Black Box Switch LE14XXA User Manual

Black Box Modular Switches  
Installation and User Guide (8/99)  
April 1999  
LE14XXA  
Modular Switches  
Customer  
Support  
Call our Technical Support Specialists to discuss your application.  
For 24-hour technical support: Call (724) 746-5500 or Fax: (724) 746-0746  
Information  
To order: Call (724) 746-5500 7:00 A.M. to 8:00 P.M. EST  
Mail order: Black Box Corporation. 1000 Park Drive, Lawrence, PA 15055  
i
Download from Www.Somanuals.com. All Manuals Search And Download.  
Black Box Modular Switches  
Installation and User Guide (8/99)  
FCC STATEMENT  
FEDERAL COMMUNICATIONS COMMISSION  
AND  
CANADIAN DEPARTMENT OF COMMUNICATIONS  
RADIO FREQUENCY INTERFERENCE STATEMENTS  
This equipment generates, uses, and can radiate radio frequency energy and if not  
installed and used properly, that is, in strict accordance with the manufacturer’s  
instructions, may cause interference to radio communication. It has been tested and  
found to comply with the limits for a Class A computing device in accordance with  
the specifications in Subpart J of Part 15 of FCC rules, which are designed to provide  
reasonable protection against such interference when the equipment is operated in a  
commercial environment. Operation of this equipment in a residential area is likely to  
cause interference, in which case the user at his own expense will be required to take  
whatever measures may be necessary to correct the interference.  
Changes or modifications not expressly approved by the party responsible for  
compliance could void the user’s authority to operate the equipment.  
This digital apparatus does not exceed the Class A limits for radio noise emission  
from digital apparatus set out in the Radio Interference Regulation of the Canadian  
Department of Communications.  
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les  
limites applicables aux appareils numériques de classe A prescrites dans le  
Règlement sur le brouillage radioélectrique publé par le ministère des  
Communications du Canada.  
iii  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Black Box Modular Switches  
Installation and User Guide (8/99)  
NORMAS OFICIALES MEXICANAS (NOM)  
ELECTRICAL SAFETY STATEMENT  
INSTRUCCIONES DE SEGURIDAD  
1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de que el  
aparato eléctrico sea operado.  
2.  
Las instrucciones de seguridad y operación deberan ser guardadas para referencia futura.  
3. Todas las advertencias en el aparato eléctrico y en sus instrucciones de operación deben  
ser respetadas.  
4. Todas las instrucciones de operación y uso deben ser seguidas.  
5. El aparato eléctrico no deberá ser usado cerca del agua—por ejemplo, cerca de la tina de  
baño, lavabo, sótano mojado o cerca de una alberca, etc..  
6. El aparato eléctrico debe ser usado únicamente con carritos o pedestales que sean  
reconnendados por el fabricante.  
7. El aparato eléctrico debe ser montado a la pared o al techo sólo como sea recommendado  
por el fabricante.  
8. Servicio—El usuario no debe intentar dar sercicio al equipo eléctrico más allá a lo descrito  
en las instrucciones de operatión. Todo otro servicio deberá ser referido a personal de  
servicio calificado.  
9. El aparato eléctrico debe ser situado de tal mannera que su posición no interfiera su uso.  
La colocación del aparato eléctrico sobre una cama, sofá, alfombra o superficie similar  
puede bloquea la ventilación, no se debe colocar en libreros o gabinetes que impidan el  
flujo de aire por los orificios de ventilación.  
10. El equipo eléctrico deber ser situado fuera del alcance du fuentes de calor como radiadores,  
registros de calor, estufas u otros aparatos (incluyendo amplificadores) que producen  
calor.  
11. El aparato eléctrico deberá ser connectado una fuente de poder sólo del tipo descrito en el  
instrucivo de operación, o como se indique en el aparato.  
12. Precaución debe ser tomada de mal manera que la tierra fisica y la polarización del equipo  
no sea eliminada.  
13. Los cables de la fuente de poder deben ser guiados de tal manera que no sean pisados ni  
pellizcados por objetos colocados sobre o contra ellos, poniendo particular atención a los  
contactos y receptáculos donde salen del aparato.  
14. El equipo eléctrico debe ser limpiado únicamente de acuerdo a las recommendaciones del  
fabricante.  
15. En caso de existir, una antena externa deberá ser localizada lejos de las lineas de energia.  
16. El cable de corriente deberá ser desconectado del cuando el equipo no sea usado por un  
largo periodo de tiempo.  
17. Cuidado debe ser tomado de tal manera que objectos liquidos no sean derramados sobre la  
cubierta u orificios de ventilación.  
18. Servicio por personal calificado deberá ser provisto cuando:  
A:  
B:  
C:  
D:  
El cable de poder o el contacto ha sido dañado; u  
Objectos han caído o líquido ha sido derramado dentro del aparato; o  
El aparato ha sido expuesto a la lluvia; o  
El aparato parece no operar normalmente o muestra un cambio en su  
desempeño; o  
E:  
El aparato ha sido tirado o su cubierta ha sido dañada.  
iv  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Black Box Modular Switches  
Installation and User Guide (8/99)  
PAGE  
TABLE OF CONTENTS  
1. SPECIFICATIONS.........................................................................................................1  
1.1 Technical Specifications........................................................................................1  
1.2 Model Information................................................................................................4  
2. INTRODUCTION ..........................................................................................................5  
2.1 Inspecting the Package and Product ......................................................................5  
2.2 Product Description - Black Box Modular Switches ...........................................6  
2.2.1 Modular Switch chassis models ................................................................5  
2.2.2 4-port modules, 100Mb fiber ...................................................................7  
2.2.3 4-port module, 10 Mb fiber ......................................................................7  
2.2.4 4-port module, RJ-45 (copper) ................................................................8  
2.2.5 4-port modules, “3 + 1” , 3@RJ-45 and 1@fiber .....................................8  
2.2.6 Frame Buffering and Latency ....................................................................9  
2.3 Features and Benefits..........................................................................................11  
2.4 Applications........................................................................................................12  
3. INSTALLATION.........................................................................................................15  
3.1 Locating the LE14XXA-Series Switches ............................................................15  
3.2 Connecting Ethernet Media.................................................................................16  
3.2.1 Connecting Fiber Optic ST-type “twist-lock” .........................................16  
3.2.2 Connecting Fiber Optic SC-type “snap-in”..............................................17  
3.2.3 Connecting Fiber Optic Single-Mode........................................................17  
3.2.4 Connecting Twisted- Pair, RJ-45..............................................................17  
3.3 Table-top or shelf mounting................................................................................18  
3.3.1 Wall (or Vertical) Mounting..................................................................18  
3.3.2 Rack-Mounting.....................................................................................18  
3.4 Copper ports, Inernal jumper settings for 10/100Mbps ...................................19  
3.5 Fiber ports, Internal Jumper settings for 100Mbps ..........................................20  
3.6 Combo ports, Internal Jumper settings for RJ-45 & fiber 10 or 100Mbps .......21  
3.7 Fiber ports, Internal Jumper settings for 10Mbps ............................................22  
3.8 Powering the LE14XXA-Series Switches ...........................................................23  
3.9 4-port Module (4PM) Installation......................................................................24  
3.9.1 Preparation for installing, changing and removing 4PMs......................24  
3.9.2 Installing 4PM cards in the LE14XXA-Series chassis..........................26  
3.9.3 Removing 4PM cards in the LE14XXA-Series chassis ........................27  
4. OPERATION................................................................................................................29  
4.1 Switching Funtionality........................................................................................29  
4.2 Status LEDs ........................................................................................................30  
4.3 Manual switches for Up-link and Full/Half Duplex...........................................30  
4.4 Auto-negotiation option for copper Fast Ethernet ports ..................................30  
4.5 Auto-negotiation option for 10 Mbps ports HDX/FDX mode ........................32  
4.6 Collision based flow control................................................................................32  
4.7 Power budget Calculation for LE14XXA-Series 4PM’s Fiber media ................33  
5. 4-PORT MODULES (AS SEPARATE ITEMS IN A SHIPMENT)................................34  
5.1 Inspecting the Package and Product ...................................................................34  
v
Download from Www.Somanuals.com. All Manuals Search And Download.  
Black Box Modular Switches  
Installation and User Guide (8/99)  
5.2 Product Description ...........................................................................................34  
5.2.1 LE1428C, 100Mb multi-mode FX-ST, “twist lock” connector ...............35  
5.2.1a LE1424C, 10 Mb multi-mode FL-ST, “twist-lock” connector...............35  
5.2.2 LE1419C, 100Mb multi-mode FX-SC, “snap-in” connector. .................36  
5.2.3 LE1421C, 100Mb single-mode FX-SC, “snap-in” connector...................36  
5.2.4 LE1422C, 100Mb FX Small-Form-Factor “plug-in” connector...............37  
5.2.5 LE11423C, 100Mb FX Small-Form-Factor “plug-in” connector.............37  
5.2.6 LE1425C, 10/100Mbps (RJ-45 for standard twisted-pair)......................38  
5.2.7 LE1426C, “3TP+1F” Combo (Twisted Pair and 100Mb Fiber SC mm) .39  
5.2.8 LE1427C, “3TP+1F” Combo (Twisted Pair and 100Mb Fiber ST mm) .39  
5.2.9 LE1429C, “3TP+1F” Combo (Twisted Pair and 100Mb Fiber SC sglm)40  
5.2.10 4PM-FP (Face Plate) ..............................................................................40  
6.0 TROUBLESHOOTING.....................................................................................41  
6.1 Before Calling for Assistance..............................................................................41  
6.2 When Calling for Assistance ...............................................................................41  
6.3 Shipping and Packaging Information...................................................................42  
vi  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Black Box Modular Switch  
Installation and User Guide (08/99  
1.  
SPECIFICATIONS  
1.1  
Technical Specifications  
Performance  
Aggregate Filtering Rate:  
2,380,800 frames/sec for 16 100Mbps ports  
(for LE1416A)  
(all ports are wire speed)  
1,190,400 frames/sec for 8 100Mbps ports  
(for LE1401A & LE1408A)  
Aggregate Forwarding Rate: (for Modular Switch Fast Ethernet ports)  
(all ports are wire speed)  
1,190,400 frames per second, 16-port units  
595,200 frames per second, 8-port units  
Data Rate:  
10 Mbps and 100Mbps  
Address Table Capacity:  
24K node addresses (12K on 8-port  
models), with address aging  
8 MB dynamic (4MB for 8-port)  
Packet buffer Size :  
Latency:  
5 ms + packet time (100 to 100Mbps)  
15 ms + packet time (10 to 10 Mbps, and 10 to 100Mbps)  
Network Standards  
Ethernet V1.0/V2.0 IEEE 802.3: 10BASE-T,  
IEEE 802.3u: 100BASE-TX, 100BASE-FX  
Maximum 10 Mbps Ethernet Segment Lengths  
Unshielded twisted pair  
- 100 m (328 ft)  
- 150 m (492 ft)  
- 2 km (6,562 ft)  
- 10 km (32,810 ft)  
Shielded twisted pair  
10BASE-FL multi-mode fiber optic  
10BASE-FL single-mode fiber optic  
Maximum Standard Fast Ethernet Segment Lengths:  
10BASE-T (CAT 3, 4, 5 UTP)  
100BASE-TX (CAT 5 UTP)  
Shielded twisted pair  
- 100 m (328 ft)  
- 100 m (328 ft)  
- 150 m (492 ft)  
100BASE-FX, half-duplex, multi-mode  
100BASE-FX, full-duplex, multi-mode  
- 412 m (1350 ft)  
- 2.0 km (6,562 ft)  
100BASE-SX, short wavelength HDX m.m. - 300 m ( 935 ft)  
100BASE-FX, half-duplex, single-mode  
100BASE-FX, full-duplex, single-mode  
- 412 m (1350 ft)  
- 15.0 km (49,215 ft)  
Connectors for copper wiring  
Twisted Pair at 10/100Mb: RJ-45 shielded, female, front mounted  
(for LE14XXA-Series Fast Ethernet copper ports, use Cat 5 cable)  
Fiber Multi-mode connector types:  
Fiber Port, SC-type (snap-in):  
Fiber optic multi-mode, 100BASE-FX  
Fiber Port, ST-type (twist-lock): Fiber optic multi-mode, 100BASE-FX  
1
Download from Www.Somanuals.com. All Manuals Search And Download.  
