an outgoing call. These choices are
illustrated in Figure 6-10.
1=Switch protocl
2=Call type
1=Dial Line
3=Terminal ID
1=Netw. options
2=DTE options
3=Protocol
2=Leased Line
4=Busy Out
1=15 sec
3=CONFIG
5=Dial options
2=30 sec (def)
3=1 Minute
4=2 Minute
5=4 Minute
6=Auto answer
7=Answer tone
8=Connect Timout
9=Call Screening
10=SBus Terminati
4=Quick setup
5=Security
6=Remote Config
Figure 6-10
Connect Timout Menu Tree
Setting Call Screening
Call Screening allows the ISU 2x64 to either answer all incoming calls
(default) or only calls originating from phone numbers stored in the
DIAL menu as stored numbers SN0 through SN9. See Front Panel
Dialing Options on page 63 to review how to store numbers. Figure
6-11 illustrates the menu tree for setting call screening.
1=Switch protocl
2=Call type
1=Dial Line
3=Terminal ID
1=Netw. options
2=DTE options
3=Protocol
2=Leased Line
4=Busy Out
3=CONFIG
5=Dial options
6=Auto answer
7=Answer tone
8=Connect Timout
9=Call Screening
10=SBus Terminati
4=Quick setup
5=Security
1=Answer any
2=Ansr if SN0. . .9
6=Remote Config
Figure 6-11
Call Screening Menu Tree
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Chapter 6. Configuration
When Call Screening is set to Ansr if SN0. . .9, an incoming call
is not answered if the Call ID received from the switch does not
match a stored number. Depending on the switch type, the Call
ID may be presented in either a seven- or ten-digit format. The
ISU 2x64 displays the Call ID for all dumped calls in the Status
Buffer. See Status Buffer on page 20 for more information.
Because different switches handle calls and Call ID differently,
first find out if the switch uses a seven- or ten-digit Call ID for-
mat. Use the following procedure to determine if a seven- or ten-
digit Call ID (phone number) should be stored.
1. Select Ansr if SN0. . .9 under Call Screening.
2. Store the seven-digit number in SN0.
3. Place a call to the ISU 2x64 with the stored number to see if it
answers properly.
4. If the ISU 2x64 does not answer the call, check the Call ID
message in the Status Buffer. More than likely, the Call ID
number will be a ten-digit number.
5. Reenter the number in SN0 as it is displayed in the Call ID
message and test Call Screening again.
SBus Termination
Use the SBus Termination option (see Figure 6-12) to select 100
ohm termination resistors for the S/T interface on ISU 2x64 units
that are equipped for the ISDN S/T interface. These units (part
numbers 1200051L2, 1200051L4, 1200051L5, and 1200051L6) con-
nect to the S/T interface of an NT1 device or the S/T line card.
1=Dial Line
1=Switch protocl
1=Netw. options
2=DTE options
3=Protocol
2=Leased Line
2=Call type
3=CONFIG
3=Terminal ID
4=Busy Out
4=Quick setup
5=Security
5=Dial options
6=Auto answer
7=Answer tone
8=Connect Timout
9=Call Screening
0=SBus Terminati
6=Remote Config
1=100 ohm On
2=100 ohm Off
Figure 6-12
SBus Termination Menu Tree
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Chapter 6. Configuration
Select 100 ohm On to turn on the 100 ohm termination resistance
across the S/T transmit and receive pairs. Select 100 ohm Off to
turn off the 100 ohm termination resistance across the S/T trans-
mit and receive pairs.
The SBus Termination resistors are not present on ISU 2x64 units
equipped with the integrated NT1 (part numbers 1200051L1 and
1200051L3). Setting the SBus Termination resistance to on or off
on these units has no effect on their operation and can be ignored.
LEASED LINE SERVICE
This section explains how to configure the ISU 2x64 when using a
2B1Q leased digital service or a service providing a permanent con-
nection between end points. The distance can be up to 18000 feet.
1=Slave
2=Master
1=Clock mode
2=Channel rate
3=SBus Terminati
1=Dial Line
1=64k
2=128k
1=Netw. options
2=DTE options
3=Protocol
2=Leased Line
3=CONFIG
1=100 ohm On
2=100 ohm Off
4=Quick setup
5=Security
6=Remote Config
Figure 6-13
Leased Line Menu Tree
Selecting Leased Line configures the unit for leased line service
or service providing a permanent connection between end points
such as limited distance modem or LDM service.
Follow this step-by-step procedure to configure the ISU 2x64 for
Leased Line, Clock mode, Channel rate, and S Bus Termination.
Clock mode: Slave/Master
By configuring the ISU 2x64 for Master timing, the ISU 2x64 can
provide clocking for both ends of the phone line. This Master
option is intended to be used at one end of a limited distance
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Chapter 6. Configuration
modem application, where two ISU 2x64 units are directly con-
nected without the use of channel banks (see Figure 6-14). The
far-end unit should be configured for Slave and derives its clock-
ing from the ISU 2x64 configured as Master.
64K
64K
64K
18 kFt
64K
ISU 128
ISU 128
ENTER
1
4
7
#
2
5
8
0
3
6
9
ENTER
1
4
7
#
2
5
8
0
3
6
9
RS CS TD
RD LD TR SR
RS CS TD
RD LD TR SR
CANCEL
CANCEL
*
*
Mixed Gauge Wire
ISU 2x64 (U-interface)
ISU 2x64 (U-interface)
LDM 64 Master
Channel Rate = 64K
DTE
DTE
Leased 64K
Channel Rate = 64K
Figure 6-14
Limited Distance Modem Applications
If two ISU 2x64 units are connected through channel banks, both
units should be configured for Slave mode (see Figure 6-15).
BIMUX DP
or Equivalent
BIMUX DP
or Equivalent
64K
64K
T1
XXXXX
X X X X X
X X X X X
XXXXX
XXXXXXXXX
X X X X X X X X X
64K
64K
ISU 128
ISU 128
ENTER
1
4
7
#
2
5
8
0
3
6
9
ENTER
1
4
7
#
2
5
8
0
3
6
9
R
S
C
S
T
D
R
D
L
D
T
R
S
R
R
S
C
S
T
D
R
D
L
D
T
R
SR
CANCEL
CANCEL
*
*
ISU 2x64
Channel Rate = 64K
ISU 2x64
Channel Rate = 64K
DTE
DTE
Figure 6-15
Leased Application with Channel Banks
Channel Rate
In Leased Line operation, the channel rate for the ISU 2x64 can be
configured for 64 kbps or 128 kbps. When the channel rate is set
to 64 kbps, each DTE port is assigned one of the bearer channels.
For example, if two ISU 2x64 units are configured for leased line
service and the channel rate is set to 64 kbps in both units, then
DTE#1 of the master unit and DTE#1 of the slave unit would be
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Chapter 6. Configuration
connected through one of the bearer channels and could utilize
up to 64 kbps of bandwidth. Likewise, DTE#2 of the master and
DTE#2 of the slave would be connected through the other bearer
channel and could also utilize up to 64 kbps of bandwidth (see
Figure 6-15).
When the channel rate is set for 128 kbps in both units, both
bearer channels are assigned to one DTE port. This assignment is
user-configured. Select a DTE rate higher than 64 kbps for the
DTE port that will run the application requiring greater than 64
kbps bandwidth. Select the same DTE port for both Master and
Slave 2x64 units. Set the unused DTE port's DTE rate to a rate
less than 64 kbps to facilitate correct operation between the two
ISU 2x64 units.
For example, if an application requiring 128 kbps was run
through DTE#1, first configure the channel rate of the leased line
to 128 kbps and set the DTE rate for DTE#1to 128 kbps synchro-
nous. The DTE rate for DTE#2should be set at 56 kbps or lower.
Enter these settings into both units. This allows an application to
utilize up to 128 kbps of bandwidth between DTE#1on the mas-
ter unit and DTE#1on the slave unit.
SBus Termination
SBus Termination selects 100 ohm termination resistors for the S/
T interface on ISU 2x64 units that are equipped for the ISDN S/T
interface. These units (part numbers 1200051L2, 1200051L4,
1200051L5, and 1200051L6) connect to the S/T interface of an
NT1 type device or the S/T line card.
Select 100 ohm On to turn on the 100 ohm termination resistance
across the S/T transmit and receive pairs. Select 100 ohm Off to
turn off the 100 ohm termination resistance across the S/T trans-
mit and receive pairs.
The SBus Termination resistors are not present on ISU 2x64 units
equipped with the integrated NT1 (part numbers 1200051L1 and
1200051L3). Setting the SBus Termination resistance on these
units has no effect on their operation and can be ignored.
Units with S/T interface will not work in master mode.
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Chapter 6. Configuration
DTE Options for Asynchronous and Synchronous Operation
The DTE options are configured separately for both DTE#1 and
DTE#2. When using the front panel, select the appropriate DTE
with either arrow key and press Enter. (See Figure 6-16 and 6-17.)
When using the VT 100 terminal select the option number corre-
sponding to the appropriate DTE and press Return.
Ensure the DTE equipment is set for asynchronous operation before at-
tempting to make an asynchronous call. Failure to do so causes the call
attempt to fail.
1=Bit Rate
2=Connector Type
3=RTS Options
1=Netw. options
4=CTS Options
1=Asynchronous
2=DTE options
3=CONFIG
5=CD Options
6=DTR Options
7=DSR Options
8=Flow Control
9=Data Format
2=Synchronous
3=Protocol
4=Quick setup
5=Security
6=Remote Config
Figure 6-16
Asynchronous DTE Options Menu Tree
1=Bit Rate
2=Connector Type
3=RTS Options
4=CTS Options
1=Netw. options
2=DTE options
3=Protocol
1=Asynchronous
2=Synchronous
3=CONFIG
5=CD Options
6=DTR Options
7=DSR Options
8=Transmit Clock
4=Quick setup
5=Security
6=Remote Config
Figure 6-17
Synchronous DTE Options Menu Tree
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Chapter 6. Configuration
Bit Rate
The Bit Rate can be set asynchronously for 300, 1200, 2400, 4800,
9600, 19200, 38400, 57600, and 115200 bps.
The Bit Rate can be set synchronously for 2400, 4800, 9600, 19200,
38400, 48000, 56000, 64000, 112000, and 128000 bps.
Connector Type
The ISU 2x64 can provide either an EIA-232, RS-530, or V.35 inter-
face to a user DTE by selecting the desired connector type. The
V.35 interface requires the RS-530/232-to-V.35 adapter, part num-
ber 1200072L1.
RTS Options
1 ms delay causes the Clear to Send signal to change state one
millisecond after the DTE Request to Send signal changes state.
The 18 ms delay causes the Clear to Send signal to change state
18 milliseconds after the DTE Request to Send signal changes
state.
CTS Options
CD Options
Forced CTS causes the CTS signal on the DTE connector to be
continually asserted. Follows RTS causes the CTS signal to fol-
low the state of the RTS lead.
CD Forced On causes the carrier detect (CD) signal to always be
asserted. Normal causes the CD signal to be asserted when a call
has been successfully established. Off with LOCD (local discon-
nect) causes the CD signal to be disasserted for a period of 5 sec-
onds and then be reasserted at the termination of a call. Off Link
Down causes the CD signal to be disasserted when the ISDN
interface is not ready.
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Chapter 6. Configuration
DTR Options
Ignore DTR causes the ISU 2x64 to disregard the state of the data
terminal ready (DTR) pin. Cmd when Off forces the unit into the
AT command processor mode when DTR is not asserted. To
return online, DTR must be asserted, followed by the AT0 com-
mand. Idle when Off forces the unit to end the current call when
DTR is no longer asserted. Off>On dial #0allows one call
attempt to be automatically established when the DTR signal
goes from inactive to active. While DTR is active, front panel
dialing is also possible. When DTR goes inactive, any outgoing
call present is disconnected. Off>On dial #0uses the phone
number in stored number register 0 to establish the call. To store
a number for automatic dialing, see the section Front Panel Dialing
Options. Dial #0 if Onallows calls to be automatically estab-
lished when the signal is in the active state. The unit attempts to
establish a call using SN0 until the call is established or DTR goes
inactive. Answer if On only allows the unit to answer an incom-
ing call if DTR is asserted.
DSR Options
DSR forced on causes the data set ready (DSR) signal on the DTE
connector to always be asserted. Off Idle+Test causes the DSR to
be disasserted if the ISU 2x64 is in test or there is not an active
call. Off Link Down causes the DSR signal to be disasserted
when the ISDN interface is not ready.
Flow Control (asynchronous data format)
Selecting Hardware Flow (see Figure 6-18) allows the ISU 2x64
received data to be presented to the DTE interface only when RTS
(request to send) is asserted and allows DTE transmit data to be
presented to the 2x64 when CTS is asserted. Software Flow con-
trol uses XON/XOFF inband to control data transferred between
the DTE and the ISU 2x64. Selecting No Flow Ctrl disables flow
control. Either Hardware of Software flow control should be used
when asynchronous BONDING or DTE rates higher than the
effective loop rate are used (i.e., 115.2 kbps over 112 kbps loop
rate).
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Chapter 6. Configuration
1=Bit Rate
2=Connector Type
3=RTS Options
4=CTS Options
5=CD Options
1=Netw. options
2=DTE options
3=Protocol
1=Asynchronous
3=CONFIG
2=Synchronous
6=DTR Options
7=DSR Options
8=Flow Control
9=Data Format
4=Quick setup
5=Security
1=Hardware Flow
2=Software Flow
3=No Flow Ctrl
6=Remote Config
Figure 6-18
Flow Control Menu Tree
Data Format (asynchronous)
A frame consists of a start bit, 7 or 8 Data bits, 0 or 1 Parity bit,
and 1 to 2 Stop bits. The settings for Data Bits, Parity Bits, and
Stop Bits are available as shown in Figure 6-19.
1=Bit Rate
2=Connector Type
3=RTS Options
1=Netw. options
1=8 Data bits
2=7 Data bits
4=CTS Options
5=CD Options
6=DTR Options
7=DSR Options
8=Flow Control
9=Data Format
1=Asynchronous
1=Data Bits
2=Parity Bits
3=Stop Bits
2=DTE options
3=Protocol
3=CONFIG
2=Synchronous
1=None
2=Odd
3=Even
4=Quick setup
5=Security
6=Remote Config
1=1 Stop bit
2=1.5 Stop bits
3=2 Stop bits
Figure 6-19
Data Format Menu Tree
Transmit Clock (synchronous data format)
Selecting the Normal option causes the ISU 2x64 to be the syn-
chronous DTE interface transmit timing source. Transmit data is
timed from the transmit clock provided by the ISU 2x64. With
the External option selected, the ISU 2x64 slaves to an external
transmit timing source. The external clock is provided to the ISU
2x64 by the external transmit clock signal at the DTE connector.
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Chapter 6. Configuration
This signal is echoed by the ISU 2x64 to the transmit clock signal
on the DTE connector. See Figure 6-20 for the menu tree.
1=Bit Rate
2=Connector Type
3=RTS Options
1=Netw. options
4=CTS Options
5=CD Options
1=Asynchronous
2=DTE options
3=Protocol
3=CONFIG
2=Synchronous
6=DTR Options
7=DSR Options
8=Transmit Clock
4=Quick setup
5=Security
1=Normal
2=External
6=Remote Config
Figure 6-20
Transmit Clock Menu Tree
Autobaud
The ISU 2x64 has a DTE rate adjustment feature (autobaud)
which automatically adjusts the bit rate on the DTE port connec-
tor to match that of the connected terminal. For any terminal rate
from 300 bps through 115.2 kbps, type AT and a carriage return.
