Nortel Networks 207344-B manual Appendix B Cables and Connectors, UTP Cable Length Limitations

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Appendix B

Cables and Connectors

This appendix provides general information about 10BASE-T and 100BASE-TX cabling and connections.

UTP Cable Length Limitations

All 10BASE-T/100BASE-T ports on EtherSpeedII switch modules support the maximum lengths for twisted pair cable that are specified in the IEEE 802.3 10BASE-T/100BASE-TX Ethernet specification. This specification defines the maximum segment length in terms of the performance characteristics of the cable media, which can vary according to cable type. In most networks, cable runs are less than 100 meters (m) to ensure that data is not distorted or lost.

For UTP links of #24 AWG cable between a network interface (transceiver or 10BASE-T/100BASE-TX network interface card) and a hub or between hubs, these performance specifications are normally met by a cable run of 100 m (330 ft.) or less, including any patch cables and cross-connect cables. The 10BASE-T/100BASE-TX standard specifies this length as a design objective. The EtherSpeedII switch module is designed to support a maximum cable length of 100 m.

Your cable plant can contain Category 3 or 5 UTP cables, up to a maximum length of 100 m between the end station and the switch module. Use an appropriate patch cable to connect your cable to this module.

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Contents Using the Centillion EtherSpeedII Switch Modules European Requirements Only TrademarksStatement of Conditions USA Requirements OnlyCanada Requirements Only Japan/Nippon Requirements OnlyTaiwan Requirements Nortel Networks Software License Agreement 207344-B 207344-B Contents Chapter Troubleshooting 207344-B 207344-B Figures Xii Tables Xiv Before You Begin PrefaceHard-Copy Technical Manuals Related PublicationsTechnical Solutions Center Telephone Number How to Get HelpPage Overview of the Switch Modules Overview of the EtherSpeedII Switch ModulesEtherSpeedII Switch Modules in a Network Center Features of the Switch ModulesOverview of the EtherSpeedII Switch Modules EtherSpeedII 10/100BASE-T 20-Port Switch Module Physical Description of the Switch ModulesEtherSpeedII 100BASE-FX 16-Port Switch Module LEDs on the EtherSpeedII 10/100BASE-T Switch Module LED Displays on the Switch ModulesNetwork Management Applications and Features Switch Configuration and ManagementSnmp MIB Support Command Line InterfaceMCP Modules Filtering Tftp SupportSpanning Tree Protocol 802.1d Support Support for Virtual LANsHot-Swapping Capability 10/100 Mb/s Autonegotiation PortsEtherSpeedII 10/100BASE-T Switch Module Chapter Planning a Network with EtherSpeedII Switch ModulesEtherSpeedII 100BASE-FX Switch Module Network Configuration ExamplesNetwork Example After Giving a Server a Dedicated PortReplacing a Bridge Replacing a BridgeData Center ATM Router Desktop Switch with ATM UplinksData Center Segment Switch in an Enterprise NetworkWiring Closet Desktop Switch and Frame-to-Cell ConverterMultiLink Trunking Example MultiLink TrunkingFactory Default Settings for the 10/100BASE-T Switch Module Default Port ConfigurationATM Predefined SpeedView ConfigurationsPage Preparing for Installation Installing the EtherSpeedII Switch ModulesSafety Installing a Switch ModuleRemove the filler panel Slot Module Guides Seating the Module LED Display for the 10/100BASE-T switch module Checking LEDs on the Switch ModulesLED Display for the EtherSpeedII 100BASE-FX Switch Module Removing a Module Making 10/100 Mb/s Cable ConnectionsWait 45 seconds Reconfiguring the Replacement Switch Module Installing the Replacement Switch ModuleChapter Troubleshooting EtherSpeedII Switch Module Startup Failure From the Map window, choose Statistics Port Connection ProblemsFrom the Map window in SpeedView, choose Statistics Standards Appendix a Technical SpecificationsMemory Technical Specifications Page UTP Cable Length Limitations Appendix B Cables and Connectors10BASE-T/100BASE-TX MDI Ports and MDI-X Ports UTP CablingFigure B-2. MDI-X to MDI-X External Crossover RJ-45 Example Figure B-3 illustrates an MT-RJ connector Figure B-4 BASE-T/100BASE-TX Ethernet UTP Crossover Cable UTP Cables and ConnectorsUsing Category 5 Unshielded Twisted Pair Cables Figure B-5. Fast Ethernet Type 1 Balun Media Adapter Using Shielded Twisted Pair CablesPage Appendix C LED Displays on EtherSpeedII Switch Modules Label Color/Status Meaning LED Displays on the EtherSpeedII Switch Modules Table C-2. LEDs on the EtherSpeedII 100BASE-FX Switch Module Numbers IndexIndex-2 Index-3 Index-4