lack Box Modular Switches  
Installation and User Guide (8/99)  
Fiber Port, MTRJ-type (plug-in):Fiber optic multi-mode, 100BASE-FX  
Fiber Port, VF-45 type (plug-in): Fiber optic multi-mode, 100BASE-FX  
Fiber Port, ST-type (twist-lock): Fiber optic multi-mode, 10ASE-FL  
Fiber Single-mode connector types:  
Fiber Port, SC-type: Fiber optic single-mode, 100BASE-FX  
Manual switch-selections and jumpers  
Up-link Push-button: Crossover sw for one RJ-45 port per LE1425C  
Fiber default: Full-duplex (Internal jumpers may select HDX mode)  
Copper default: Auto-negotiation (Internal jumpers may alternatively  
lect fixed 100Mb full-duplex, or fixed 100Mbps half-duplex)  
LEDs: Per Port  
LK: Steady ON when media link is operational  
ACT: ON with receiver port activity  
FDX/HDX: ON = Full-Duplex Mode  
OFF = Half-Duplex Mode  
100/10: ON = 100Mbps speed  
OFF = 10 Mbps  
Operating Environment  
Ambient Temperature: 32° to 120° F (0° to 50°C)  
Storage Temperature: -5°to 140°F (-20°to 60°C)  
Ambient Relative Humidity: 10% to 95% (non-condensing)  
Packaging  
Enclosure:Rugged High strength metal. Suitable for stand-alone or rack-mounting  
Dimensions: 1.75 in H x 17.0 in W x 9.0 in D (9.0 in W for QS580)  
4.45cm H x 43.2cm W x 22.9cm D (22.5 cm W for QS580)  
Weight:  
4.0 lb. (1.8 Kg) for rack-mount models, 2.5 lb. for table-top  
Cooling method: Fan cooled, @ 9 cfm  
Power Supply (Internal)  
AC Power Connector: IEC-type, male recessed, rear of chassis, with adjacent  
manual ON-OFF switch (on AC model only)  
Input Voltage:  
110 to 240 VAC (auto-ranging)  
Input Frequency: 47 to 63 Hz (auto-ranging)  
Power Consumption: 20 watts typical (8 port model)  
35 watts typical (16 port model)  
Redundant power supplies available as options  
48VDC Power Supply (Optional)  
Power Input Voltage : 36 to 70 VDC (auto ranging)  
Terminal Block in rear: “-, GND, +”  
Power Consumption: same as for AC models, see above  
2
Download from Www.Somanuals.com. All Manuals Search And Download.  
Black Box Modular Switches  
Installation and User Guide (8/99)  
For Dual Source and Redundant DC supply options, see Appendices  
For optional 23” Telco rack-mount brackets, order Model # RMB-23W  
Agency Approvals  
UL listed (UL1950), cUL, CE  
Emissions meet FCC Part 15 Class A  
Warranty  
Three years, return to factory  
Made in USA  
3
Download from Www.Somanuals.com. All Manuals Search And Download.  
lack Box Modular Switches  
Model Information  
Installation and User Guide (8/99)  
2
Black Box Modular Switches  
MODEL  
LE1401A  
DESCRIPTION  
8-port 10/100 Switch, holds up to two 4-port Modules with 4  
switched ports each. Shelf or table-top mounting. For mixed-media  
flexibility, combinations of RJ-45 and various fiber port connector  
types, modes, and speeds can be configured. Full speed filtering  
and forwarding at 100Mbps speed across all ports, self-learning  
12K-node address table, and large 4MB packet buffers. Front-  
mounted LEDs, internal auto-ranging power supply  
LE1408A  
LE1416A  
Same as Model LE1401A Switch, but in a 19” rack-mount package,  
with mounting brackets.  
Same as Model LE1408A, but with 24K-node address table and  
8MB packet buffers. Holds up to four 4-port Modules (4PMs),  
19” rack-mount package, with mounting brackets.  
LE14XXA-Series 4Port Modules  
LE1419C  
LE1428C  
LE1421C  
LE1422C  
LE1423C  
LE1424C  
LE1425C  
Fiber module for LE14XXA-Series Switches, with four 100Mbps  
multi-mode FX SC connectors  
Fiber module for LE14XXA-Series Switches, with four 100Mbps  
multi-mode FX ST connectors  
Fiber module for LE14XXA-Series Switches, with four 100Mbps  
single-mode FX SC connectors  
Fiber module for LE14XXA-Series Switches, with four 100Mbps  
multi-mode FX “MTRJ” connectors  
Fiber module for LE14XXA-Series Switches, with four 100Mbps  
multi-mode FX “VF-45” connectors  
Fiber module for LE14XXA-Series Switches, with four 10 Mbps  
multi-mode FL ST-type connectors  
RJ-45 module for LE14XXA-Series Switches, with four 100Mbps  
auto-negotiating RJ-45 ports, one of which has an up-link push-  
button  
LE1426C  
3TP+1F module for LE14XXA-Series Switches, with three  
10/100MB auto-negotiating RJ-45 ports and one fiber port with  
100Mbps multi-mode FX SC connector  
LE1427C  
LE1429C  
3TP+1F module, same as LE1426C but with fiber ST-type multi-  
mode connector  
3TP+1F module, same as LE1426C but with fiber SC-type single-  
mode connector  
4
Download from Www.Somanuals.com. All Manuals Search And Download.  
Black Box Modular Switches  
Installation and User Guide (8/99)  
2.  
Introduction  
2.1  
Inspecting the Package and Product  
Examine the shipping container for obvious damage prior to installing this product;  
notify the carrier of any damage which you believe occurred during shipment or delivery.  
Inspect the contents of this package for any signs of damage and ensure that the items listed  
below are included.  
This package should contain:  
1
1
1
1
LE1401A, LE1408A, LE1416A Modular Switches  
AC Power Cord (U.S. and other 115 VAC only)  
Set of two wall-mounting brackets (for LE1401A Model only)  
Set of metal “Ears” for optional “19” rack mounting (for LE1408A & LE1416A  
only)  
1
Installation and User Guide (this manual),  
Remove the items from the shipping container. Be sure to keep the shipping containe  
should you need to re-ship the unit at a later date.  
In the event there are items missing or damaged, contact Black Box. If the unit needs  
be returned, please use the original shipping container if possible. Refer to Section 6,  
Troubleshooting, for specific return procedures.  
5
Download from Www.Somanuals.com. All Manuals Search And Download.  
lack Box Modular Switches  
Installation and User Guide (8/99)  
2
Product Description , 8-port and 16-port Modular Switches  
Black Box LE14XXA series Modular Switches boost the performance of large Ethernet  
ANs, and have the flexibility of both fiber and twisted-pair switched ports. Their “mixed-  
edia” capability provides for a variety of configurations including various types of fiber port  
onnectors and modes, as well as allowing a mix of 10/100Mb RJ-45 (copper) ports in the same  
nit. This flexibility is achieved via a family of 4-Port modules that can be integrated with a base  
nit, in the factory and in the field, to adapt the unit to the individual application’s changing  
ixed-media requirements for a 10/100 Switch product.  
The Black Box LE14XXA-Series provide the switching speed and the reliability to  
moothly support multiple workgroups at 100Mbps or 10 Mbps speed. The LE14XXA-Series  
fers the flexibility of four, eight, twelve or sixteen switched 100Mbps or 10 Mbps fiber and/or  
0/100 twisted pair ports, in all the popular connector types. The Black Box LE14XXA-Series  
fers the LE1401A, LE1404A and LE1416A models, each with a configuration of four port  
odules (4-Port Modules) for fiber types and for copper, as well as “3+1” combo (3 RJ-45 and  
fiber) port modules. The 4-Port Modules can be configured into a LE14XXA-Series Switch  
ase unit in any mix of port connector or media types.  
Designed for use in departments with multiple workgroups, in remote offices and in  
etwork traffic centers, the LE14XXA-Series Switches are easy to install and use. Addresses of  
tached nodes are automatically learned and maintained, adapting the switching services to  
etwork changes and expansions. Front-mounted LEDs provide status information on each port.  
he LE14XXA-Series Switches provide high performance plug-and-play operation in convenient  
ble-top and rack-mount packages.  
2.1 LE14XXA-Series chassis models  
The LE14XXA-Series Modular Switches come in three chassis sizes, an 8-port table-  
p, an 8-port rack-mount, and a 16-port rack-mount. Each is configurable with a selection of  
uad-port (i.e., 4-port) modules, providing the capability of 4, 8, 12, and 16 switched ports. The  
port modules are normally factory installed, but may be changed or added in the field. (See  
ection 5)  
The 8-port LE1401A table-top chassis is compact in size and suitable for shelf-  
ounted use in network wiring centers. The LE1408A and LE1416A are 19” rack-mountable  
6
Download from Www.Somanuals.com. All Manuals Search And Download.  
Black Box Modular Switches  
Installation and User Guide (8/99)  
Switches with two or four 4-port slots in the front, i.e., with a capacity of 8 or 16 switched  
ports. The LE1408A and LE1416A rack-mount units are typically used in larger network wiring  
centers.  
Black Box LE1401A  
P
W
R
ACT  
B
FDX/HDX  
1
2
3
4
L
K
1
2
3
4
LK  
ModularSwitches  
1
2
Figure 2.2.1a: Front view, 8-port LE1401A  
table-top, 8-port LE1408A and 16-port LE1416A  
3
4
100/10  
FDX/HDX  
8 Ports Table-Top  
Modular Switches  
PWR  
Black Box LE1408A  
ACT  
FDX/HDX  
LK  
1
2
3
4
L
K
1
2
3
4
1
ModularSwitch  
A
C
T
FDX/HDX  
2
3
4
FDX/HDX  
100/10  
8-Port Rack Mount  
PWR  
M
Black
Modular Switch  
B
oxLE1416A
FDX/HDX  
FDX/HDX  
M
1
2
3
4
FDX/HDX  
1
1
2
3
4
ACT  
1
2
3
4
ACT  
1
2
3
4
LK  
LK  
A
C
T
LK  
LK  
1
2
1
2
2
3
3
4
3
4
100/10  
FDX/HDX  
4
G
16-Port Rack Mount  
Mixed-media combination modules (4-port modules with three fiber ports and one  
twisted-pair port) are supported in all of the LE14XXA-Series Fiber Switch models. All 4Port-  
module manual-selection switches and LED’s are located on the front panel, with the IEC  
standard AC power connector (and a manual ON - OFF power switch) located at the rear. Fan  
driven cooling air flows left to right.  
ON  
O
N
110-220  
V A C  
110-220  
VAC  
47-63Hz  
47-63Hz  
1.0-0.5A  
1.0-0.5A  
OFF  
OFF  
Figure 2.2.1b: Rear view - Black Box table-top & rack-mount 4-Series Switches  
7
Download from Www.Somanuals.com. All Manuals Search And Download.  
lack Box Modular Switches  
Installation and User Guide (8/99)  
2.2 4-port modules, 100Mb fiber  
1
2
3
4
FDX/HDX  
FDX/HDX  
1
2
3
4
LK  
ACT  
1
2
3
4
ACT  
LK  
1
2
3
4
VF45-Small Form Factor  
ST-Type  
FDX/HDX  
1
2
3
4
ACT  
LK  
1
2
3
4
ACT  
FDX/HDX  
1
LK  
2
3
4
1
2
3
4
MTRJ-Small Form Factor  
SC-Type  
g.2.2.2 Fiber 4-Port Modules, LE1420C, LE1419C LE1423C LE1422C  
In a fiber 4-port module, all of the fiber ports are of the same speed, the same multi- or  
ngle-mode, and the same connector type. Multi-mode 100Mbps models are available with ST,  
C, MTRJ, and VF-45 connectors. Single-mode 100Mbps models are available with SC  
onnectors.  
The 100Mb fiber 4-port modules on the Black Box LE14XXA-Series normally are set  
actory default) to operate in full-duplex mode for best fiber distance and performance. On the  
E14XXA-Series, the user may select full- or half-duplex mode per-port with an internal jumper  
tting (See Section 3.4) for the flexibility to adapt to any type of Fast Ethernet devices.  
On Black Box fiber 4PMs, there are three LED’s per fiber port. The Link (LK) LED  
dicates “ready for operation” when lit, another LED indicates operation in full-duplex mode  
hen ON (when it is OFF, operation is half-duplex), and an LED indicates Receiving Activity  
ACT) on the port. A fiber cable must be connected to each 100Mb port and a proper link (LK  
) must be made with the device at the other end of the cable in order for the LK LEDs to  
ovide valid indications of operating conditions.  
1
2
3
4
FDX/HDX  
2.3 4-port modules, 10 Mb fiber  
LK  
ACT  
1
2
3
4
The 10 Mb model LE1424C fiber 4-port  
odule is the same as the 100Mb LE1428C, except  
r 10Mb speed rather than 100Mb speed. It  
ST-Type  
pports distances according to the 10Base-FL standard, i.e., 2Km distance for multi-mode fiber.  
ingle-mode for 10km distance may be available as a special order).  