The ISU 2x64 will adjust to that rate. The DTE port must be set for
AT commands under Dial Options for autobaud to become acti-
vated on a port .
The autobaud feature is only allowed to be active on one DTE
port at a time. If both DTE#1 and DTE#2 are set for AT com-
mands (under Dial Options), then autobaud will be active on
DTE#2 only. To make autobaud active on DTE#1, change the Dial
Options on DTE#2 from AT commands to some other available
dialing option.
When autobaud is not active on a DTE port, the asynchronous
rate of the DTE port matches the rate programmed into the ISU
2x64 at the current time. While autobaud is running on a port,
that port meets Microsoft Windows® 95 Plug-and-Play specifica-
tions. The file MDMADTN.INF is required. To obtain this file,
contact ADTRAN Technical Support as shown on the inside back
cover of this manual.
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Chapter 6. Configuration
Setting Protocol Options
The ISU 2x64 communicates with many different types of tele-
communication equipment including other ISU 2x64s, ISDN ter-
minal adapters, Switched 56 DSUs, and BONDING-compatible
inverse multiplexers. Communicating between such diverse
types of equipment requires various rate adaptation protocols to
support various bit rates and DTE settings. See Figure 6-21 for
the menu tree. The ISU 2x64 supports the following rate adapta-
tion protocols:
•
•
Clear Channel (no rate adaptation protocol) (synch. only)
BONDING mode 1 (Bandwidth on Demand Interoperability
Group)
•
•
•
•
•
•
•
CCITT V.120
CCITT V.110
DSU 57.6 ASYNC
T-LINK (Dial DDS DSU/CSU)
SAP (Simple ADTRAN Protocol)
FALLBACK
PPP async-sync
1=Clear Channel
1=Netw. options
2=BONDING mode 1
2=DTE options
3=CONFIG
3=V.120
3=Protocol
4=V.110
4=Quick setup
5=Security
5=DSU 57.6 ASYNC
6=T-LINK
6=Remote Config
7=SAP
8=FALLBACK
9=PPP async-sync
Figure 6-21
Protocol Menu Tree
See Recommended Operating Protocols on page 6 for more informa-
tion on recommended modes of operation.
The desired protocol may be selected with AT commands at the
DTE port or from the ISU 2x64 front panel. A description of pro-
tocols follows.
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Chapter 6. Configuration
Clear Channel
Clear channel provides the entire bearer channel to the DTE with-
out regard to data format or protocol. This provides a rate adap-
tation at or near the ISDN circuit rate. The primary usage for
Clear Channel in dial line mode is 56 kbps and 64 kbps synchro-
nous. It is useful when the DTE performs its own internal syn-
chronous protocol/rate adaptation or the ISU 2x64 is calling a 4-
wire Switched 56 DSU. In the leased line mode, clear channel can
provide synchronous bit rates of 56 kbps, 64 kbps, 112 kbps, and
128 kbps.
BONDING mode 1
The BONDING mode 1 protocol allows the ISU 2x64 to commu-
nicate at bit rates in excess of 64 kbps to a maximum of 128 kbps.
BONDING provides high-speed communication between ISU
2x64s, ISDN TE/TAs, and inverse multiplexing equipment sup-
porting the BONDING protocol. The protocol allows for the use
of both synchronous and asynchronous bit rates. When the ISU
2x64 uses the BONDING mode 1 protocol, it must make two sep-
arate ISDN phone calls to seize control of both ISDN bearer chan-
nels. The protocol corrects any delays existing between the two
bearer channels and presents a single high-speed data channel to
the DTE. For successful high-speed operation, both the near- and
far-end DCE need to be configured to use BONDING mode 1
protocol. BONDING mode 1 protocol negotiation phase has
numerous timers to allow for transmission delays due to satellite
hops, international calls, etc. The timers may be adjusted if neces-
sary by entering into BONDING mode 1 submenu. See Figure 6-
22 for the menu tree.
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Chapter 6. Configuration
1=TXINIT
2=TXFA
1=Clear Channel
2=BONDING mode 1
3=V.120
3=TXADD01
4=TXDEQ
5=TANULL
6=TCID
1=Netw. options
2=DTE options
3=Protocol
3=CONFIG
4=V.110
4=Quick setup
5=Security
5=DSU 57.6 ASYNC
6=T-LINK
7= Async. Rev.
6=Remote Config
7=SAP
8=FALLBACK
9=PPP async-sync
Figure 6-22
Protocol BONDING, Mode 1 Menu Tree
The timers are defined as follows:
TXINIT
This option specifies the length of time the originating endpoint
attempts to detect BONDING negotiation pattern from the
answering endpoint before determining the BONDING call has
failed. In general, this timer value should be left at the factory
default setting of 10 seconds. Select from values of 1, 2, 5, 10
(default), 20, 50, 100, and 200 seconds.
TXFA
This option specifies the length of time both endpoints attempt to
detect the BONDING frame pattern when a call is connected
before determining the BONDING call has failed. This timer
value should be left at the factory default setting of 10 seconds.
However, when interoperating with other manufacturers’
BONDING equipment it may be necessary to lengthen this timer
to match TXADD01. Values of 1, 2, 5, 10 (default), 20, 50, 100, and
200 seconds may be selected.
TXADD01
This option specifies the length of time both endpoints wait for
the additional call to be connected at the end of negotiation
before determining the BONDING call has failed. The factory
default setting of 20 seconds is sufficient for most calls to go
through, although when dialing overseas it may be necessary to
lengthen this timer to allow for slower call routing. Values of 1, 2,
5, 10, 20, 50 (default), 100, and 200 seconds may be selected.
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Chapter 6. Configuration
TXDEQ
This option specifies the length of time both endpoints attempt to
equalize the network delay between the bearer channels before
determining the BONDING call has failed. Values of 1, 2, 5, 10,
20, 50 (default), 100, and 200 seconds may be selected.
TANULL
This option specifies the length of time the answering endpoint
attempts to detect the BONDING negotiation pattern from the
originating endpoint before aborting to clear channel mode. In
general, this timer value should be left at the factory default set-
ting of 10 seconds. However, it may be necessary to shorten this
timer if the DTE equipment connected to the ISU also has timer
constraints for completing non-BONDING parameter negotia-
tion. Values of 1, 2, 5, 10 (default), 20, 50, 100, and 200 seconds
may be selected.
TCID
This option specifies the length of time both endpoints attempt to
negotiate an agreeable value for bearer channels and channel
capacities before determining the BONDING call has failed.
Select from values of 1, 2, 5 (default), 10, 20, 50, 100, and 200 sec-
onds.
Async. Rev.
This option specifies the negotiation revision for asynchronous
BONDING. Rev. 1 specifies multi-vendor compatible negotiation.
Rev. 0 specifies ADTRAN proprietary negotiation. This option
has no effect on synchronous negotiation.
V.120
The V.120 protocol is a CCITT compliant rate adaptation method
providing DTE service between the ISU 2x64 and other V.120
compliant devices at rates less than the 64 kpbs ISDN bearer
channel rate. V.120 supports both synchronous and asynchro-
nous DTE rates. See Recommended Operating Protocols on page 6
for available V.120 rates. Figure 6-21 illustrates the menu path for
selecting V.120.
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Chapter 6. Configuration
V.110
The V.110 protocol is a CCITT compliant rate adaptation method
providing DTE service between the ISU 2x64 Dual Port ISDN Ser-
vice Unit and other V.110 compliant devices. The V.110 protocol
supports both synchronous and asynchronous DTE rates. See the
section Recommended Operating Modes and Table 1-B for available
V.110 rates. Figure 6-21 illustrates the menu path for selecting
V.110.
DSU 57.6 ASYNC
The DSU 57.6 ASYNC protocol allows the ISU 2x64 to communi-
cate asynchronously at 57.6 kbps with ADTRAN 2-and 4-wire
Switched 56 DSU products. In addition, the ISU 2x64 communi-
cates with other ISUs over dial and leased connections using this
protocol. Figure 6-21 illustrates the menu path for selecting DSU
57.6 ASYNC.
T-Link
The T-Link protocol allows the ISU 2x64 to communicate with 2-
wire Switched 56 DataPath DUs. The T-Link protocol performs
two functions:
•
•
It adapts the data rate of sub 64 kbps DTE devices to the 64
kbps bandwidth of the ISDN bearer channel.
For asynchronous and synchronous DTE rates up to 19.2
kbps, T-Link transmits the status of the DCE-DTE EIA leads
to facilitate flow control and maintenance.
In addition to 2-wire Switched 56 DataPath DUs, the ISU 2x64
communicates with any other device using the T-Link protocol.
Figure 6-21 illustrates the menu path for selecting T-Link.
SAP
The Simple ADTRAN Protocol (SAP) is a rate adaptation method
which provides DTE service between ISU 2x64 units at a channel
rate lower than the 64 kbps ISDN bearer. Selecting this menu
item causes the ISU 2x64 to use SAP protocol.
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Chapter 6. Configuration
The primary usage for SAP is general purpose asynchronous rate
adaptation in a dial-up or leased environment. SAP only oper-
ates on a 64 kbps data link. Figure 6-21 illustrates the menu path
for selecting SAP.
FALLBACK
The FALLBACK asynchronous rate adaptation protocol provides
the capability to automatically establish calls with other ISDN
terminal adapters and Switched 56 DSUs, as well as other ISUs
using a single configuration. The ISU 2x64 must be optioned as
follows for FALLBACK operation:
1. Any asynchronous bit rate up to 115.2 kbps which is support-
ed by the DTE.
2. Flow control must be enabled and supported by the DTE.
FALLBACK supports the following protocols based on the Call
Type: BONDING mode 1, V.120, and T-Link. Figure 6-21 illus-
trates the menu path for selecting FALLBACK.
When answering calls, the ISU 2x64 uses the incoming call type
to determine which rate adaptation protocols to support.
Table 6-A
Rate Adaptation Protocols
Rate Adaption Protocols
Typical Units Supported
Supported
Call Type
Data 64 k
Bonding mode 1
V.120
ISUs
ISDN TAs
PPP async-sync
PPP compatible bridges/routers
Data 56 k
BONDING mode 1
V.120
ISUs
ISDN TAs
PPP async-sync
T-Link
PPP compatible bridges/routers
2-wire Switched 56 DSUs
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Chapter 6. Configuration
When originating calls to unknown units, the ISU begins its pro-
tocol selection based on its local Call Type. (Data 64k is used for
FALLBACK when selected from the Quick Setup menu.) Upon
connection at 64k Call Type, BONDING, V.120, and PPP are
attempted. If connection is not made at 64k, the ISU attempts
another call at 56k Call Type. If the protocol cannot be negoti-
ated, the ISU hangs up the call.
Point-to-Point (PPP) Async-to-Sync
PPP provides a standard method for transporting multi-protocol
datagrams over point-to-point links. The ADTRAN PPP async-
sync protocol allows the ISU 2X64 and a PC or Macintosh® run-
ning PPP software, to communicate with a PPP-compatible
bridge or router. The PPP async-sync protocol complies with
Internet Engineering Task Force (IETF) RFC 1662. The menu path
to select PPP is shown in Figure 6-23.
The asynchronous control character map (ACCM) option is
scanned during the negotiation. When the ACCM option is seen
in a configure ACK link control packet, it is adopted by the ISU
2x64. In addition, when the ACCM option is not seen in the con-
figure-request packet from the network, the ISU 2x64 will add it
to the packet.
1=Clear Channel
1=Netw. options
2=BONDING mode 1
2=DTE options
3=CONFIG
3=V.120
3=Protocol
4=V.110
4=Quick setup
5=Security
5=DSU 57.6 ASYNC
6=T-LINK
6=Remote Config
7=SAP
8=FALLBACK
9=PPP async-sync
1=PPP
2=Multilink PPP
3=PPP w/Comp
Figure 6-23
PPP Menu Tree
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Chapter 6. Configuration
Point-to-Point Protocol (PPP)
The ISU 2x64 can be configured for PPP from the protocol options
of the configuration menu by selecting 1=PPP or by setting S-reg-
ister S27 to a value of 0. The menu path is shown in Figure 6-23.
Multilink PPP
The ISU 2x64 can be configured for multilink PPP from the proto-
col options of the configuration menu by selecting 2= Multilink
PPP or by setting S-register S27 to a value of 1. (See Figure 6-23.)
In this mode, the ISU 2x64 dials a second number to establish a
second point-to-point link. Once the second PPP is established,
multilink PPP is performed over both B-channels.
The phone number for the second call should be placed in stored
number 1 (SN1). If no number is stored in SN1, the same phone
number is dialed to establish the second link.
PPP with Compression
The ISU 2x64 can be configured for PPP with compression from
the protocol options of the configuration menu by selecting
3=PPP w/Comp or by setting S-register S27 to a value of 2. The
menu path is shown in Figure 6-23.
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Chapter 7
Dial Options
FRONT PANEL DIALING OPTIONS
Selecting 4=DIAL or pressing the #key from the front panel dis-
plays the available dialing options (see Figure 7-2). Access the VT
100 Terminal Dial Options Screen (Figure 7-1) by pressing Ctrl+D
from any screen. The dial options are only available when the
ISU is configured for Dial Line operation (not Leased Line).
Figure 7-1
VT 100 Dial Options Screen
1=Hang up line
2=Dial number
4=DIAL
3=Redial last #
4=Answer Call
5=Dial stored #
6=Store/Review #
Figure 7-2
Dial Menu Tree
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Chapter 7.Dial Options
Hang up line
Terminates current call.
Dial number
Enter and dial a number from the keypad. If an error is made,
press the Down arrow to edit the number. After the number is
entered, press Enter to dial the number and save as stored num-
ber 9 for redialing purposes.
Redial last #
Answer Call
Dial stored #
Redial the last number called (or attempted) from the front panel. This
number is saved as stored number 9 from the last attempted phone call.
Selectively answer incoming calls when Auto answer is configured for
disable. (Auto answer is described in the section Setting Auto Answer.)
Dial one of ten stored phone numbers. The Up and Down arrows
permit viewing/selection of a stored number. Press Enter to dial
number and save as stored number 9 (SN9) for redial purposes.
Store/Review #
Enter and review stored numbers. Press the Up and Down
arrows to scroll through the 10 stored numbers (SN0 - SN9). To
store a number, scroll to the desired stored number location, enter
the number to be stored, and press Enter to save the number. If
an error is made, use the Up and Down arrows to edit the num-
ber. Press Enter to save the number and exit. Press Cancel to exit
without changing the number.
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Chapter 8
Quick Setup
QUICK SETUP CONFIGURATION
To configure the DTE Options quickly and easily, the Quick Set-
up menu is available to automatically set up the nine most com-
mon DTE configurations. (See Figure 8-1.) For fine-tuning a
particular application and DTE settings, see DTE Options for Asyn-
chronous and Synchronous Operation on page 50 for step-by-step
procedures for detailed configuration of the DTE Options.
1=Dial 56K sync
1=Netw. options
2=Dial 64K sync
2=DTE options
3=CONFIG
3=Dial 112K sync
4=Dial 128K sync
5=Dial 57.6 asyn
6=Dial 115.2 asy
7=Fallback 57.6k
8=Leased 64K
3=Protocol
4=Quick setup
5=Security
6=Remote Config
9=Ldm 64K Master
Figure 8-1
Quick Setup Menu Tree
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Chapter 8. Quick Setup
Quick Setup
To aid in configuring the ISU 2x64, nine common configurations
are preset for Quick Setup. These include:
•
Synchronous dial operation for 56, 64, 112, and 128 kbps
Asynchronous dial operation for 57.6 and 15.2 kbps
64 kbps Limited Distance Modem using Master clocking
64 kbps leased service
•
•
•
•
Fallback 57.6
If indicated with an asterisk, the option requires the end user to configure
the ISDN switch type, SPID1-LDN1 and SPID2-LDN2. See the section
Setting the Dial Options.
