3Com 5108M-TP User Manual

ONline Ethernet 10BASE-T

Module

User’s Guide

Document Number 17-00141-3

Printed March 1995

Model Number: 5108M-TP

3Com Co rporation 118 Turnpike Road

Southbo rough, MA 01772-1886

U.S.A.

(508) 46 0- 8900

FAX (508) 460-8950

Federal Communications Comm ission 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 reasonable protection against harmful interference when the equipment i s 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 rad io communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case you must correct the interference at your own expense.

Canadian Emissions Requirements

This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations.

Cet apparei l numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.

VDE Class B Compl ianc e

Hiermit wird bescheinigt, dass der 5108M-TP in Üebereinstimmung mit den Bestimmungen der Vfg 243/1991 funkentstöert ist.

Der Deutschen Bundespost wurde das Inverkehrbringen dieses Geraetes angezeigt und die Berechtigung zur Üeberprüefung der Serie auf Einhaltung der Bestimmungen eingeräeumt.

Einhaltung mit betreffenden Bestimmugen kommt darauf an, dass geschirmte Ausfuehrungen gebraucht werden. Fuer die Beschaffung richtiger Ausfuehrungen ist der Betreiber verantwortlich.

This is to certify that the 5108M-TP is shielded against radio interference in accordance with the provisions of Vfg 243/1991.

The German Postal Services have been advised that this equipment is being placed on the market and that they have been given the right to inspect the series for compliance with regulations.

Compliance with applicable regulations depends on the use of shielded cables. The user is responsible for procuring the appropriate cables.

EN55022/CISPR22 Com p lian ce

This equipment conforms to the Class A emissions limits for a digital device as defin ed by EN55022 (CISPR22).

VCCI Class 1 Compliance

This equipment is in the 1st Class category (information equipment to be used in commercial or industrial areas) and conforms to the

standards set by the V oluntary Control Council for Inter fere nce by Information Technology Equipment aimed at preventing radio interference in commercial or industrial areas.

Consequently, when the equipment is used in a residential area or in an adjacent area, r adio interferenc e may be caused to radio and TV receivers, and so on.

Read the instructions for correct handling.

UK General Approval Statem en t

The ONcore Switching Hub, ONline System Concentrator, and ONsemble StackSyste m Hub are manufactur ed to the International Safety Standard EN 60950 and are approve d in the UK under the Genera l Approval Number NS/G/12345/J/100003 for indirect connection to the public telecommunication network.

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.

1995, by Chipcom Corporation, a subsidiary of 3Com Corporation. Printed in U.S.A. All rights reserved. 3Com is a registere d trade mark of 3Com Corporat ion. ONcore is a registered trademark of Chipcom Corporation. 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.

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 tradem arks as our own.

Artel, Chipcom, Ethermo d em, Galactica, ONcore, ORnet, StarBridge, and Tr iChannel are reg ister e d tra demark s of C hipcom Corporation.

Chipcom OpenHub, G-Man, LANsentry, MultiProbe, ONdemand, ONline, ONsemble, PowerRing, SL2000, SL3000, SL4000, StackJack, StackSystem, and SwitchCentral are trademarks of Chipcom Corporation.

The Chipcom Multichannel Architecture Communications System is registered under U.S. Patent Number 5,301,303.

DEC, DECnet, the Dig ital l ogo, DELNI, POLYCENTE R, VAX , VT100, and VT220 are trademarks of Digital Equipment Corporation.

IBM is a registered trademark of Interna tional Business Machines. NetView is a trademark of International Business Machi nes.

ii ONline Ethernet 10BASE-T Module User’s Guide

XNS is a trade mark a nd Ethernet is a r egistered trademark of Xerox Corporation.

3ComFacts, Ask 3Com, CardFacts, NetFacts, and CardBoard are service marks of 3Com Corporation.

3Com, LANplex, BoundaryRouting, LanScanner, LinkBuilder, NETBuilder, NETBuilderII, ParallelTasking, ViewBuilder, EtherDisk, Etherl\Link, Ether Link Plus, EtherLink II, T ok enLink, T okenLink Plus, and TokenDisk are registered trademarks of 3Com Corporation.

3ComLaser Library, 3TECH, CacheCard, FDDILink, FMS, NetProbe, SmartAgent, Star-Tek, and Transcend are trademarks of 3Com Corporation.

CompuServe is a registered trademark of CompuServe, Inc. 3Com registered trademarks are registered in the United Stat es,

and may or may not be register ed i n other countrie s. Other brand and product names may be reg istered tradema rks or trademark s of their respective holders.

Restricte d Righ ts

Use, duplication, or disclosure by the Government is s ubject to restrictions as set forth in subparagraph (c)(1) (ii) of the Rights in Technical Data and Compu ter Software clause at DFARS 252.227-7013.

Printed on recycled paper.

