3com CoreBuilder 5000 User Guide

CoreBuilder™ 5000

Ethernet 20-Port and 40-Port 10BASE-T Module User Guide

http://www.3com.com/

Document Number 17-00540-3 Published May 1997

3Com Corporation 5400 Bayfront Plaza Santa Clara, California 95052-8145

Copyright © 3Com Corporation, 1997. All rights reserved. No part of this documentation may be reproduced in any form or by any means, or used to make any derivative work (such as translation, transformation, or adaptation) without permission from 3Com Corporation. Portions of this document are reproduced in whole or part with permission from third parties.

3Com Corporation reserves the right to revise this documentation and to make changes in content from time to time without obligation on the part of 3Com Corporation to provide notification of such revision or change.

3Com Corporation provides this documentation without warranty of any kind, either implied or expressed, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. 3Com may make improvements or changes in the products or programs described in this documentation at any time.

UNITED STATES GOVERNMENT LEGENDS:

If you are a United States government agency, then this documentation and the software described herein are provided to you subject to the following restricted rights:

For units of the Department of Defense:

Restricted Rights Legend: Use, duplication, or disclosure by the Government is subject to restrictions as set forth in subparagraph (c) (1) (ii) for Restricted Rights in Technical Data and Computer Software Clause at 48 C.F.R. 52.227-7013.

For civilian agencies:

Restricted Rights Legend: Use, reproduction, or disclosure is subject to restrictions set forth in subparagraph (a) through (d) of the Commercial Computer Software – Restricted Rights Clause at 48 C.F.R. 52.227-19 and the limitations set forth in the 3Com Corporation standard commercial agreement for the software. Unpublished rights reserved under the copyright laws of the United States.

If there is any software on removable media described in this documentation, it is furnished under a license agreement included with the product as a separate document, in the hardcopy documentation, or on the removable media in a directory file named LICENSE.TXT. If you are unable to locate a copy, please contact 3Com and a copy will be sent to you.

Federal Communications Commission Notice

This equipment was 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 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 appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.

EMC Directive Compliance

This equipment was tested and conforms to the Council Directive 89/336/EEC for electromagnetic compatibility. Conformity with this directive is based upon compliance with the following harmonized standards:

EN 55022 – Limits and Methods of Measurement of Radio Interference EN 50082-1 – Electromagnetic Compatibility Generic Immunity Standard: Residential, Commercial, and

Light Industry Warning: This is a Class A product. In a domestic environment, this product may cause radio interference, in

which case you may be required to take adequate measures. Compliance with this directive depends on the use of shielded cables.

Low Voltage Directive Compliance

This equipment was tested and conforms to the Council Directive 72/23/EEC for safety of electrical equipment. Conformity with this directive is based upon compliance with the following harmonized standard:

EN 60950 – Safety of Information Technology Equipment

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 Voluntary Control Council for Interference 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, radio interference may be caused to radio and TV receivers, and so on.

Read the instructions for correct handling.

Fiber Cable Classification Notice

Use this equipment only with fiber 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.

UK General Approval Statement

The CoreBuilder 5000 Integrated System Hub and ONline System Concentrator are manufactured to the International Safety Standard EN 60950 and are approved in the U.K. under the General Approval Number NS/G/12345/J/100003 for indirect connection to the public telecommunication network.

Trademarks

Unless otherwise indicated, 3Com registered trademarks are registered in the United States and may or may not be registered in other countries.

3Com, Boundary Routing, CardFacts, EtherLink, LANplex, LANsentry, LinkBuilder, NETBuilder, NETBuilder II, NetFacts, Parallel Tasking, SmartAgent, TokenDisk, TokenLink, Transcend, TriChannel, and ViewBuilder are registered trademarks of 3Com Corporation.

3TECH, CELLplex, CoreBuilder, EtherDisk, EtherLink II, FDDILink, MultiProbe, NetProbe, and ONline are trademarks of 3Com Corporation.

