GarrettCom Switch Magnum ST80 User Manual

Magnum ST80 Stackable  
Personal Hub  
Installation and User Guide  
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Stackable Personal Hubs  
Installation and User Guide (04/01)  
Contacting GarrettCom, Inc  
Please use the mailing address, phone and fax numbers and email address listed below:  
GarrettCom, Inc.  
47823 Westinghouse Dr.  
Fremont, CA 94539  
Phone (510) 438-9071  
Fax (510) 438-9072  
Federal Communications Commission  
Radio Frequency Interference Statement  
This equipment generates, uses and can radiate 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 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 required to correct the interference.  
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Installation and User Guide (04/01)  
TABLE OF CONTENTS  
Page  
1.0 SPECIFICATIONS...................................................................................... 1  
1.1. Technical Specifications.................................................................................. 1  
1.2 ORDERING INFORMATION......................................................................... 3  
2.0 INTRODUCTION ....................................................................................... 4  
2.1 Inspecting the Package and Product.................................................................. 4  
2.2 Product Description ......................................................................................... 5  
2.3 Features and Benefits........................................................................................ 8  
2.4 Applications...................................................................................................... 9  
3.0 INSTALLATION ............................................................................................ 11  
3.1 Table-Top or Shelf Mounting ........................................................................ 11  
3.2 Wall (or Vertical Surface) Mounting (for non-stacked units only)................. 12  
3.3 Combining and Mounting Stacked Units........................................................ 12  
3.4 Twisted Pair Segment Connections ................................................................ 13  
3.5 AUI Connection.............................................................................................. 13  
3.6 BNC Connection (Model ST80-B only) ......................................................... 15  
3.7 Fiber Optic Connection (Model ST80-F only)................................................ 15  
3.8 Switchable Up-Link Option............................................................................ 16  
3.9 Stacking the ST80 Personal Hubs................................................................... 16  
3.10 Cascading ST80 Personal Hubs with the Up-Link port ................................ 18  
4.0 OPERATION............................................................................................. 19  
4.1 Functional Operation, Use of LED Indicators ................................................ 19  
4.2 Using the Up-Link switch............................................................................... 20  
4.3 Using the BNC internal termination switch (Model ST80-B only) ................ 20  
4.4 Using the Stack Enable switch........................................................................ 21  
5.0 TROUBLESHOOTING............................................................................. 22  
5.1 Before Calling for Assistance ......................................................................... 22  
5.2 When Calling for Assistance .......................................................................... 23  
5.3 Return Material Authorization (RMA) Procedure .......................................... 23  
5.4 Return Shipping and Packaging Information.................................................. 24  
APPENDIX A: WARRANTY INFORMATION .................................................... 24  
Revisions  
Rev B 04/01 : Change the company name to GarrettCom, Inc. (Formerly it  
was Garrett Communications). There are no changes to the content of the  
material at this time  
Rev A 06/95 : This revision is the initial release of the Magnum ST80 Stackable  
Personal Hub user manual.  
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Stackable Personal Hubs  
Installation and User Guide (04/01)  
The Magnum Line  
ETHERNET C ONNEC TIVITY PRODUC TS  
"DESIG NED AND MANUFAC TURED IN THE USA"  
OVERVIEW  
GarrettCom, Inc.offers the premium-quality Magnumline of Ethernet LAN  
connectivity products with industry-standard functionality and built-in fiber  
configurability. Magnum products are designed for use in demanding Carrier Class,  
Industrial Grade and OEM applications where reliability is a primary consideration.  
4K-Series Switches, 100 & 10Mbps, copper ports with optional fiber  
port, with auto-negotiating full switching performance  
Quad-Series Fiber Switches, 100 & 10Mbps, fiber and copper  
ports, mixed-speed and mixed-media types, full switching  
performance  
“Outdoor” Ethernet Switch, for temperature uncontrolled locations  
6 10/100 and 2 100Mb fiber ports, can be connected in strings  
Mixed-Media Fiber Hub, 16-port Stackable, 10/100 auto-sensing  
Dual Speed 8-port and 16-port Stackables, 10/100 auto-sensing  
Stackable Hubs, SNMP Optional  
10Mb series and 100Mb series, both w/ optional port modules  
Personal Switches, 10/100Mb  
8 port dual speed, Auto-negotiable with fiber option  
Personal Hubs, 100Mb or 10/100Mb  
8-port, with two switched ports (1 fiber built in)  
Personal Hubs, 10Mb series  
8-port + AUI, stackable to 5 high, + optional BNC of fiber port  
8 or 9-port and 4 or 5-Port Personal Hubs, w/ man. up-link sw.  
Media Converters, 10Mb and 100Mb series  
All media combinations, incl. fiber ST, SC, mm., single mode  
The “X-line” of configurable MiXed Media products:  
Stackable Concentrators, SNMP optional, 13-Ports  
Mini-Concentrators, 7 Ports, Repeaters, 2-Ports  
Repeater Port Modules (RPMs), 6 types for Ethernet media  
Bridge Port Modules (BPMs), 4 types, for segment isolation  
Fan-Outs, 10Mb series  
2, 4 and 8 Port Models  
Transceivers, 10Mb and 100Mb series 10Mb Mini-Transceivers  
and Coax Models, All Types -  
Apr, 01  
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Stackable Personal Hubs  
Installation and User Guide (04/01)  
1.0  
SPECIFICATIONS  
1.1.  
Technical Specifications  
Performance:  
Data Rate: 10 Mbps  
Partitioning: Enforced after 32 consecutive collisions.  
