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Nortel Networks 5625HD UTP Cabling, 10BASE-T/100BASE-TX MDI Ports and MDI-X Ports

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Using the Model 5625HD EtherSpeed Switch Module

B-2 206208-A

UTP Cabling

A 10BASE-T/100BASE-TX connection between two ports requires two twisted

pairs. The transmit data (TD) pair carries data out from the port transmitter. The

receive data (RD) pa i r ca r r ies data to the port re ce ive r.

The 10BASE-T/100BASE-TX TD and RD circuits must be connected as follows:

• Individual conductors must provide pin-to-pin continuity (TD+ to RD+,TD-

to RD-, and so on) between the Model 5625HD switch module port and the

attached MDI port on a transceiver or other network interface.

• Each signal circuit must use a single twisted pair throughout the link.

• Standard Ethernet patch panels and cables provide the previous features.

10BASE-T/100BASE-TX MDI Ports and MDI-X Ports

In the 10BASE-T/100BASE-TX standard, MDI is the electrical and mechanical

interface specified for the 10BASE-T/100BASE-TX transceiver or network

interface card connector (for example, on the station at the end of a link). MDI

port pins 1 and2 carry the transmit (TD) signal, and pins 3and 6 carry the receive

(RD) signal as shown in FigureB-1.

Figure B-1. MDI-X Internal Crossover (RJ-45 Example)

MDI port network

interface card or

transceiver port

Host module MDI-X port

(transmit and receive

connections reversed)

1

2

3

6

Transmit

Receive

1

2

3

6

Receive

Transmit

Twisted pairs

2008EF

Contents

Main ii Copyright 1999 Nortel Networks Trademarks Statement of Conditions USA Requirements Only European Requirements Only Japan/Nippon Requirements Only Taiwan Requirements Canada Requirements Only Nortel Networks Software License Agreement iv Page Page Contents Page Page Page Figures Page Page Page Preface Before You Begin Related Publications Page How to Get Help Chapter 1 Overview of the Model 5625HD Switch Module Overview of the EtherSpeedII Switch Module Page Features of the Model 5625HD Switch Module Page Overview of the Model 5625HD Switch Module 206208-A 1-5 Physical Description Figure 1-2. Model 5625HD EtherSpeedII 24-Port Autonegotiating Switch Module Switch Configuration and Management Spanning Tree Protocol 802.1d Support Support for Virtual LANs Filtering Hot-Swapping Capability About the Model 500xBH/BHC Backplane 1-10 LEDs Port LEDs Figure 1-5. LEDs on the Model 5625HD Switch Module 10/100 Mb/s UTP Autonegotiation Ports 5625HD Page Connecting to Ethernet Hubs and Network Devices Network Configuration Examples 2-4 Figure 2-1. Network Example Giving a Server a Dedicated Port 2-6 Replacing a Bridge Figure 2-3. Replacing a Bridge Desktop Switch with ATM Uplinks 2-8 Figure 2-4. Desktop Switch with ATM Uplinks Segment Switch in an Enterprise Network Desktop Switch and Frame-to-Cell Converter Multi-Link Trunking Default Port Configuration Predefined SpeedView Configurations Chapter 3 Installing the Model 5625HD Switch Module Arranging Modules in a Model 500xBH/BHC Chassis Page Page Required Tools and Equipment Installing the Switch Module Page Checking LEDs Making 10/100 Mb/s Connections Connecting Terminals and Management Stations Page Checking the Module Connection to the Backplane Removing and Replacing the Switch Module Conditions for Replacing a Switch Module Removing a Switch Module Installing the Replacement Switch Module Reconfiguring the Replacement Switch Module Page Chapter 4 Troubleshooting Preliminary Steps Previous Module Configuration Incompatibility Model 5625HD Switch Module Startup Failure Port Connection Problems Page Page Appendix A Technical Specifications Using the Model 5625HD EtherSpeed Switch Module A-2 Technical Specifications Page Appendix B Cables and Connectors UTP Cable Length Limitations UTP Cabling 10BASE-T/100BASE-TX MDI Ports and MDI-X Ports Page B-4 UTP Cables and Connectors Figure B-3. 10BASE-T/100BASE-TX Ethernet UTP Crossover Cable TableB-1. 10BASE-T/100BASE-TX MDI-X Port Pin Assignments Using Category 5 Unshielded Twisted Pair Cables Using Shielded Twisted Pair Cables 206208-A C-1 Port LEDs Appendix C LEDs Figure C-1. LED Display for the Model 5625HD Switch Module 5625HD 10/100 Switch Host Port Status C-2 TableC-1. LEDs on the Model 5625HD Switch Module RJ-45 LEDs Page Index Numbers A B C D E F H I R S T U V