3ComFacts is a service mark of 3Com Corporation. The 3Com Multichannel Architecture Communications System is registered under U.S. Patent

Number 5,301,303. AT&T is a registered trademark of American Telephone and Telegraph Company. Banyan and VINES are registered trademarks of Banyan Systems Inc. CompuServe is a registered trademark of CompuServe, Inc. DEC, DECnet, DELNI, POLYCENTER, VAX, VT100, VT220, and the Digital logo are trademarks of Digital

Equipment Corporation. Hayes is a registered trademark of Hayes Microcomputer Products. OpenView is a registered trademark of Hewlett-Packard Company. Intel is a registered trademark of Intel Corporation. AIX, IBM, and NetView are registered trademarks of International Business Machines Corporation. Microsoft, MS-DOS, Windows, Windows 95, and Windows NT are registered trademarks of

Microsoft Corporation. V30 is a trademark of NEC Corporation. NetWare and Novell are registered trademarks of Novell, Incorporated.

IPX is a trademark of Novell, Incorporated. OSF and OSF/Motif are registered trademarks of Open Software Foundation, Inc. ONC, OpenWindows, Solaris, Solstice, Sun, Sun Microsystems, SunNet Manager, and SunOS are trademarks

of Sun Microsystems, Inc.

iii

SPARCstation is a trademark licensed exclusively to Sun Microsystems Inc. OPEN LOOK is a registered trademark of Unix System Laboratories, Inc. UNIX is a registered trademark of X/Open Company, Ltd. in the United States and other countries. Other brand and product names may be registered trademarks or trademarks of their respective holders.

HOW TO USE THIS GUIDE

Audience 1 Structure of This Guide 2 Document Conventions 3 Related Documents 4

3Com Documents 4 Reference Documents 4

1 INTRODUCTION

CoreBuilder 5000 Ethernet 20/40-Port Module Description 1-2 CoreBuilder 5000 Ethernet 20/40-Port Module Features 1-2 CoreBuilder 5000 Ethernet 20/40-Port Module Benefits 1-3

20-Port Sample Module Application 1-5 Theory of Operation 1-6 Where to Go From Here 1-6

2 DESIGNING AND EXPANDING THE NETWORK

Understanding General Network Configuration Rules 2-1

Before Configuring Your Network 2-2

Basic Network Rules 2-2

LAN Product Distances 2-4 Configuring Fiber Backbone, Twisted Pair to-the-Desk 2-5

Fiber Backbone Configuration Rules 2-5

Configuration Example of Fiber Backbone, Twisted Pair

to-the-Desk 2-6

Fiber Backbone Configuration Verification 2-6 Configuring Twisted Pair Backbone, Twisted Pair to-the-Desk 2-7

Twisted Pair Backbone Configuration Rules 2-7

Configuration Example of Twisted Pair Backbone, Twisted

Pair-to-the-Desk 2-8

Using Patch Panels 2-9 Using Module Workgroups 2-9

Workgroup Definition 2-9 Dividing the Network into Workgroups 2-10

Workgroup Example 2-10

Setting Redundant Links 2-13

Setting Redundancy Between Two Ports on One 40-Port Module 2-14

Setting Redundancy Between Ports On Two 20/40-Port Modules 2-15

Where to Go From Here 2-16

3 INSTALLING AND OPERATING THE MODULE

Precautionary Procedures 3-2 Unpacking Procedures 3-2 Quick Installation 3-3 Setting DIP Switches 3-4

Using DIP Switches 3-4 Setting the DIP Switches 3-4

DIP Switch Definition 3-5 Installing the Module 3-7 Configuring the Module 3-10

Enable/Disable/

Shutdown Ports 3-11

Set Port Redundancy 3-12

Set Remote Diagnostics 3-12

Enable/Disable Link Integrity 3-13

Set Alert Filter 3-13

Set Auto Polarity 3-14

Set Port Squelch 3-14

Network Selection 3-15

Assigning Ports On the Module to a Network 3-15 Assigning a Monitor Card to a Network 3-15

Showing Module Configurations 3-16

Show Module Command 3-16

Show Port Command 3-17 Attaching the Network Monitor Card 3-18 Gathering Statistics 3-19

Gathering Statistics 3-19

Monitoring the Network 3-19

Monitor Command 3-20 Show Counter Command 3-21

Monitoring the Front Panel 3-22

Module Status LED 3-22

Port Status and Activity LEDs 3-22 Verifying LEDs and the Network 3-24

Using the CoreBuilder 5000 Controller Module to Verify Bi-Color LED

Operation 3-25

Using the DMM to Verify Network Connections 3-25 Where to Go From Here 3-26

4 TROUBLESHOOTING

Troubleshooting Using the Module Status LED 4-2 Troubleshooting Using the Port Status LEDs 4-3 Technical Assistance 4-4 Where to Go From Here 4-4

