3Com 5101T-FB-FC, 5101T-FB-ST, 5101T-FB-SMA User Manual
®
10BASE-FB Transceiver
Installation Guide
Document Number 17-00325-3
Model Numbers: 5101T-FB-SMA
5101T-FB-ST
5101T-FB-FC
3Com Corporation
118 Turnpike Road
Southborough, MA 01772-1886
U.S.A.
Federal Communications
Commission Notice
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 re asona ble 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
his own expense.
Canadian Emissions Requirements
Cet appareil numérique respecte les limites de bruits radioélectriques applicables aux appareils numériques de Class A prescrites
dans le norme sur le materièl brouilleur : “Appareils Numériques”,
NMB-003 édictée par le ministrè des Communications.
This digital apparatus does not exceed the Class A limits for radio
noise emissions from digital apparatus as set out in the interference-causing equipment standard entitled “Digital Apparatus”,
ICES-003 of the Department of Communications.
Page ii
VDE CLASS B COMPLIANCE
Hiermit wird bescheinigt, dass der (5101T-FB) in Uebereinstimmung mit den Bestimmungen der Vfg 243/1991 funk-entstort ist.
Der Deutschen Bundespost wurde das Inverkehrbringen dieses
Gerates engezeigt und die Berechtigung zur Ueberprufung der
Serie auf Einhaltung der Bestimmungen eingeraumt.
This is to certify that the (5101T-FB) is shielded against radio interference in accordance with the provisions of Vfg 243/1991.
The German Postal Services have been advised that this device is
being put on the market and that they have been given the right
to inspect the series for compliance with the regulations.
CAUTION
Do not install in air ducts or plenums. For installation in other
environmental air handling spaces, use only with cable classified
by Underwriters Laboratories as to fire and smoke characteristics
in accordance with Section 770-2(b) and Section 725- 2(b) of the
National Electrical Code.
DISCLAIMER
The information in this document is subject to change without
notice and should not be construed as a commitment by 3Com
Corporation. 3Com Corporation assumes no responsibility for any
errors that may appear in this document.
Page iii
COPYRIGHT STATEMENT
ø19 96 by 3Com Corporation. All rights reserved. The information
contained herein is the exclusive and confidential property of
3Com Corporation. No part of this manual may be disclosed or
reproduced in whole or in part without permission from 3Com
Corporation.
Printed in the U.S.A.
TRADEMARKS
Because of the nature of this material, numerous hardware and
software products are mentioned by name. In most, if not all
cases, these product names are claimed as trademarks by the
companies that manufacture the products. It is not our intent to
claim these names or trademarks as our own.
The ONline logo, TriChannel, and Midnight are trademarks, and
Ethermodem, ORnet, ONcore, and Chipcom are registered
trademarks of 3Com Corporation.
Ethernet is a registered tr ademark of Xerox Corporation.
DEC, the digital logo, DELNI, DECnet, and VAX are trademarks of
Digital Equipment Corporation.
IBM is a registered trademark of International Business Machines.
Page iv
Table of Contents
Table of Contents ................................................. v
Preface.................................................................. 1
Intended Audience............ ......... ... ......... ...... 1
Transceiver Overview .......................................... 3
Transceiver Top Panel.................................. 3
Transceiver Front Panel..................... ......... ......... . 6
Transceiver Rear Panel............................... ..........7
Alternate Collision Mode ........ ..................... 9
SQE Test .......................................... .......... 10
High Power (PWR) .................................... 10
Half Step Mode ........... ...... ...... ...... ...... ...... . 11
Installation................................... ......... ......... ... .. 11
Site Preparation and Placement.................. 12
Unpacking Procedures ....................... ................. 13
Verifying Transceiver Switch Settings...............14
Connecting to Ethernet V2.0 and IEEE 802.3
Controllers..........................................................17
Connecting to Ethernet V2.0 and IEEE 802.3
Repeaters............................................................ 18
Connecting Fiber Cables....................................19
Page v
Connecting the AUI Cable......................... 20
Verifying Physical Link Operation ............ 21
Troubleshooting.................................................. 22
Status LED ................................................. 22
Troubleshooting Link Problems................. 27
Troubleshooting System P r oblems.....................28
Excessive Collisions............................... .... 28
Late Collisions and Failure to Defer.......... 29
Miscellaneous Errors.................................. 30
Transceiver Cables .............................................31
Signal Differences....... ............................... 31
EEE 802.3 ....................... ......... ...........32
Version 2.0 .......................................... 32
Version 1.0 .......................................... 32
Wire Sizes ............................ ...................... 33
Cable Pinouts ............................................. 35
Troubleshooting Transceiver Cables..................37
Symptoms of Faulty Transceiver Cables.. . 37
Causes of Fault Transceiver Cables........... 38
Cable Recommendations............................ 39
Specifications .....................................................39
General Specifications ............................... 40
Page vi
Optical Interface Specifications. ................ 41
Transmit Power Specifications .................. 42
Fiber Optic Cables Compatibility .............. 42
Attachment Unit Interface Specificati ons .. 43
Page vii
Preface
This guide describes the features, DIP switch,
installation steps, operation verification, and
problem diagnosis for the 3Com 10BASE-FB
Transceiver.