Reconnect: Occurs after 512 bits error-free transmission.  
Maximum Ethernet Segment Lengths:  
10BASE-T (Unshielded twisted pair) - 100 m (328 ft)  
10BASE-T (Shielded twisted pair)- 150m (492 ft)  
AUI Drop Cable  
10BASE2 ThinNet (BNC)  
10BASE5  
- 50 m (164 ft)  
- 185 m (607 ft)  
- 500 m (1,640 ft)  
10BASE-FL multi-mode Fiber optic - 2 km (6562 ft)  
Network Standards:  
Ethernet V1.0/2.0 IEEE 802.3: 10BASE-T, 10BASE5, 10BASE2,  
10BASE-FL, FOIRL.  
(Magnum Stackable Personal Hubs are physical layer standard Ethernet  
products, and operate in networks independently of all software.)  
Operating Environment:  
Ambient Temperature: 32ºF to 122ºF (0ºC to 50ºC)  
Storage Temperature: -20ºC to 60ºC  
Ambient Relative Humidity: 10% to 95% (non-condensing)  
Power Supply (External):  
Input: 95 - 125 vac at 60 Hz for "-d" Models,  
200 - 250 vac at 50 Hz for "-i" Models, which have  
IEC power cable connector in the external power unit.  
Output: 12 VDC, 1 A  
Polarity: center positive, shell negative  
Power Consumption: 12 watts max.  
Connectors:  
ST80: Eight shielded RJ-45 ports (one with up-link switch); one rear AUI,  
female, with slide lock; two Inter-Repeater-Bus connectors on the side.  
ST80-B: Same as ST80, plus one rear BNC with internal termination switch.  
ST80-F: Same as ST80, plus one rear Fiber ST-type.  
(Shielded 10BASE-T connectors accept either unshielded or shielded wiring  
plugs for standard twisted pair media wiring.)  
The regular RJ-45 ports support the standard for hubs-to-users twisted  
pair wiring: pin 1= receive+, 2 = receive-, 3 = transmit+, 6 = transmit-,  
other pins not used. The RJ-45 port with the up-link switch is normally  
the same, but when switched it supports the standard for up-links using  
twisted pair wiring, i.e., the transmit and the receive pairs are exchanged:  
pin 1 = transmit+, 2 = transmit-, 3 = receive+, 6 = receive- , other pins  
not used.  
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Switches:  
Up-Link: MDI-X (Media Dependent Interface - Crossover) manual slide  
switch, converts RJ-45 port #8 from a regular (=) user segment port to a  
crossover (X) up-link port for on-off connection to a backbone or another  
cascaded hub.  
Stack Enable Switch: Manual slide switch to specify which Stackable  
Personal Hub is the base of the stack. Exactly one hub should have its Stack  
Enable switch in the “OFF” position (left). All other hubs in the stack should  
have their Stack Enable switches set to the “ON” position (right).  
Internal Termination Switch (ST80-B only): When switched to the right  
position, allows BNC connection without a “tee” connector and a 50 ohm  
terminator. When switched to left position, a “tee” connector is required.  
LEDs:  
PWR: GREEN when Proper DC power supplied to ST80.  
COL: YELLOW when a transmit collision occurs on the hub.  
LINK/TX (per port): GREEN when link established on port. Flickers as  
port transmits packets.  
POL/RX (per port): Flickers GREEN as port receives packets. Steady  
GREEN when reversed polarity detected.  
Packaging:  
Enclosure: Rugged, high strength steel enclosure.  
Suitable for vertical or horizontal mounting.  
Any unit may be used stand-alone, or as either the base unit or an additional  
unit in a stack (two stacking / mounting clips and one IRB cable are  
included with each unit)  
Recessed LEDs to avoid damage, located with the RJ-45 ports for convenience.  
Dimensions:  
All models: 6.75 in x 4.0 in x 1.0 in (17.1 cm x 10.1 cm x 2.5 cm)  
Weight:  
All models:  
Power Supply: 1.0 lb. (455 gr.)  
Cooling method:  
Convection  
Agency Approvals:  
1.3 lb. (600 gr.)  
Magnum ST80 is UL Listed (UL1950), CSA certified  
115v 60 Hz Power Supply is UL Listed, CSA certified.  
230v 50 Hz Power Supply is same, also GS approved.  
Emissions: Meets FCC Part 15, Class A  
Warranty:  
Three years (see also Appendix A)  
Made in USA  
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1.2  
Ordering Information  
Magnum Stackable Personal Hubs  
MODEL  
DESCRIPTION  
Magnum ST80-d Stackable Personal Hub with eight standard RJ-45 ports, one  
with up-link switch, plus one rear AUI port; external 115 vac  
60 Hz power supply.  
Magnum ST80-i  
Same as ST80-d, but with external 230 vac 50 Hz power  
supply.  
Magnum ST80-B-d Stackable Personal Hub with eight standard RJ-45 ports, one  
with up-link switch; one AUI plus 1 BNC port with internal  
termination switch; external 115 vac 60 Hz power supply.  
Magnum ST80-B-i Same as ST80-B-d except with external 230 vac 50 Hz  
power supply.  
Magnum ST80-F-d Stackable Personal Hub with eight standard RJ-45 ports, one  
with up-link switch; one AUI plus one Fiber-ST port with  
LINK LED; external 115 vac 60 Hz power supply.  
Magnum ST80-F-i Same as ST80-F-d except with external 230 vac 50 Hz  
power supply.  