A SPECIFICATIONS

Electrical Specifications A-1 Environmental Specifications A-2 Mechanical Specifications A-2 General Specifications A-2 Twisted Pair Connectors and Cables A-3

Twisted Pair Connectors A-3

Twisted Pair Cables A-4

Connecting Twisted Pair Cables A-4

vii

B TECHNICAL SUPPORT

Online Technical Services B-1

World Wide Web Site B-2 3Com Bulletin Board Service B-2

Access by Analog Modem B-2

Access by Digital Modem B-2 3ComFacts Automated Fax Service B-3 3ComForum on CompuServe Online Service B-3

Support From Your Network Supplier B-4 Support From 3Com Corporation B-5 Returning Products for Repair B-6 Accessing the 3Com MIB B-6 Contacting 3Com Technical Publications B-7

INDEX

3COM CORPORATION LIMITED WARRANTY

viii

FIGURES

1-1 CoreBuilder 5000 Ethernet 20-Port and 40-Port Module 1-4 1-2 Typical 20-Port Module Application 1-5 2-1 Sample Configuration Distance Calculation 2-6 2-2 Unshielded Twisted Pair Network 2-8 2-3 Typical Corporate Organizational Structure 2-10 2-4 20-Port Module Workgroup Port Allocation 2-12 2-5 Redundant Twisted Pair Configuration 2-14 3-1 20/40-Port Module and DIP Switch Location 3-5 3-2 Installing a CoreBuilder 5000 Module 3-8 3-3 Opened and Closed Module Ejectors 3-9 3-4 20-Port Module Cable Connection 3-10 3-5 Remote Diagnostics Example 3-12 3-6 Attaching the CoreBuilder 5000 Ethernet Monitor Card 3-18 3-7 20-Port and 40-Port Module Faceplate 3-23

A-1 RJ-45 Connector Pinouts A-4

TABLES

2-1 Seven Basic Network Rules 2-2 2-2 LAN Product Equivalent Distances 2-4 2-3 Sample Network Reorganization 2-11 3-1 Quick Installation Checklist 3-3 3-2 Channel Select DIP Switch Settings 3-6 3-3 20/40-Port Module LED Interpretations 3-24 4-1 Module Status LED Troubleshooting 4-2 4-2 Port Status LED Troubleshooting 4-3

HOW TO USE THIS GUIDE

This guide explains how to install and operate the 3Com CoreBuilder throughout this guide as the 20/40-Port module). This guide also includes information on monitoring this module using a 3Com appendix explains cabling guidelines and options for the 20/40-Port module.

Before installing or using the 20/40-Port module, read Chapters 1, 2, and 3 of this guide for basic installation and operation instructions.



5000 Ethernet 20/40-Port 10BASE-T Module (referenced

CoreBuilder 5000 Distributed Management Module. An

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

■ Network manager or administrator

■ Hardware installer

2 HOW TO USE THIS GUIDE

Structure of This Guide

This guide contains the following chapters and appendix:

Chapter 1, Introduction – Introduces the functions and features of the CoreBuilder 5000 Ethernet 20/40-Port 10BASE-T Module.

Chapter 2, Designing and Expanding the Network – Shows possible network configurations using the CoreBuilder 5000 hub and the CoreBuilder 5000 Ethernet 20/40-Port Module.

Chapter 3, Installing and Operating the Module – Provides illustrated procedures for installing the 20/40-Port module into the CoreBuilder 5000 hub. Also shows front panel LEDs and DIP switches on the module and describes network management commands.

Chapter 4, Troubleshooting – Provides help in isolating and correcting problems that may arise when installing or operating this module.

Appendix A, Specifications – Provides electrical, environmental, and mechanical specifications for the module. Provides information on RJ-45 connectors and twisted pair cables.

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

Index

Document Conventions 3

Document Conventions

The following document conventions are used in this manual:

Convention Indicates Example

Courier text User input In the Agent Information Form,

enter MIS in the New Contact field.