ONline Ethernet 10BASE-T Module User’s Guide iii

iv ONline Ethernet 10BASE-T Module User’s Guide

How to Use This Guide

Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii i

Structure of This Guid e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xiv

Document Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv

Related D ocuments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xvi

3Com Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii

Reference Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii

Chapter 1 — Introduction

The ONline Ethernet 10BASE-T Module . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Dip Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Dip Switch SW1 (Port Status) . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Dip Switch SW3 (Crossover Mode, Channel Select, Squelch) . . . . 1-6

Dip Switch SW6 (Link Integrity ) . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

Related Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 -10

LED and Channel Verification . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

The ONline Ethernet Network Management Mod ule . . . . . . . . . 1 -11

Contents

Chapter 2 — Designing and Expanding the Network

Understanding th e General Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Basic Network Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

LAN Equivalence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Fiber Backbone, Twisted Pair To-The-Desk . . . . . . . . . . . . . . . . . . . . . . . 2-7

Fiber Backbone, Twisted Pair To-The-Desk Example . . . . . . . . . . . 2-8

Twisted Pair Backbone, Twisted Pair To-The-Desk . . . . . . . . . . . . . . . . . 2-11

Redundant Links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 -12

Patch Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

ONline Ethernet 10BASE-T Module User’s Guide v

Chapter 3 — Installing and Operating the Modu le

Precautionary Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Unpacking Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Installation Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Chapter 4 — Troubleshooting

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Troubleshooting W ith the Status LEDs . . . . . . . . . . . . . . . . . . . . . . . 4-1

Troubleshooting W ith the Activity LEDs . . . . . . . . . . . . . . . . . . . . . . 4-5

Technical Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Appendix A — Specifications

ONline Ethernet 10BA S E-T Module Spec ific ations . . . . . . . . . . . . . . . . . . A-1

Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

Environmental Spec ific ation s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-2

Mechanical Specificatio ns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

General Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-2

Twisted Pair Connectors and Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

Twisted Pair Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-3

Twisted Pair Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Connecting Twi sted P air Cable s . . . . . . . . . . . . . . . . . . . . . . . . .A-5

Appendix B — Technical Support

On-line Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

Email Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2

World Wide Web Site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2

Support from Your Netw ork Sup plier . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2

Support from 3Com . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3

Returning Produ cts for Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-4

Accessing the 3Com MIB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-4

3Com Technical Publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-5

Index

vi ONline Ethernet 10BA SE-T Module User’s Guide

Figures

Figure 1-1. 10BASE-T Module Faceplate and ONline

Figure 1-2. 10BA S E-T Module and Dip Switc h Lo catio ns . . . . . . . . . . 1-5

Figure 2-1. Sample Conf iguration Distance Calculation . . . . . . . . . . . 2-9

Figure 2-2. Unshielded Twisted Pair Network . . . . . . . . . . . . . . . . . 2-11

Figure 2-3. Redundant Tw isted Pair Conf igu ration . . . . . . . . . . . . . 2-12

Figure 3-1. Installing a 10BA SE-T Modu l e . . . . . . . . . . . . . . . . . . . . . 3-3

Figure 3-2. 10BA S E-T Module Cable Co nn ectio n . . . . . . . . . . . . . . . 3-4

Figure A-1. RJ45 Connecto r Pin-out s . . . . . . . . . . . . . . . . . . . . . . . . .A-4

System Concentrato r . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

ONline Ethernet 10BASE-T Module User’s Guide vii

viii ONline Ethernet 10BASE-T Module User’s Guide

Tables

Table 1-1. Interpretation of the 10BASE-T Modu le LEDs . . . . . . . . . . 1-4

Table 1-2. Dip Switch SW1 Settings and Interpret ations . . . . . . . . . . 1-6

Table 1-3. Dip Switch SW3 Settings for Switches 1 and 4. . . . . . . . . 1-7

Table 1-4. Dip Switch SW3 Settings and Interpretation s for

Switches 2 and 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

Table 1-5. Dip Switch SW6 Settings and Interpret ations . . . . . . . . . 1-10

Table 1-6. Channel Check Codes . . . . . . . . . . . . . . . . . . . . . . . . . . 1 -11

Table 2-1. Seven Basic Network Rules. . . . . . . . . . . . . . . . . . . . . . . . 2-3

Table 2-2. LAN Produc t Equi valent Distance s . . . . . . . . . . . . . . . . . . 2-6

Table 2-3. Maximum Link Distance on Twisted Pair. . . . . . . . . . . . . 2-10

Table 4-1. Troubleshooting With the Port Status LEDs . . . . . . . . . . . 4-2

Table 4-2. Troubleshooting With the Port Activ ity L EDs . . . . . . . . . . . 4-5

ONline Ethernet 10BASE-T Module User’s Guide ix

The ONline™ Ethernet 10BASE-T Module User’s Guide describes the features, indicators, and installation procedures for the O Nline Ethernet 10BASE-T Module. Information on troubleshooting and diagnostics is included for verifying operation. This guide also contains a configuration section which will be helpful when you plan your netwo rk configuration.