GarrettCom, Inc. reserves the right to change specifications, performance  
characteristics and/or model offerings without notice.  
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2.0  
INTRODUCTION  
This section describes the ST80 Stackable Personal Hub, including appearance,  
features and possible applications.  
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
2
4
1
1
Magnum ST80-series Stackable Personal Hub  
External Power Supply, either 115v 60 Hz or 230v 50 Hz  
Velcro® Tape section, approximately 3 inches in length  
L-shaped stacking /mounting brackets  
Metal screws for optional use with stacking/mounting brackets  
Installation and User Guide  
Product Registration Card  
Remove the Magnum Stackable Personal Hub from the shipping container. Be  
sure to keep the shipping container should you need to ship the unit at a later date. To  
validate the product warranty please complete and return the enclosed Product  
Registration Card to GarrettCom, Inc. as soon as possible.  
In the event there are items missing or damaged, contact your supplier. If you  
need to return the unit, try to use the original shipping container. Refer to Section 5,  
Troubleshooting, for specific return procedures.  
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2.2  
Product Description  
The Stackable Personal Hub is an eight-port + workplace hub in a very  
compact package. It is simple to install and use in an office or lab environment,  
requiring no special rack cabinets or wiring closet apparatus. Up to five Stackable  
Personal Hubs may be stacked to form a single logical repeater. Personal Hubs are  
standard physical layer Ethernet products and operate independently of all software.  
ST80 Personal Hubs are well suited for small- to-medium-size office or lab  
environments (up to eight users without stacking) that need an independent Ethernet  
network. They can operate as self-sufficient units to provide 10BASE-T Ethernet  
connectivity for local users and devices. Small independent networks built using  
Stackable Personal Hubs are easily expanded by stacking additional ST80s via the IRB  
connectors. The AUI port provides backbone or other connectivity if required. (The  
ST80-B and ST80-F models are also equipped with a BNC or a Fiber-ST connector for  
convenient media connections.)  
PWR  
AUI  
Magnum ST80 Stackable Personal Hub  
UP-LINK  
Ports  
1
2
3
4
5
6
7
8
Network  
Port  
Stackable Personal Hubs provide a simple and inexpensive solution for  
networking a multi-system office using 10BASE-T twisted pair cabling. They can  
expand an existing single-network-port outlet to provide up to seven additional RJ-45  
ports in the immediate office or lab area. Once installed, a Stackable Personal Hub is  
easily expanded by stacking additional units to support larger numbers of users.  
The Magnum ST80s’ small size makes them very useful for demonstration  
situations in conference rooms and in exhibitions where a temporary network or network  
expansion is needed. They are handy as a piece of test equipment that can be easily  
inserted into a network to provide a test port, and then removed after the testing is done.  
Stackable Personal Hubs take up minimal space, use minimal power, and are rugged  
enough to be carried in a coat pocket for possible emergencies.  
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ST80 Personal Hubs fit easily into the workplace environment. They are  
versatile enough to be table-top or shelf-mounted. Alternatively, the brackets included in  
the package may be used to mount a single (un-stacked) unit on a wall or any suitable  
vertical surface. All of the wiring connectors are in the same plane so that wiring space is  
neat and minimal. The external power supply unit conveniently plugs into an AC wall  
receptacle or power strip.  
BNC Internal  
Termination Swtich  
10BASE2 (BNC) Port (ST80-B only)  
(ST80-B only)  
Power Jack  
Fiber (ST) PORT (ST80-F only)  
AUI Port  
IRB  
Connectors  
PWR  
AUI  
Up-Link Switch  
Magnum ST80 Stackable Personal Hub  
UP-LINK  
Ports  
1
2
3
4
5
6
7
8
Stack Enable  
Switch  
Switchable  
Up-Link Port  
Status LEDs  
Front Ports  
The ST80's RJ-45 ports support connection of up to eight workstations or other  
network devices over full length 10BASE-T cable segments. Stackable Personal Hubs  
operate in compliance with the IEEE 802.3 specification for repeater functionality to  
perform signal amplification, re-timing of data packets, and regeneration of preamble bits  
for each packet received. Consistent with IEEE 802.3 specifications, Stackable Personal  
Hubs will detect collisions, extend collision fragments, and automatically partition and  
re-connect individual ports in order to keep problems on one segment from causing  
downtime elsewhere on the network.  
Model ST80 Personal Hubs include per port LINK/TX and POL/RX LEDs, a  
COLlision LED and a DC PWR LED, all conveniently located on the front of the unit.  
The LINK/TX LED illuminates GREEN when functional link is detected on the port. It  
is intermittently turned off as the port transmits a packet. The POL/RX LED  
intermittently illuminates GREEN as the port receives packets. If improper polarity is  
detected, the LED is steady GREEN (the ST80 automatically compensates for the  
polarity reversal and resumes normal operation). If the port becomes partitioned, the  
LINK/RX and POL/TX LEDs will blink alternately. The COL LED flashes YELLOW  
whenever a transmit collision occurs on any of the ports.  
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The external power supply unit supplied is one of two types; one version for  
AC input power of 115 vac 60 Hz, and one version for 230 vac 50 Hz. The 115 vac  
version has a small transformer integral with a convenience power outlet plug. The 230  
vac version has a small transformer integral with an IEC-type power plug for a user-  
supplied AC power cord with a convenience power outlet plug. Both types also include  
a lightweight DC power cord to the applicable power jack on the ST80 unit.  