8
Download from Www.Somanuals.com. All Manuals Search And Download.  
Black Box Modular Switches  
2.2.4 4-Port Module, RJ-45 (copper)  
The Black Box LE14XXA-  
Installation and User Guide (8/99)  
1
2
3
4
ACT  
LK  
Series copper port module, model  
LE1425C, provides four 10/100Mb  
switched. RJ-45 ports. The 10/100Mb  
100/10  
FDX/HDX  
switched ports are independently N-way auto-negotiating  
LE1425C  
for operation at 10 or 100Mb speed in full- or half-duplex mode (as a default setting). They  
independently move to half-duplex mode at 10 Mb or at 100Mb speed if the device at the other  
end of the twisted pair cable is half-duplex or is not an auto-negotiating device.  
On the model LE1425C , there are four LED’s for each port. The LK (Link) indicates  
“ready for operation” when lit, the ACT (Activity) indicates receiving activity on that port, the  
10/100 LED indicates operation at 100Mb speed when ON and at 10 Mb speed when OFF  
(when auto-negotiation is not disabled), and the FDX/HDX LED is ON to indicate full-duplex  
operation and OFF, to indicate half-duplex mode. A twisted pair cable must be connected into  
each RJ-45 10/100Mb port and a proper link (LK lit) must be made with the device at the other  
end of the cable in order for the LEDs to provide valid indications of operating conditions.  
Internal jumper settings (See Section 3.4) allow technicians to over-ride the auto-  
negotiation feature and to manually set each port at full-duplex or half-duplex. One port on each  
RJ-45 4-port module is equipped with a Media Dependent Interface-Crossover (MDI-X) push  
button switch to simplify cascaded or up-link connections.  
2.2.5  
Combo 4 Port Modules, “3 + 1”, 3 RJ-45 and 1 fiber port  
The combo 4-port modules are  
ACT  
LK  
1
2
3
4
combination of copper and fiber media,  
available as three 10/100 switched RJ-45  
copper ports and one 100Mb switched  
FDX/HDX  
FDX/HDX  
100/10  
multi-mode fiber ST or SC port or single-mode SC port.  
LE1426C  
9
Download from Www.Somanuals.com. All Manuals Search And Download.  
lack Box Modular Switches  
Installation and User Guide (8/99)  
The RJ-45 ports run at 10/100Mbps with N-way auto-negotiation capability, whereas  
e fiber port runs at 100Mbps with half- or full-duplex capability manually selected. The  
efault condition is full-duplex. Internal jumpers settings allow technicians to set the 100Mb  
ber port to half-duplex mode. (See Section 3.4).  
n LE14XXA Combo 4-port modules, there are three LED’s for each RJ-45 port, which indicate  
atus as described for the LE1426C in Section 2.2.4 above. The fiber port will run at 100Mbs  
eed at all times, and has LEDs that indicate status the same way as described for the Fiber 4-  
ort modules in Section 2.2.2 above.  
2.6  
Frame Buffering and Latency  
The Black Box LE14XXA-Series are store-and-forward switches. Each frame (or  
acket) is loaded into the Switch’s memory and inspected before forwarding can occur. This  
chnique ensures that all forwarded frames are of a valid length and have the correct CRC, i.e.,  
e good packets. This eliminates the propagation of bad packets, enabling all of the available  
andwidth to be used for valid information.  
While other switching technologies such as "cut-through" or "express" impose minimal  
ame latency, they will also permit bad frames to propagate out to the Ethernet segments  
onnected. The "cut-through" technique permits collision fragment frames, which are a result of  
te collisions, to be forwarded to add to the network traffic. Since there is no way to filter  
ames with a bad CRC (the entire frame must be present in order for CRC to be calculated), the  
sult of indiscriminate cut-through forwarding is greater traffic congestion, especially at peak  
tivity. Since collisions and bad packets are more likely when traffic is heavy, the result of  
ore-and-forward operation is that more bandwidth is available for good packets when the traffic  
ad is greatest.  
To minimize the possibility of dropping frames on congested ports, each Black-Box  
E14XXA-Series Switches dynamically allocates buffer space from an 8 MB memory pool,  
nsuring that heavily used ports receive very large buffer space for packet storage. (Many other  
witches have their packet buffer storage space divided evenly across all ports, resulting in a  
mall, fixed number of packets to be stored per port. When the port buffer fills up, dropped  
ackets result.) The other two LE14XXA-Series Switches LE1408A and LE1416A dynamically  
locates buffer from an 4MB memory pool. This dynamic buffer allocation provides the  
pability for the maximum resources of the LE14XXA-Series unit to be applied to all traffic  
ads, even when the traffic activity is unbalanced across the ports. Since the traffic on an  
perating network is constantly varying in packet density per port and in aggregate density, the  
10  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Black Box Modular Switches  
Installation and User Guide (8/99)  
LE14XXA-Series Switches are constantly adapting internally to provide maximum network  
performance with the least dropped packets.  
When the Switch detects that its free buffer queue space is low, the Switch sends  
industry standard (full-duplex only) PAUSE packets out to the devices sending packets to caus  
“flow control”. This tells the sending devices to temporarily stop sending traffic, which allows  
traffic catch-up to occur without dropping packets. Then, normal packet buffering and  
processing resumes. This flow-control sequence occurs in a small fraction of a second and is  
transparent to an observer. See Section 4.6 for additional details.  
Another feature implemented in LE14XXA--Series Switches is a collision-based flow  
control mechanism (when operating at half-duplex only). When the Switch detects that its free  
buffer queue space is low, the Switch prevents more frames from entering by forcing a collision  
signal on all receiving half-duplex ports in order to stop incoming traffic.  
The latency (the time the frame spends in the Switch before it is sent along or  
forwarded to its destination) of the LE14XXA-Series Switches varies with the port-speed type  
and the length of the frame is a variable here as it is with all store-and-forward switches. For 10  
Mb-to-10 Mb or 10 Mb-to-100Mb or 100Mb-to-10 Mb forwarding, the latency is 15  
microseconds plus the packet time at 10 Mb. For 100Mb-to-100Mb forwarding, the latency is  
microseconds plus the packet time at 100Mb.  
11  
Download from Www.Somanuals.com. All Manuals Search And Download.  
lack Box Modular Switches  
Features and Benefits  
Installation and User Guide (8/99)  
3
n
100Mb switching services for large, high performance Ethernet LANs  
LE14XXA-Series Switches provide Fast Ethernet switching on all ports. They  
perform high speed filter/forward operations on the traffic, giving each port’s  
segment a full 100Mb (or 10 Mb) of bandwidth.  
n
Configurable with fiber ports, all connector types and speeds  
4-port modules are available with 100Mb mm ST, SC, VF-45, MTRJ single-mode  
SC, and 10 Mb ST-type connectors. The configuration of the fiber ports, in the  
factory or in the field, allows the LE14XXA-Series Switches to adapt to mixed  
and changing fiber types in any application.  
n
n
Configurable with RJ-45 (copper) ports, 10/100 auto-negotiation  
RJ-45 4-port modules provide twisted pair segment connections, with N-way  
auto-negotiation or with manual speed and mode settings per port  
Mixed-media configurations for maximum flexibility  
Combinations of port module types can be configured in the same unit, adapting  
the LE14XXA-Series Switches to varying quantities and types of fiber vs. copper  
media. Port module changes can even be done in the field.  
n
Full-duplex or Half-duplex operation, auto-sensing  
All fiber and RJ-45 (copper) ports are capable of half- or full-duplex, individually  
selected. All RJ-45 ports support 10/100 auto-negotiation, or can be user-selected  
for the desired operating mode and speed.  
n
n
16-port, 12-port, 8-port and 4-port models  
With two chassis sizes (16-port and 8-port) configurable with 4-port 4PMs,  
capacity options complement the mixed-media configurability.  
Plug-and-Play installation for high performance switching  
Black Box LE14XXA-Series Switches are self-learning for node addresses.  
They can be placed into operation without complex set-up procedures, even in  
large networks. They operate transparent to system software.  
n
Front-mounted LEDs, world-wide AC power supply  
Front panel LED’s on each 4-port module display the status of each  
port for easy monitoring. An internal auto-ranging AC power supply  
allows LE14XXA Series Switches to be used throughout the world. (A 48VDC  
power supply is optional, see Appendix B).  
12  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Black Box Modular Switches  
.2.4 Applications  
Black Box LE14XXA-Series Modular Switches offer high performance and flexibility  
Installation and User Guide (8/99)  
and are easily used in a variety of applications including client/server computing, performance  
upgrades of departmental networks, and collapsed backbone applications. The Dual-Speed  
characteristic of the LE14XXA-Series Switches enables them to inter-connect a series of subnet  
(one subnet per LE14XXA-Series Switch) in a LAN traffic center. The subnet connections may  
be via either fiber or twisted pair cabling, and may be 100Mbps or 10 Mbps speed and full-or  
half-duplex mode.  
The mixed-media capability is ideal for upgrading existing Ethernet LAN networks,  
where existing cabling must be accommodated. The fiber-built-in media capability is ideal for  
integrating future-proof fiber cabling into the LAN structure.  
Example 1 : LE1401A  
In a typical 10 Mb network performance upgrade, some existing cascaded 10 Mbps  
hubs connect a group of users who share one 10 Mb traffic domain. The LE1401A 4port Series  
Switch provides eight 10/100Mb traffic domains for increased performance. It can segment 10  
Mbps and 100Mbps units, hubs and servers, in the existing network into multiple domains,  
providing greatly increased bandwidth. In this case, two 100Mb fiber connections are required t  
connect to more distant LAN centers, and a configuration with two “combo” 3@RJ-45 +  
1@fiber-built-in 4PMs is used.  
The LE1401A provides complete network connectivity so that all 10 Mb and 100Mb  
nodes operate in a unified manner, functioning as one plug-and-play switched network facility.  
It filters and forwards packets from one segment to another, containing the local traffic and  
allowing only the packets which need to be forwarded to go outside to the appropriate other  
segments. This is ideal for a central departmental switch in a high-performance LAN center.  
Figure 2.4 illustrates this example.  
Fig. 2.4a: AFTER  
LE1401A Switch  
provides central  
connectivi ty while  
maintaining full 10  
Mbps and 100Mbps  
bandwidth on each  
segment.  
ACT  
PWR  
ACT  
Black Box  
Modular Switch  
LE1416A  
LK  
LK  
100/10  
100/10  
FDX/HDX  
FDX/HDX  
100Mbps Fiber  
Segment  
100Mbps Fiber  
Segment  
Magnum800E  
1
5
Workgroup Hub PWR COL 24  
LINK  
RX  
68  
7
LINK  
RX  
100Mb/s  
GARRETT  
3
Magnum800E  
1
PWR COL 24  
3
5
68  
7
W
o
r
k
g
r
o
u
p
H
u
b
LIN  
K
LINK  
RX  
100Mb/s  
RX  
G
A
R
R
E
T
T
10 Mbps users  
100Mbps users  
13  
Download from Www.Somanuals.com. All Manuals Search And Download.  
lack Box Modular Switches  
Installation and User Guide (8/99)  
xample 2 : 8-port LE1408A  
In another application, a Switch is needed to provide a Fast Ethernet backbone. The  
ackbone consists of four high-speed LAN segments, each operating over 100MB full-duplex  
ber lines. In addition to interconnecting the fiber backbone segments in the network center, the  
witch needs to provide high-speed switched support for two central servers, for a 100MB  
onnection to a router, and for a dual-speed hub serving a local workgroup of over a dozen users,  
inters, etc.  
The LE1408A equipped with one Fiber and one RJ-45 4-port modules provides an  
onomical solution, configured with 8 switched ports (four 100Mbps fiber and four 10/100 RJ-  
5) in a rack-mount box. No Media Converters are needed. The Fiber 4PM can be selected to  
ovide any 100Mbps fiber media connector type desired. 4PMs with multi-mode or single-  
ode fiber types are available.  
This requirement for connecting local devices over twisted pair cabling is handled by  
e LE1408A using a RJ-45 4-Port Module. The 4PM provides a switched port for two local  
gh speed servers, another for the router, another for the users connecting into a 16-port dual-  
eed hub such as the LE1408A.  
Since 100Mb fiber Ethernet has severe distance limitations at half-duplex, it is  
ecessary in high speed backbones to operate fiber links in the full-duplex mode. Many low-end  
witches that only have RJ-45 N-way 10/100Mb ports would need to have a media converter on  
ch fiber line. But most media converters do not support auto-negotiation and would not enable  
e fiber backbone lines to operate full-duplex. But the LE1408A . . . with built-in switched fiber  
orts at 100Mb speed, with full-duplex mode as a default setting on fiber ports, and with some  
J-45 N-way 10/100Mb ports as well. . . handles this application readily.  