Intended Audience
This guide is intended for use by installers, users,
and network managers. It does not include
detailed service information. This product must
be serviced by personnel at, or approved by,
3Com Corporation or the warranty is voided.
Before you use the 10BASE-FB Transceiver, read
this guide to familiarize yourself with the
product. Also read the reference manual for the
product to which you are connecting the
10BASE-FB Transceiver.
Page 1
This guide is divided into five sections:
■ Transceiver Overview - Describes the
transceiver controls and indicators.
■ Installation - Describes how to unpack,
power up, and verify transceiver operation.
■ Troubleshooting - Provides help in isolating
problems that can occ ur during installation
and provides procedures for correcting them
through use of the extensive diagnostic
features built into the product set.
■ AUI Cables and Pinouts - Describes common
problems with IEEE 802.3 and Ethernet
Transceiver (AUI) cables. Cable pinouts as
well as rules for proper cabling are
described.
■ Specifications - Describes the transceiver
optical specifications and AUI specifications.
Page 2
Transceiver Overview
This section provides descriptions of the AUI
connector, fiber optic ports, indicators, and DIP
switch on the transceiver front, rear, and top
panel (respectively). 3Com recommends that you
become familiar with these features prior to
installation.
Note: Do not under any circumstances
attempt to open the transceiver
enclosure.
Transceiver To p Panel
The top panel of the Transceiver contains a label
briefly describing:
■ LED blink sequences
■ Functions of the DIP switch
The DIP switch has four switches for configuring
transceiver operation.
Page 3
Figure 1 illustrates the top panel of the 3Com
10BASE-FB Transceiver. Table 1 provides a
description of the DIP switches.
Figure 1. Transceiver Top Panel
Table 1. Transceiver DIP Switch Settings
Switch Setting Description
1 Alternate
2 SQE Test Enables or disable s SQE
3 High
4 Half Step Enables Half Step Signaling
Collision
Power
Enables or disable s
Alternate collision
Presence Signaling mode.
Test.
Enables High Power.
Disable set tin g invokes
Normal Power.
on AUI Receive (DI) Pa ir.
Disable set tin g invokes Full
Step Signaling.
Page 5
Transce i ver Front Panel
The Transceiver front panel contains the 15-pin
AUI (Attachment Unit Interface) connector. The
AUI 15-pin D subminiature male connector
conforms to IEEE 802.3 and Ethernet Version 2.0
requirements. The shell of the connector is not
insulated from the transceiver case, thereby
providing optimal shielding and minimizing
radiation.
Figure 2 shows the AUI connector on the
Transceiver front panel.
Figure 2. Trans ceiver Front Panel
Page 6
Transceiver Rear Panel
The Transceiver rear panel contains the Fiber
Optic (SMA, ST, or FC) connectors and four indicators (LEDs). The LEDs provide status for:
■ Fiber link (transmit and receive)
■ SQE Test
■ Ports
The LEDs can be On, Off, or Blinking. The number of consecutive blinks before a longer pause
on the STA (status) LED indicates the type of failure detected on the link. For ease of interpretation, a table is printed on the top panel of the
transceiver to briefly describe the type of failure.
This table is also repeated in greater detail in the
Troubleshooting section later i n this manual.
Refer to the Troubleshooting section later in this
manual for a description of the LED blink
sequences.
Page 7
Figure 3 shows the rear panel on the 10BASE-FB
Transceiver. Table 2 provides a description of the
LEDs.
Figure 3. Trans ceiver Rear Panel
Page 8
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