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2.3  
Features and Benefits  
Expandable Design  
ν
When network needs grow, several Stackable Personal Hubs can be easily  
stacked to form a single logical repeater of up to forty RJ-45 ports.  
ν
Low cost, stand-alone 10BASE-T connectivity  
Operating in a stand-alone environment as self-sufficient devices,  
Stackable Personal Hubs offer a very low cost method of providing small  
workgroups access to a variety of Ethernet networking services such as file  
sharing, E-Mail, printer sharing, and other computer information.  
ν
ν
Interconnect to an Existing Ethernet Network  
Stackable Personal Hubs provide a manual Up-Link switch that allows one  
RJ-45 port to connect into an existing Ethernet environment (such as the  
central hub for the building or area) via 10BASE-T wiring.  
Inter-operable with other Ethernet Devices  
Stackable Personal Hubs are completely inter-operable with other Ethernet-  
compliant network devices. Each is fully compliant with IEEE 802.3  
specifications for 10 Mbps CSMA/CD operation, and can be integrated within  
any standard Ethernet network and operate with standard software.  
ν
ν
Installation Versatility  
Stackable Personal Hubs are easy to install in most any office or lab location.  
The tiny package is very unobtrusive and may even be Velcro mounted.  
LEDs Simplify Network Installation and Maintenance  
Stackable Personal Hubs are equipped with a full complement of LEDs to  
provide status about basic network activity. LINK LEDs for each port offer a  
simple way to verify operational connections of each 10BASE-T segment.  
ν
High Quality  
Stackable Personal Hubs have a rugged steel case and are compliant with rigid  
CE emission standards, making them suitable for commercial and home  
offices. Per-port partitioning and re-connection avoids most downtime.  
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2.4  
Applications  
Expanding from one to multiple ports at an existing site is easy, and requires  
no modification to typical building wiring. Simply plug the existing networked device's  
network cable into one of the ST80’s front RJ-45 ports. The Up-Link port (with switch  
set to “X”) connects via 10BASE-T cabling to the existing network outlet. Optionally, a  
mini-transceiver may be connected to the rear-mounted AUI port to provide connectivity  
to any standard Ethernet media type. (The ST80-B and ST80-F provide for direct  
connection to 10BASE2 and multi-mode Fiber respectively).  
Port 8 Switchable  
...to existing network via  
Up-Link set to “X”  
PWR  
AUI  
switchable Up-Link port.  
Magnum ST80 Stackable Personal Hub  
UP-LINK  
Ports  
1
2
3
4
5
6
7
Personal Workgroup  
Power is connected by plugging the external power supply unit into an AC  
power receptacle, and plugging the DC power plug into the jack on the back of the ST80.  
In minutes, up to eight additional ports are available for other networked devices.  
...to existing network via AUI,  
BNC (ST80-B only), or Fiber ST  
(ST80-F only) connector.  
PWR  
AUI  
Magnum ST80 Stackable Personal Hub  
U
P-LINK  
Ports  
1
2
3
4
5
6
7
8
Port 8 Switchable  
Up-Link set to “==”  
Personal Workgroup  
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Stackable Personal  
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Rear port(s) may be used  
for additional user(s).  
Hubs may also be used as a  
stand-alone network for a  
personal multi-user system  
such as shown below. Up to  
eight RJ-45 user ports are  
PWR  
AUI  
Magnum ST80 Stackable Personal Hub  
U
P-LINK  
Ports  
1
2
3
4
5
6
7
8
Port 8 Switchable  
Up-Link set to “==”  
Personal Workgroup  
available where only 10BASE-T wiring is used, and full-length Ethernet segments are  
supported on all ports. In this application, the Up-Link switch is in the straight-through or  
“==” position so that port 8 is a user port, not an up-link to another hub.  
When network requirements exceed the capacity of a single ST80, additional  
hubs may be stacked to form a single logical hub. This stacking capability allows one to  
build larger networks that are in compliance with the “four repeater rule” specified in the  
Ethernet standards. As with a single ST80 unit, a stack may be connected to a backbone  
through any standard Ethernet media. A stack of ST80s may also be cascaded as a unit  
into another stack or hub.  
Fiber backbone  
connection  
PWR  
AUI  
Magnum ST80 Stackable Personal Hub  
UP-LINK  
Ports  
1
2
3
4
5
6
7
8
PWR  
AUI  
6
Magnum ST80 Stackable Personal Hub  
UP-LINK  
Ports  
1
2
3
4
5
7
8
Up-Link  
set to “X”  
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3.0  
Installation  
Installation of a Stackable Personal Hub is a simple procedure. First, locate an  
AC receptacle that is within six feet (2 meters) of the intended hub location and plug in  
the external power supply unit (provided as part of the unit). The small DC power cord  
from the power supply plugs into the matching rear power jack of the ST80, and when  
power is applied  
8
7
6
5
4
3
2
1
s t r o P  
External  
Power Supply  
K N I L - U P  
b
H l a u n e r s o b l e k c P a S t 8 a 0 T S  
g n a u M m  
the green PWR  
LED will  
I
U
A
R
W P  
illuminate.  
Power Jack  
The external power supply unit supplied is one of two types; one version for  
AC input power of 115 vac 60 Hz, and one version for 230 vac 50 Hz. Examine the  
power supply to make sure the version you have is the right type for your AC power  
system. The 115 vac version has a small transformer integral with a convenience power  
outlet plug, and a lightweight DC power cord to the applicable power jack on the hub.  
The 230 vac version has a small transformer integral with an IEC-type power plug for a  
user-supplied AC power cord with a convenience power outlet plug. It also includes a  
lightweight DC power cord to the applicable power jack on the ST80 unit.  