Dial 56K sync*
When the ISU 2x64 is configured for Dial 56 Sync service, the fol-
lowing parameters are automatically preset:
Service type ............................................................ISDN dial line
Automatic answering.......................................................Enabled
ISDN call type...........................................................56 kbps data
Data protocol..........................................................Clear Channel
DTE mode.................................................................Synchronous
DTE connector bit rate......................................................56 kbps
DTE flow control ................................................................... none
RTS line .........................................................................1 mS delay
CTS line.......................................................................... Forced on
Transmit data clock....................................Normal clock source
V.54 Loopbacks.............................................................. Accepted
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Chapter 8. Quick Setup
Dial 64K sync*
When the ISU 2x64 is configured for Dial 64K sync service, the fol-
lowing parameters are automatically preset:
Service type ............................................................ ISDN dial line
Automatic answering ......................................................Enabled
ISDN call type...........................................................64 kbps data
Data protocol..........................................................Clear Channel
DTE mode................................................................. Synchronous
DTE connector bit rate......................................................64 kbps
DTE flow control ................................................................... none
RTS line.........................................................................1 mS delay
CTS line...........................................................................Forced on
Transmit data clock....................................Normal clock source
V.54 Loopbacks...............................................................Accepted
Dial 112K sync*
When the ISU 2x64 is configured for Dial 112K sync service, the
following parameters are automatically preset:
Service type ............................................................ ISDN dial line
Automatic answering ......................................................Enabled
ISDN call type...........................................................56 kbps data
Data protocol................................................. BONDING mode 1
DTE mode................................................................. Synchronous
DTE connector bit rate....................................................112 kbps
DTE flow control ................................................................... none
RTS line.........................................................................1 mS delay
CTS line..........................................................................Forced On
Transmit data clock....................................Internal clock source
BONDING timer TXINIT........................................... 10 seconds
BONDING timer TXFA.............................................. 10 seconds
BONDING timer TXADD01...................................... 50 seconds
BONDING timer TXDEQ........................................... 50 seconds
BONDING timer TANULL........................................ 10 seconds
BONDING timer TCID................................................. 5 seconds
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Chapter 8. Quick Setup
Dial 128K sync*
When the ISU 2x64 is configured for Dial 128K sync service, the
following parameters are automatically preset:
Service type ............................................................ISDN dial line
Automatic answering.......................................................Enabled
ISDN call type...........................................................64 kbps data
Data protocol................................................. BONDING mode 1
DTE mode.................................................................Synchronous
DTE connector bit rate....................................................128 kbps
DTE flow control .................................................................. none
RTS line .........................................................................1 mS delay
CTS line..........................................................................Forced On
Transmit data clock................................... Internal clock source
BONDING timer TXINIT........................................... 10 seconds
BONDING timer TXFA .............................................. 10 seconds
BONDING timer TXADD01 ...................................... 50 seconds
BONDING timer TXDEQ........................................... 50 seconds
BONDING timer TANULL........................................ 10 seconds
BONDING timer TCID................................................. 5 seconds
Dial 57.6 asyn*
When the ISU 2x64 is configured for Dial 57.6 asyn service, the fol-
lowing parameters are automatically preset.
Service type ........................................................... ISDN Dial line
ISDN call type...........................................................64 kbps data
Data Protocol......................................................................... V.120
DTE mode.............................................................. Asynchronous
Data Bits......................................................................................... 8
Parity Bits................................................................................ none
Stop Bits ......................................................................................... 1
DTE connector bit rate...................................................57.6 kbps
DTE flow control ................................................................... none
RTS line .........................................................................1 mS delay
CTS line..........................................................................Forced On
Dialing Mode .......................................................AT Commands
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Chapter 8. Quick Setup
Dial 115.2 asyn*
When the ISU 2x64 is configured for Dial 115.2 asyn service, the
following parameters are automatically preset:
Service type ............................................................ ISDN dial line
ISDN call type...........................................................64 kbps data
Protocol.......................................................... BONDING mode 1
DTE mode.............................................................. Asynchronous
Data Bits......................................................................................... 8
Parity Bits ................................................................................none
Stop Bits ......................................................................................... 1
DTE connector bit rate.................................................115.2 kbps
DTE flow control ....................................................................none
RTS line.........................................................................1 mS delay
CTS line..........................................................................Forced On
Dialing Mode ....................................................... AT Commands
Fallback 57.6k*
When the ISU 2x64 is configured for FALLBACK 57.6K service,
the following parameters are automatically set:
Service type ...................................................................... Dial line
Automatic answering ..............................................................Yes
ISDN type..................................................................64 kbps data
Data protocol.....................................................................Fallback
DTE mode.............................................................. Asynchronous
Data bits......................................................................................... 8
Parity bits.................................................................................none
Stop bits ......................................................................................... 1
DTE connector rate.........................................................57.6 kbps
DTE flow control .......................................................... Hardware
RTS line.........................................................................1 mS delay
CTS line...................................................................... Follows RTS
Dialing Mode ....................................................... AT Commands
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Chapter 8. Quick Setup
Leased 64K
When the ISU 2x64 is configured for Leased 64K service, the fol-
lowing parameters are automatically preset:
Service type ................................................................Leased Line
Network clock source ...........................................................Slave
Channel rate ............................................................................. 64K
Data Protocol..........................................................Clear Channel
DDS loopbacks enabled...........................................................Yes
DTE mode.................................................................Synchronous
DTE connector bit rate......................................................64 kbps
DTE flow control ................................................................... none
RTS line .........................................................................1 mS delay
CTS line..........................................................................Forced On
Transmit data clock....................................Normal clock source
Ldm 64K Master
When the ISU 2x64 is configured for a point-to-point application,
such as a Limited Distance Modem arrangement, the Ldm 64K
Master option automatically presets the following parameters:
Service type ................................................................Leased Line
Network clock source ........................................................Master
Channel rate ............................................................................. 64K
Data Protocol..........................................................Clear Channel
DDS loopbacks enabled...........................................................Yes
DTE mode.................................................................Synchronous
DTE connector bit rate......................................................64 kbps
DTE flow control ................................................................... none
RTS line .........................................................................1 mS delay
CTS line..........................................................................Forced On
Transmit data clock....................................Normal clock source
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Chapter 8. Quick Setup
Factory Setup
To restore the ISU 2x64 to the factory default setup, power the unit
off and perform the following steps:
1. While pressing 0, power the unit on.
2. Continue pressing 0 until the front panel displays the top of
the menu tree. 1=STATUS will be blinking.
Factory default erases all stored phone numbers, SPIDs, and
LDNs, and sets parameters as follows:
Service type ............................................................ ISDN dial line
ISDN switch type .......................................................AT&T 5ESS
ISDN call type...........................................................64 kbps data
Dialing Mode ..............................................................Front Panel
Data protocol..........................................................Clear Channel
DTE connector bit rate......................................................64 kbps
DTE flow control ................................................................... none
RTS line......................................................................... 1 ms delay
CTS line........................................................................Forced CTS
CD line ................................................................................Normal
DSR line ..........................................................................Forced on
Transmit Data Clock..................................Normal clock source
BONDING timer TXINIT........................................... 10 seconds
BONDING timer TXFA.............................................. 10 seconds
BONDING timer TXADD01...................................... 10 seconds
BONDING timer TXDEQ........................................... 50 seconds
BONDING timer TANULL........................................ 50 seconds
BONDING timer TXID................................................. 5 seconds
AT Command Escape character.................................................+
AT Command End-of-Line character value........................... 13
AT Command Line Feed character value............................... 10
AT Command Backspace character value................................ 8
RS-366 Dialing Default ...................................5 seconds or EON
Automatic Answering .....................................................Enabled
AT Command Guard time.............................................1 second
AT Command Miscellaneous Bits (S register 14) .................. 10
AT Command MSG Bits (S register 22)................................... 16
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Chapter 8. Quick Setup
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Chapter 9
Security and Remote Configuration
SECURITY
The ISU 2x64 provides a front panel keypad locking feature to pre-
vent tampering with configuration settings. The feature requires
a password to access menus below the top Current-Status menu
level. The menu options are shown in Figure 9-1.
1=Netw. options
2=DTE options
3=CONFIG
3=Protocol
4=Quick setup
5=Security
1=Set Password
2=Lock Keypad
Password <
>
6=Remote Config
Password Required
Figure 9-1
Security Menu Tree
When the front panel keypad is locked, only the top menu is avail-
able on the LCD display. The LCD can be toggled between DTE1
and DTE2 current status displays with the cursor keys. Any key
other than a cursor key prompts the user for a password. If the en-
tered password matches the stored password, the LCD displays a
brief message indicating that the front panel is active and the con-
figuration menus will be displayed as normal. After configura-
tion is complete, the users must re-enable front panel locking by
selecting 2=Lock Keypad in the Security menu. If the entered
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Chapter 9. Security and Remote Configuration
password does not match the stored password, the LCD displays
a brief message indicating that the entered password was invalid
and the top menu is displayed.
Set Password
Lock Keypad
Set Password prompts the user to enter a numeric code that will
be required for access to configuration menus from the front pan-
el. The code can be up to six digits long. The default state is noth-
ing entered in the password option.
Lock Keypad locks the front panel keypad and displays a brief
message on the LCD indicating that the front panel is locked. The
top menu is displayed after the message.
REMOTE CONFIG
Remote Config (configuration) allows an ISU to be configured or
tested over the ISDN line. A special call is made that places the an-
swer unit in remote loopback for configuration or testing. The
menu options are shown in Figure 9-2.
1=Netw. options
2=DTE options
3=CONFIG
1=Number <
1=Cfg. Rmt. Unit 2=Password <
2=Set Password Password <
>
>
3=Protocol
>
4=Quick setup
5=Security
3=Lpbk remote 1B Number <
4=Lpbk remote 2B Number <
>
6=Remote Config
>
Figure 9-2
Remote Config Menu Tree
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Chapter 9. Security and Remote Configuration
Cfg. Rmt. Unit
Cfg. Rmt. Unit causes the ISU 2x64 to place a call to a remote ISU
for configuration. The user is prompted for the number to dial
and the password for accessing the remote unit. After the call is
placed, the local unit sends the entered password to the remote
unit. If the password is correct, the remote unit confirms the pass-
word and configuration is allowed. If the remote unit has no pass-
word defined, press Enter at the prompt.
Set Password
Set Password prompts the user to enter a six digit numeric code
that musts be supplied when a remote configuration call is re-
ceived. This password is the same as the password for front panel
keypad locking. The default state is nothing entered in the pass-
word option.
Lpbk remote 1B
Lpbk remote 1B causes the ISU 2x64 to make a call to a remote ISU
and place the remote ISU into a 1B-channel loopback. When the
remoted unit is looped back, the local unit will send a test pattern
(2047) to the remote unit and verify that the test pattern comes
back uncorrupted. The user is prompted for the number to dial.
Negotiation progress is displayed while the loopback call is in
progress. Total bytes and Error bytes are displayed upon connec-
tion success. The Cancel key disconnects the call at any time.
Lpbk remote 2B
Lpbk remote 2B causes the ISU 2x64 to make a call to a remote ISU
and place the remote ISU into a 2B-channel loopback. When the
remoted unit is looped back, the local unit will send a test pattern
(2047) to the remote unit and verify that the test pattern comes
back uncorrupted. The user is prompted for the number to dial.
Negotiation progress is displayed while the loopback call is in
progress. Total bytes and Error bytes are displayed upon connec-
tion success. The Cancel key disconnects the call at any time.
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Chapter 9. Security and Remote Configuration
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Chapter 10
Troubleshooting
When the ISU 2x64 powers up, it performs an internal self test that
takes approximately 10 seconds. At the end of the test, the front
panel momentarily displays Self Test Passed.
If Self Test Fails
If Self Test Passed is not displayed, the following steps will verify
whether or not the problem can be fixed locally:
1. Ensure the ISU 2x64 is receiving power.
2. Turn off the ISU 2x64 while holding down 0, then power back
on.
3. Continue to press down 0 for 15 seconds. This resets all the
internal settings to factory defaults.
4. If the ISU 2x64 still does not pass self test, call ADTRAN
Technical Support for assistance; see the back of this manual
for phone numbers.
If The ISU 2x64 Does Not Read Ready
When the ISU 2x64 has been set up and connected to a line, but the
front panel does not read Ready after a few minutes, use the fol-
lowing troubleshooting procedure:
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Chapter 10. Troubleshooting
If the Euro ISDN or VN4 switch type is selected, the unit will not enter
the Ready state until a setup message is sent or received (part number
1200051L5 and 1200051L6).
1. Cycle power on the ISU 2x64, leaving it off for a minimum of
2 seconds. Turn the power on for one full minute to ensure
the unit does not read Ready.
2. Disconnect the ISDN line from ISU 2x64. From a functioning
voice phone, call the local directory number(s) provided with
the line. Calling a good ISDN line with nothing connected
usually results in a ring or fast busy tone. If someone an-
swers or you get a not-in-service intercept, there is probably
something wrong with the translation of the line. The phone
service provider should be able to help.
3. If the ISU 2x64 continues to display Link Down, there is a
physical problem with the phone line (more than likely, a
problem with the layer 1 setup). The problem is in one or
more of the following places:
•
•
•
•
•
•
The ISU 2x64 software setup
The ISU 2x64 hardware
The wiring on your premises
The telephone service provider’s wiring
The telephone service provider’s hardware
The telephone service provider’s software setup
To isolate the problem, perform the following procedure:
A. Ensure the ISDN line is plugged into the ISU 2x64 con-
nector marked ISDN IFC on the back of the ISU 2x64.
B. Ensure the ISU 2x64 is configured for dial line service.
C. Try another piece of functioning ISDN equipment on
the line.
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Chapter 10. Troubleshooting
D. Talk to the service provider and ensure you have an
ISDN Basic Rate U-Interface with 2B1Q line coding
(wrong options are an S or T interface or AMI line cod-
ing) when using ISU 2x64 part number 1200051L1 or
1200051L3. If your ISDN line is extended from a PBX
with an S/T line card, make sure you are using ISU 2x64
part number 1200051L2, 1200051L4, 1200051L5, or
1200051L6.
E. Ensure that the phone line is connected to the actual
telephone line or PBX provided by your telephone com-
pany. If using ISU 2x64 part number 1200051L1 or
1200051L3 with the U-interface, make sure your line is
not connected through another piece of equipment such
as an NT1 in a wiring closet somewhere.
F.
Ensure nothing else is bridged across the ISDN line
pair.
G. With a minimum of extra wiring, try connecting to the
ISDN line pair at the point where service provider’s
wiring ends.
H. With the ISU 2x64 connected to the ISDN line and pow-
ered up, talk to your service provider’s repair group
and inform them that your ISDN basic rate line has a
physical layer 1 problem. Ask them to check the line. If
using the ISU 2x64 1200051L1 or 1200051L3 with the U-
interface, tell them that you have an NT1-like device at
the end of the ISDN line.
