Twisted Pair Cable Specifications, IBM Type No | 3Com 5124M-TPCL

Twisted Pair Cable Specifications

The cables that are supported must meet the following specifications:

❑22, 24, or 26 gauge twisted pair cable

❑80 to 150 ohm impedance

❑Minimum of 2 pairs

A pair is usually a solid color wire twisted with a striped wire of the same color.

Table A-6 lists the specifications for IBM cable types 1, 2, 6, and 9. These cable types are IEEE 802.5 compliant and are ETL (ETL Testing Laboratories) verified.

Table A-6. IBM Twisted Pair Cable Specifications

	IBM Type	No. of	AWG	Shielding	Nominal
	IBM Type	Pairs	AWG	Shielding	Impedance
		Pairs			Impedance

	1	2	22 (solid	Data pairs individually	150 ohms
	(non-plenum)		bare	foil shielded plus 65%
			copper)	tinned copper braid

	2	6	22 (solid	Data pairs individually	Data	150
	(non-plenum)	(data 2)	bare	foil shielded plus 65%	ohms
		(voice 4)	copper)	tinned copper braid.	Voice	105
				Voice pairs	ohms
				non-shielded*

	6	2	26 (7x34	Overall foil shielded	150 ohms
	(non-plenum)		bare	pairs plus 65% tinned
			copper)	copper braid

	9 (plenum)	2	26 (7x34	Individually foil	150 ohms
			bare	shielded plus 65%
			copper)	tinned copper braid

A - 6 ONline Ethernet 24-Port 10BASE-T Module Installation Guide

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3Com 5124M-TPCL manual Table A-6. IBM Twisted Pair Cable Specifications, IBM Type No, Shielding Nominal Pairs Impedance

Contents

ONline Ethernet 24-Port 10BASE-T Module Installation Guide VDE Class B Compliance Restricted Rights Page Contents Installing and Operating the Module Troubleshooting Page Figures ONline Ethernet 24-Port 10BASE-T Module Installation Guide Tables Page How to Use This Guide Audience Structure of This Guide Usr/snm/agents Document ConventionsConvention Indicates Example Related Documents 3Com Documents Reference DocumentsPage Introduction Ethernet 24-Port 10BASE-T Module Description Module Features Model Number 5124M-TPCL Features Bank Switching Capability Model Number 5124M-TP Features Theory of Operation Typical 24-Port Module Configuration Page Designing and Expanding the Network Rules for Configuring a Network Understanding the General Rules Seven Basic Network Rules Rule Definition Recommendations/Notes Certain LAN devices Seven Basic Network Rules LAN Product Equivalent Distance meters LAN EquivalenceLAN Product Equivalent Distances Choosing a Network Backbone Cabling Structure LAN Product Equivalent Building a Network Star Configuration Star-Wiring Configuration Building a Network Serial Configuration Serial Configuration Port Module Configurations Fiber Backbone, 10BASE-T To-The-Desk Example Sample Configuration Distance Calculation 10BASE-T Backbone, 10BASE-T To-The-Desk Unshielded Twisted Pair Network Using 24-Port Modules Using Patch Panels Establishing Fault-Tolerant Configurations Setting Port Redundancy Setting Backbone Redundancy Redundant Twisted Pair Backbone Designing and Expanding the Network 2 Page Installing and Operating the Module Procedures for Completing Installation Precautionary ProceduresQuick Installation Step Procedure Section Title Establish connections from the 24-Port Unpacking Procedures Setting the DIP Switches DIP Switch Overview Model 5124M-TPCL and Model 5124M-TP DIP Switch Location DIP Switch Description Default DIP Switch SettingsLabel Function Factory DIP Switch Setting Network Selection Channel Network Select DIP Switch SettingsDIP Switch Setting Conn Installing the Module Installing a 24-Port Module Model Number 5124M-TPCL Port Module Cable Connection Model Number 5124M-TPCL Using 90 Cable Connectors Installing the Cable Tie-Wrap Kit Attaching the Tie-Wrap Bracket to the Module Securing 90 Cables to the Module Attaching Cables With 90 Connectors Configuration in a Managed Environment If Management is Not Available Enabling Port Redundancy Before Configuring the ModuleEnabling Ports Enabling Link Integrity Selecting a Network Enabling Remote Diagnostics Mode Setting the Autopartition Threshold Value Saving Module Configurations Showing Module Configurations Show Module Show Port Telco Gathering Network Statistics Selecting the Per-Port Counters Connector Monitoring the Front Panel Shows the location of the LEDs on Model Number 5124M-TPCL Shows the location of the LEDs on Model Number 5124M-TP Port Module LED Interpretations LED Name Color State Indicates Using the LED Check Button Verifying LED and Network Assignments LED State Network Configuration Network Check CodesPage Troubleshooting LED State Indication Possible Cause Corrective Action Troubleshooting Using the Port Status LEDsTroubleshooting Using the Port Status LEDs Troubleshooting Using the Port Status LEDs Technical Assistance Troubleshooting Using the Port Activity LEDsTroubleshooting Using the Port Activity LEDs LED State Possible Cause Corrective Action Specifications Specification Value General SpecificationsTable A-1 -Port Module General Specifications Model Number 5124M-TP Power Specifications Values Power SpecificationsTable A-2 -Port Module Power Specifications Fuse Specifications for 24-Port Module Environmental SpecificationsTable A-3 -Port Module Fuse Specifications Table A-4 -Port Module Environmental Specifications Table A-5 -Port Module Mechanical Specifications Mechanical SpecificationsTwisted Pair Cable and Connector Specifications Mechanical 5124M-TPCL Values 5124M-TP Values Specifications IBM Type No. Twisted Pair Cable SpecificationsTable A-6. IBM Twisted Pair Cable Specifications Shielding Nominal Pairs Impedance Twisted Pair Connector Specifications RJ-45 Connector Pinouts Pin Connector Pinouts Figure A-1 -Port Module RJ-45 Connector Pinouts Figure A-2 -Pin Male and Female Connectors Table A-7 -Pin Cable Pinouts and Port Assignments Port TX, + RX, + Not Used Connecting Twisted Pair Cables Technical Support On-line Technical Support World Wide Web Site Support from Your Network SupplierEmail Technical Support Support from 3Com Accessing the 3Com MIB Returning Products for Repair 3Com Technical Publications Page Index Activity LEDs, 3-29,3-31 VDE compliance