Power Jack  
AUI Port  
Rear View - ST80  
Termination Switch  
10BASE2 Port AUI Port  
Power Jack  
AUI Port  
Power Jack  
Fiber ST Port  
Rear View - ST80-B  
Rear View - ST80-F  
3.1  
Table-Top or Shelf Mounting  
Stackable Personal Hubs are easily mounted on a table-top or shelf, and have  
four rubber feet to provide stability without scratching finished surfaces. When properly  
installed, the front-mounted status LEDs will be in plain view and easy to read. Plug in  
two or more Ethernet cable segments, and the network is in operation.  
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The rugged steel case of the ST80 Personal Hub will protect it from accidental  
damage in an office or lab workplace setting. Keep an open area around the unit so that  
convection cooling can occur while the unit is in operation.  
3.2  
Wall (or Vertical Surface) Mounting (for non-stacked units only)  
When the Stackable Personal  
Hub is being used as a single unit, the  
stacking/mounting brackets may be used to  
mount the unit on a wall or any  
convenient surface where the associated  
cables are out of the way. The brackets  
Proper attachment of stacking/  
mounting bracket for wall mounting  
are attached to each side of the ST80’s case using one of the metal screws for each  
PWR  
-
AUI  
+
bracket. The brackets should be  
attached to the ST80 through the round  
hole of the bracket. When properly  
attached, the brackets will extend  
slightly below the base of the unit to  
allow clearance for the rubber feet.  
Magnum ST80 Stackable  
Personal Hub  
UP LINK  
Ports  
1
2
3
4
5
6
7
8
Top view - One non-stacked ST80 with  
brackets attached for wall mounting  
3.3  
Combining and Mounting Stacked Units  
When stacking two or more ST80s, the stacking/mounting brackets should be  
used to attach each additional unit to the one below it. First, attach two brackets to the  
bottom of the upper unit, using two of the metal screws. To ease installation, attach the  
brackets to the bottom of each unit  
through the round holes of the  
brackets. The brackets should be  
oriented so that they extend down  
Upside-down view - ST80 with  
brackets attached for stacking  
and out when the unit is upright.  
Next, set the upper unit on top of the lower unit, so that the slotted holes of the  
two brackets line up with the screw holes in the side of the lower ST80. Attach the  
brackets to the lower unit with the two remaining screws. If additional units are to be  
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included in the stack, attach them in the same manner. (The brackets and screws  
included with the bottom unit of the stack will  
not be used for stacking purposes.)  
3.4  
Twisted Pair Segment Connections  
1. Using standard 10BASE-T media,  
insert the male plug on one end of the network  
cable into one of the RJ-45 female ports on the  
Stackable Personal Hub. Even though the hub's  
Proper attachment of ST80s with  
stacking/mounting bracket  
ports are of the shielded type, they will accept and operate properly with both shielded  
and unshielded type RJ-45 twisted pair wiring.  
2. Connect the other end of  
PWR  
AUI  
Magnum ST80 Stackable Personal Hub  
each wiring cable to the applicable  
UP-LINK  
Ports  
1
2
3
4
5
6
7
8
workstation or user device. The port’s  
LINK LED illuminates when the  
connection is made on both ends of the  
wire, and when the DC power is on at  
each end, i.e., when the segment  
RJ-45 User Connections  
circuit is established and is ready to use.  
3. For the port 8 up-link feature, see 3.8.  
3.5  
AUI Connection  
Using the steps below as a guide, attach a new or existing 10BASE5 ThickNet drop-  
cable directly to the AUI connector on the rear of the ST80 Personal Hub.  
1. Plug the male end of the cable into the female AUI connector on the ST80.  
2. Engage the AUI connector slide lock to insure maximum connectivity.  
3. Connect the opposite end of the cable into a network AUI port. (This could be a  
network backbone transceiver, a hub or fan-out with an AUI port, or an AUI Port Module in  
a concentrator.)  
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The AUI port may also used for connecting to other Ethernet devices using  
standard AUI cabling. In this type of situation, it is important to consider the AUI segment  
length to the attached device, including any cascading.  
The maximum transmission distance between a backbone transceiver and the AUI  
port of the ST80 will vary. According to Ethernet standards, when an AUI cable is used to  
connect the ST80 directly to a backbone transceiver, the maximum AUI segment length of  
50m (165 ft.) is allowed. If the ST80 is connected to a transceiver that has been cascaded  
from another transceiver, the maximum AUI segment length is reduced. See the following  
note.  
Important Note: The maximum transmission distance is decreased by 6m (20  
ft.) for every additional level of network transceiver device "dropped" or  
"cascaded" from the original backbone transceiver tap.  
The AUI connector of the Stackable Personal Hub supports standard IEEE signals,  
which are summarized in Table 3.5  
Table 3.5 AUI Pin Assignments  
Pin  
Function  
Pin  
Function  
1
2
3
4
5
6
7
8
9
Control In Circuit Shield  
Control In Circuit A  
Data Out Circuit A  
Data In Circuit Shield  
Data In Circuit A  
Voltage Common  
Control Out Circuit A  
Control Out Circuit Shield (conductive shell)  
Control In Circuit B  
10  
11  
12  
13  
14  
15  
Data Out Circuit B  
Data Out Circuit Shield  
Data In Circuit B  
Voltage Plus (+)  
Voltage Shield  
Control Out Circuit B  
SHELL Protective Ground  
NOTES:  
1)  
2)  
Voltage Plus (pin #13) and Voltage Common (pin # 6) use a single  
twisted pair in the AUI cable.  