4. If the ISU 2x64 continuously reads Getting TEI #1, the ISU
2x64 is physically connected to the local telephone service
provider but is unable to establish logical layer 2. The prob-
lem is in one or more of the following places:
•
•
•
The ISU 2x64 software setup
The telephone service provider’s software setup
Hardware configuration, if the line is extended from the
switch
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Chapter 10. Troubleshooting
To isolate the problem, use the following procedure:
A. Ensure the ISU 2x64 is set up for the correct switch type.
B. Ensure the quality of the line is satisfactory by checking
for near- and far-end block errors (NEBEs and FEBEs).
If the counts are non-zero, there may be a physical link
problem as described under Link Down (Step 3).
C. Try another piece of functioning ISDN equipment on
the ISDN line.
D. With the ISU 2x64 connected to the ISDN line and pow-
ered up, talk to the service provider’s repair group and
tell them you have an ISDN basic rate line that appears
physically okay but has no terminal endpoint identifier
(TEI). Ask them to check the line translation and ensure
that the line supports dynamic TEI allocation. If using
the ISU 2x64 part number 1200051L1 or 1200051L3 with
the U-interface, tell them that you have an NT1 and ter-
minal adapter device connected to the line.
5. If the ISU 2x64 continuously reads Register SPID #1,the ISU
2x64 is physically connected to the local telephone service
provider and has established logical layer 2. The ISU 2x64 is
unable to establish layer 3. The problem is in one or both of
the following places:
•
•
The ISU 2x64 software setup
The telephone service provider’s software setup
To isolate the problem, perform the following procedure:
A. Ensure the ISU 2x64 is set up for the correct switch type.
B. Ensure the ISDN line is multipoint.
C. Ensure that the ISU 2x64 is set up with the correct
SPIDs and LDNs.
D. Try another piece of functioning ISDN equipment on
the ISDN line.
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Chapter 10. Troubleshooting
E. With the ISU 2x64 connected to the ISDN line and pow-
ered up, talk to the service provider’s repair group and
tell them you have an ISDN basic rate line that appears
physically okay but is unable to register its SPID(s).
Ask them to check the line translation, ensure that the
ISDN line supports dynamic TEI allocation, and verify
the SPID(s). If using the ISU 2x64 part number
1200051L1 or 1200051L3 with the U-interface, tell them
that you have an NT1 and terminal adapter device con-
nected to the line.
6. If the ISU 2x64 continuously reads Getting TEI #2, the ISU
2x64 has completely initialized the first phone number but is
unable to establish logical layer 2 for the second phone num-
ber. The problem is in one or both of the following places:
•
•
The ISU 2x64 software setup
The telephone service provider’s software setup
To isolate the problem, perform the following procedure:
A. Ensure the ISDN line is multipoint with two phone
numbers.
B. Ensure that the ISU 2x64 is set up with the correct SPIDs
and LDNs.
C. Try swapping SPID1 with SPID2 and LDN1 with
LDN2. Determine if the problem is the second phone
number or the quantity of phone numbers.
D. Try another piece of functioning ISDN equipment on
the ISDN line.
E. With the ISU 2x64 connected to the ISDN line and pow-
ered up, talk to the service provider’s repair group and tell
them you have an ISDN basic rate line that appears phys-
ically okay but has no terminal endpoint identifier (TEI).
Ask them to check the line translation and ensure that the
ISDN line supports dynamic TEI allocation. If using the
ISU 2x64 part number 1200051L1 or 1200051L3 with the U-
interface, tell them that you have an NT1 and terminal
adapter device connected to the line.
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Chapter 10. Troubleshooting
7. If the ISU 2x64 continuously reads Register SPID #2,the ISU
2x64 has completely initialized the first phone number but is
unable to establish logical layer 3 for the second phone num-
ber. The problem is in one or more of the following places:
•
•
The ISU 2x64 software setup
The telephone service provider’s software setup
To isolate the problem, perform the following procedure:
A. Ensure the ISDN line is multipoint with two phone
numbers.
B. Ensure that the ISU 2x64 is set up with the correct SPIDs
and LDNs.
C. Try swapping SPID1 with SPID2 and LDN1 with
LDN2. Determine if the problem is the second phone
number or the quantity of phone numbers.
D. Try another piece of functioning ISDN equipment on
the ISDN line.
E. With the ISU 2x64 connected to the ISDN line and pow-
ered up, talk to the service provider’s repair group and
tell them you have an ISDN basic rate line that appears
physically okay but is unable to register its SPID(s).
Ask them to check the line translation, ensure that the
ISDN line supports dynamic TEI allocation, and verify
the SPID(s). If using the ISU 2x64 part number
1200051L1 or 1200051L3 with the U-interface, tell them
that you have an NT1 and terminal adapter device con-
nected to the line.
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Chapter 10. Troubleshooting
If the Wrong DTE Port Answers a Call
A common mistake that can easily be made is entering the SPID/
LDN pair swapped between the two DTE ports. For example,
your telephone company has given you two SPID/LDN numbers
as follows:
SPID1 - 201555701111 LDN1 - 5557011
SPID2 - 201555702222 LDN2 - 5557022
If you were to enter the pairs for DTE#1 as SPID1/LDN2 and
SPID2/LDN1, the ISU 2x64 would get confused during incoming
calls because the SPID/LDN pair does not match. Be sure to enter
the SPID/LDN pairs for each DTE# as follows:
Enter SPID dte1
201555701111
Enter LDN dte1
5557011
Enter SPID dte2
201555702222
Enter LDN dte2
5557022
Proper entry of the SPID/LDN pair is crucial to proper operation of the
ISU 2x64.
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Chapter 10. Troubleshooting
If you Cannot Connect Calls
See Table 10-A for corrective actions if you cannot place calls.
Table 10-A
Troubleshooting Calls
Condition
Corrective Action
The ISU 2x64 reads Ready but
calls cannot be placed.
There is most likely a problem in the software setup (trans-
lation) at the CO switch or the network setup in the ISU
2x64.
Local voice calls can be transmit-
ted, but data calls to the same
exchange cannot.
The ISDN line is probably not set up to support data
calls.
Local data calls go through, but
long distance data calls do not.
Ensure the far end is working. If not already doing so,
place the call explicitly specifying the prefix of the long
distance service (for example, 10288 for AT&T). If this
does not work, then most likely the problem is the long
distance service provider. Another possibility is that the
local service provider is not providing long distance
access.
Data calls can be made, but
BONDED data calls cannot.
There is most likely a problem in the software setup (trans-
lation) at the CO switch or the network setup in the ISU
2x64.
Another possibility is that the data circuits provided are
not good enough to support the BONDING negotiation
process.
If the line has two phone numbers, make sure the second
SPID and LDN are entered correctly in SPID2 and LDN2
in the ISU 2x64.
Check with the local service provider to ensure that the
line supports two data calls. The ISU 2x64 status log
buffer shows the sequence of events that occurred. You
need to know which piece of equipment first caused the
BONDING process to terminate. The status logs from
both ends may be necessary to determine this.
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Chapter 11
Specifications
Network Interface
•
RJ-45 for ISDN Basic Rate U-Interface, part numbers
1200051L1 and 1200051L3
•
RJ-45 for ISDN Basic Rate S/T Interface, part numbers
1200051L2, 1200051L4, 1200051L5, and 1200051L6.
DTE Interface
•
Two DB-25s, each RS-530/EIA-232 interfaces (V.35 interfaces
available with RS-530-to-V.35 adapters, part number
1200072L1)
Dialing Selections
•
•
•
•
In-band DTE Dialing: V.25 bis or AT commands
Dial Interfaces: Two RS-366 interfaces (DB-25s)
Manual or automatic stored number dialing, DTR Assertion
Front panel manual dialing
Data Rates (Network)
•
64 kbps (1 B channel), 128 kbps (2 B channels)
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Chapter 11. Specifications
Data Rates (DTE)
When using single DTE interface:
•
•
300 bps to 115.2 kbps asynchronous
2400 bps to 128 kbps synchronous
When using dual DTE interfaces:
•
•
300 bps to 57.6 kbps asynchronous on each interface
2400 bps to 64 kbps synchronous on each interface
B Channel Aggregation
•
BONDING Protocol Mode 1. Used for speeds over 64 kbps
from a single DTE interface.
•
RFC 1717 Multilink PPP used for speeds over 57.6 kbps for a
single DTE interface.
Rate Adaptation
•
•
•
•
•
•
•
•
•
•
T-Link
CCITT V.120
CCITT V.110
Clear Channel
SAP
FALLBACK
DSU 57.6 Async
BONDING mode 1
PPP Async-Sync
Multilink PPP
Interoperability
•
BONDING Mode 1-compatible Inverse Multiplexers (AS-
CEND, PROMPTUS, Teleos, etc.)
•
•
Switched-56 DSUs (2-wire and 4-wire), ISU 128s, ISDN TAs
PPP/Multilink compatible devices
Switch Compatibility
•
AT&T 5ESS, NTI DMS-100, National ISDN-1, NEC, Euro IS-
DN*, TDX10*, TDX1B*, KDD*, NTT*, and VN4*.
*Only available on part numbers 1200051L5 and 1200051L6.
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Chapter 11. Specifications
Display
•
•
Two-line by 16-character LCD
LED Indicators:
RS
Request to Send
Indicates the DTE is ready to transmit.
CS Clear to Send
Indicates the ISU 2x64 is ready to transmit.
TD Transmit Data
On when the DTE is transmitting to the ISU 2x64
RD Receive Data
On when the ISU 2x64 is receiving data from thefar-end
CD Carrier Detect
On when the ISU 2x64 is ready to transmit data
TR Data Terminal Ready from DTE
On when DTR is active at the DTE interface
SR
Data Set Ready
Environmental
•
•
•
Operating Temperature: 0 to 50 ˚C
Storage Temperature:-20 to 70 ˚C
Relative Humidity:Up to 95%, non-condensing
Physical
•
2.25" high x 8.75" wide x 11.00" deep, 3 lbs
Power
•
•
•
115 VAC, 60 Hz, 8 W maximum dissipation (part numbers
1200051L1, 1200051L2, and 1200051L5 )
220 VAC, 50 Hz, 10 W maximum dissipation (part numbers
1200051L3 and 1200051L4)
230 VAC, 50Hz, 10 W maximum dissipation (part number
1200051L6)
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Chapter 11. Specifications
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Appendix A
AT Commands
This Appendix lists the supported AT commands and descrip-
tions of their functions. Bold text indicates default settings.
Command
Function
A
Answer. Puts the ISU 2x64 in answer mode.
D
Dial. Precedes the telephone access number [ATD5551212].
Hang up. Disconnects the current call.
On line. Commands the unit to go back on line.
S Register.
H
O
S
SS
Z
S String register.
Reset. Resets the AT command processor.
Save. Save current configuration to EEPROM.
&W
+++
Break in. Break in AT command processor during an active call. The
break in character can be defined in S2.
_U
!S
Reset ISDN interface.
Dump Status Buffer contents to the DTE port.
Power resets unit.
_Z
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Appendix A: AT Commands
Command
Function
Carrier Detect (CD) Control Line Options
&C0
&C1
&C2
&C3
CD forced On
CD normal
CD off with local disconnect (LOCD)
CD off with Link Down
Data Terminal Ready (DTR) Control Line Options
&D0
&D1
&D2
Ignore DTR
DTR Off forces command
Idle when Off, DTR Off forces idle (On allows auto answer)
Generic Unit Configurations
&F0
&F1
&F2
&F3
&F4
&F5
&F6
&F7
&F8
&F11
Resets all S-registers to factory preset values
Configures unit for Dial 56k sync
Configures unit for Dial 64k sync
Configures unit for Dial 112k sync
Configures unit for Dial 128k sync
Configures unit for Leased 64k
Configures unit for Ldm 64k master
Configures unit for Dial 57.6k async
Configures unit for Dial 115.2k async
Configures unit for FALLBACK 57.6k async
Network Options
&L0
&L1
Dial network
Leased network
Calling Number Identification
&N0
&N1
Number 1. Read far-end phone number 1 if service subscribed from
telephone company.
Number 2. Read far-end phone number 2 if service subscribed from
telephone company.
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Appendix A: AT Commands
Command
Function
DTE Data Type Options
&Q0
&Q1
DTE is async
DTE is sync
Clear-To-Send (CTS) Control Line Options
&R0
&R1
Follows RTS
Forced CTS
Data Set Ready (DSR) Control Line Options
&S0
&S1
&S2
DSR forced On
DSR if call up
DSR if link up
DTE Connector Data Synchronous Data Clocking Options
&X0
&X1
Internal transmit clock
External transmit clock
Assigning Stored Numbers for Dialing Options
&Z0
&Z1
&Z2
&Z3
&Z4
&Z5
&Z6
&Z7
&Z8
&Z9
Stored number 0
Stored number 1
Stored number 2
Stored number 3
Stored number 4
Stored number 5
Stored number 6
Stored number 7
Stored number 8
Stored number 9
Local Echo Options
E0
E1
Disable local echo
Enable local echo
Unit Identification
I0
I1
Identify unit. Commands the unit to display model number.
Identify software. Commands the unit to display software version.
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Appendix A: AT Commands
Command
Function
AT Command Response Message Options
Q0
Response messages on
Q1
Response messages off
AT Command Response Message Types
V0
V1
Response messages codes
Response messages words
AT Command Connect Message Options
X0
X1-7
Simple connect message
Connect messages with bit rate
Ready-To-Send (RTS) Control Line Options
_D0
1 mS delay
_D1
18 mS delay
MakeBusy Options
_B0
Make DTE port not busy (same as S135=0).
_B1
Make DTE port busy (same as S135=1).
Service Profile Identification (SPID) Access Options
_I0=
_I1=
Access SPID#1 for DTE #1
Access SPID#2 for DTE #2
Local Directory Number (LDN) Access Options
_N0=
_N1=
Access LDN1 for DTE #1
Access LDN2 for DTE #2
ISDN Switch Type Options
_S0
_S1
_S2
_S3
_S4
_S5
5ESS
DMS-100
National ISDN-1
NEC
Euro ISDN*
VN4*
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Appendix A: AT Commands
Command
Function
ISDN Switch Type Options (continued)
_S6
_S7
_S8
_S9
TDX10*
TDX1B*
KDD*
NTT*
*Only available on part numbers 1200051L5 and 1200051L6.
ISDN U-Interface Operational Mode Options
_X0
ISU timing slaves to network (NT mode)
_X1
ISU is U-interface timing master (LT mode)
Data Flow Control Options
\Q0
\Q1
\Q2
\Q3
No flow control
Software
CTS only
Hardware
Dump Status Buffer
!S
Sends complete log of all messages stored in the StatusBuffer.
VT 100 Terminal Menus
!V
Enables VT 100 compatible menuing system via the DTE connector.
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Appendix A: AT Commands
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Appendix B
Current Status Messages
This appendix lists the status line messages and their definitions.
Messages shown entirely in capital letters are generated by the
ISDN network. Messages with lower case letters are generated by
the ISU 2x64.
AT&T-5ESS Ready
The ISU is connected to an AT&T-5ESS switch and is ready to
place/receive calls.
Call Connect B1
Bearer channel 1 is connected and is active.
Call Connect B2
Bearer channel 2 is connected and is active.
CALL xxxxxxx
The ISU is calling phone number xxxxxxx.
DEACTIVATED
The network interface is not active.
DISCONNECTED
The network has activated layer 1 but layer 2 is inactive. To acti-
vate the unit a setup message must be sent or received.
DISCONNECTING
The current phone call is being disconnected (hung up).
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Appendix B: Current Status Messages
DMS-100 Ready
The ISU is connected to a DMS-100 switch and is ready to place/
receive calls.