Audience

This guide is intended for the following people at your site:

How to Use This Guide

❑ Network manager or administrator ❑ Hardware installer

ONline Ethernet 10BASE-T Module User’s Guide xi

Structure of This Guide

This guide contains the following chapters: Chapter 1, Introducti on –Introduces the principal features of the ONline

Ethernet 10BASE-T Module and provides views and descriptions of the front panel and the dip switches on the module.

Chapter 2, Designing and Expanding the Network – Shows and explains examples of possible network configurations using the ONline System Concentrator and the ONline Ethernet 10BA SE- T M od ule. These examples include both shielded and unshielded twisted pair configurations.

Chapter 3, Install ing and Operating the Module – Provides illustrated procedures for installing the 10BASE-T Module into the ONline System Concentrator.

Chapter 4, Troubleshooting –Provides help in isolating and correcting problems that may arise during the installation process and during normal operation.

Appendix A, Specifications – Provides electrical, environmental, and mechanical specifications, as well as other information for the module.

Appendix B, Technical Support – Lists the various methods for contacting the 3Com technical suppor t organization and for accessing other product support services.

Index

xii ONline Ethernet 10BASE-T Module Us er’s Guide

Document Conventions

The following document conventions are used in this manual:

Convention Indicates Example

Courier text User input In the Agent Information Form,

System output After pressing the Apply

enter MIS in the New Contact field.

button, the system displays the message Transmi tt in g da ta .

Bold command string

Italic text in braces User-substituted

Capitalized text in plain brackets

Italics Text emphasis,

Path names Before you begin, read the

identifiers

Keyboard entry by the user

document titles

readme.txt file located in /usr/snm/agents.

Use the following command to show port details:

SHOW PORT {

Type your password and press [ENTER].

Ensure that you press the Apply button after you add the new search parameters.

slot

.all} VERBOSE

ONline Ethernet 10BASE-T Module User’s Guide xiii

Convention Indicates Example

Note: A Note. The

Caution: A Caution. A

Warning: A Warning. A

The ONline Ethernet 10BASE-T Module

The ONline™ Ethernet 10BA SE-T Modu le is an eight-port IEEE 802.3 repeater module that complies with the 10BASE-T standard. This module works with the 3Com ONline System Concentrator using both unshielded and shielded twisted pair wiring. The ONline 10BASE-T Module provides the following features and benefits:

❑ supports up to 150 meter link distances on 22 gauge wire, up to 125

meters on 24 gauge wire, and up to 100 meters on 26 gauge wire

❑ supports up to 200 meter link distance on IBM Type 1 cabling ❑ complies fully with the 10BASE-T standard ❑ features “hot swap” capability so that you can install or remove the

module wit hout having to power down the concentr at or

The 10BASE-T Mod ule works with both unshielded and shielded twisted pair wire. A single module can support any mix of shielded and unshielded twisted pair connections. For example, ports 1, 2, and 6 can be unshielded

Introduction 1 - 1

twisted pair connections while ports 3, 4, 5, and 7 are shielded twisted pair connections.

In addition to complying with the 10BASE-T standard, each port provides support for features that are beyond the scope of the 10BASE-T standard:

Before installing the Ethernet 10BASE-T Module, read the ONline System

Concentrator In stallation and Operation G uide.

Indicators

The 10BASE-T Module has eight Activity and eight Status LEDs on the front panel that indicate the state of each port on the module. Figure 1-1 shows the locations of these indicators and T able 1-1 describes how to read them.

❑ supports shielded twisted pair cable ❑ allows Low Squelch level (which significantly increases achievable link

distances)

❑ allows Link Integrity to be disabled (which allows connection to some

equipment which does not conform to the 10BASE-T standard)

1 - 2 ONline Ethernet 10BASE-T Module User’s Guide

Figure 1-1. 10BASE-T Module Faceplate and ONline

System Concentrator

Introduction 1 - 3

Table 1-1. Interpretation of the 10BASE-T Module LEDs

LED Name Color State Indicates

Activity (Ports 1-8)

Status (Ports 1-8)

yellow Off No packets are received on

the segment.

On Constant activity on the

segment.

Blinking Normal activity on the

segment.

green Off Port disabled.

On Port enabled and Link

Integrity is functional. 1 blink Link Integrity error. 2 blink s Jabber error or port

partition ing. Timed blinks (LED

is on for 10 seconds, blinks off for 400 msecs)

Link Integrity disabled for

this active port.

Dip Switches

The 10BASE-T Mod ule has three dip switches located on the module:

❑ 8-switch dip switch (SW1) ❑ 4-switch dip switch (SW3) ❑ 8-switch dip switch (SW6)

1 - 4 ONline Ethernet 10BASE-T Module User’s Guide

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