W
R
100/10  
MaP  
Black0Boxle1408a  
FModularSwitch  
LK  
ACT  
L
K
1
2
3
4
FDX/HDX  
GA
100/10  
F
D
X
/
H
D
X
Internet  
Magnum DS8016 Stackable Hub  
BR  
X
1
2
3
14  
4
5
6
7
8
9
10  
11  
P
W
R
L
K
/
R
X
15 126  
13  
15 16  
C
O
L
1
1
0
0
PORT1  
2
3
4
5
6
7
8
9
10 11 12 13 1
C
O
L
0
1
0
0
UPLINK  
Router  
100Mb Fiber Link  
segment  
100Mb Servers  
M
a
g
n
u
m
8
0
0
E
1
4
2
3
5
8
6
7
WorkgroupHub  
P
W
R
C
O
L
LINK  
RX  
LIN  
K
100Mb/s  
R
X
G
A
R
R
E
T
T
gure 2.4b: The LE1408A provides a 100Mb fiber backbone facility.  
14  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Black Box Modular Switches  
Installation and User Guide (8/99)  
Example 3 : 16-port LE1416A  
In another situation similar to Example 2 above, a larger central Switch is needed to  
provide for a 6-segment 100Mb fiber Fast Ethernet backbone, and switched copper support for  
4 high speed local servers. In addition, the router and two dual-speed hubs need switched coppe  
ports. The total is 14 ports, 6 fiber and 8 copper.  
The mixed-media flexibility of the Black-Box 4-Port Switches provides the user with  
more than one configuration in this case. The two ports not immediately used may be either fibe  
or copper. If the probable growth of the central Switch is towards more fiber backbone  
segments, then two 4-port fiber 4PMs are selected to provide 6 required fiber ports and two for  
spares and/or future backbone expansion. The 8 switched copper ports are handled with two R  
45 4-Port Modules configured into the LE1416A. Should the number of servers expand, more  
than one server can be serviced by a switched LE1416A port by using a small 4-port 100Mbps  
hub.  
If the probable growth of the central Switch is towards more local high speed servers  
and users, then one 4-port fiber 4PM is selected to provide 4 of the required fiber ports, and tw  
“combo 3 RJ-45 + 1 fiber” 4PMs are configured for the other 2 fiber ports plus 6 of the switche  
copper ports. Finally, an RJ-45 QPM is configured to provide for the remaining 2 copper ports  
plus two for spares and/or future expansion. Should the need arise to add a built-in-fiber  
backbone port in the future, the RJ-45 4PM could be removed and another “3+1 combo” 4PM  
installed in the field. Alternatively, a 100MB Media Converter (such as the LH1500A-ST-R2)  
may be used on a copper port, with internal jumpers (See Section 3.4) set to support fixed  
100MB FDX on the RJ-45 port.  
P
WR  
M
M
100/10  
100/10  
LK  
A
C
T
LK  
ACT  
LK  
A
C
T
LK  
Black-Boxle1416a  
1
1
Modular Switch  
2
2
3
3
4
4
1
FDX/HDX  
FDX/HDX  
FDX/HDX  
F
D
X
/
H
D
X
10/100  
10/100  
G
Internet  
Router  
100Mb fiber segment  
Magnum DS8016 StackablXe Hub  
1
2
3
4
5
6
7
8
9
10  
11  
PWR BR  
LK/RX  
12  
13  
14  
15 16  
C
C
O
O
L
L
1
1
0
0
P
O
R
0
1 T  
2
3
4
5
6
7
8
9
10 11 12 1
UPLINK  
15 1
0
1
0
Magnum DS8016 StackablXe Hub  
1
2
3
4
5
6
7
8
9
10  
11  
PWR BR  
LK/RX  
115 2  
13  
14  
15 16  
C
O
L
1
0
P
O
R
0
T1  
2
3
4
5
6
7
8
9
10 11 12 13
UPLINK  
16  
COL 100  
1
0
M
a
g
n
u
m
8
0
0
E
1
4
2
3
5
8
6
7
W
o
r
k
g
r
o
u
p
H
u
b
1
0
0
M
b
/
s
P
W
R
C
O
L
LR IXN  
K
LRXINK  
G
A
R
R
E
T
T
100Mb Servers  
and Workstations  
10Mb Workgroup  
100Mb Workgroup  
Fig 2.4c: LE1416A provides a 100Mb mixed-media backbone Switch.  
15  
Download from Www.Somanuals.com. All Manuals Search And Download.  
lack Box Modular Switches  
Installation  
Installation and User Guide (8/99)  
0
Before installing the equipment, it is necessary to take the  
following precautions:  
1.) If the equipment is mounted in an enclosed or multiple rack  
assembly, the environmental temperature around the equipment  
must be less than or equal to 500C.  
2.) If the equipment is mounted in an enclosed or multiple rack  
assembly, adequate air flow must be maintained for proper and  
safe operation.  
3.) If the equipment is mounted in an enclosed or multiple rack  
system placement of the equipment must not overload or load  
unevenly the rack system.  
4.) If the equipment is mounted in an enclosed or multiple rack  
assembly, verify the equipment’s power requirements to prevent  
overloading of the building/s electrical circuits.  
5.) If the equipment is mounted in an enclosed or multiple rack  
assembly verify that the equipment has a reliable and  
uncompromised earthing path.  
nstallation: This section describes installation of the LE14XXA-Series Switches, as well as  
onnection of the various Ethernet media types.  
1
Locating LE14XXA-Series Switches  
The location of a LE14XXA-Series Switch is dependent on the physical layout of the  
etwork. Typically the Switch is placed in a central wiring location where groups of network  
evices need to be connected in order to communicate with each other. These Switches are  
pically rack mounted in a wiring closet see Section 3.3.2 below), but because they have rubber  
et they can also be installed on a shelf or table top. The compact size of the 8-port LE1401A  
nit allows it to be easily placed in an office or lab area, and it can also be either shelf of wall-  
ounted (see Section 3.3.1 below).  
Locate an AC receptacle that is within six feet (2 meters) of the intended LE14XXA-  
eries site. The rugged metal case of the LE14XXA-Series will normally protect it from  
cidental damage in a lab or workplace setting. Maintain an open view of the front to visually  
onitor the status LEDs. Keep an open area around the unit so that cooling can occur from the  
mall fan on the left side, while the unit is in operation. See figure below.  
Figure 3.1: Location of 8-port LE1401A’s cooling fan exhaust  
ON  
110-220  
VAC  
47-63Hz  
OFF  
1.0-0.5A  
FAN EXHAUST  
16  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Black Box Modular Switches  
3.2 Connecting Ethernet Media  
Installation and User Guide (8/99)  
The Black-Box LE14XXA-Series Fiber Switches are specifically designed t  
support all standard Ethernet media types within a single Switch unit. This is  
accomplished by using a family of 4-port Modules (4PMs) which can be individually  
selected and configured per-port. See Section 2.4 for a description of the 4PMs.  
The various media types supported along with the corresponding IEEE 802.3 and  
802.3u standards and connector types are as follows:  
IEEE Standard  
Fiber:  
Media Type  
Max. Distance  
Port Module  
100BASE-FX  
mm1 Fiber  
sgl.m2 Fiber  
2.0km (6,562 ft) LE1428C, LE1419C  
18.0km (95K ft) LE1421C  
2.0km (6,562 ft) LE1422C, LE1423C  
2.0km(6,562 ft) LE1424C  
small form factor mm1 Fiber  
10BASE-FL  
Copper:  
10BASE-T & 100BASE-TX twisted pair 100m (328 ft)  
mm1 Fiber  
LE1425C  
1
2
mm = multi-mode  
sgl.m = single-mode  
3.2.1 Connecting Fiber Optic ST-type, “twist-lock”  
The following procedure applies to installations using a 4PM with ST-type fiber  
connectors. This procedure applies to ports using a LE1428C or LE1424C.  
1. Before connecting the fiber optic cable, remove the protective dust caps from the tips o  
the connectors on the 4PM. Save these dust caps for future use.  
2. Wipe clean the ends of the dual connectors with a soft cloth or lint-free lens tissue  
dampened in alcohol. Make certain the connectors are clean before connecting.  
Note:  
One strand of the duplex fiber optic cable is coded using color bands at  
regular intervals; you must use the color-coded strand on the associated ports at each  
end of the fiber optic segment.  
3. Connect the Transmit (TX) port (light colored post) on the 4PM to the Receive (RX)  
port of the remote device. Begin with the color-coded strand of the cable for this first TX-to  
RX connection.  
4. Connect the Receive (RX) port (dark colored post on the PM) to the Transmit (TX) po  
of the remote device. Use the non-color coded fiber strand for this.  
5. The LINK LED on the front of the 4PM will illuminate when a proper connection has  
been established at both ends (and when power is ON in the unit). If LINK is not lit afte  
cable connection, the normal cause is improper cable polarity. Swap the fiber cables at  
the 4PM connector to remedy this situation.  
17  
Download from Www.Somanuals.com. All Manuals Search And Download.  
lack Box Modular Switches  
Installation and User Guide (8/99)  
2.2  
2.3  
Connecting Fiber Optic SC-type, "Snap-In"  
The following procedure applies to installations using a 4PM with SC-type fiber  
connectors, i.e., using LE1419C, LE1421C single-mode.  
When connecting fiber media to SC connectors, simply snap on the two square male  
connectors into the SC female jacks of the 4PM until it clicks and secures.  
Connecting Single-Mode Fiber Optic  
When using single-mode fiber cable, be sure to use single-mode fiber port connectors.  
Single-mode fiber cable has a smaller diameter than multi-mode fiber cable (9/125  
microns for single-mode, 50/125 or 62.5/125 microns for multi-mode where xx/xx are  
the diameters of the core and the core plus the cladding respectively). Single-mode fiber  
allows full bandwidth at longer distances, and may be used to connect 10 Mb nodes up  
to 10 Km apart, or 18Km with the LE1421C.  
The same procedures as for multi-mode fiber applies to single-mode fiber connectors.  
Follow the steps listed in Section 3.2.2 above.  
2.4  
Connecting Twisted Pair (RJ-45,CAT3, CAT5, Unshielded or Shielded)  
The RJ-45 ports of the LE14XXA-Series can be connected to the following two media  
types: 100BASE-TX and 10BASE-T. CAT 5 cables should be used when making  
100BASE-TX connections. When the ports are used as 10BASE-T ports, CAT 3 may  
be used. In either case, the maximum distance for unshielded twisted pair cabling is  
100 meters (328 ft).  
Media  
IEEE Standard  
10BASE-T  
Connector  
RJ-45  
Twisted Pair (CAT 3, 4, 5)  
Twisted Pair (CAT 5)  
100BASE-TX  
RJ-45  
OTE : It is recommended that high quality CAT. 5 cables (which work for both 10 Mb and  
100Mb) be used whenever possible in order to provide flexibility in a mixed-speed  
network, since dual-speed ports are auto-sensing for either 10 and 100Mb/s.  
The following procedure describes how to connect a 10BASE-T or 100BASE-TX  
twisted pair segment to the RJ-45 port. The procedure is the same for both unshielded  
and shielded twisted pair cables.  
18  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Black Box Modular Switches  
Installation and User Guide (8/99)  
1. Using standard twisted pair media, insert either end of the cable with an RJ-45 plug into  
the RJ-45 connector of the port. Note that, even though the connector is shielded, either  
unshielded or shielded cables and wiring may be used.  
2. Connect the other end of the cable to the corresponding device  
3. Use the LINK LED to ensure proper connectivity by noting that the LED will be  
illuminated when the unit is powered and proper connection is established.  
3.3  
Table-Top or Shelf Mounting  
The LE14XXA-Series Switches can be easily mounted on a table-top or any suitable  
horizontal surface, and has four rubber feet to provide stability without scratching finished  
surfaces.  
3.3.1  
Wall (or Vertical Surface) Mounting, 8-port LE1401A  
Each LE1401A Switch is shipped with two metal mounting brackets (and screws) to  
allow the unit to be mounted in nearly any desired orientation or position. The brackets are  
attached to the metal hub case using one of the metal screws for each bracket, and attached to th  
LE1401A through the round hole of the bracket. A user-supplied screw attaches the bracket to  
the mounting surface. It is recommended that the mounting brackets be attached to two opposit  
corners of the unit. When properly attached, the brackets will extend slightly below the base of  
the unit to allow clearance for the rubber feet and for cooling fan exhaust space.  