Euro ISDN Ready
The ISU 2x64 is connected to a Euro ISDN switch and is ready to
place/receive calls.
Getting TEI #1
The ISU is receiving its first TEI from the network.
Getting TEI #2
The ISU is receiving its second TEI from the network.
ISDN-1 Ready
The ISU is connected to an ISDN-1 compliant switch and is ready
to place/receive calls.
Link down
The network interface is not active.
Link In Sync
The ISU has successfully connected to the network but is waiting
for the switch to issue the ACT bit.
LPBK DTE
The DTE connector is looped back in the DTE direction.
LPBK Netw
The ISU 2x64 is in a customer initiated loopback.
LPBK Protcl.Net
The ISU 2x64 has been commanded to perform a loopback in the
network direction after letting the incoming data pass through the
current protocol.
NEC Ready
The ISU 2x64 is connected to an NEC switch and is ready to place/
receive calls.
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Appendix B: Current Status Messages
NET EOC LOOPBACK
The ISU 2x64 has been commanded to perform an ISDN loopback
toward the network.
NET REM LOOPBACK
The ISU 2x64 is performing a V.54 or DDS latching loopback to-
ward the network.
Ready
The unit is ready to make or accept a call.
Register SPID #1
The ISU 2x64 is registering its first SPID with the network.
Register SPID #2
The ISU 2x64 is registering its second SPID with the network.
RINGING
The phone number just dialed is ringing.
xxxx nnnn
A rate adaptation is running at the bit rate specified by nnnn.
xxxxx Quitting
A rate adaptation protocol is turning off.
xxxxx Ready
A rate adaptation protocol is ready.
xxxxx Setup
A rate adaptation protocol is setting up.
xxxxx can be any of the following:
BONDING
Bandwidth on Demand Interoperability Users Group protocol.
CLEAR CHAN
No rate adaptation protocol (allows use of maximum bandwidth).
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Appendix B: Current Status Messages
DSTOP
DSU 57.6 Async rate adaptation protocol.
DSU57.6
ADTRAN DSU asynchronous protocol.
FALLBACK
FALLBACK rate adaptation protocol.
SAP
Simple Adtran Protocol.
TLINK
TLINK rate adaptation protocol.
V120
V.120 rate adaptation protocol.
V110
V.110 rate adaptation protocol.
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Appendix C
Status Buffer Messages
Messages shown entirely in capital letters are generated by the
ISDN network. Messages with lower case letters are generated by
the ISU 2x64.
Answer 1/2
The ISU answered a call on either the first or second B channel.
The calling phone number is displayed if available.
ACCESS_INFO_DISCARDED
The network was unable to deliver access information to the far-
end.
Back to online
ISU 2x64 went back on line.
Bad async BPS
The BONDING protocol determined that the selected asynchro-
nous bit rate is not supported.
Bad AT bit field
User issued an AT command with an argument that was out of
range.
Bad B channel
Bonding negotiation determined the delay in one of the Bearer
channels was uncorrectable.
Bad call type
ISU 2x64 placed a call with an improper call type.
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Appendix C: Status Buffer Messages
Bad DTE baud
The DTE bit rate does not match a valid bit rate for the protocol se-
lected.
Bad DTE bps
Bonding negotiation determined the chosen DTE bit rate is in-
valid.
BAD_INFO_ELEM
Call control error.
Bad phone number
ISU 2x64 attempted to call an invalid phone number.
Bad TLK Version
Invalid TLINK parameters found during end-to-end negotiations.
Baud Rate
ISU 2x64 does not support the negotiated TLINK baud rate.
BEAR_CAP_NOT_AVAIL
The bearer channel requested by the user is not available.
Bearer mode
Incoming call is not of a type the ISU 2x64 can accept.
Bearer info mode
Incoming call information transfer capability is not known.
BONDING (+/- XXX)
The amount of bytes of corrected delay between the B2 and B1
bearer channels (XXX can range from -8000 to +8128 bytes ).
BPS mismatch
Bonding negotiation found a bit rate mismatch.
Break to AT cmd
User issued a break-in request (+++).
Break ignored
User issued an extra break-in request.
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Appendix C: Status Buffer Messages
BUSY
The called number is busy.
CallID 1 in use
ISU 2x64 tried to place a call using SPID 1 when SPID 1 was al-
ready in use.
CallID 2 in use
ISU 2x64 tried to place a call using SPID 2 when SPID 2 was al-
ready in use.
Call not ringing
User executed an answer command (ATA) but there was not a call
present.
CALL_REJECTED
The call has been rejected by the ISDN network.
Can’t go online
ISU 2x64 cannot go back on line. User issued an unknown AT
command.
CAP_NOT_IMPLEMENTED
The network or far-end does not support the bearer capability re-
quested.
CHAN_DOES_NOT_EXIST
The bearer channel requested is not present.
CHAN_NOT_IMPLEMENTED
The bearer channel requested has not been implemented.
CHANNEL_UNACCEPTABLE
The channel requested has not been subscribed.
CID>0 rcvd
Received an incoming call from a third party during Bonding set-
up with far end.
DEST NOT ISDN
The number called is not ISDN (warning only).
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Appendix C: Status Buffer Messages
DEST_OUT_OF_ORDER
The called number is out of order.
Dial1/2
The ISU 2x64 placed a call on either the first or second channel.
The number called is displayed following the message.
Discon1/2
The call on either the first or second channel was disconnected
from the network. The far-end phone number is displayed if
available.
Disconnect Req
Far-end unit disconnected during BONDING negotiation.
DPUMP END RCVD
Indication of a hang-up or disconnect occurring during BOND-
ING. Does not indicate an error condition has occurred.
DTE must be SYNC
For the protocol chosen, the DTE connector must be optioned as
synchronous.
DTE not set V25
The DTE equipment is not optioned for the same bit rate as the ISU
2x64 for V.25 bis dialing.
DTR not up
ISU 2x64 tried to place a call in a dialing mode that requires DTR
to be in an active state but it is not.
Dump call
ISU 2x64 could not accept an incoming call because it was already
involved in a call.
Dump1/2
An incoming call on either the first or second channel was discard-
ed by the ISU. The calling number is displayed if available.
FACILITY_NOT_IMPLEMENT
The network does not support the requested supplementary ser-
vice.
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Appendix C: Status Buffer Messages
FACILITY_REJECTED
A facility requested cannot be provided by the network.
FACILITY_NOT_SUBSCRIBED
The channel type requested has not been subscribed.
FALLBACK ERROR
Attempt to fallback to normal mode failed.
FBW disconnect
BONDING negotiation has failed due to a disconnect on a B-
Channel.
FlowCtl mismatch
Bonding negotiation determined a flow control mismatch.
FlowCtl required
Bonding negotiation determined that flow control needs to be op-
tioned on.
Hangup1/2
The call on either the first or second channel was disconnected by
the ISU 2x64. The far-end phone number is also displayed.
InCmptblFound
TLINK end-to-end negotiations found an optioning incompatibil-
ity between the two end units.
INCOMMING_CALL_BARRED
The network will not allow an incoming call.
INCOMPATIBLE_DEST
The called number cannot accept the type of call that has been
placed.
INTRWORKING_UNSPEC
A message was sent by a far-end network that was not under-
stood.
INVALID_CALL_REF
Call control error.
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Appendix C: Status Buffer Messages
INVALID_ELEM_CONTENTS
Call control error.
INVALID_MSG_UNSPEC
Invalid message, protocol error.
INVALID_NUMBER_FORMAT
The dialed number has an invalid format.
L1 not up
Call has been attempted while the network interface is not active.
L2 not up
Call has been attempted while the data link layer interface is not
active.
L3 not up
Call has been attempted while the call control interface is not ac-
tive.
L2 #2 not up
Call has been attempted while the data link layer interface for a
second call (BONDING) is not active.
L3 #2 not up
Call has been attempted while the call control layer interface for a
second call (BONDING) is not active.
LDN TOO LONG
The local directory number entered has too many digits.
MANDATORY_IE_LEN_ERR
Mandatory information element length error.
MANDATORY_IE_MISSING
Mandatory information element missing.
Need 2 B chan
The DTE bit rate requires the BONDING protocol.
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Appendix C: Status Buffer Messages
Need 64K call
The BONDING protocol requires the ISU 2x64 to be configured
for a 64kbps data call type.
Negotiation fail
The BONDING negotiation has failed.
NETWORK BUSY
The ISDN switch is busy and unable to process a call.
NETWORK_CONGESTION
The phone network is currently congested.
NETWORK_OUT_OF_ORDER
The phone network is out of order.
No 48K Support
The ISU 2x64 does not support 48 kbps TLINK. Local DTE setup
error.
NO_CIRCUIT_AVAILABLE
The requested bearer channel is not available.
NONEXISTENT_MSG
Nonexistent message was sent by the ISU 2x64.
No Sreg number
Attempt to access an S register without specifying a specific S-reg-
ister (example: ATS=1).
No Sreg value
Attempt to change an S-register without specifying a value (ex-
ample: ATS2= ).
NO_ROUTE
The phone network was unable to find a route to the destination
number.
NO_USER_RESPONDING
The dialed number is not responding.
NORMAL_CLEARING
The network is disconnecting the current call.
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Appendix C: Status Buffer Messages
NOT end2end ISDN
The path that the call was routed over is not ISDN from end-to-
end (warning only).
NUMBER_CHANGED
The number dialed has been changed.
OUTGOING_CALL_BARRED
The network will not allow the outgoing call to be placed.
PROTOCOL_ERROR
Call control error.
REQ_CHANNEL_NOT_AVAIL
The channel type requested is currently not available.
Remote not ISU
Bonding negotiation determined the far-end unit is not another
ISU. (Asynchronous rates can only be supported between two
ADTRAN ISUs when Rev. 0 Bonding Mode 1 is selected. Rev. 1
Bonding Mode 1 will interoperate with other vendor terminal
adapters in asynchronous DTE operation.)
RESP_TO_STAT_ENQ
Response to status inquiry.
Ring 1/2
An incoming call on either the first or second channel entered the
Ring state. The calling phone number is displayed if available.
S cmd not = or ?
User did not use proper syntax.
SAP idle timeout
Unit at far-end is not configured to use the SAP protocol.
SERVICE_NOT_AVAIL
The requested service is not available.
SOURCE NOT ISDN
The incoming calling party is not ISDN (warning only).
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Appendix C: Status Buffer Messages
SReg Set Error
Local DTE invalid S-register setting.
Sync BPS < 56K
The synchronous bit rate selected is too slow for the BONDING
protocol.
Synch Mismatch
Both ends bad synchronization.
TAINIT expired
Bonding timer TAINIT expired.
TANULL expired
Bonding timer TANULL expired, non BONDING equipment at-
tempted to call into the ISU 2x64 while optioned for BONDING.
TEMPORARY_FAILURE
The network has temporarily failed; try the call again.
TIMER_EXPIRY
Call control error.
TLINK ErrorOne
Catastrophic TLINK error.
TXADD01 expired
Bonding timer TXADD01 expired, probably making a long dis-
tance call to a foreign country; adjust timer value to correct.
TXFA1 expired
Bonding timer TXFA1 expired; other vendor's BONDING equip-
ment did not operate properly.
TX FLOW ERROR
Flow control needs to be enabled.
TXFA2 expired
Bonding timer TXFA2 expired; other vendors BONDING equip-
ment did not operate properly.
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Appendix C: Status Buffer Messages
TXINIT expired
Bonding timer TXINIT expired, called non-BONDING equipment
or B channel not error free.
UNASSIGNED_NUMBER
The phone number dialed does not exist.
Unknown AT & cmd
User issued an unknown AT command.
UNSPECIFIED_CAUSE
Received a cause message from the network that is not under-
stood.
Unsupported baud
The ISU 2x64 does not support the negotiated baud rate.
USER_BUSY
The dialed number is busy.
V120 timeout
The far end unit is not set up for V.120 or B channel not error free.
V120 connected
The V.120 rate adaptation successfully connected to the far-end
unit.
WRONG_MESSAGE
Call control error.
WRONG_MSG_FOR_STATE
Call control error.
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Appendix D
S-Register List
Determines how the ISU 2x64 answers an incoming
call.
S0.........AUTO ANSWER
0 = Disable (ISU 2x64 does not answer call)
1 = Enable (ISU 2x64 answers all calls) (default)
2 = Dump all calls
S2.........BREAK IN
CHARACTER
Determines which key or character (in ASCII code)
defines the escape command. The standard escape
character is a + sign (ASCII value of 43 decimal). To
change the character set, set S2 to the desired ASCII
value.
Range = 0 to 127
S3.........END OF LINE
CHARACTER
Determines which key or character (in ASCII code)
ends a command line. The standard end-of-line char-
acter is the carriage return (ASCII value of 13 deci-
mal).
Range = 0 to 127
S4.........LINE FEED
CHARACTER
Determines which key or character (in ASCII code)
advances the cursor to the next line after ending a
command line or after an ISU 2x64 message. The stan-
dard character is the line feed (ASCII value of 10 dec-
imal).
Range = 0 to 127
S5.........BACK SPACE
CHARACTER
Determines which key moves the cursor back one
space to erase a character. The standard character is
the backspace (ASCII value of 8 decimal).
Range = 0 to 127
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Appendix D: S-Register List
S6.........DTR DIAL DELAY
Delay time in minutes between consecutive outgoing
calls when DTR is set for Dial #0 if onoption.
S7.........CONNECT TIME
Determines how long the ISU 2x64 waits for an out-
going call to be answered.
15 = 15 seconds
30 = 30 seconds (default)
60 = 1 minute
120 = 2 minutes
240 = 4 minutes
S9.........CLEAR CHAN DELAY The value multiplied by eight determines the number
of bytes between receive data and transmit data.
S10.......DISABLE REMOTE
CONFIG
Disables the two-second delay at the beginning of
each incoming call that scans for remote configuration
data. FALLBACK protocol cannot be used when this option
is set!
0 = Remote Config enabled
1 = Remote Config disabled
S12.......ESCAPE TIME
S14.......MISC BITS
Determines the delay required immediately before
and after entering the escape command for the ISU
2x64 to recognize and execute the command.
Range = 0 to 127 (default = 1 second)
Miscellaneous bits (bit 8 is most significant bit) .
Bit 2 = 1:enables on screen echo of AT commands.
Bit 2 = 0: disables on screen echo of AT commands.
Bit 3 = 0: enables AT responses from the ISU 2x64.
Bit 3 = 1: disables AT responses from the ISU 2x64.
Bit 4 = 1: enables AT responses to be displayed
in text form.
Bit 4 = 0: enables AT responses to be displayed in nu-
meric form.
S15.........ASYNC BONDING REV Determines the revision level Bonding negotiates
for asynchronous connections.
0 = ADTRAN orginal Async. Bonding
1 = Multivendor Async. Bonding (default)
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Appendix D: S-Register List
S22.......MSG BITS
Miscellaneous message bits (bit 8 is most significant
bit).
Bit 5 = bit 6 = bit 7 = 1 allows connect message with
baud rate.
Bit 5 = bit 6 = bit 7 = 0 connect message without baud
rate.
S23.......MAKE BUSY
Number assigned by the telephone company when
FEATURE BUTTON requested by user. Make Busy option is translated for
NUMBER
an ISDN line and the feature button number must be
entered into this S register. Useful for Hunt-Group
operation.
Range = 0 to 255
0 is default.
S24.......V.120
Value determines whether or not the V.120 bit is set
LOW LAYER COMP. in setup messages for CCITT V.120 calls. Some terminal
adapters require that this bit be set to connect V.120
calls.