System output After pressing the Apply button, the

Bold command string Path names Before you begin, read the

User-substituted identifiers

Capitalized text in plain brackets

Italics Text emphasis,

Icon Notice Type Alerts you to...

Information note Important features or instructions

Keyboard entry by the user

document titles

system displays the message Transmitting data.

readme.txt file located in

/usr/s nm /agen ts.

Type your password and press [ENTER].

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

Caution Risk of personal safety, system damage, or loss

Warning Risk of severe personal injury

of data

4 HOW TO USE THIS GUIDE

INTRODUCTION

This chapter describes the 3Com CoreBuilder 10BASE-T Module (Model Number 6120M-TPP) and the 40-Port 10BASE-T Module (Model Number 6140M-TPP). For more information on the CoreBuilder 5000 hub, refer to the CoreBuilder 5000 Integrated System Hub Installation and Operation Guide.

This chapter contains the following sections:

■ CoreBuilder 5000 Ethernet 20/40-Port Module Description

■ CoreBuilder 5000 Ethernet 20/40-Port Module Features

■ CoreBuilder 5000 Ethernet 20/40-Port Module Benefits

■ Theory of Operation

■ Where to Go From Here

™

5000 Ethernet 20-Port

1-2 INTRODUCTION

CoreBuilder 5000 Ethernet 20/40-Port Module Description

CoreBuilder 5000 Ethernet 20/40-Port Module Features

The 3Com® CoreBuilder 5000 Ethernet 20/40-Port 10BASE-T Module is a port-switching module which:

■ Supports RJ-45 based 10BASE-T wiring

■ Enables users to assign a backplane segment at the port level of the

module

The CoreBuilder 5000 Ethernet 20-Port 10BASE-T Module offers a single slot solution for networks utilizing RJ-45 connectors in their 10BASE-T installation. The CoreBuilder 5000 Ethernet 40-Port 10BASE-T Module offers an additional 20 ports in a two slot solution for networks with a large environment of RJ-45-based 10BASE-T wiring.

The 20/40-Port module connects up to 20 or 40 devices (PCs, terminals, printers, modems) to the 3Com CoreBuilder 5000 hub. The module provides 20 or 40 twisted pair Ethernet ports which may be switched individually to any of the CoreBuilder 5000 backplane channels or extended (isolated) segments.

The CoreBuilder 5000 Ethernet 20/40-Port 10BASE-T Module provides the following features:

■ Remote Diagnostics Mode – Checks driver and receiver integrity.

■ Private Line Card – Supports security through the private line card

(PLC). The PLC provides continuous eavesdropping and intrusion protection without impacting network performance.

■ Two Daughter Cards – Allows you to connect network monitor

cards for network management.

■ Hot swap capability – Allows you to install or remove the module

without having to power down the hub.

■ Scalable network management architecture – Enables you to

gather Ethernet and Remote Network Monitoring (RMON) network statistics for any of the CoreBuilder 5000 backplane segments. Includes up to two Network Monitor Cards (NMC) per module for in depth monitoring of the network.

In addition, both modules support Repeater Management Information Base (MIB) statistics without the need for a network monitor card.

CoreBuilder 5000 Ethernet 20/40-Port Module Benefits 1-3

CoreBuilder 5000 Ethernet 20/40-Port Module Benefits

The CoreBuilder 5000 Ethernet 20/40-Port 10BASE-T Module provides the following benefits:

■ Provides per-port switching to all eight of the CoreBuilder 5000

backplane segments and isolated segments. Supports up to eight segments, simultaneously, in any combination.

■ Provides IEEE Repeater statistics gathering for monitoring of the

CoreBuilder 5000 hub’s security and network management architecture.

■ Offers high port density at a low cost per port.

■ Supports up to 100 meters on 10BASE-T-compliant unshielded

twisted pair (UTP) wiring as well as shielded twisted pair (STP) wiring.

■ Supports the CoreBuilder 5000 Private Line Card for private Ethernet

conversations.

■ Maintains inventory information for the 20/40-Port module in

non-volatile RAM (NVRAM). Information includes the module serial number, power requirements, power class settings (for example, powerup priority), and date of manufacture and a user note pad for entering installation-specific information.

■ Supports CoreBuilder 5000 hub power management architecture

which enables administrators to prioritize the allocation of power to modules.