Black Box LE1401A  
Modular Switch  
GARRETT  
Proper mounting  
bracket attachment  
Magnum LE1401A, optional  
mounting brackets  
Figure 3.1: LE1401A, metal mounting brackets  
3.3.2  
Rack-mounting, models LE1408A and LE1416A  
Installation of a LE1408A and LE1416A Mixed-Media Fiber Switch in a 19” rack is  
simple procedure. The units are 1U (1.75”) high. When properly installed, the front-mounted  
LED status indicators should be in  
plain  
P
W
R
MBlack
B
ox  
L
E1416A  
100/10  
100/10  
M
LK  
ACT  
1
LK  
AC  
T
T
1
LK  
ACT  
1
2
3
4
F
LK  
ACT  
ModularSitc
w
h
2
3
4
F
2
3
4
100/10  
FDX/HDX  
D
X
/
H
D
X
FDX/HDX  
D
X
/
H
D
X
G
19  
Download from Www.Somanuals.com. All Manuals Search And Download.  
lack Box Modular Switches  
Installation and User Guide (8/99)  
ew and easy to read. Rack-mount installation requires special rack-mounted brackets and  
rews (included with each LE1408A and LE1416A unit). The brackets attach to the front sides  
the Switch, which is then fastened into a standard 19” rack.  
4
RJ-45 ports, internal jumper settings for 10/100Mb (auto-negotiation) or for  
xed Half- or Full-Duplex 100Mb, per port  
The factory (or default) setting is for auto-negotiation on all RJ-45 ports, which is generally  
opular. It works well under most circumstances, but cannot always be  
Jumper Settings for Auto-Negotiation, or for 100MB Half or Full Duplex  
Jumper  
Port  
Function  
Factory Settings  
Speed  
JP2-3,6-7, 10-11  
JP1-2, 6-7, 9-10  
Pin 2-3,6-7,10-11 Auto-Negotiation  
FDX @100 config  
YES  
10/100 Mb,  
100 Mb  
NO  
Pin 1-2, 6-7, 9-10  
100 Mb  
JP1-2, 7-8, 11-12 Pin 1-2, 7-8, 11-12 HDX@100 config  
NO  
1
100Mbps Full  
100Mbps Half  
Factory Settings  
10/100 Mbps  
Duplex  
Duplex  
Auto Negotiation  
J1  
J1  
J1  
100 Mb  
100 Mb  
10/100 M
AUTO  
1
2
3
1
2
3
4
4
1
2
3
4
9
5
10 11 12  
J1  
6
7
3
8
1
2
4
Jumper Settings for HDX/FDX  
and Auto Negotiation  
Bottom QPM Retaining  
J1 J2  
J3  
J4  
Printed Circuit card  
Two(50) Pin  
QPM Connectors  
(inserts into main board)  
TOP  
Uplink  
Switch  
LED  
FRONT  
gure 3.4. RJ-45 ports, internal jumper settings. Note: Be certain that the main power is  
sconnected before opening the unit or changing any internal jumper settings.  
epended upon to work as expected. If auto-negotiation will not function properly in your  
tup, internal jumpers allow the speed and mode of the LE14XXA-Series RJ-45 (copper) 4-  
orts to be fixed, even if the attached device may or may not support auto-negotiation. This is  
esirable when there are unknown devices presently or potentially connected, which will not  
perate correctly with auto-negotiation. Examples include some NICs and most Media  
onverters.  
20  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Black Box Modular Switches  
Installation and User Guide (8/99)  
Therefore, the default setting of auto-negotiation (copper ports) is generally desirable  
because it is widely used and allows for the connection of various devices without re-  
configuration. Under certain conditions,(where the connected device is full duplex and does not  
support Auto-negotiation; or the connected device does not support Auto-negotiation properly  
no auto-negotiation is better and the internal jumper settings will permit this to be selected on a  
per-port basis.  
See Section 4.4 for additional information on auto-negotiation functionality.  
3.5 Fiber ports, internal jumper settings for 100Mb fixed Half- or Full-Duplex, per port  
The factory (or default) setting is for full-duplex on all fiber 100Mbps ports, which is generally  
popular. It works well under most circumstances, but cannot always be depended upon to work  
as expected. If full-duplex will not function properly in your setup, internal jumpers allow the  
speed and mode of the LE14XXA-Series fiber 4-ports to be  
Jumper Settings for 100Mbps Fiber Half or Full Duplex  
Function  
Factory Settings  
Speed  
Jumper  
Port  
JP1-2, 6-7, 9-10  
JP1-2, 7-8, 11-12  
Pin 1-2, 6-7, 9-10  
Pin 1-2, 7-8, 11-12  
FDX @100 config  
HDX@100 config  
YES  
100 Mb  
100 Mb  
NO  
1
100Mbps Full  
100Mbps Half  
Duplex  
Factory Settings  
Duplex  
J1  
J1  
100 Mb  
100 Mb  
1
2
3
1
2
3
4
4
9
5
10 11 12  
J1  
6
7
8
1
2
3
4
Jumper Settings for HDX/FDX  
Bottom QPM Retaining  
Two(50) Pin  
J1  
J2  
J3  
J4  
Printed Circuit card  
QPM Connectors  
TOP  
(inserts into main board)  
LED  
1
2
3
4
Figure 3.5. Fiber ports, internal jumper settings. Note: Be certain that the main power is  
disconnected before opening the unit or changing any internal jumper settings  
21  
Download from Www.Somanuals.com. All Manuals Search And Download.  
lack Box Modular Switches  
Installation and User Guide (8/99)  
xed, even if the attached device may or may not support full-duplex. This is desirable when  
ere are unknown devices presently or potentially connected, which will not operate correctly  
ith full-duplex. Examples include hubs which support only half-duplex by default.  
Therefore, the default setting of full-duplex (fiber ports) is generally desirable because  
is widely used and allows for the connection of various devices without re-  
onfiguration(specially along with switches). Under certain conditions,(where the connected  
evice is half duplex and does not support full-duplex; or the connected device does not support  
ll-duplex properly) no full-duplex is better and the internal jumper settings will permit this to  
e selected on a per-port basis.  
6
Combo(3+1) ports, internal jumper settings for 10/100 RJ-45 Auto-Negotiation  
or 10 or 100Mb or for fixed Half- or Full-Duplex 100Mb, per port  
The factory (default) setting is Auto-Negotiation on all RJ-45 ports and full-duplex on  
fiber 10 Mbps or 100Mbps ports, which is generally  
Jumper Settings for 10/100Mbps RJ-45 Auto-Negotiation,10 or 100Mbps RJ-45 & Fiber Half or Full Duplex  
Factory Settings  
Jumper  
Port  
Speed  
Function  
10/100 Mb  
JP2 -3, 6-7, 10-11  
JP1-2, 6-7, 9-10  
JP1-2, 7-8, 11-12  
Pin 2-3, 6-7, 10-11 Auto-Negotiation  
YES  
YES  
NO  
Pin 1-2, 6-7, 9-10 FDX @100 config  
10 Mb or 100 Mb  
10Mb or 100 Mb  
Pin 1-2, 7-8, 11-12  
HDX@100 config  
1
10 or100Mbps Full  
10/100 Mbps  
Auto Negotiation  
10 or100Mbps Half  
Duplex  
Factory Settings  
Duplex  
J1  
J1  
J1  
100 Mb  
100 Mb  
10/100 Mb  
For RJ-45 ports only  
1
2
3
1
2
3
4
1
2
3
4
AUTO  
For RJ-45 &  
Fiber port  
For RJ-45 &  
Fiber port  
9
5
10 11 12  
J1  
6
7
3
8
4
1
2
Jumper Settings for HDX/FDX  
Bottom QPM Retaining  
J1  
J2  
J3  
J4  
Printed Circuit card  
Two(50) Pin  
QPM Connectors  
TOP  
(inserts into main board)  
1
LED  
2
3
4
gure 3.6 Combo ports, internal jumper settings. Note: Be certain that the main power is  
sconnected before opening the unit or changing any internal jumper settings  
opular. Auto-Negotiation on RJ-45 and FDX on fiber port works well under most  
rcumstances, but cannot always be depended upon to work as expected. If full-duplex will not  
nction properly in your setup, internal jumpers allow the speed and mode of the LE14XXA-  
22  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Black Box Modular Switches  
Installation and User Guide (8/99)  
Series Combo- 4ports to be fixed, even if the attached device may or may not support full-  
duplex. This is desirable when there are unknown devices presently or potentially connected,  
which will not operate correctly with full-duplex. Examples include hubs that support only hal  
duplex by default.  
If auto-negotiation will not function properly in your setup, internal jumpe  
allow the speed and mode of the LE14XXA-Series RJ-45 (copper) 4-ports to be fixed, even if  
the attached device may or may not support auto-negotiation. This is desirable when there are  
unknown devices presently or potentially connected, which will not operate correctly with  
auto-negotiation. Examples include some NICs and most Media Converters.  
3.7  
Fiber 10Mb ports, internal jumper settings for 10Mb fixed Half- or Full-Duplex  
at all ports  
The factory (default) setting is for half-duplex on all fiber 10Mbps ports,  
which is generally popular. HDX works well under most circumstances. If half-duplex on  
10Mbps will not function properly in your setup, internal jumpers allow the duplex mode of th  
LE14XXA-Series fiber 4- ports to be changed, even if the attached device supports full-duplex.  
This is desirable when there are devices connected which will not operate correctly with half-  
duplex. Examples include Switches that support full-duplex only.  
Jumper Settings for 10Mb Fiber Half or Full Duplex  
Function  
Factory Settings  
Speed  
10 Mb  
Jumper  
Port  
OPEN  
OPEN  
FDX @10Mb config  
NO  
JP3  
10 Mb  
10Mb  
10Mb  
JP3 JP2-4  
Pin 2-4  
HDX@10Mb config  
YES  
NO  
JFD1  
PIN 1-3  
FDX@10Mb config  
JP1-3  
JFD1 OPEN  
OPEN  
HDX @10Mb config  
YES  
1
10Mbps Full  
Duplex  
10Mbps Half Duplex  
JFD1  
JFD1  
1
2
JF3  
JF3  
Factory Settings  
1
2
3
4
3
4
Factory Settings  
10Mbps Full-  
Duplex  
10Mbps Half-  
Duplex  
JF3  
10 Mb  
10 Mb  
2
1
3
4
5
6
JFD1  
7
8
1
2
3
4
Printed Circuit card  
Bottom QPM Retaining  
Two(50) Pin  
JF3  
TOP  
JFD1  
4PM Connectors  
(inserts into main board)  
Jumper Settings for HDX/FDX  
Jumper Settings for HDX/FDX  
LED  
23  
Download from Www.Somanuals.com. All Manuals Search And Download.  
lack Box Modular Switches  
Installation and User Guide (8/99)  
Figure 3.7 10Mbps Fiber ports internal jumper settings.  
ote: Be certain that the main power is disconnected before opening the unit or changing any  
ternal jumper settings  
herefore, the default setting of half-duplex ( fiber ports) is generally desirable because it is  
idely used and allows for the connection of various devices without re-configuration.(where the  
onnected device is half duplex and does not support full-duplex i.e., Hub and media-converters.)  
ote: For 10Mbps fiber ports, the user can set the jumpers either at full-duplex or half duplex on  
l the four ports. There is no individual port duplex options for 10 Mb port.  
8
Powering the LE14XXA-Series Switch  
The Black-Box LE14XXA-Series Switches incorporate an internal universal power  
pply, and has a recessed male IEC connector for the AC power cord at the left-rear. A manual  
ower ON-OFF switch is adjacent. A six-foot 115 VAC 60 Hz standard power cord is supplied  
ith each unit shipped within the United States and Canada.  
Figure 3.5: LE14XXA-Series  
ON  
110-220  
AC power connector  
VAC  
47-63Hz  
1.0-0.5A  
OFF  
The auto-ranging power supply supports installation environments where the AC  
oltage is from 90 to 260 volts with a power input frequency of between 47 and 63 Hz. The 8-  
ort units will consume just under 20 watts of power typically, and the 16-port units will  
onsume about 35 watts typically.  
When connecting the Ethernet cabling, there is no need to power down the unit.  
dividual segments can be connected or disconnected without concern for AC power-related  
oblems or damage to the unit.  
Power supply options are available to suit the LE14XXA-Series Switches to special  
gh-availability communications and/or heavy industrial-grade applications, including:  
*
*
-48VDC with single DC input,  
-48VDC with dual-source DC input,  
* -48VDC with dual redundant internal power supply units and dual-source DC input,  
*
AC with dual redundant internal power supply units and dual-source AC input  
24  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Black Box Modular Switches  
Installation and User Guide (8/99)  
See the Appendices of this manual for more details. Use an RFQ for other variations.  