0 = Set V.120 bit in call setup message (default)
1 = Do not set V.120 bit in call setup message
S25.......DTR DELAY
Value determines the minimum time a change of state
on DTR must last before the unit responds. The value
is in hundredths of seconds.
Range = 0 to 255
5 is default (50 milliseconds)
S26.......DTE RATE ADJUST
S27.......PPP MODE
Determines CLEAR CHAN protocol automatically re-
ducing DTE RATE for non-64K call types.
0 = CLEAR CHAN changes DTE rate from 64K to
56K for non-64K call types (default).
1 = CLEAR CHAN does not change DTE rate from
64K to 56K for non-64K call types.
Value determines whether PPP will be a single-link or
multilink connection.
0 = Single-link operation (default)
1 = Multi-link operation
2 = Use compression
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Appendix D: S-Register List
S30.......DTE CTS
Controls the operation of the DTE connector CTS line.
0 = Follows RTS
1 = Forced CTS (default)
S31.......DTE RTS
S32.......DTE DSR
Controls operation of the RTS line.
0 = 1 ms delay (default)
17 = 18 ms delay
Controls the operation of the Data Set Ready signal on
the DTE connectors.
0 = Force DSR on always (default)
1 = DSR active only during a call
2 = DSR active only when network interface is on
S33.......DTE CD
Controls the operation of the Carrier Detect line on the
DTE connectors.
0 = Force CD on always
1 = CD is active during a call (default)
2 = LOCD
3 = Off Link Down
S34........DTE DTR
Determines how the ISU 2x64 responds to changes in
DTR.
0 = Ignore DTR (default)
1 = Force AT command mode when DTR is off
2 = Dump incoming call when DTR is off
4 = Hang up incoming call when DTR is off
8 = Hang up outgoing call when DTR is off
40 = Dial #0 if on
60 = Dial/Answer if on
72 = Off on dial #0
S35........DTE CONN
Determines which is the current operating DTE con-
nector.
0 = RS-530 connector (default)
1 = V.35 connector
2 = EIA-232
S40.......BOND TXINIT
Specifies the number of seconds the originating end-
point attempts to detect the BONDING negotiation
pattern from the answering endpoint before deter-
mining the BONDING call has failed.
0 to 256, 10 sec is default
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Appendix D: S-Register List
S41.......BOND TXFA
Specifies the number of seconds both endpoints at-
tempt to detect the BONDING frame pattern when a
call is connected before deciding the BONDING call
has failed. When operating with other manufacturer's
BONDING equipment, it may be necessary to length-
en this timer to match TXADD01.
0 to 256, 10 sec is default
S42.......BOND TXADD01
The number of seconds both endpoints waits for the
additional call to be connected at the end of negotia-
tion before determining the BONDING call has failed.
When dialing overseas it may be necessary to length-
en this timer to allow for lower call routing.
0 to 256, 50 sec is default.
S43.......BOND TXDEQ
S44 ........BOND TANULL
The number of seconds both endpoints attempt to
equalize the network delay between the bearer chan-
nels before determining the BONDING call has failed.
0 to 256, 5 sec is default.
The number of seconds the answering endpoint at-
tempts to detect the BONDING negotiation pattern
from the originating endpoint before aborting to clear
channel mode. It may be necessary to shorten this
timer if the DTE equipment connected to the ISU 2x64
also has timer constraints for completing non-BOND-
ING parameter negotiation.
0 to 256, 10 sec is default.
S45.......BOND TCID
S46.......V25 MODE
The number of seconds both endpoints attempt to ne-
gotiate agreeable values for bearer channels and chan-
nel capacities before determining the BONDING call
has failed.
0 to 256, 5 sec is default.
Selects the type of V.25 bis dialing used.
0 = Asynchronous V.25
1 = HDLC V.25
2 = BISYNC V.25
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Appendix D: S-Register List
S47.......RS 366 TIME
Determines the amount of time the RS-366 port waits
for either EON or inactivity to terminate a dial string
before dialing a number.
0
= Wait for EON only
10 = Wait for 1 second or EON
20 = Wait for 2 seconds or EON
50 = Wait for 5 seconds or EON (default)
100 = Wait for 10 seconds or EON
200 = Wait for 20 seconds or EON
S50.......LINE MODE
Selects the operating mode of the ISU 2x64.
0 = Dial service (switched service) (default)
1 = Leased service (non-switched service)
S51.......LINE CLOCK
S52.......SWITCH TYPE
Selects the clock mode in leased mode.
0 = Slave (default)
1 = Master (Leased line only, LDM application only)
Selects the network switch type for dial service.
0 = AT&T 5ESS (default)
1 = Northern Telecom DMS-100
2 = National ISDN-1
3 = NEC
4 = Euro ISDN*
5 = VN4*
6 = TDX10*
7 = TDX1B*
8 = KDD*
9 = NTT*
*Only available on part numbers 1200051L5 and 1200051L6.
S53.......CALL TYPE
Call type
0 = Speech
1 = Audio
2 = 56 kbps data
3 = 64 kbps data (default)
5 = 128 kbps data
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Appendix D: S-Register List
S54.......PROTOCOL
TYPE
Rate adaptation protocol type.
1 = Clear Channel (no rate adaptation) (default)
2 = BONDING mode 1
3 = SAP (Simple Asynchronous Protocol)
4 = T-link
5 = V.110
6 = V.120
9 = DSU 57.6 kpbs asynchronous
11 = FALLBACK
12 = PPP
S55.......DIAL MODE
S56.......ECHO TONE
Selects dialing interface.
0 = Front panel only (dialing from front panel is al-
ways available) (default)
1 = RS-366 dialing port
2 = AT commands
3 = V.25 bis dialing
Enables an echo tone which suppresses the echo can-
cellers in a voice circuit. Can be used to trick the
switch to allow sending data over a line optioned for
voice ISDN service.
0 = None (default)
1 = Answer
2 = Originate
3 = Both
S57.......DDS TEST
Allows an ISU 2x64 optioned as a leased line unit to
respond to either DDS inband latching loopback and/
or V.54 loopback commands.
0 = No Rem Lpbks
1 = DDS Accepted
2 = V.54 Accepted (default)
3 = DDS + V.54 Accepted
S58.......CALL SCREENING
Allows the ISU 2x64 to screen incoming calls.
0 = Answer any call (default)
1 = Answer only calls from numbers matching
those stored in SN0 through SN9.
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Appendix D: S-Register List
S59.......CHANNEL RATE
Sets the available network bandwidth when the ISU
2x64 is in leased mode.
3 = 64 kbps
5 = 128 kbps
SS60.....SPID1 LOC
SS61.....SPID2 LOC
SS62.....LDN1 LOC
SS63.....LDN2 LOC
S70.......DTE MODE
Primary SPID string location.
Secondary SPID string location.
Primary local directory number string location.
Secondary local directory number string location.
Selects asynchronous or synchronous mode on the
DTE connector.
0 = Asynchronous
1 = Synchronous (default)
S71.......DTE RATE
Selects the DTE connector bit rate.
1 = 300
3 = 1200
6 = 2400
8 = 4800
11 = 9600
15 = 19200
17 = 38400
18 = 48000
19 = 56000
20 = 57600
21 = 64000 (default)
22 = 112000
23 = 115200
24 = 128000
S72.......DATA BITS
S73.......DTE PARITY
Selects the number of asynchronous data bits.
0 = 8 bits (default)
1 = 7 bits
Selects the number of asynchronous parity bits.
0 = None (default)
1 = Odd
2 = Even
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Appendix D: S-Register List
S74.......DTE STOP
S75.......DTE FLOW
Selects the number of asynchronous stop bits. More
than one option can be set at the same time.
0 = 1 stop bit (default)
1 = 1.5 stop bits
2 = 2 stop bits
Selects asynchronous flow control
0 = None (default)
1 = Hardware flow. CTS from DCE controls DTE.
2 = Hardware flow. RTS from DTE controls DCE.
3 = Hardware flow. RTS and CTS flow control.
4 = Software flow. XON/XOFF from DCE controls
DTE.
8 = Software flow. XON/XOFF from DTE controls
DCE.
12 = Software flow. XON/XOFF controls DTE and
DCE.
S76.......DTE CLOCK
S135.....
Selects DTE connector transmit clock timing source.
0 = Internal (ISU 2x64 supplies timing) (default)
1 = External (DTE supplies timing)
Value determines whether or not the ISDN switch
should consider a DTE port busy. S23 must be pro-
grammed before this register is used.
0 = DTE port is not busy (default)
1 = DTE port is busy
The following are the string locations for stored numbers 0 - 9:
SS80.....SN0 LOC
SS81.....SN1 LOC
SS82.....SN2 LOC
SS83.....SN3 LOC
SS84.....SN4 LOC
SS85.....SN5 LOC
SS86.....SN6 LOC
SS87.....SN7 LOC
SS88.....SN8 LOC
SS89.....SN9 LOC
S118 = 0
Stored number 0 string
Stored number 1 string
Stored number 2 string
Stored number 3 string
Stored number 4 string
Stored number 5 string
Stored number 6 string
Stored number 7 string
Stored number 8 string
Stored number 9 string
CHAP Authentication (default)
PAP Authentication (required for MP connection with
WIN 95)
S118 =32
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Appendix D: S-Register List
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Appendix E
Connector Pinouts
PIN 13
PIN 25
PIN 1
FEMALE
PIN 14
Figure E-1
EIA-232 Interface
Table E-A
EIA-232 Interface
Pin
Name
I/O
Description
1 ............................Shield ....................I/O........ Shield for cable
2 ............................TD.........................I............. Transmitted Data
3 ............................RD.........................O........... Received Data
4 ............................RTS........................I............. Request to Send
5 ............................CTS.......................O........... Clear To Send
6 ............................DSR.......................O........... Data Set Ready
7 ............................SG........................I/O........ Signal Ground
8 ............................CD........................O........... Carrier Detect
9 ............................NC .......................N/A ...... No Connection
10 ..........................NC .......................N/A ...... No Connection
11 ..........................NC .......................N/A ...... No Connection
12 ..........................NC .......................N/A ...... No Connection
13 ..........................NC .......................N/A ...... No Connection
14 ..........................NC .......................N/A ...... No Connection
..............................15 ........................TC ......... O Transmit Clock
16 ..........................NC .......................N/A ...... No Connection
17 ..........................RC ........................O........... Receive Clock
18 ..........................NC .......................N/A ...... No Connection
19 ..........................NC .......................N/A ...... No Connection
20 ..........................DTR .......................I............. Data Terminal Ready
21 ..........................NC .......................N/A ...... No Connection
22 ..........................RI..........................O........... Ring Indicator
23 ..........................NC .......................N/A ...... No Connection
24 ..........................ETC.......................I............. External Transmit Clock
25 ..........................NC .......................N/A ...... No Connection
I = Input.............. O = Output........N/A = Not Applicable
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Appendix E: Connector Pinouts
PIN 13
PIN 25
PIN 1
FEMALE
PIN 14
Figure E-2
RS-530 Interface
Table E-B
RS-530 Interface
Pin
Name
I/O
Description
1 ........................... Shield ................... I/O........Shield for cable
2 ........................... TD-A ..................... I.............Transmitted Data
3 ........................... RD-A ..................... O...........Received Data
4 ........................... RTS-A .................... I.............Request To Send
5 ........................... CTS-A ................... O...........Clear To Send
6 ........................... DSR-A ................... O...........Data Set Ready
7 ........................... SG ....................... I/O........Signal Ground
8 ........................... CD-A .................... O...........Carrier Detect
9 ........................... RC-B ..................... O...........Receive Clock (return)
10 ......................... CD-B..................... O...........Carrier Detect (return)
11 ......................... ETC-B.................... I.............External Transmit Clock (return)
12 ......................... TC-B ..................... O...........Transmit Clock (return)
13 ......................... CTS-B.................... O...........Clear To Send (return)
14 ......................... TD-B...................... I.............Transmit Data (return)
15 ......................... TC-A..................... O...........Transmit Clock
16 ......................... RD-B ..................... O...........Receive Data (return)
17 ......................... RC-A..................... O...........Receive Clock
18 ......................... NC ...................... N/A.......No Connection
19 ......................... RTS-B .................... I.............Request To Send (return)
20 ......................... DTR-A.................... I.............Data Terminal Ready
21 ......................... NC ...................... N/A.......No Connection
22 ......................... DSR-B.................... O...........Data Set Ready (return)
23 ......................... DTR-B.................... I.............Data Terminal Ready (return)
24 ......................... ETC-A ................... I.............External Transmit Clock
25 ......................... NC ...................... N/A.......No Connection
I = Input ..............O = Output .......N/A = Not Applicable
V .35
B
A
R
V
Z
Y
DD
JJ
F
E
L
NN
LL
J
N
T
X
D
C
BB FF
K
P
U
CC HH MM
EE KK
AA
M
S
W
H
Figure E-3
V.35 Interface
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Appendix E: Connector Pinouts
Table E-C
V.35 Interface
(Provided by RS-530/232-to-V.35 Adapter, part number 1200072L1)
Pin
Name
I/O
Description
A ............................Shield ....................I/O........ Shield for cable
B ............................SG........................I/O........ Signal Ground
C............................RTS........................I............. Request To Send
D............................CTS.......................O........... Clear To Send
E.............................DSR.......................O........... Data Set Ready
F.............................CD........................O........... Carrier Detect
H............................DTR .......................I............. Data Terminal Ready
J .............................RI..........................O........... Ring Indicator
P.............................SD-A......................I............. Send Data
R.............................RD-A......................O........... Receive Data
S ............................SD-B......................I............. Send Data (return)
T.............................RD-B ......................O........... Receive Data (return)
U............................TC-A......................I............. External Transmit Clock
V ............................RC-A......................O........... Receive Clock
W...........................TC-B......................I............. External Transmit Clock (return)
X.............................RC-B......................O........... Receive Clock (return)
Y ............................ST-A ......................O........... Send Timing
AA..........................ST-B.......................O........... Send Timing (return)
K,L ..........................NC .......................N/A ...... No Connection
M,N........................NC .......................N/A ...... No Connection
BB...........................NC .......................N/A ...... No Connection
CC .........................NC .......................N/A ...... No Connection
DD..........................NC .......................N/A ...... No Connection
EE...........................NC .......................N/A ...... No Connection
FF ...........................NC .......................N/A ...... No Connection
HH..........................NC .......................N/A ...... No Connection
JJ.............................NC .......................N/A ...... No Connection
KK...........................NC .......................N/A ...... No Connection
LL............................NC .......................N/A ...... No Connection
MM ........................NC .......................N/A ...... No Connection
NN ........................NC .......................N/A ...... No Connection
I = Input.............. O = Output......... ............N/A = Not Applicable
PIN 13
PIN 1
FEMALE
PIN 25
PIN 14
Figure E-4
RS-366 Interface
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Appendix E: Connector Pinouts
Table E-D
RS-366 Interface
Pin
Name
I/O
Description
1 ........................... Shield ................... I/O........Shield for cable
2 ........................... DPR ...................... I.............Digit Present
3 ........................... ACR...................... O...........Abandon Call and Retry
4 ........................... CRQ..................... I.............Call Request
5 ........................... PND ..................... O...........Present Next Digit
6 ........................... PWI...................... O...........Power Indication
7 ........................... SG ....................... I/O........Signal Ground
13 ......................... DSC ..................... O...........Distant Station Connect
14 ......................... NB1..................... I.............Digit LSB
15 ......................... NB2..................... I.............Digit bit 2
16 ......................... NB4..................... I.............Digit bit 3
17 ......................... NB8..................... I.............Digit bit MSB
22 ......................... DLO...................... O...........Data Line Occupied
8-12....................... NC ...................... N/A.......No Connection
18-21..................... NC ...................... N/A.......No Connection
23-25..................... NC ...................... N/A.......No Connection
I = Input ..............O = Output........ ............ N/A = Not Applicable
PIN 1 PIN 8
ISDN
Figure E-5
RJ-45 Dial Line Connector U Interface
Table E-E
RJ-45 Dial Line Connector U Interface
Pin
4
5
Description
Ring
Tip
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Appendix E: Connector Pinouts
Table E-F
RJ-45 Dial Line Connector S/T Interface
Pin
3
Description
TxP
4
RxP
5
6
RxN
TxN
Table E-G
Maintenance Connector
Pin
Description
CD
1
2
3
4
5
6
7
8
9
RD
TD
DTR
SG
DSR
RTS
CTS
RING
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Appendix E: Connector Pinouts
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Appendix F
Ordering ISDN Without IOCs
ISDN is a complex service with multiple options. Obtaining ser-
vice from your local telephone company and long distance pro-
viders can sometimes be complicated. This appendix guides you
and your telephone company in specifying and obtaining your
ISDN service requirements.
