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5108M-TP manual
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Troubleshooting
Specs
Install
Channel Configuration
Connecting Twisted Pair Cables
Problem
To set redundancy between two 10BASE-T Modules, connect two links between the modules. The redundant link must be connected to a port on the same 10BASE-T Module as the primary link. Use a crossover adapter between each link unless you choose to uncross port 8 on one of the modules to make the connection. Refer to for information on using crossover mode. Then use the SET PORT slot.port MODE REDUNDANT slot.port command to specify which port is the primary link and which is the backup link
Unpacking Procedures
Default
Switch Setting
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Contents
Document Number Printed March Model Number 5108M-TP 3Com Corporation
ONline Ethernet 10BASE-T Module User’s Guide
118 Turnpike Road Southborough, MA U.S.A 508 FAX 508
VDE Class B Compliance
Federal Communications Commission Notice
Canadian Emissions Requirements
EN55022/CISPR22 Compliance
ONline Ethernet 10BASE-T Module User’s Guide
Restricted Rights
iv ONline Ethernet 10BASE-T Module User’s Guide
Chapter 1 - Introduction
Contents
How to Use This Guide
Chapter 2 - Designing and Expanding the Network
Appendix A - Specifications
Chapter 3 - Installing and Operating the Module
Chapter 4 - Troubleshooting
Appendix B - Technical Support
Figures
viii ONline Ethernet 10BASE-T Module User’s Guide
Tables
Page
How to Use This Guide
Audience
Structure of This Guide
Indicates
Document Conventions
Convention
Example
A Warning. A
Related Documents
A Caution. A
Warning Wear eye
3Com Documents
Reference Documents
Page
1 Introduction
The ONline Ethernet 10BASE-T Module
Indicators
Figure 1-1. 10BASE-T Module Faceplate and ONline System Concentrator
Introduction 1
Color
Dip Switches
LED Name
State
Dip Switch SW1 Port Status
Figure 1-2. 10BASE-T Module and Dip Switch Locations
Switch Setting
Dip Switch SW3 Crossover Mode, Channel Select, Squelch
Switch
Default
Switch
Crossover Mode Switch
Squelch Mode Switch
Switch Setting
Channel Select Switch Settings
1 - 8 ONline Ethernet 10BASE-T Module User’s Guide
Switch
Dip Switch SW6 Link Integrity
Channel Selection
Switch
Switch
Related Features
LED and Channel Verification
Switch Setting
LED State
Channel Configuration
The ONline Ethernet Network Management Module
Table 1-6. Channel Check Codes
1 - 12 ONline Ethernet 10BASE-T Module User’s Guide
2 Designing and ExpandingtheNetwork
Designing and Expanding the Network 2
Understanding the General Rules
Basic Network Rules
Recommendations/Notes
Rule
Definition
Table 2-1. Seven Basic Network Rules
Definition
Table 2-1. Seven Basic Network Rules Continued
Rule
Recommendations/Notes
Recommendations/Notes
Rule
Definition
The fiber link distances
Equivalent
LAN Equivalence
LAN Product
Distance meters
LAN Product
Fiber Backbone, Twisted Pair To-The-Desk
Table 2-2. LAN Product Equivalent Distances Continued
Equivalent
Fiber Backbone, Twisted Pair To-The-Desk Example
Figure 2-1. Sample Configuration Distance Calculation
22 .6mm
Cable Gauge
Supports Link Distances Up To
150m
Twisted Pair Backbone, Twisted Pair To-The-Desk
Figure 2-2. Unshielded Twisted Pair Network
Redundant Links
Figure 2-3. Redundant Twisted Pair Configuration
To set redundancy between two 10BASE-T Modules, connect two links between the modules. The redundant link must be connected to a port on the same 10BASE-T Module as the primary link. Use a crossover adapter between each link unless you choose to uncross port 8 on one of the modules to make the connection. Refer to Chapter 1 for information on using crossover mode. Then use the SET PORT slot.port MODE REDUNDANT slot.port command to specify which port is the primary link and which is the backup link
Patch Panels
2 - 14 ONline Ethernet 10BASE-T Module User’s Guide
3 Installing and Operating the Module
Precautionary Procedures
Unpacking Procedures
Installation Procedures
Figure 3-1. Installing a 10BASE-T Module
Figure 3-2. 10BASE-T Module Cable Connection
4 Troubleshooting
Troubleshooting
Problem
Troubleshooting With the Status LEDs
Troubleshooting
Indication
LED State
Troubleshooting
Problem
Indication
LED State
Troubleshooting
Problem
Indication
Solutions
Troubleshooting With the Activity LEDs
Possible Problem
Troubleshooting
Technical Assistance
ONline Ethernet 10BASE-T Module Specifications
A Specifications
Electrical Specifications
Mechanical Specifications
Environmental Specifications
General Specifications
Twisted Pair Connectors and Cables
Twisted Pair Connectors
Twisted Pair Cables
Figure A-1. RJ45 Connector Pin-outs
Connecting Twisted Pair Cables
Page
B Technical Support
On-line Technical Support
Email Technical Support
Support from Your Network Supplier
World Wide Web Site
Support from 3Com
Accessing the 3Com MIB
Returning Products for Repair
3Com Technical Publications
Page
Index
Numerics