Pins 4, 8, 11 and 14 may be connected to pin #1.  
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3.6  
BNC Connection (Model ST80-B only)  
Connect the ThinNet coax cable to the BNC connector on the rear of the ST80-B in  
the same manner as is done for any standard BNC connection. The BNC port is specially  
equipped with an internal termination switch that eliminates the need to use a "tee" connector  
when the BNC cable is ending at the ST-80. When the switch is in the right position, the  
connection is internally terminated. When switched to the left position, external termination  
(“tee” connector, not supplied) is required. Some applications may require a "tee" connector,  
used as a tap, to allow the 10BASE2 coax segment to continue on past the ST-80 port  
connection.  
3.7  
Fiber Optic Connection (Model ST80-F only)  
The following procedure applies to FOIRL and 10BASE-FL multi-mode applications  
using an ST80-F. (The primary difference between FOIRL and 10BASE-FL for users is the  
maximum distance allowed. 10BASE-FL is used for a fiber segment length of up to 2000m,  
while FOIRL is used for fiber segments of up to 1000m in length.)  
1.  
tips of the connectors on the ST80’s rear Fiber port. 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  
Before connecting the fiber optic cable, remove the protective dust caps from the  
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, i.e., TX on one end and RX on the other end.  
3.  
Connect the Transmit (TX) port (light colored post) of the ST80 to the Receive  
(RX) port of the remote device. Use the color-coded strand of the cable for this first TX-to-  
RX connection.  
4.  
(TX) port of the remote device. Use the non-color coded fiber strand for this connection.  
5. The LINK LED next to the rear fiber port will illuminate when a proper connection  
Connect the Receive (RX) port (dark colored post) of the ST80 to the Transmit  
has been established at both ends (and when power is ON in the unit). If LINK is not lit after  
cable connection, the normal cause is improper cable polarity. Swap the fiber cables at the  
ST80’s rear fiber port connectors to remedy this situation in most cases.  
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3.8  
Switchable Up-Link Feature  
Each Stackable Personal Hub is equipped with an up-link switch, connected to  
port 8 (right-most RJ-45 port). This switch is used to select either a normal 10BASE-T  
connection to a user device (switch in the “==” position) or a 10BASE-T network up-link  
connection to another hub or concentrator (switch in the “X” position). A special  
crossover cable for up-link is not needed with the Stackable Personal Hub because of this  
built-in up-link switch feature.  
When port 8  
PWR  
AUI  
Magnum ST80 Stackable Personal Hub  
is wired for up-link but  
the switch is set to the  
“==” position, the up-  
link connection is  
UP-LINK  
Ports  
1
2
3
4
5
6
7
8
inoperative and full  
bandwidth is available locally.  
3.9  
Stacking the ST80 Personal Hubs  
When increased network capacity is needed, up to five ST80 Personal Hubs  
may be easily stacked to form a single logical repeater of up to 40 RJ-45 ports.  
PWR  
AUI  
Magnum ST80 Stackable Personal Hub  
UP-LINK  
Stack Enable Switches  
in “ON” position  
(right)  
Ports  
1
2
3
4
5
6
7
8
Stack Enable Switch in  
“OFF” position (left)  
NOTE: Be sure to secure the units with the stacking/mounting brackets  
before making the following electrical connections. The brackets cannot be  
installed while the connector cables are in place. Refer to Section 3.3 for  
stacking bracket installation instructions.  
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When stacking, switch the  
PWR  
AUI  
Stack Enable switch of the bottom  
ST80 to the “OFF” position (left). All  
other units should be switched to the  
“ON” position (right). Using the IRB  
ribbon cable, connect one end to  
Magnum ST80 Stackable Personal Hub  
UP-LINK  
Ports  
1
2
3
4
5
6
7
8
Two stacked ST80s - 16 RJ-45 ports  
either Inter-Repeater-Bus connector  
(IRB1 or IRB2) of the bottom ST80.  
Connect the other end of the cable to  
the corresponding IRB connector of  
the top ST80 (i.e., the IRB cable is  
connected from IRB1 to IRB1, or from  
IRB2 to IRB2). If additional ST80  
PWR  
AUI  
Magnum ST80 Stackable Personal Hub  
UP-LINK  
Ports  
1
2
3
4
5
6
7
8
Three stacked ST80s - 24 RJ-45 ports  
Personal Hubs are to be added,  
PWR  
AUI  
Magnum ST80 Stackable Personal Hub  
connect another IRB cable from the  
unused IRB connector of the existing  
stack’s top unit to the corresponding  
IRB connector of the ST80 Personal  
Hub to be added. Be sure that the  
Stack Enable Switch of the added unit  
is set to the “ON” position. Up to five  
UP-LINK  
Ports  
1
2
3
4
5
6
7
8
Four stacked ST80s - 32 RJ-45 ports  
Stackable Personal Hubs may be  
connected in this fashion.  
PWR  
AUI  
Magnum ST80 Stackable Personal Hub  
UP-LINK  
4
Ports  
1
2
3
5
6
7
8
Each unit of the stack must be  
powered by its own external power  
supply unit. “Power on” is verified by  
observing that the PWR LED of each  
unit is illuminated. Should one unit of  
the stack be powered down, the  
remainder of the stack will still function  
Five stacked ST80s - 40 RJ-45 ports  
Increased port capacity via stacking  
properly.  