1-4 INTRODUCTION

Figure 1-1 illustrates the CoreBuilder 5000 Ethernet 20-Port and

40-Port 10BASE-T Modules.

RJ-45 (ports 1 to 20)

10X

11X

12X

13X

14X

15X

16X

17X

18X

19X

20X

10BASE-T E20PS-TP

TRAFFIC STA

MOD STA

10X

11X

12X

13X

14X

15X

16X

17X

18X

19X

20X

Module Status LED

Bi-Color Port Status/Activity LEDs

TRAFFIC STATUS

MODULE

STATUS

21X

22X

23X

24X

25X

26X

27X

28X

29X

30X

10X

31X

11X

12X

32X

13X

33X

13X

34X

14X

35X

15X

16X

36X

17X

37X

38X

18X

39X

19X

40X

20X

RJ-45 (ports 1 to 40)

Figure 1-1 CoreBuilder 5000 Ethernet 20-Port and 40-Port Module

CoreBuilder 5000 Ethernet 20/40-Port Module Benefits 1-5

20-Port Sample

Module Application

This section describes a sample application for the 20-Port module.

Attaching either CoreBuilder 5000 Ethernet 10BASE-T Module directly to the hub using an RJ-45 cable provides the following connections:

■ 20-Port Module – Provides 20 twisted pair ports

■ 40-Port Module – Provides 40 twisted pair ports

You can attach the CoreBuilder 5000 Ethernet 20-Port 10BASE-T Module using an RJ-45 cable directly to the hub which provides connections for the 20 twisted pair ports. The CoreBuilder 5000 Ethernet 40-Port 10BASE-T Module has the same application except the 40-Port module offers an additional 20 ports and occupies a second slot.

20-Port module

CoreBuilder 5000 hub

RJ-45 cables

Figure 1-2 Typical 20-Port Module Application

1-6 INTRODUCTION

Theory of Operation

Where to Go From Here

The CoreBuilder 5000 Ethernet 10BASE-T 20/40-Port Module offers a solution for customers utilizing RJ-45 connectors in their 10BASE-T installation.

Both modules offer:

■ Per-port switching connectivity for STP and UTP 10BASE-T networks

■ Support for network monitoring and private line cards

■ Easy configuration using the CoreBuilder 5000 Manager

■ 20 or 40 twisted pair Ethernet ports which you can switch

individually to any of the 8 CoreBuilder 5000 backplane channels or 8 extended segments in any combination of 8

Once you are familiar with the CoreBuilder 5000 Ethernet 20/40-Port 10BASE-T Module, evaluate the environment in which you plan to use the module and go to Chapter 2. Chapter 2, Designing and Expanding the Network, describes cabling considerations and configuration examples specific to the 20/40-Port module in the CoreBuilder 5000 hub.

DESIGNING AND EXPANDING THE

NETWORK

This chapter describes how to configure networks that use the CoreBuilder 5000 hub and the CoreBuilder 5000 Ethernet 20/40-Port 10BASE-T Module.

This chapter contains the following topics:

■ Understanding General Network Configuration Rules

■ Configuring Fiber Backbone, Twisted Pair to-the-Desk

■ Configuring Twisted Pair Backbone, Twisted Pair to-the-Desk

■ Using Patch Panels

■ Using Module Workgroups

■ Setting Redundant Links

■ Where to Go From Here

CAUTION: To ensure proper operation, install all equipment using only approved cables. Refer to Appendix A, Specifications, for information on twisted pair connector and cable requirements.

Understanding General Network Configuration Rules

This section describes general rules for configuring an Ethernet network using fiber as the backbone medium, and twisted pair as the horizontal medium. It also provides rules to ensure that your network configuration conforms to distance limitations imposed by Ethernet and networking equipment.

The following topics are discussed:

■ Before Configuring Your Network

■ Basic Network Rules

■ LAN Product Distances

2-2 DESIGNING AND EXPANDING THE NETWORK

Before Configuring

Before configuring your network, consider your:

Your Network

■ Network size from end-to-end. Is it:

■ 100 meters

■ 1000 meters

■ 4000 meters

■ Greater than 4000 meters

■ Plans for expansion. Once the network expands beyond a certain

size, you may need to add a switch or an additional internetworking device.