To support most of the features in the ISU 2x64, your telephone
service needs to meet certain requirements. A general descrip-
tion of these requirements follows. Depending on your actual
data service needs, some features may be deleted. Other features
may not be available in your area. Also, features may be deleted
for economic reasons, depending on your needs and local tariffs.
Talk to your telephone company first, and find out which of the
services listed on the following pages are provided.
The following form has been designed to assist you. Complete
and FAX this form to your telephone company to request the
proper type of ISDN telephone line for use with the ADTRAN
ISU 2x64.
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Appendix F: Ordering ISDN Without IOCs
ISDN Service Ordering Information for the ADTRAN ISU 2x64
For ADTRAN ISU 2x64 applications, the following guide can be used as an aid in
ordering basic ISDN service from your local telephone company.
The ADTRAN ISU 2x64 ISDN Service Unit (part numbers 1200051L1 and 1200051L3)
includes NT1 and Terminal Adapter functionality and supports data at rates up to 128
kbps. The ADTRAN ISU 2x64s (part numbers 1200051L2 and 1200051L4) are tradi-
tional Terminal Adapters and do not include NT1 functionality. The ADTRAN ISU
2x64 International (part numbers 1200051L5 and 1200051L6) also do not include NT1
functionality.
Name:_____________________________________________________________________
Address:___________________________________________________________________
City: _________________________________ State:_______________________________
Zip Code: ___________________ Daytime telephone number: __________________
Request an ISDN Basic Rate Interface (BRI) line.
•
•
•
U-interface reference point
2B1Q line coding
2B+D Service (supports up to 128 kbps)
The ISU 2x64 supports the following switch types and software protocols.
AT&T 5ESS
Custom, 5E6 and later software, National ISDN-1
NTI DMS-100
BCS-32 and later software (PVC1), National ISDN-1
(PVC2)
Siemens EWSD
NEC Switch
Euro ISDN
National ISDN-1
NTT Protocol
ETS300 Protocol
Request that the ISDN line allocate one dynamic terminal endpoint identifier (TEI) per
phone number.
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Appendix F: Ordering ISDN Without IOCs
For service offered from an AT&T 5ESS, request a multipoint line, with the following
features:
Feature
B1 Service
B2 Service
Data Line Class
Value
On Demand (DMD)
On Demand (DMD)
Multipoint
Maximum B Channels
Circuit Switched Voice Bearer (CSV) Channels
2
Any
Number of CSV calls
Circuit Switched Data (CSD) Bearer Channels
Number of CSD calls
1 (recommended for testing purposes)
Any
2
Terminal Type
Type A
Turn the following features off:
Packet Mode Data
Multiline Hunt
Multiple Call Appearances
Electronic Key Telephone Sets (EKTS)
Shared Dictionary Numbers
Accept Special Type of Number
Intercom Groups
Network Resource Selector (Modem Pools)
Message Waiting
Hunting
InterLATA Competition
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Appendix F: Ordering ISDN Without IOCs
For service offered from a Northern Telecom DMS-100, request a multipoint line, with
the following features.
Line Type
Basic Rate, Functional
Electronic Key Telephone Sets (EKTS)
Call Appearance Handling (CACH)
Non-Initializing Terminal
Circuit Switched Service
Packet Switched Service
TEI
No
No
No
Yes
No
Dynamic
Bearer Service
Circuit Switched Voice and Data Permitted on any
B Channel (Packet mode data not permitted)
Identify your long distance carrier of choice and request circuit-switched 64 kbps
Clear Channel access if possible.
Long distance access should be provided through_______________________________.
Ensure that the telephone company provides you with the following information for
configuring the ISU 2x64:
•
•
•
•
ISDN switch type
ISDN switch protocol version
ISDN phone number(s)
Service profile identification (SPID) number(s) with prefixes
and suffixes, if applicable (if ISDN line is multipoint)
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Appendix F: Ordering ISDN Without IOCs
LOCAL INTERFACE REQUIREMENTS
Physical Interface
•
•
•
ISDN Basic Rate Interface (BRI) line
U-interface reference point
2B1Q line coding
ISDN service must be provided from one of the following CO
switches and protocols:
Switch
Protocol
AT&T 5ESS
Custom (5E6 or later software)
National ISDN-1
Northern Telecom DMS-100
Siemens EWSD
BCS-32 or later software (Pvc1)
National ISDN-1 (Pvc2)
National ISDN-1
The interface provides the ability to allocate one dynamic (TEI)
per phone number.
Local Service
•
Bearer capabilities:
- Circuit mode voice service for speech and 3.1 kHz
audio.
- Circuit mode data service for 56 kbps and 64 kbps
unrestricted data.
•
Two simultaneous calls supported on the interface. Any mix
of speech and data bearer capabilities is supported for both
bearer channels on incoming and outgoing calls.
•
•
Service provided inside the LATA for the bearer capabilities.
Long distance access for the bearer capabilities to and from
the long distance providers of choice.
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Appendix F: Ordering ISDN Without IOCs
Long Distance Service
If facilities are available, subscribe to long distance service sup-
porting the bearer capabilities previously listed. Request service
supporting circuit-switched 64 kbps or 56 kbps access. It is rec-
ommended that the same long distance carrier end-to-end
throughout the network to be used.
Deciding What Services to Order
If you are new to ISDN, first obtain the features previously listed.
Refer to the section ISDN Service Ordering Information in this
appendix as a basic guide. It is easier to begin operating on a full
featured line because more options are available. Later, features
not actually used can be deleted.
If all of the previous features are not available, compare the actual
data service requirements with those which are available. A
likely problem is the lack of a clear trunk to provide 64 kbps unre-
stricted data service. A solution is to use to 56 kbps service.
Sometimes voice circuits are suitable for data service at a reduced
bit rate.
5ESS Custom Line Additional Parameters
The AT&T 5ESS central office telephone switch supports a propri-
etary ISDN D-channel call control protocol called Custom which
is based on CCITT recommendations. The ISU 2x64 configured
for switch type AT&T 5ESS will work with lines providing this
protocol on 5ESS switches with software version 5E6 or later.
The ISU 2x64 supports the following configurations on 5ESS cus-
tom lines:
•
•
•
Point-to-point with one phone number
Multipoint with one phone number
Multipoint with two phone numbers (recommended configu-
ration)
The requirements for the 5ESS point-to-point line are defined in
Table F-A.
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Appendix F: Ordering ISDN Without IOCs
Table F-A
5ESS Features
B1 service
On-Demand (DMD)
On-Demand(DMD)
Point-to-point
2
B2 service
Data line class
Maximum B channels
Number of circuit switched voice (CSV) calls
Circuit switched voice bearer channels
Number of circuit switched data (CSD) calls
Circuit switched data bearer channels
Terminal type data bearer channels
2
Any
2
Any
Type A
Multipoint lines require the phone company to create a SPID for
each phone number on the line. With the exception of the ability
to spread two calls across two phone numbers, multipoint lines
offer no special features, and may create complications. How-
ever, if you use a multipoint line, the parameters are similar to the
point-to-point line, except for the SPIDs.
The 5ESS switch can provide a variety of supplementary features
which the ISU 2x64 may not support. Enabling these features
may have undesirable consequences. Avoid the following fea-
tures:
•
•
•
•
•
•
•
•
•
•
Packet Mode Data
Multiline hunt groups
Electronic key telephone set (EKTS)
Shared directory numbers
Intercom groups
Network resource selector (modem pools)
Message waiting
Hunting
InterLATA competition
Accept special type of number
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Appendix F: Ordering ISDN Without IOCs
DMS-100 Protocol Version 1 Line Additional Parameters
The Northern Telecom DMS-100 telephone switch supports a
proprietary ISDN D-channel call control protocol called Pvc1
which is based on CCITT recommendations. The ISU 2x64 con-
figured for switch-type DMS-100 is functional on lines providing
this protocol on DMS-100 switches with software version BCS-32
or later. The ISU 2x64 supports the following configurations on
DMS-100 lines:
•
•
Multipoint with one phone number (1B+D service)
Multipoint with two phone numbers (for 2B+D service)
The requirements for the DMS-100 multipoint line are defined in
the sections Local Interface, Local Service, and in Table F-B, all in
this appendix. The line should have two service profiles with the
following parameters to support BONDING.
Table F-B
DMS Features
Line type
Basic Rate, Functional
Electronic key telephone set (EKTS)
Call appearance handling (CACH)
Initializing terminal
No
No
Yes
Bearer service
Circuit Switched Voice and Data permitted.
Packet mode data not permitted.
Circuit switched service
Packet switched service
Protocol Version
TEI
Yes
No
Functional PVC 1
Dynamic
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Appendix F: Ordering ISDN Without IOCs
After Service Is Installed
When the line is installed, the following information will be pro-
vided by the local phone service provider:
•
A seven-digit LDN for the line. If the line is multipoint with
two phone numbers, two LDNs are provided.
•
•
•
If the line is multipoint, a SPID is provided for each LDN.
Dialing information, including the area code, for the line.
Any special instructions for dialing outside lines, dialing 4-
digit local extension numbers, and prefixes for using the de-
sired long distance provider.
SETTING UP THE ISU 2X64 FOR A NEW LINE
1. Disconnect the ISDN line from the ISU 2x64.
2. Turn on the ISU 2x64, verify that it passes self test.
3. Turn off the ISU 2x64; while holding down 0, turn on the ISU
2x64. Continue to press down 0 for 15 seconds. This will re-
set all the internal settings to factory defaults.
4. The ISU 2x64 is now set up for 5ESS Custom. If this is not the
correct line-type, select CONFIG, Netw. Options, Dial Line,
Switch Type, and the desired switch type.
5. Enter the SPIDs and LDNs for the ISDN multipoint line. Se-
lect CONFIG, Netw. Options, Dial Line, Terminal ID, Set
SPID/Set LDN and enter the SPIDs and LDNs. Make sure
that SPID1 corresponds to LDN1 and SPID2 corresponds to
LDN2.
6. Turn the ISU 2x64 off for 2 seconds, then on. This is required
after changing any of the previous settings. The ISU 2x64
should now be set up for your ISDN line. You may wish to
verify the settings.
7. Connect the ISDN line to the ISDN IFC connector on the ISU
2x64. The front panel should read Link Down and progress
to Ready as the line is activated. This process may take a
minute.
At this point, if the ISU 2x64 does not read Ready, see the section
If the ISU 2x64 Does Not Read Ready in the chapter Troubleshooting.
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Acronyms
2B1Q
AMI
B (Channel)
BONDING
bps
BRI
CCITT
2 Binary, 1 Quarternary
Alternate Mark Inversion
A 64 kbps digital information channel
Bandwidth On Demand Interoperability Group
Bits per second
Basic Rate Interface
Consultative Committee for International Telegraphy and Te-
lephony
Carrier Detect
Connect Incoming Call
Clear to Send
Data Communications Equipment
Digital Multiplex Switching
Data Set Ready
Data Terminal Equipment
Electronic Key Telephone Service
Facsimile
High Layer Compatibility
Identification
Inteface
Input/Output
CD
CIC
CTS
DCE
DMS
DSR
DTE
EKTS
FAX
HLC
ID
IFCE
I/O
ISDN
ISO
Integrated Services Digital Network
International Standardization Organization
Kilobits per second
kbps
kHz
LAN
LDN
Mbps
NT1
PBX
PC
Kilohertz
Local Area Network
Local Directory Number
Megabits per second
Network Termination 1
Private Branch Exchange
Personal Computer
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Acronyms
PRI
Primary Rate Interface
SPCS
SPID
TA
TE
TEI
Stored Program Controlled Switching System
Service Profile Identifier
Terminal Adapter
Terminal Equipment
Terminal Endpoint Identifier
Wide Area Network
WAN
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Glossary
asynchronous transmission
Not Synchronous. A method of data transmission which allows characters to be
sent at irregular intervals by preceding each character with a start bit and following
it with a stop bit. The timing of the transmission is not determined by the timing of
a previous character. Applications include communication between most small
computers (especially PCs) and mainframes, lower speed transmission, and less
expensive computer transmission systems. See Synchronous.
B-channel
64 kbps bearer channel used for voice, circuit, or packet switched data.
bandwidth
The range of electrical frequencies a device is capable of handling. The amount of
bandwidth a channel is capable of carrying tells you what kinds of communica-
tions can be carried on it. For example, a wide band circuit can carry a TV channel.
A wide band circuit that is capable of providing one video channel can also pro-
vide 1,200 voice telephone channels.
bearer service
As defined by CCITT standards, a type of telecommunication service that provides
the capability for the transmission of information between user-to-network inter-
faces. Bearer services defined for ISDN are circuit mode and packet mode.
BONDING mode 1 protocol
Industry standard B-channel aggregation protocol. Developed by the Bandwidth
on Demand Interoperability Group.
BRA
basic rate access. The BRA includes two 64 kbps B-channels and one 16 kbps D-
channel. Also known as Basic Rate Interface (BRI).
bridging
The technique whereby additional stations may be served from a two-point facility
by extending the facility from a bridge at one of the facility’s terminating points.
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Glossary
CCITT
Consultative Committee on International Telephony and Telegraphy. A body of
the International Telegraph Union (ITU) which prepares recommendations, com-
monly referred to as international standards, to resolve technical telegraph and
telephone problems.
central office (CO)
In telephony, the facility housing the switching system and related equipment that
provides telephone service for customers in the immediate geographical area.
circuit mode
Type of switching that assigns a call to a specific circuit path. The circuit is not
shared with other calls.
clear channel
A channel in which all the 64 kbps are used for transmission. To achieve this, bit
robbing signalling must be eliminated. (NOTE: Not to be confused with clear chan-
nel protocol.)
common channel interoffice signalling (CCIS)
A signalling system developed for use between stored program switching systems.
All of the signalling information for a group of trunks is transmitted over a dedi-
cated high-speed data link rather than on a trunk. CCIS reduces call setup time
compared to individual trunk signalling.
CPE
Customer premises equipment. A generic term for communications terminal gear
owned by the customer, residing on customer premises.
CSU
Channel service unit. A component of CPE used to terminate a digital circuit, such
as DDS or T1 at the customer site. Performs certain line-conditioning functions,
ensures network compliance per FCC rules, and responds to loopback commands
from the central office. Also ensures proper 1s density in transmitted bit stream
and performs bipolar violation correction. See DSU.