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3.10  
Cascading the ST80 Personal Hub with the Up-Link port  
Stackable Personal Hubs may be cascaded in order to expand existing  
networks. For example, an ST80 may be cascaded via the switchable up-link port into  
any port of another hub. Also, Stackable Personal Hubs may be connected to a backbone  
via the rear AUI port. With the addition of a mini-transceiver, the AUI port may be used  
to connect to any standard Ethernet media. (ST80-B and ST80-F Personal Hubs may  
connect directly to 10BASE2 and multi-mode Fiber, respectively.) Since each ST80  
provides full repeater functionality, cascaded units can operate together even though  
there may be a full segment of distance between them.  
Port 8 Up-Link  
PWR  
AUI  
Magnum ST80 Stackable Personal Hub  
Port 8 Up-Link  
switch in X position  
UP-LINK  
K  
switch in == position  
Ports  
1
2
3
4
5
6
7
8
Magnum ST80 Stackable Personsal Hub  
PWR  
AUI  
Magnum ST80 Stackable Personal Hub  
UP-LK  
Ports  
1
2
3
4
5
6
7
8
PWR  
AUI  
Magnum ST80 Stackable Personal Hub  
UP-LNK  
Ports  
1
2
3
4
5
6
7
8
Users and devices  
Users and devices  
Users and devices  
Based on the "four repeater rule" defined by Ethernet standards, there may be a  
maximum of four units in any one chain between any two users. Note that a stack of  
ST80s is a single “unit” for repeater functionality.  
Magnum ST80 hubs may also be cascaded in networks with other Magnum  
Hubs (such as Magnum Personal Hubs, Magnum 1000 Workgroup Hubs, and Magnum  
3000 Stackable Hubs and Concentrators) as well as with Ethernet hubs from other  
manufacturers.  
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4.0  
OPERATION  
This section details the various operational features of Magnum ST80 Personal  
Hubs, including a description of the LED indicators. Stackable Personal Hubs are fully  
compliant with the Ethernet Version 2/IEEE 802.3 Repeater Specification for CSMA/CD  
10 Mbps operation and will function accordingly.  
4.1  
Functional Operation, Use of LED Indicators  
Power On (PWR) LED: Illuminates GREEN to show proper DC power.  
Collision (COL) LED: Illuminates YELLOW whenever a transmit collision  
occurs on a port within the hub.  
Link Status and Transmit (LINK/TX) LED: Per port LEDs detect and  
indicate by illuminating GREEN that there is proper connectivity on a 10BASE-  
T network segment. The LED will turn off intermittently when the port  
transmits a packet. In the event that connectivity is lost between the ends of that  
segment or a loss of power occurs in the segment at either end, the LED is  
turned off.  
Note: When port 8 is wired for up-link to another hub, the LINK LED  
will normally be on when the up-link switch is set to the “X” position. With the  
up-link switch off (“==”), LINK is off as the up-link is disabled. This permits  
local operation of the ST80 Personal Hub with full bandwidth.  
Polarity and Receive (POL/RX) LED: Per port LEDs intermittently  
illuminate GREEN to indicate that data packets are being received from the  
segment. This provides a visual indication of network activity for re-assurance  
of normal operation, and is also helpful in troubleshooting. If reversed polarity  
is detected, the LED becomes steady GREEN (the ST80 automatically  
compensates for the reversed polarity and resumes normal operation).  
Partitioning and Re-connection: Stackable Personal Hubs will automatically  
partition any port where 32 consecutive collisions or 6.5 ms of continuous  
transmissions occurs. Network integrity is checked every 800 ms and segment  
re-connection occurs after one 512-bit packet is transmitted without error. The  
status LEDs of a partitioned port indicate the partitioned state by blinking  
alternately.  
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Preamble Regeneration: Stackable Personal Hubs add preamble bits so that  
output packets contain a minimum 64-bit preamble per the Ethernet standard.  
Collisions: When carrier is detected simultaneously on multiple ports, a jam  
pattern is generated on each port to create a collision condition. When a  
collision signal from one port is detected, it generates a jam pattern to other  
ports.  
Fragment Extension: Stackable Personal Hubs will automatically add bits to a  
received data packet of less than 96 bits (a "fragment") so that the minimum  
output packet to the other port is 96 bits long.  
4.2  
Using the Up-Link switch  
Port 8 of the ST80 is equipped with an up-link switch to allow  
connection to another hub or concentrator without a special crossover cable.  
When set to the “=” position, port 8 is set up as a user port. When the switch is  
in the “X” position, port 8 operates as an up-link port. To ensure that the up-  
link switch is in the proper position, observe port 8’s LINK/TX LED. If this  
LED is illuminated or flickering, the switch is properly set. If it is off, try the  
other switch position. If neither position seems to work, check the 10BASE-T  
cable and the connected device for proper installation. For more information on  
the up-link switch, see Sections 3.8 and 3.10, “Switchable Up-Link Option” and  
Cascading the ST80 Personal Hub with the Up-Link port”.  
4.3  
Using the BNC Internal Termination Switch (Model ST80-B only)  
Model ST80-B is equipped with a rear-mounted BNC connector with an  
internal termination switch. This switch allows connection to 10BASE2 cable without  
use of an external “T” type terminator. When set to the left position, external termination  
is required. When the switch is in the right position, the connector is internally  
terminated. For more details on the internal termination switch, see Section 3.6, “BNC  
Connection”.  