Basic Network Rules Table 2-1

■ The seven basic network rules to keep in mind when you construct

your network

■ 3Com recommendations for these rules

For hardware-specific information on the 20/40-Port module, refer to Appendix A, Specifications.

Table 2-1 Seven Basic Network Rules

lists:

Rule Definition Recommendations/Notes 1 If possible, use 10BASE-FB

as the backbone medium.

Use 62.5 micron cable to conform with IEEE 10BASE-F and ANSI FDDI standards.

Use ST-type connectors.

2 Wire the backbone in a star

topology for proper fault isolation.

Make sure to lay extra fiber cables. The extra cost is small and you need them as your network grows.

The star topology conforms to Ethernet and FDDI wiring. Ensure that you run at least two FDDI fiber strands to each backbone connection.

Understanding General Network Configuration Rules 2-3

Table 2-1 Seven Basic Network Rules (continued)

Rule Definition Recommendations/Notes 3 The maximum fiber Ethernet

network diameter is 4200 meters of fiber cable.

4 Certain LAN devices on the

network shrink the maximum Fiber Ethernet network diameter to less than 4200 meters.

5 Assume that 1 meter of

coaxial or twisted pair cable is equal to 1 meter of fiber cable.

6 The fiber link distances must

not exceed the limits imposed by the optical power budget.

7 When in doubt, use a switch

or bridge.

4200 meters is the maximum distance between any two transceivers on the network.

4200 meters does not include the transceiver cable (that is, drop or patch cable) that connects a device with an external transceiver. Transceiver cables can extend up to 50 meters. Thus, total network diameter can be as much as 4300 meters (4200 m + 2 * 50 m) between any two nodes.

Many LAN products delay the signal that travels through them. This is known as equivalent distance. Each microsecond delay:

Reduces the maximum link distance Shrinks the network diameter by

approximately 200 meters of fiber cable

Table 2-2

3Com products. A conservative rule. For example, the

actual equivalence is about 1.1 meters of coaxial for each meter of fiber. For simplicity, assume 1 meter.

For 62.5 micron cable, you can utilize up to 4000 meters point-to-point using the CoreBuilder 5000 or ONline fiber modules. If you have poor quality cable or cross several patch panels, you may have to sacrifice some distance in cable length.

Some older Ethernet fiber optic products are less powerful than CoreBuilder 5000 fiber module optics. If connecting to an Ethernet fiber optic product, remember that the least powerful device determines the maximum point-to-point distance.

If you are not certain if you have exceeded allowable network distances, use a bridge to extend the network.

lists Equivalent Distances for

2-4 DESIGNING AND EXPANDING THE NETWORK

LAN Product

Distances

When you configure your network, each product requires a different LAN equivalent distance. LAN equivalence is the sum of the incoming and outgoing module port signals. 3Com product modules have different LAN equivalent distances. Ta b le 2 -2

lists the LAN product

equivalent distances required for each LAN product.

Table 2-2 LAN Product Equivalent Distances

Equivalent

LAN Product

CoreBuilder 5000 and ONline Ethernet 10BASE-T Modules 585

Incoming signal to TP port 420 Outgoing signal from TP port 165

CoreBuilder 5000 and ONline Ethernet 10BASE-FB Modules 190

Incoming signal to fiber port 140 Outgoing signal from fiber port 50

ONline Ethernet FOIRL Module 560

Incoming signal to fiber port 330

Outgoing signal from fiber port 230 ONline Ethernet Transceiver Module 0 ORnet Star Coupler (8 or 14 port) 180 ONline Ethernet BNC Module 900

Incoming signal to BNC port 450

Outgoing signal from BNC port 450 ONline Ethernet Repeater Module 800

Incoming signal to AUI port 600

Outgoing signal from AUI port 200 IEEE Repeater 800

Distance (meters)

+ 60 hidden pages

3com CoreBuilder 5000 User Guide

Specifications and Main Features

Frequently Asked Questions

User Manual

CONTENTS

FIGURES

TABLES

HOW TO USE THIS GUIDE

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

Structure of This Guide

Document Conventions

Related Documents This section provides information on supporting documentation,

■ 3Com Documents

■ Reference Documents

INTRODUCTION

Theory of Operation

Where to Go From Here

Understanding General Network Configuration Rules

Basic Network Rules Table 2-1