D-channel
The ISDN channel that carrier signalling information to control the call setup, tear-
down, or invocation of supplementary services. The D-channel may also be used
to provide packet mode data service.
DCE
data communications equipment. The portion of a data terminal that provides the
interface to the network.
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Glossary
DDS
dataphone digital service. AT&T private line service for transmitting data over a
digital system. The digital transmission system transmits electrical signals direct-
ly, instead of translating the signals into tone of varied frequencies as with tradi-
tional analog transmission systems. Digital techniques provide more efficient use
of transmission facilities, resulting in lower error rates and costs than analog sys-
tems.
digital
Referring to communications procedures, techniques, and equipment where infor-
mation is encoded as either a binary 1 or 0, the representation of information in dis-
crete binary form, discontinuous in time, as opposed to the analog representation
of information in variable but continuous waveforms.
DSU
data service unit. A device providing interface between a data terminal or other
data communications device and a digital access line.
DTE
data terminal equipment. The portion of a data terminal that interfaces to the end-
user’s equipment. The main difference between DCE and DTE is that pins 2 and 3
are reversed on the EIA-232.
Frame
A group of bits sent serially over a communications channel. Generally a local
transmission unit sent between data-link-layer entities that contains its own con-
trol information for addressing and error checking. The basic data transmission
unit is employed with bit-oriented protocols, similar to blocks. In video transmis-
sion, a set of electron scan lines that comprise a television picture (usually 525 in
the U.S.).
in-band signalling
Signalling made up of tones which pass within the voice frequency band and are
carried along the same circuit as the talk path being established by the signals. Vir-
tually all signalling (request for service, dialing, disconnect, etc.) in the U.S. is in-
band signalling. Most of that signalling is MF (multi-frequency) dialing. The more
modern form of signalling is out-of-band.
information element
The name for the data fields within an ISDN Layer 3 message.
interface
A common boundary between two systems over which the inter-system commu-
nication occurs.
interworking
Communication between two types of networks or end equipment. This may or
may not involve a difference in signalling or protocol elements supported.
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Glossary
ISDN
Integrated service digital network. A network architecture that enables end-to-
end digital connections. The network supports diverse services through integrat-
ed access arrangements and defines a limited set of standard, multipurpose inter-
faces for equipment vendors, network providers, and customers. Interworking
with a public switched telephone network is retained.
LATA
Local Access and Transport Area. One of 161 local telephone serving areas in the
United States, generally encompassing the largest standard statistical metropoli-
tan areas. Subdivisions established as a result of the AT&T divestiture that now
distinguish local from long distance service. Circuits with both end-points within
the LATA (intraLATA) are generally the sole responsibility of the local telephone
company, while circuits that cross outside the LATA (interLATA) are passed on to
an interexchange carrier.
Loopback
A diagnostic procedure where data is sent to the device being tested, and the out-
put of the device is fed directly back to its input, looped around, and the returning
data is checked against that which was sent.
loopback test
A test typically run on a 4-wire circuit. Two transmit leads are joined to the two
receive leads. A signal is then sent around the loop. Measuring differences be-
tween the sent and received signal is the essence of a loopback test.
master clock
The source of timing signals, or the signals themselves, which all network stations
use for synchronization.
message
The Layer 3 information that is passed between the CPE and SPCS for signalling.
multiplexing
The combining of multiple data channels onto a single transmission medium. Any
process through which a circuit normally dedicated to a single user can be shared
by multiple users. Typically, user data streams are interleaved on a bit or byte ba-
sis (time division) or separated by different carrier frequencies (frequency divi-
sion).
multipoint circuit
A circuit consisting of three or more stations connected directly electrically.
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Glossary
NEXT (near-end crosstalk)
Unwanted energy transferred from one circuit to an adjoining circuit. Occurs at
the end of the transmission link where the signal source is located. The absorbed
energy is usually propagated in the direction opposite to the absorbing channel’s
normal current flow. Caused by high-frequency or unbalanced signals and insuf-
ficient shielding.
non-ISDN line
Any connection from a CPE to a SPCS that is not served by D-channel signalling.
non-ISDN trunk
Any trunk not served by either SS7 or D-channel signalling.
NT1
Network Termination 1. A unit that provides physical and electromagnetic termi-
nation of the U-interface 2-wire transmission line, converts between Layer 1 for-
mats used at the U- and T- reference points, and performs some maintenance
functions.
packet mode
Refers to switching of packets of information for different users by statistically
multiplexing them over the same transmission facilities. ISDN packet mode capa-
bilities are based on CCITT Recommendation X.25 procedures.
point-to-point
Describing a circuit connecting two points directly with no intermediate process-
ing nodes or computers (although switching facilities could exist). A type of con-
nection that links two logical entities (i.e., phone-line circuit).
S-interface
S-reference point. The interface that connects an ISDN terminal (TE1) or Terminal
Adapter (TA) to the NT2 reference point as defined in the I.411 Recommendation.
SPCS
stored program controlled switch. A digital switch that supports call control, rout-
ing, and supplementary services provision under software control. All ISDN
switches are SPCSs
SDLC
synchronous data link control. A data communications line protocol associated
with the IBM System Network Architecture. SDLC is a bit-oriented protocol (not
a character-oriented protocol) that includes multiple block error checking and full
duplex line operation.
sync bits
Framing or synchronizing bits in synchronous transmission.
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Glossary
synchronous
1. The condition occurring when two events happen in a specific time relationship
with each other, both under control of a master clock. 2. A method of data trans-
mission requiring the transmission of timing pulses to keep the sender and receiv-
er synchronized in their communication used to send blocks of information.
Synchronous data transmission is used in high-speed data circuits because there is
less overhead than asynchronous transmission of characters which contain two ex-
tra bits per character to affect timing.
T1
Also T-1. A digital transmission link with a capacity of 1.544 Mbps. T1 uses two
pairs of normal twisted wires. T1 normally can handle 24 voice conversations with
each conversation being digitized at 64 kbps. With more advanced digital voice
encoding techniques, it can handle more voice channels. T1 is a standard for digi-
tal transmission in North America.
TA
Terminal Adapter. A DCE that connects to the ISDN S-Interface and enables non-
ISDN terminal equipment to communicate over ISDN.
TE1
TE2
terminal equipment type 1. ISDN-compatible terminals.
terminal equipment type 2. Non-ISDN terminal equipment linked at the EIA-232,
RS-449, or V.35 interface.
transmission
The dispatching of a signal, message, or other form of intelligence by wire, radio,
telegraphy, telephony, facsimile, or other means. A series of characters, messages
or blocks including control information and user data. The signalling of data over
communications channels.
transmission level
The power of a transmission signal at a point of a transmission facility. It may be
measure in absolute terms (dBm) or in a ratio to its level at some reference point
(dB).
twisted pair
Two wires twisted around each other to reduce induction (interference) from one
wire to the other. Several sets of twisted pair wires may be enclosed in a single ca-
ble. Twisted pair is the normal cabling from a Central Office to your home or of-
fice, or from your PBX to your office phone. Twisted pair wiring comes in various
thicknesses. As a general rule, the thicker the cable is, the better the quality of the
conversation and the longer cable can be and still get acceptable conversation qual-
ity. However, the thicker it is, the more it costs.
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Glossary
2B+D
The basic rate interface (BRI) in ISDN. A single ISDN circuit divided into two 64
kbps digital channels for voice or data and one 16 kbps channel for low speed data
(up to 9,600 baud) and signalling. 2B+D is carried on one or two pairs of wires de-
pending on the interface, the same wire pairs that today bring a single voice circuit
into your home or office. See ISDN.
U-interface
A twisted pair subscriber loop that connects the NT1 reference point to the ISDN
network, as defined in the I.411 Recommendation. This interface provides basic
rate access with an operating frequency of 160 kbps and an information rate of 144
kbps. Under U.S. regulations, this also marks the line of demarcation between cus-
tomer-owned equipment and the public network.
V.32
9.6 kbps, 2-wire duplex modem standard.
videoconferencing
The real-time, usually two-way, transmission of digitized video images between
two or more locations. Videoconferencing requires a wideband transmission facil-
ity. Transmitted images may be freeze-frame (where television screen is repainted
every few seconds to every 20 seconds) or full motion. Bandwidth requirements
for two-way video conferencing range from six MHz for analog, full-motion, full-
color, commercial grade TV to 56 kbps for digitally-encoded freeze-frame to 1.544
kbps for high-quality, full-color, full-motion TV.
X.25
A packet data transfer protocol for the B and D-channels. Defines the interface be-
tween data terminal equipment (DTE) and data circuit terminating equipment
(DCE) for terminals operating in the packet mode and connected to public data
networks by dedicated circuits.
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Glossary
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Index
busy out port
disabled 34
enabled 34
setting 33
Numerics
2B1Q leased digital service 47
5ESS custom line additional parameters
130
C
5ESS features 131
call screening
setting 45
A
call type
adapters
setting 31
RS-530-to-V.35 14
always tone 44
answer call 64
answer tone
CD options 51
cfg. rmt. unit 75
channel rate 48
clear channel 56
clock mode
setting 43
async. rev. 58
slave/master 47
configuration 27
quick setup 65
configuration screen 22
configuration, 27
connect timeout
setting 45
AT command processor 38
AT commands 36, 37, 89
AT commands, 85, 89
AT&T 5ESS, 28
audio 31
auto answer 40
setting 42
connection
autobaud 54
dial interface 16
DTE data 14
network 13
B
connector pinouts 119
connector type 51
CTS options 51
B channel aggregation 86
bit rate 51
BONDING mode 1 56
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Index
current status menu 18
DSU 57.6 async 59
DTE data connection 14
DTE indicators 3, 18
DTE interface 85
current status messages 95
D
DTE options for async and sync opera-
tion 50
data 56kbps 31
data 64kbps 31
data format (async) 53
data rates
DTR options 52
E
(DTE) 86
(network) 85
EIA-232 interface 119
environmental specifications 87
dial 112K sync 67
dial 115.2 asyn 69
dial 128K sync 68
dial 56K sync 66
dial 57.6 asyn 68
dial 64K sync 67
dial interface connection 16
dial line menu tree 27
dial line operation 27
dial line, 27
F
factory setup 71
fallback 60
fallback 57.6k 69
FEBE 26
flow control 52
front panel 3, 4
dialing options 63
dial menu tree 63
dial number 64
dial options 63
AT commands 36
front panel 34
RS 366 34
setting 34
dial options, 73
dial stored # 64
dial stored #, 75
dialing 2
G
getting started 19
getting TEI #2, 81
H
hang up line 64
I
dialing options
answer call, 75
dial number, 75
V.25 bis 39
dialing options screen 63
dialing selections 85
disabled 34
display 87
DSR options 52
if self test fails 77
if the ISU 2x64 does not read ready 77
if the wrong DTE port answers a call 83
if you cannot connect calls 84
in-band dialing
disabled 42
incoming tone 44
indicators 3
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Index
installation
ISU 2x64
lock keypad 74
loopback both DTEs 26
loopback disable 25
loopback DTE 24
installation 13
interface
maintenance 15
loopback network 24
loopback points 24
loopback protocol 24
loopback remote 25
Lpbk remote 1B 75
Lpbk remote 2B 75
interfaces 2
interoperability 4, 86
ISDN
ordering codes 9
overview 1
service 9
ISU 2x64
M
dialing from 2
front panel 3, 4
interfaces 2
interoperability 4
operation 17
overview 1
maintenance connector 123
maintenance help screen 15
maintenance interface 15
menu navigation 17
multilink PPP 62
rear panel 2
single port operation 4
N
L
NEBE 26
negotiation fail, 105
network connection 13
network interface 85
no answer tone 44
LCD configuration menu tree 29
ldm 64K master 70
LDNs
setting 33
Northern Telecom DMS-100, 28
leased 64K 70
leased application with channel banks
48
O
leased line service 47
operating protocols 6
operation 17
LED indicators
carrier detect, 87
dial line 27
clear to send, 87
ordering ISDN without IOCs 125
outgoing tone 44
data set ready, 87
data terminal ready from DTE, 87
receive data, 87
out-of-band RS 366 dialing 16
request to send, 87
transmit data, 87
P
LED indicators, 87
limited distance modem application 48
physical specifications 87
pinouts
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Index
maintenance connector, 123
RS-530-to-V.35 adapters 14
RTS options 51
RJ-45 dial line connector S/T inter-
face, 123
RJ-45 dial line connector U interface,
122
S
SAP 59
RS-366, 122
Sbus termination 46, 49
security 73
RS-530, 120
V.35, 121
security menu tree 73
self test fails 77
point-to-point async-to-sync 61
point-to-point protocol 62
power 87
set password 74, 75
setting answer tone 43
setting auto answer 42
setting call screening 45
setting connect timeout 45
setting protocol options 55
setting the busy out port 33
setting the call type 31
setting the dial options 34
setting the LDN 33
setting the SPID 32
setting the switch protocol 28
setting the terminal ID 32
single port operation 4
smart dial strings 32
software version 26
specifications 85
PPP async-to-sync 61
PPP protocol 62
PPP with compression 62
protocol options
setting 55
Q
quick setup configuration 65
quick setup menu tree 65
quick setup, 65, 66
R
rate adaptation protocols 60
rate adaption 86
rear panel 2
recommended operating protocols 6
redial last # 64
register SPID #2, 82
remote config 74
speech 31
SPIDs 4, 6
setting 32
S-registers 37, 38
list 109
remote config menu tree 74
RJ-45 dial line connector S/T interface
123
status buffer 20
status buffer messages 99
status screen 21
RJ-45 dial line connector U interface 122
store/review # 64
switch compatibility 86
switch protocol
RS 366 dialing
out-of-band 16
RS-366 interface 121, 122
RS-366 interface, 85
setting 28
RS-530 interface 120
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Index
T
TANULL 58
TCID 58
terminal ID
setting 32
test 2047 both 26
test menu screen 23
test menu tree 24
test options 23
test remote 25
testing 23
T-link 59
transmit clock (async) 53
troubleshooting 77
troubleshooting calls 84
TXADD01 57
TXDEQ 58
TXFA 57
TXINIT 57
V
V.110 59
V.120 58
V.25 39
V.25 async dialing 40
V.25 bis, 85
V.25 HDLC flag 42
V.25 sync bisync dialing 42
V.25 sync HDLC Dialing 41
V.35 interface 120, 121
VT 100 configuration menu tree 28
VT 100 configuration screen 22
VT 100 dialing options screen 63
VT 100 maintenance help screen 15
VT 100 menu support 19
VT 100 status screen 21
VT 100 test menu screen 23
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Index
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Product Support Information
Presales Inquiries and Applications Support
Please contact your local distributor, ADTRAN Applications En-
gineering, or ADTRAN Sales:
Applications Engineering (800) 615-1176
Sales
(800) 827-0807
Post-Sale Support
Please contact your local distributor first. If your local distributor
cannot help, please contact ADTRAN Technical Support and have
the unit serial number available.
Technical Support (888)4ADTRAN
Repair and Return
If ADTRAN Technical Support determines that a repair is needed,
Technical Support will coordinate with the Customer and Product
Service (CAPS) department to issue an RMA number. For infor-
mation regarding equipment currently in house or possible fees
associated with repair, contact CAPS directly at the following
number:
CAPS Department (256) 963-8722
Identify the RMA number clearly on the package (below address),
and return to the following address:
ADTRAN, Inc.
CAPS Department
901 Explorer Boulevard
Huntsville, Alabama 35806-2807
RMA # _____________
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