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4.4  
Using the Stack Enable switch  
The Stack Enable switch of the ST80 is used to configure each unit of the  
stack. If an ST80 is being used as a non-stacked unit, the Stack Enable switch must be in  
the “OFF” position. When two or more ST80s are stacked, the bottom unit should be set  
to the “OFF” position, and all other units should be in the “ON” position. For further  
information about the Stack Enable switch, see Section 3.9, “Stacking the ST80s”.  
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5.0  
TROUBLESHOOTING  
All Magnum Ethernet products are designed to provide reliability and consistently  
high performance in all network environments. The installation of Magnum ST80 Stackable  
Personal Hub is a straightforward procedure (see INSTALLATION, Section 2.6); the  
operation is also straightforward and is discussed in Section 4.  
Should problems develop during installation or operation, this section is intended  
to help locate, identify and correct these types of problems. Please follow the suggestions  
listed below prior to contacting your supplier. However, if you are unsure of the procedures  
described in this section or if the Magnum ST80 Stackable Personal Hub is not performing as  
expected, do not attempt to repair the unit; instead contact your supplier for assistance or  
contact GarrettCom Customer Support.  
5.1  
Before Calling for Assistance  
1.  
If difficulty is encountered when installing or operating the unit, refer back to the  
Installation Section of the applicable chapter of this manual. Also check  
that the various components of the network are interoperable.  
to make sure  
2.  
3.  
4.  
Check the cables and connectors to ensure that they have been properly  
connected and the cables/wires have not been crimped or in some way  
impaired during installation. (About 90% of network downtime can be  
attributed to wiring and connector problems.)  
Make sure that an AC power cord is properly attached to each Magnum ST80  
Stackable Personal Hub unit. Be certain that each AC power cord is plugged into a  
functioning electrical outlet. Use the PWR LEDs to verify each unit is receiving  
power.  
If the problem is isolated to a network device other than the Magnum ST80  
Stackable Personal Hub product, it is recommended that the problem device is  
replaced with a known good device. Verify whether or not the problem is  
corrected. If not, go to Step 5 below. If the problem is corrected, the Magnum  
ST80 Stackable Personal Hub and its associated cables are functioning properly.  
5.  
If the problem continues after completing Step 4 above, contact your supplier of  
the Magnum ST80 Stackable Personal Hub unit or if unknown, contact  
GarrettCom, Inc.by fax, phone or email ([email protected]) for assistance.  
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5.2  
When Calling for Assistance  
Please be prepared to provide the following information.  
1.  
A complete description of the problem, including the following points:  
a. The nature and duration of the problem;  
b. Situations when the problem occurs;  
c. The components involved in the problem;  
d. Any particular application that, when used, appears to create the problem;  
2.  
3.  
An accurate list of GarrettCom product model(s)involved, with serial number(s).  
Include the date(s) that you purchased the products from your supplier.  
It is useful to include other network equipment models and related hardware,  
including personal computers, workstations, terminals and printers; plus, the  
various network media types being used.  
4.  
A record of changes that have been made to your network configuration prior  
to the occurrence of the problem. Any changes to system administration  
procedures should all be noted in this record.  
5.3  
Return Material Authorization (RMA) Procedure  
All returns for repair must be accompanied by a Return Material Authorization  
(RMA) number. To obtain an RMA number, please use this URL -  
have the following information readily available:  
Name and phone number of your contact person.  
Name of your company / institution  
Your shipping address  
Product name  
Serial Number (or Invoice Number)  
Packing List Number (or Sales Order Number)  
Date of installation  
Failure symptoms, including a full description of the problem.  
GarrettCom will carefully test and evaluate all returned products, will repair products  
that are under warranty at no charge, and will return the warranty-repaired units to the  
sender with shipping charges prepaid (see Warranty Information, Appendix A, for  
complete details). However, if the problem or condition causing the return cannot be  
duplicated by GarrettCom, the unit will be returned as:  
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No Problem Found.  
GarrettCom reserves the right to charge for the testing of non-defective units  
under warranty. Testing and repair of product that is not under warranty will result in a  
customer (user) charge.  
5.4  
Shipping and Packaging Information  
Should you need to ship the unit back to GarrettCom, please follow these instructions:  
1. Package the unit carefully. It is recommended that you use the original container  
if available. Units should be wrapped in a "bubble-wrap" plastic sheet or bag for  
shipping protection. ( You may retain all connectors and this Installation Guide.)  
CAUTION: Do not pack the unit in Styrofoam "popcorn" type packing  
material. This material may cause electro-static shock damage to the unit.  
2. Clearly mark the Return Material Authorization (RMA) number on the  
outside of the shipping container.  
3. GarrettCom is not responsible for your return shipping charges.  
4. Ship the package to:  
GarrettCom, Inc.  
47823 Westinghouse Dr.  
Fremont, CA 94539  
Attn.: Customer Service  
APPENDIX A: WARRANTY INFORMATION  
GarrettCom, Inc. warrants its products to be free from defects in materials and  
workmanship for a period of three (3) years from the date of shipment by  
GarrettCom.  
During this warranty period, GarrettCom will repair or, at its option, replace  
components in the products that prove to be defective at no charge other than  
shipping and handling, provided that the product is returned pre-paid to GarrettCom.  
This warranty will not be effective if, in the opinion of GarrettCom, the  
product has been damaged by misuse, misapplication, or as a result of service or  
modification other than by GarrettCom.  
GarrettCom reserves the right to make a charge for handling and inspecting  
any product returned for warranty repair which turns out not to be faulty.  
Please complete the warranty card as this acts as a product registration, and  
mail it to GarrettCom within two weeks of your purchase.  
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