Transition Networks TX12 User Manual

For assistance in installing, using, or
maintaining the TRANSITION Networks
StackMaster™ TX12 100BASE-TX 12-Port
Stackable Hub, contact TRANSITION
Networks Technical Support

at:

[phone]

or contact your local distributor.

33010.B

StackMaster TX12

(SMHB-E-TX-12)

100BASE-TX

12-Port Stackable Hub

STACKMASTER TX12 SPECIFICATIONS

Standards

IEEE 802.3u 100BASE-TX
Class 1 (stacked)
Class 2 (unstacked)

Physical

Dimensions

17’ x 10’ x .1.8’ (438 mm x 255 mm x 45 mm)

Shipping Weight

9 lbs (4.1 kg)

Input Power

Internal universal input; 100–240VAC, 50/60 Hz, 53W

AC Input Cord:

TN PN Requirement Location
3344 120 volts, 60 hertz USA/Canada/Mexico
3344 100 volts, 50-60 hertz Japan
3347 230 volts, 50 hertz Europe
3348 240 volts, 50 hertz Australia
3349 240 volts, 50 hertz United Kingdom

MTBF

50,000 hours

Environment

Temperature: 0-50°C (32° to 122° F )
Humidity 10-90%, non condensing
Altitude 0-10,000 feet

Warranty

Lifetime

17

™

StackMaster™ TX12 100BASE-TX 12-Port Stackable Hub

16

CAUTION: RJ connectors are NOT INTENDED FOR
CONNECTION TO THE PUBLIC TELEPHONE
NETWORK. Failure to observe this caution could result
in damage to the public telephone network.

Compliance Information
UL Listed
C-UL Listed (Canada)
CISPR/EN55022 Class A

FCC Regulations

This equipment has been tested and found to comply with the limits for a class
A digital device, pursuant to part 15 of the FCC rules. These limits are
designed to provide reasonable protection against harmful interference when
the equipment is operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and, if not installed
and used in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference, in which case the user
will be required to correct the interference at the user’s own expense.

Canadian Regulations

This digital apparatus does not exceed the Class A limits for radio noise for
digital apparatus set out on the radio interference regulations of the Canadian
Department of Communications.

European Regulations
Warning

This is a Class A product. In a domestic environment this product may cause
radio interference in which case the user may be required to take adequate
measures.

Copyright Restrictions

© 1996, 1997 TRANSITION Networks.
All rights reserved. No part of this work may be reproduced or used in any
form or by any means – graphic, electronic, or mechanical – without written
permission from TRANSITION Networks.

Trademark Notice

All registered trademarks and trademarks are the property of their respective
owners.

Der Anschluss dieses Gerätes an ein öffentlickes
Telekommunikationsnetz in den EG-Mitgliedstaaten verstösst gegen die
jeweligen einzelstaatlichen Gesetze zur Anwendung der Richtlinie
91/263/EWG zur Angleichung der Rechtsvorschriften der
Mitgliedstaaten über Telekommunikationsendeinrichtungen
einschliesslich der gegenseitigen Anerkennung ihrer Konformität.

100BASE-TX Cable and Connector Specifications

The physical characteristics of the 100BASE-TX cable must meet or
exceed IEEE 802.3u 100BASE-TX specifications.

100BASE-TX CABLE SPECIFICATIONS

Category 5 wire or better is required. Either shielded twisted pair
(STP) or unshielded twisted pair (UTP) can be used. DO NOT USE
FLAT OR SILVER SATIN WIRE.

Category 5:

Gauge 24 to 22 AWG
Attenuation 20 dB/1000’ @ 10 MHz
Impedance 100 Ω ±10% @ 10 MHz

Maximum Cable Distance: 100 meters (330 feet)

100BASE-TX CONNECTOR CHARACTERISTICS:

The 100BASE-TX connectors are standard RJ-45 connectors with
standard pinning.

The two active pairs in a 100BASE-TX network are pins 1 & 2 and
pins 3 & 6. Use only dedicated wire pairs (such as blue/white &
white/blue, orange/white & white/orange) for the active pins.
100BASE-TX cable for unlike devices (such as hub to terminal
device) must be configured as straight through; 100BASE-TX cable
for like devices (such as hub to hub or terminal device to terminal
device) must be configured as crossover.

NOTE: MDI/MDI-X connectors on hubs allow straight-through
cable to be used in a crossover configuration for hub to hub
connection.

Crossover Cable

Twisted
Pair #1

Twisted
Pair #2

Straight Through Cable

Twisted
Pair #1

Twisted
Pair #2

Connectors for unlike devices

Connectors for like devices

Table of Contents

1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . 1

The StackMaster TX12 Hub . . . . . . . . . . . . . . . . . . . . . . . . . .1

StackMaster TX12 Hub Features . . . . . . . . . . . . . . . . . . . . . . . .1

Networking the StackMaster TX12 Hub . . . . . . . . . . . . . . . . . . .2

StackMaster TX12 Hub Connectors and Status LEDs . . . . . . .3

RJ-45 Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

SCSI Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Power Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Status LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

2 SITE CONSIDERATIONS. . . . . . . . . . . . . . . . . . . . 4

3 INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Unpacking 12-Port Stackable Hub . . . . . . . . . . . . . . . . . . . . .5

Installing StackMaster™ TX12 in 19-inch Rack . . . . . . . . . . .6

Optionally Cascading 12-Port Stackable Hubs . . . . . . . . . . . .7

Using Port 12 to Cascade Two Hubs . . . . . . . . . . . . . . . . . . . . .7

Using SCSI Connectors to Cascade Stacked Hubs . . . . . . . . . . .8

Connecting 100BASE-TX Cable . . . . . . . . . . . . . . . . . . . . . . .9

Connecting Power to StackMaster™ TX12 . . . . . . . . . . . . . .10

4 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

5 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . 12

Fault Isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Technical Support Contact . . . . . . . . . . . . . . . . . . . . . . . . .12

WARRANTY STATEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

CABLE SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

STACKMASTER TX12 HUB SPECIFICATIONS. . . . . . . . . . . 17

StackMaster™ TX12

i

15

100BASE-TX 12-Port Stackable Hub

FAST ETHERNET (IOOBASE-X)

CABLE SPECIFICATIONS

Due to the limited collision domain in 100BASE-X, use the shortest
cables possible to make a connection between any two devices.
Where collisions are not a consideration (full duplex), longer
cable may be possible.

Effective cable distances are determined by ambient RF noise and
by signal loss in the cable. Since fiber has low signal loss/meter
and invulnerability to RF noise, fiber is the preferred medium for
extending distances.

100BASE-FX Cable and Connector Specifications

The physical characteristics of the 100BASE-FX cable must meet or
exceed IEEE 802.3 100BASE-FX specifications.

100BASE-FX CABLE SPECIFICATIONS

Fiber Optic Cable Recommended: 62.5 / 125 µm multimode fiber

Optional: 100 / 140 µm multimode fiber

85 / 125 µm multimode fiber
50 / 125 µm multimode fiber

Fiber Optic Transmitter Power:

Average power: -19.0 dBm

Fiber Optic Receiver Sensitivity:

Average sensitivity: -33.5 dBm
Bit error rate: ≤10

-10

Maximum Cable Distance: 2000 meters (6500 feet)

100BASE-FX CONNECTOR CHARACTERISTICS:

The 100BASE-FX connectors are standard ST connectors.
SC connectors are available.