25  
Download from Www.Somanuals.com. All Manuals Search And Download.  
lack Box Modular Switches  
4 Port Module (4PM) Installation  
Installation and User Guide (8/99)  
9
The LE14XXA-Series Modular Switches are normally received from the factory with  
l required 4PM modules installed. There may be situations where 4PM cards need to be added  
replaced. In cases where additional 4PM cards are needed, the face plate for an available front-  
ounted slot must be removed. The following procedure describes this operation.  
9.1  
Preparation for Installing and Removing 4PMs  
STOP!!!  
Be sure the power cord is unplugged  
from the chassis before attempting to remove  
and/or replace any 4PM cards.  
Failure to do so may result in damage to the unit  
and will void the warranty.  
aution- Avoid Static Discharge: The port modules (like most electronic equipment)  
are sensitive to static discharge. Use proper ESD measures when handling port  
modules.  
ep 1. Make sure the 4PM Card package has all necessary accessories to install it properly.  
The 4PM Card package for field installation comes along with a 4PM Card, two 7/16  
stand-offs , two #4-40 Pan-Head screws, two #4-40 black color Flat-head screws and  
two Headers pin.  
ep 2. Remove Chassis Cover  
The LE14XXA-Series chassis are combined with top and bottom part and assembled  
gether with the help of 20 Philips head screws. There are 7 screws located on front-top of the  
nit and three screws each on the left and right edges. Remove these screws. Once these are  
moved, the top cover is easily lifted off the chassis base. When the chassis top cover has been  
moved, the interior of the unit  
20 Phillips Head Screws on Top  
exposed.  
gure 3.9.1a: Removing  
hassis Cover  
TopChassis Cover  
Magnum QS5116  
Fiber Switch  
GARRETT  
Caution: Be careful not to disturb the power supply.  
26  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Black Box Modular Switches  
Installation and User Guide (8/99)  
Looking down into the LE14XXA-Series unit, notice that there are individual 4PM  
connector sockets along with two stand-offs for each 4PM card position. There are four 4PM  
slots located on the front of the LE1416Amodel, whereas LE1401A and LE1408A has two 4PM  
slots in the front. (See Figure 3.9.1b).  
AC Power Input  
Back of Unit  
Power Supply Board  
Cooling Fan  
Left  
Side  
Right  
Side  
LED Status Slot  
Eight QPM Slots  
Front of Unit  
Figure 3.9.1b: LE1416A, Top View with Chassis Cover  
Step 3. Remove bottom-front and modules rear top Retaining Screws in any 4PM or  
Face Plates  
On the bottom-front of the unit, there are two retaining screws for each 4PM card slo  
as well as two other retaining screws on the rear top of the module. These four screws are used  
to secure a 4PM face plate in position. These screws are also used to secure the individual 4PM  
cards, which can be subjected to significant forces from the attached cables. (See Figure 3.9.1c)  
Two retaining screws on the rear top of  
module  
4PM CARDS  
J1 J2  
Printed CircJ4uit card  
J3  
MagnumQS5116  
Fiber Switch  
TOP  
GARRETT  
Magnum QS5116  
Fiber Switch  
1
G
A
R
R
E
T
T
Two Bottom retaining Screws for each QPM card  
Figure 3.9.1c: Front View - 4PM Retaining  
Screws hold Face Plates  
27  
Download from Www.Somanuals.com. All Manuals Search And Download.  
lack Box Modular Switches  
Installation and User Guide (8/99)  
9.2  
Installing 4PM Cards in the LE14XXA-Series  
Up to four front-mounted 4PM cards may be installed in one LE1416A Fiber Hub  
unit. Follow these steps to install a 4PM.  
ep 1. Remove top chassis cover. See procedure in Section 3.9.1 above.  
ep 2. Screw down tightly the two 7/16 stand-offs on the top of pre installed stand-offs from  
the factory.  
ep 3. Align the two headers pin on the top of the two sets of socket fixed at the bottom side  
of the 4PM module. (Note: After firmly attached the sockets and the header pin, move  
the mounted pins slightly tilted towards the front of the chassis.  
Jumper Settings for HDX/FDX  
and Auto Negotiation  
ep 4. The figure here illustrates the  
basic layout of an individual 4PM  
card. Each 4PM card fits into the  
selected 4PM connector socket  
slot. Align the connector pins on  
the bottom of the 4PM card with  
the connector socket inside the unit.  
J1  
J2  
J3  
J4  
Printed Circuit card  
Two Set of Ten(10) Pin  
4PM Connector  
(inserts into main board)  
TOP  
Uplink  
Switch  
LED  
FRONT  
ep 5. Be sure the 4PM front panel is guided into the front slot cut-out first and then  
precisely aligned the header pins with the holes in the socket slot mounted on the  
board. Slowly and carefully apply enough pressure on both rear corner of 4PM  
Module to insert the 4PM card’s pins into position. A click sound will determine the  
proper lockup of the two, see Figure 3.9.2b. (If you force the 4PM down when the  
pins are not properly aligned with the holes in the header, the pins will become bent  
and the 4PM is damaged).  
ep 6. Once inserted, the 4PM card will be secured by the header connector, the front panel  
port slot cut-out, and retaining screws. Use #4-40 Pan Head retaining screws to secure  
the module rear part and #4-40 Flat Head (Black color) retaining screws for front panel.  
NOTE: If a 4PM is difficult to install, try it in another port slot. Some of the port  
modules may fit easily in one port slot and be very hard to install in another.  
28  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Black Box Modular Switches  
4PM CARDS  
Installation and User Guide (8/99)  
Figure 3.9.2a:  
J1 J2  
Printed CirJc4uit card  
J3  
Inserting  
4PM Cards  
into a  
TOP  
Magnum QS5116  
Fiber Switch  
GARRETT  
LE1416A  
NOTE: All 4PM slots need not be filled in order for the LE14XXA-Series unit to be  
operational. When leaving 4PM slots empty, always use a face plate ( 4PM-FP) to  
cover the slot opening in the front panel. This will maintain proper cooling air flow  
safety, and operation as required by FCC, CE, and other regulations.  
Step 7. The figure below shows the top view of 4PM Card after successfully installed the 4PM  
cards inside the LE1416A.  
AC Power Input  
Back of Unit  
Power Supply Board  
Cooling Fan  
Right  
Side  
Left  
Side  
Four QPM Slots  
Front of Unit  
Fig. 3.9.2b Top View : 4PM Module Installed inside a LE1416A  
Step 8. Once all 4PM cards have been installed (including face plates for empty slots), the  
chassis cover should be replaced.  
3.9.3  
Removing 4PM Cards  
To properly remove a 4PM card from the Fiber Switch, follow the 3 steps  
below  
Step 1. Remove chassis cover  
See procedure in Section 3.9.1 above.  
Caution: Be sure the power cord is unplugged.  
Step 2. Remove bottom-front retaining screws for the 4PM and Face Plate  
29  
Download from Www.Somanuals.com. All Manuals Search And Download.  
lack Box Modular Switches  
Installation and User Guide (8/99)  
On the bottom-front of the unit there  
are two retaining screws for each 4PM card and face plate slot. These screws are used  
to secure a 4PM card in position (see Figure 3.9.3a). Remove the front screws first  
and then screw mounted on the rear-top of the 4PM to be removed.  
Two retaining screws on the rear top of  
module  
4PM CARDS  
J1 J2  
J4  
J3  
MagnumQS5116  
Fiber Switch  
Printed Circuit card  
GARRETT  
TOP  
Magnum QS5116  
Fiber Switch  
1
Two Bottom retaining Screws for each QPM card  
GARRETT  
Figure 3.9.3a: Front View - Face Plate & 4PM Retaining Screws  
ep 3. Remove 4PM Card  
Gently pull the 4PM card up and out of the connector socket (see Figure 3.9.3b).  
J1  
J4  
J2  
J3  
Printed Circuit card  
4PM CARDS  
TOP  
Magnum QS5116  
Fiber Switch  
1
GARRETT  
Figure 3.9.3b: Removing a 4PM Card  
If the slot from which the 4PM card has been removed is to remain unused, be sure to  
install a 4PM face plate cover in it. If another 4PM card is replacing the one that has  
been removed, follow the steps as described for installing a 4PM card discussed in  
Section 3.9.1.  
30  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Black Box Modular Switches  
Installation and User Guide (8/99)  
4.0  
OPERATION  
This chapter describes the functions and operation of the LE14XXA-Series.  
4.1  
Switching Functionality  
A LE14XXA-Series provides switched connectivity at Ethernet wire-speed among all  
of its ports. The LE14XXA-Series supports10/100Mbs for copper media and 10 or 100Mb  
separate traffic domain for fiber port to maximize bandwidth utilization and network  
performance. All ports can communicate to all other ports in a LE14XXA-Series, but local  
traffic on a port will not consume any of the bandwidth on any other port.  
LE14XXA-Series units are plug-and-play devices. There is no software configuring t  
be done at installation or for maintenance. The only hardware configuration settings are user  
options for UP-LINK on RJ-45 4-port. Half / Full duplex mode and 10 or 100Mbps selection f  
the switched ports can be done through jumper settings inside the unit. The internal functions o  
both are described below.  
Filtering and Forwarding  
Each time a packet arrives on one of the switched ports, the decision is taken to either  
filter or to forward the packet. Packets whose source and destination addresses are on the same  
port segment will be filtered, constraining them to one port and relieving the rest of the network  
from processing them. A packet whose destination address is on another port segment will be  
forwarded to the appropriate port, and will not be sent to the other ports where it is not needed  
Traffic needed for maintaining the operation of the network (such as occasional multi-cast  
packets) are forwarded to all ports.  
The LE14XXA-Series Switches operate in the store-and-forward switching mode,  
which eliminates bad packets and enables peak performance to be achieved when there is heavy  
traffic on the network.  
Address Learning  
All 16-port LE14XXA-Series units have address table capacity of 24K node addresse  
(12K for 8-port models), suitable for use in large networks. They are self-learning, so that as  
31  
Download from Www.Somanuals.com. All Manuals Search And Download.  
lack Box Modular Switches  
Installation and User Guide (8/99)  
odes are added or removed or moved from one segment to another, the 4-Port Switch  
utomatically keeps up with node locations.  
An address-aging algorithm causes least-used addresses to fall out in favor of new  
equently-used addresses. To reset the address buffer, cycle power down-and-up.  
2
Status LEDs  
For all LE14XXA-Series models :  
PWR  
LK  
ACT  
F/H  
: Power LED, ON when AC power is applied to the unit.  
: Steady ON, Link status for 10 Mbps and 100Mbps operation.  
: ON with port activity for 10 Mbps and 100Mbps operation.  
: Full / Half duplex LED, ON when the port is running full duplex, OFF  
for half duplex.  
100/10  
: Speed LED, ON when the speed is 100Mbps , OFF when the speed is  
10 Mbps  
3
Up-link push-button, for RJ-45 4-port only  
1
2
3
4
ACT  
LK  
Figure 4.3 : Up-link push-  
utton on RJ-45 4-port  
The unit has a manual Up-link  
100/10  
FDX/HDX  
ush-button, located on the front panel next to 10/100Mb RJ-45 4-port # 1 which it controls. It  
nables the port’s cable to either connect to a user station node (push in) or to be cascaded (push  
ut) to a 10/100Mb repeater or switching hub in the network. Verify proper Up-link push-  
utton position by noting Port 1’s LK (link) LED status, which is illuminated when a proper  
nk is made.  
.4  
Auto-negotiation, for Fast Ethernet copper ports  
The LE14XXA-Series Fast Ethernet copper ports can be set for either fixed 100Mb  
eed or for 10/100 F/H N-way auto-negotiation per the IEEE802.3u standard. The selection is  
ade via an internal jumper (see Section 3.4 for jumper-setting instructions). The factory default  
tting is for auto-negotiation. At 100Mb-fixed speed, the user may select half- or full-duplex  
ode by internal jumpers for each RJ-45 port separately.  
32  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Black Box Modular Switches  
Installation and User Guide (8/99)  
One frequently-used application for the 4-Port-Switch copper ports is to connect one  
of them using a fiber media converter to another Switch in the network backbone, or to some  
other remote 100Mb device. In this case, it is desirable to operate the fiber link at 100Mb spee  
and at either half- or full duplex mode depending on the capabilities of the remote device.  
