Nortel Networks 207344-B manual Using Shielded Twisted Pair Cables

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Cables and Connectors

Using Shielded Twisted Pair Cables

Type 1 shielded twisted pair (STP) cabling also operates with 10BASE-T Ethernet and 100BASE-TX Fast Ethernet. Type 1 STP cable consists of tinned-copper braided shield surrounding two data-grade twisted pairs of #22 AWG solid copper conductors that have individual or S-shaped shields of aluminum-backed insulating tape or metallized Mylar foil.

Note: A balanced unbalanced (balun) media adapter is required when connecting 100-ohm RJ-45 100BASE-TX ports to a 150-ohm STP cable plant. This adapter provides impedance matching between UTP (100-ohm) and STP (150-ohm) cabling.

Type 1 cable generally is used between wiring closets or from the wiring closet patch panel to the work area wall outlet.

Type 1 cable generally is terminated with an IBM four-position data connector. Nortel Networks Fast Ethernet supports 100BASE-TX Fast Ethernet over STP media through the application of a specialized balun media adapter, also referred to as a Type 1 balun (Figure B-5). When adapting 150-ohm STP cable plants for Fast Ethernet applications, balun media adapters are required at both the hub and station ends of the STP cable plant. Media adapters (such as AMP part number 558421-1) are available that plug into the RJ-45 patch cable connectors, allowing the patch cable to connect with an IBM data connector. The media adapter and patch cable provide impedance matching between UTP (100-ohm) and STP (150-ohm) cabling.

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Figure B-5. Fast Ethernet Type 1 Balun Media Adapter

Note: For additional information about AMP Type 1 balun media adapters (part number 558421-1), contact your AMP reseller or distributor. The user should verify that the combination of the STP cable plant and the impedance- matching baluns meets the requirements of the applicable LAN standard.

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Contents Using the Centillion EtherSpeedII Switch Modules Statement of Conditions TrademarksUSA Requirements Only European 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 Spanning Tree Protocol 802.1d Support Tftp SupportSupport for Virtual LANs FilteringHot-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