Standard commercially-available Fast Ethernet media converters mostly do not support auto-  
negotiation properly, and require that the switched port to which they are connected be at  
100Mb fixed speed. Attachment to 10/100 auto-negotiation ports typically will not work  
properly. The 4-Port-Switch’s RJ-45 ports handle this situation by changing the internal jump  
settings. (see Section 3.4)  
When 4Port-Switch’s RJ-45 copper ports are set for auto-negotiation and connected  
an another auto-negotiating device, there are 4 different speed and F/H modes selection dependin  
on what the other device supports. These are: (1) 100Mb full-duplex, (2) 100Mb half-duplex, (  
10 Mb full-duplex and (4) 10 Mb half-duplex.  
The auto-negotiation logic will attempt to operate in descending order and will normally arrive a  
the highest order mode that both devices can support at that time. (Since auto-negotiation is  
potentially an externally-controlled process, the original “highest order mode” result can change  
at any time depending on network changes that may occur). If the device at the other end is no  
an auto-negotiating device, the 4Port-Switch’s RJ-45 ports will try to detect its idle signal to  
determine 10 or 100 speed, and will default to half-duplex at that speed per the IEEE standard.  
General information -  
Auto-negotiation per-port for 802.3u-compliant switches occurs when:  
the devices at both ends of the cable are capable of operation at either 10 Mb or  
100Mb speed and/or in full- or half-duplex mode, and can send/receive auto-  
negotiation pulses, and . . .  
-- when the second of the two connected devices is powered up*, i.e., when  
LINK is established for a port, or  
-- when LINK is re-established on a port after being lost temporarily.  
33  
Download from Www.Somanuals.com. All Manuals Search And Download.  
lack Box Modular Switches  
Installation and User Guide (8/99)  
·
NOTE some NIC cards only auto-negotiate when the computer system that they  
are in is powered up. These are exceptions to the “negotiate at LINK – enabled” rule  
above, but may be occasionally encountered.  
When operating in 100Mb half-duplex mode, cable distances and hop-counts may be  
mited within that collision domain. The Path Delay Value (PDV) bit-times must account for all  
evices and cable lengths within that domain. For Black Box LE14XXA-Series Fast Ethernet  
witched ports operating at 100Mb half-duplex, the bit time delay is 50BT.  
5
Auto-negotiation for 10 Mb ports, half- or full-duplex mode  
Full-duplex Ethernet provides separate Transmit and Receive data paths, enabling  
multaneous bi-directional collision-free data movements on a port. The network topology must  
e a “star” type, not a “bus” type. With full-duplex mode, the cable distance is only limited by  
e physical layer line driver and cable attenuation. There are no collision-domain restrictions or  
mitations.  
The LE14XXA-Series Switches perform half- or full-duplex mode auto-negotiation  
dependently on all switched ports. If the device or node on the other end of a port’s attached  
ble supports F/H mode auto-negotiation or is set to operate as full-duplex, the 4-Port Switch  
ill negotiate to run full-duplex. If the attached device or node doesn’t support F/H mode auto-  
egotiation (for example, if it is a 10 Mb repeater or a standard 10 Mb hub), the 4-Port-Switch’s  
J-45 ports will default to operate at half-duplex.  
6
Flow-control, IEEE 802.3x standard  
Black-Box LE14XXA- Series Switches incorporate a flow-control mechanism for Full-  
uplex mode. The purpose of flow-control is to reduce the risk of data loss if a long burst of  
tivity causes the switch to save frames until its buffer memory is full. This is most likely to  
ccur when data is moving from a 100Mb port to a 10 Mb port, and the speed difference makes  
e 10Mb port unable to keep up. It can also occur when multiple 100Mb ports are attempting  
transmit to one 100Mb port, and in other protracted heavy traffic situations.  
LE14XXA-Series Fiber Switches implement the 802.3x flow control (non-blocking) on  
ull-Duplex ports, which provides for a “PAUSE” packet to be transmitted to the sender when  
e packet buffer is nearly filled and there is danger of lost packets. The transmitting device is  
ommanded to stop transmitting into the 4-switch port for sufficient time to let the Switch  
34  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Black Box Modular Switches  
Installation and User Guide (8/99)  
reduce the buffer space used. When the available free-buffer queue increases, the Switch will sen  
a “RESUME" packet to indicate the transmitter to start sending the packets. Of course, the  
transmitting device must also support the 802.3x flow control standard in order to communicate  
properly during normal operation.  
Note: When in Half-Duplex mode, the Modular-switch implements a back-  
pressure algorithmon 10/100 Mb ports for flow control. That is, the switch prevents  
frames from entering the device by forcing a collision indication on the half-duplex  
ports that are receiving. This temporary “collision” delay allows the available buffer  
space to improve, as the switch catches up with the traffic flow.  
4.7  
Power Budget Calculations for LE14XXA-Series 4PM’s with Fiber Media  
Receiver Sensitivity and Transmitter Power are the parameters necessary to compute  
the power budget. To calculate the power budget of different fiber media installations using  
LE14XXA models, the following equations should be used:  
OPB (Optical Power Budget) = PT(min) - PR(min)  
where PT = Transmitter Output Power, and PR = Receiver Sensitivity  
Worst case OPB = OPB - 1dB(for LED aging) - 1dB(for insertion loss)  
Worst case distance = {Worst case OPB, in dB} / [Cable Loss, in dB/Km]  
where the “Cable Loss” for 62.5/125 and 50/125mm (M.m) is 2.8 dB/km,  
and the “Cable Loss” for 100/140 (Multi-mode) is 3.3 dB/km,  
and the “Cable Loss” for 9/125 (Single-mode) is 0.5 dB/km  
The following data has been collected from component manufacturer’s (HP’s and Siemens’) we  
sites and catalogs to provide guidance to network designers and installers.  
Fiber Speed,  
Port  
Module  
Std. Wave Cable X’mitr R’cvr Wors Worst* typica typical*  
km  
-
Size Outpu Sens.  
t
distanc  
l
distanc  
e
Mode  
Std.  
fdx lengt mm  
t
PR OPB, e Km, OPB,  
(hdx)  
h
PT , dB ,dB dB  
fdx  
dB Km, fdx  
nm  
62.5/12 -15.0 -31  
14  
5
17  
23.5  
13.5  
6
7
4.8  
LE1424C 10 Mb Multi-  
mode  
2
(2)  
850  
5
-9.5 -31 19.5 5.9  
FL  
100/14 -19.5 -31 9.5  
3.4  
0
50/125  
LE1428C 100Mb Multi-  
2
62.5/12 -20  
-31 9.0  
2.5  
2.0  
14  
12  
5
4
1300  
FX  
mode (0.4)  
5
-23.5 -31 5.5  
50/125  
100Mb Single- 18+  
LE1421C  
LE1422C  
1300 9/125 -15  
-31 14  
28  
17.5  
35  
FX  
mode (0.4)  
100Mb Multi-  
2
62.5/12 -20  
1300  
-31 9.0  
3.0  
2.0  
15.8  
12.2  
5.5  
4.0  
FX  
mode (0.4)  
5
-23.5 -31 5.5  
50/125  
35  
Download from Www.Somanuals.com. All Manuals Search And Download.  
lack Box Modular Switches  
Installation and User Guide (8/99)  
-31 15 16 5.7  
2
100Mb Multi-  
1422C  
1300 62.5/12 -14  
5
5
(0.4)  
FX  
mode  
Note: The use of either multi-mode or single-mode fiber to operate at 100Mbps speed over  
long distances (i.e., in excess of approx. 400 meters) can be achieved only if the  
following factors are both applied:  
·
The 100Mb fiber segment must operate in full-duplex (FDX) mode, i.e. the full-duplex  
(factory default) setting for 100Mbps fiber ports must be used, and  
The worst-case OPB of the fiber link must be greater than the fiber cable’s passive  
Attenuation.  
·
(Attenuation = Cable loss + LED aging loss + Insertion loss + safety factor)  
0
1
Introduction - LE14XXA-Series 4-Port Modules(4PM)  
This chapter describes each 4-Port Module (4PM), including appearance,  
functionality, and status displays.  
Inspecting the Package and Product  
This section applies only to 4PMs shipped as separate items, i.e., 4PMs not factory  
installed in a LE14XXA-Series 4PM slot.  
Examine the shipping container for obvious damage prior to installing a 4PM; notify  
the carrier of any damage which you believe occurred during shipment or delivery.  
Inspect the contents of this package for any signs of damage and ensure that the items  
listed below are included.  
This package should contain:  
One or more 4PMs.  
Installation instructions, with illustrations  
Remove the 4PM(s) from the shipping container. Be sure to keep the shipping container  
should you need to ship any of the 4PMs separately at a later date.  
In the event there are items missing or damaged contact your supplier. If you need to  
return the unit, use the original shipping container if possible. Refer to Chapter 5 for  
specific return procedures.  
2
Product Description  
36  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Black Box Modular Switches  
Installation and User Guide (8/99)  
An important feature of the LE14XXA-Series is the use of 4-Port Modules (4PMs)  
and for flexible mixed-media connectivity to RJ-45 and fiber media use of Combo 4-  
port module. Since the LE14XXA-Series have dual-speed capability for copper-port,  
the front port slots are designed to support all standard Ethernet media types at 10 or  
100Mps speed. Each 4PM provides one port for connecting one Ethernet segment  
with its individual connector type and media.  
For a list and brief illustration of 4-Port Module types, refer to Section 2.4  
Each 4PM is individually described in the following sections.  
5.2.1  
LE1428C, 100Mb multi-mode FX-ST-4-port Module, “twist lock” connector  
The LE1428C is a multi-mode 100Mbps fiber optic 4-port  
module equipped with a dual ST-type  
connector. It functions as a fiber optics  
transceiver to support 100BASE-FX  
network segments. When installed in a  
LE14XXA-Series Fiber Switches, it  
supports fiber optic cable distances up the  
IEEE-specified 100Mbps shared-collision-  
domain distance limits, i.e., typically 2km at  
full-duplex and 412m at half-duplex.  
100BASE-FX, and 10BASE-FL  
ST Connectors  
1
2
3
FDX/HDX  
1
2
3
4
ACT  
LK  
1
2
3
4
1
ACTIVITY  
2
LINK  
FULL/HALF  
DUPLEX MODE  
3
The module is equipped with an Activity (ACT) LED, a Link (LK) LED which  
indicates proper connectivity with the remote device when lit, and the FDX/HDX LED indicate  
the full or half-duplex mode. Lettering on the front of the module identifies it as “100 FX” to  
avoid confusion with other similar-looking 10 Mb fiber 4PMs.  
5.2.1a  
LE1424C, 10 Mbps multi-mode FL-ST-4-port type, “twist-lock” connector  
The LE1424C is a multi-mode 10 Mbps fiber optic module equipped with a dual ST-  
type connector. It looks similar to the 100Mb LE1428C, but has the lettering “10 Mb” on the  
front to distinguish it. It supports fiber optic cable distances up the IEEE -standard 10 Mb  
distance limits , i.e., typically 2km at full-duplex and at half-duplex.  
Each port has an Activity (ACT) LED indicating packets being received, a  
Link (LK) LED that indicates proper connectivity with the remote device when lit, and a  
FDX/HDX LED to indicate full-duplex mode when lit (or half-duplex when off). Lettering on th  
37  
Download from Www.Somanuals.com. All Manuals Search And Download.  
lack Box Modular Switches  
Installation and User Guide (8/99)  
ont of the module identifies it as “10 FL” to avoid confusion with other similar-looking 100Mb  
ber QPMs.  
2.2  
LE1419C 100Mbps multi-mode FX-SC-4-port type, “snap-in” connector  
100BASE-FX Multi-Mode  
The LE1419C is also a multi-mode 100Mbps  
SC Connectors  
ber optic transceiver module, similar to the LE1428C.  
has the same LEDs indicating port activity (ACT),  
nk (LK), and FDX.HDX operational, and the same  
ce-plate lettering.  
1
2
3
1
2
3
4
FDX/HDX  
ACT  
LK  
1
2
3
4
4
ACTIVITY  
2
LINK  
1
While the functionality of the these two  
odules is the same, the LE1419C is equipped with an  
C-type "snap-in" connector instead of an ST-type.  
FULL/HALF  
3
DUPLEX MODE  
2.3  
LE1421C 100Mbps single-mode FX-SC-type, “snap-in” connector  
The LE1421C is a single-mode 100Mbps fiber optic module equipped with a dual SC-  
pe connector. It functions as a full fiber optic transceiver to the Modular-Switches, supporting  
ur single-mode fiber network segments.  
100BASE-FX Single-Mode  
TheLE1421C, when installed in a  
E14XXA-Series Modular Switch operating at  
00Mbps full-duplex, supports single-mode fiber  
ble lengths of as much as 25+ Km (see Power  
udget, Section 4.5)  
SC Connectors  
3
1
2
FDX/HDX  
1
2
3
4
ACT  
LK  
1
2
3
4
Each port is equipped with an Activity  
ACT) LED, LINK(LK) LED, (10/100) Speed and  
HDX/FDX) Half or full Duplex mode identical to  
ose of the LE1419C. To distinguish the single-  
ACTIVITY  
2
1
LINK  
FULL/HALF  
3
DUPLEX MODE  
ode LE1421C from the multi-mode LE1419C, the label “Sgl. M.” is at the top of the faceplate  
the LE1421C.  
38  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Black Box Modular Switches  
Installation and User Guide (8/99)  
5.2.4  
LE1422C, 100Mb multi-mode FX 4-Port, MTRJ small-form-factor connector  
LE1422C is a multi-mode fiber optic 4-port module equipped with a small-form-facto  
MTRJ-type connector. It looks almost like  
an RJ-45 port, but it is black in color. The  
MT-RJ’s small size and ease of connection  
make it a good choice for 100Mbps “fiber-  
to-the-desktop” Ethernet connectivity.  
When installed in a LE14XXA-Series full-  
duplex Switch, it supports fiber optic cable  
distances up the IEE-standard 100Mbps  
shared-collision-domain distance limits, i.e.,  
typically 2 km at full-duplex and 412m at  
half-duplex.  
100BASE-FX MTRJ  
Connectors  
1
3
2
FDX/HDX  
1
2
3
4
ACT  
1
LK  
2
3
4
2
ACTIVITY  
1
LINK  
3
FULL/HALF  
DUPLEX MODE  
“small-form-factor”  
The functionality of this 100BASE-FX multi-mode 4PM is same as the ST and SC-  
types, and it is equipped with the same ACTIVITY (ACT), LINK (LK) LEDs to indicate  
proper connectivity with the remote device and (FDX/HDX) indicate the FULL OR HALF  
DUPLEX MODE at the port. It has the same “100Mb FX” lettering on the faceplate. Note tha  
the other end of the fiber cable may have a different connector, not necessarily an MT-RJ type.  
5.2.5  
LE1423C, 100Mbps multi-mode FX 4-Port, VF-45 small-form-factor connector  
39  
Download from Www.Somanuals.com. All Manuals Search And Download.  
lack Box Modular Switches  
Installation and User Guide (8/99)  
LE1423C is a 4-port multi-mode fiber FX “small-form-factor” VF-45 connector used  
imarily in 100Mbps fiber-to-the-desktop links. Its size is similar to the MT-RJ port, but the  
F-45 shell is slightly larger. When not in use, its appearance is distinctive because it has a tiny  
nged door over the port hole to act as a dust cover.  
100BASE-FX MV45  
When installed in a LE14XXA-Series  
Connectors  
odular Switches at full-duplex, it supports fiber  
1
3
2
ptic cable distances up the IEEE-standard 100Mbps  
stance limits, i.e., typically 2 km at full-duplex and  
12m on half-duplex.  
FDX/HDX  
1
ACT  
LK  
2
3
4
The small size, about the same as an RJ-45,  
duces the size of wiring panels in wiring closets  
hile providing the advantage of “future-proof” fiber  
ptic technology.  
ACTIVITY  
2
1
LINK  
3
FULL/HALF  
DUPLEX MODE  
“small-form-factor”  
The cable port is a “plug-in” connector, with  
oth fiber strands terminated in one housing that cannot be improperly inserted. The module is  
quipped with a LINK (LK) LED to indicate proper connectivity with the remote device, an  
CTIVITY (ACT) LED that flashes to show when Fast Ethernet packets are being received and  
(FDX/HDX) LED indicate the full-duplex mode when lit (or half-duplex when off).  
2.6 LE1425C (Twisted Pair), 10/100Mb TP 4-Port  
The LE1425C module supports Ethernet twisted pair segments of any standard length.  
is equipped with 4-port RJ-45 connector with 10/100 and auto-negotiating capability on each  
ort. The RJ-45 connector is shielded to minimize emissions and will allow both unshielded  
wisted pair (UTP) and shielded twisted pair (STP) cable connections.  
The LE1425C 4-port module is equipped with a Media Dependent Interface-  
rossover (MDI-X) push-button to allow for one cascaded connections. This feature eliminates  
e need for a special twisted pair crossover  
10/100BASE-T,4Port  
ble when connecting to a hub or another  
RJ-45 Connectors  
witch.  
1
2
With the push-button in the IN (X)  
osition, the PM-TP port is used for  
scaded and up-link connections (i.e.: a  
1
2
3
4
ACT  
LK  
Cross-Over  
Push Switch  
100/10  
FDX/HDX  
4
3
1
2
LINK  
ACTIVITY  
40  
FULL/HALF  
3
4
SPEED  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Black Box Modular Switches  
Installation and User Guide (8/99)  
connection to another hub or switch typically.) When used for segments going to workstation  
and other user node device connections, the MDI-X push-button should be in the OUT (=)  
position.  
The LE1425C will support 10BASE-T unshielded twisted pair wiring (UT  
environments with maximum segment distances up to 100m (325 ft.), or shielded twisted pair  
wiring (STP) of 150m (500 ft.). Each port has an Activity (ACT) LED indicating packets being  
received, a Link (LK) LED that indicates proper connectivity with the remote device when lit, a  
FDX/HDX LED to indicate full-duplex mode when lit (or half-duplex when off), and a “speed”  
LED indicating 100Mb when lit (or 10 Mbps when off).  
Important Note: For the LE1425C Crossover Push-button -  
OUT for workstations and user connections.  
IN for Up-Link connections to other hubs, etc.  
The RJ-45 pins normally (TP crossover push-button DOWN) are per the standard for  
hubs-to-users twisted pair wiring: 1 = receive+, 2 = receive-, 3 = transmit+, 6 = transmit-,  
other pins not used. When the TP crossover push-button is UP, the pins of the RJ-45 po  
are per the standard for up-links using twisted pair wiring, i.e., the transmit and the receive  
pairs are exchanged: 1 = transmit+, 2 = transmit-, 3 = receive+, 6 = receive-, other pins not  
used.  
5.2.7 LE1426C, “3TP + 1F” 3 10/100Mb RJ-45 and 1 100Mb Fiber SC (multi-mode)  
10/100BASE-T and 100BASE-FX Combo  
Connector Combo 4-Port  
Quad-Port Connectors  
2
The LE1426C Combo 4-port  
1
1
2
3
4
ACT  
LK  
supports three auto-negotiating twisted pair  
ports at 10/100Mbps FDX/HDX, and one  
fiber port with 100Mbps multi-mode FX SC  
connector. The three RJ-45 ports on the right  
operate the same as those in the same place  
on the QPM-RJ45 module.  
5
HDX/FDX  
100/10  
FDX/HDX  
4
3
1
ACTIVITY  
FULL/HALF  
2
LINK  
4
3
SPEED  
DUPLEX (RJ-45)  
FULL/HALF DUPLEX(FIBER)  
5
The fiber SC connector functions as a fiber optics transceiver to support 100BASE-  
FX network segments. When installed in a LE14XXA-Series Fiber Switches, it supports fiber  
optic cable distances up the IEEE-standard 100Mbps distance limits, i.e., typically 2km at full-  
duplex and 412m at half-duplex. The factory default setting is for full-duplex operation, and a  
jumper on the module must be moved to select half-duplex. (See Section 3.4).  
41  
Download from Www.Somanuals.com. All Manuals Search And Download.  
lack Box Modular Switches  
Installation and User Guide (8/99)  
Each 3+1 combo 4-port has an Activity (ACT) LED indicating packets being received,  
Link (LK) LED that indicates proper connectivity with the remote device when lit, a  
DX/HDX LED to indicate full-duplex mode when lit (or half-duplex when off). In addition, the  
J-45 ports have a “speed” LED indicating 100Mb when lit (or 10 Mbps when off). The fiber  
ort is always 100Mbps speed.  
2.8  
LE1427C, “3TP + 1F” 3 10/100Mb RJ-45 and 1 100Mb Fiber ST (multi-mode)  
Connector Combo 4-Port  
he LE1427C is also a Combo 4-port, supports three auto-negotiating twisted pair ports at  
0/100Mbps and one fiber port with 100Mbps multi-mode similar to the FX SC connector. It  
as the same LEDs indicating port activity (ACT), Link (LK), (10/100) Speed, FDX/HDX  
perational and the FDX LED for multi-mode 100Mbps fiber optic transceiver module, similar  
the LE1426C.  
2.9  
LE1429C, “3 + 1” 3 10/100Mb RJ-45 and 1 100Mb Fiber SC Single-mode  
Connector, “Combo” 4-Port Module  
The LE1428C is also a 3+1 Combo 4-port module. It is the same as the LE1426C  
3+1 combo” module except the fiber port is single-mode. See Section 5.2.3 for a description of  
e 100Mb single-mode fiber port.  
2.10  
4PM-FP  
The 4PM-FP is a blank face plate that must be installed in empty 4PM slot. When the  
E14XXA chassis contains less than required  
ont mounted 4PMs, the empty front slots must  
e covered with the 4PM-FP face plate in order  
maintain proper cooling air flow, and for  
fety, etc.  
Fig.5.2.10 Blank Face Plate  
42  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Black Box Modular Switches  
Installation and User Guide (8/99)  
6.0  
TROUBLESHOOTING  
If problems should develop during installation or operation, follow the suggestions  
below prior to calling Technical Support for help. If you are unsure of any procedure  
described in this chapter, or if the LE14XXA is not operating as expected, do not  
attempt to repair or alter the unit. Contact Black Box for assistance.  
6.1  
Before Calling for Assistance  
1. If you have difficulty installing or operating the LE14XXA Modular Switches, refer to  
Chapters 3 and 4. Make sure that the various other components of the network are  
working.  
2. Check the cables and connectors to make sure that they have been properly connected  
and the cables/wires have not been crimped or in some way impaired during installation  
3. Check that the AC power cord is plugged into a functioning electrical outlet. Make sur  
that the AC power cord is properly plugged into the Modular Switches. Use the PWR  
LED to verify that the unit is receiving proper power.  
43  
Download from Www.Somanuals.com. All Manuals Search And Download.  
lack Box Modular Switches  
Installation and User Guide (8/99)  
4. If the problem is isolated to a network device other than the LE14XXA -Series Modular  
Switch, replace the problem device with a known good device. Verify whether or not  
the problem is corrected. If it is not, go to step 5. If the problem is corrected, the  
Modular Switches and its associated cables will function properly.  
5. If the problem still exists, contact Black Box.  
2
When Calling for Assistance  
If you determine that your LE14XXA-Series Modular Switch is malfunctioning, do  
not attempt to alter or repair the unit. It contains no user-serviceable parts. Contact Black  
Box at (724) 746-5500.  
Before you do, make a record of the history of the problem. Black Box will be able  
to provide more efficient and accurate assistance if you have a complete description,  
including:  
·
·
·
·
the nature and duration of the problem.  
when the problem occurs.  
the components involved in the problem.  
any particular application that, when used, appears to create the problem or  
make it worse.  
3
Shipping and Packaging Information  
If you need to transport or ship your LE14XXA -Series Modular Switch:  
·
·
Package it carefully. We recommend that you use the original container.  
If you are shipping the LE14XXA -Series Modular Switch for repair, make sure you  
include everything that was in the original package. Before you ship, contact Black  
Box to get a Return Materials Authorization (RMA) number.  
Ship the package to:  
Black Box Corporation  
1000 Park Drive  
Lawrence, PA 15055  
Phone: (724) 746-5500  
Fax:  
(724) 746-0746  
44  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Black Box Modular Switches  
Installation and User Guide (8/99)  
Black Box Corporation  
The World’s Source for Connectivity  
Ó Copyright 1999. Black Box Corporation. All rights reserved.  
1000 Park Drive · Lawrence, PA 15055 · (724) 746-5500 · Fax (724) 746-0746  
45  
Download from Www.Somanuals.com. All Manuals Search And Download.  

Black Decker Cordless Sander 5106621 06 User Manual
BMW Telephone CPT 9000 User Manual
Bogen Stereo Amplifier GS 100 User Manual
Bose Portable Speaker COMPANION 2 User Manual
Boss Audio Systems Headphones HP 10 User Manual
Boss Audio Systems MP3 Player MR1305WUA User Manual
Boston Acoustics Car Speaker soundware xs 51 51 surround speaker system User Manual
Breville Toaster CT75XL A User Manual
Brinkmann Smoker Electric Smoker User Manual
Canon CRT Television LV 7565F User Manual