SMC Networks manual 1000BASE-T Cable Requirements, Cable Testing for Existing Category 5 Cable

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CABLES

1000BASE-T Cable Requirements

All Category 5 UTP cables that are used for 100BASE-TX connections should also work for 1000BASE-T, providing that all four wire pairs are connected. However, it is recommended that for all critical connections, or any new cable installations, Category 5e (enhanced Category 5) cable should be used. The Category 5e specification includes test parameters that are only recommendations for Category 5. Therefore, the first step in preparing existing Category 5 cabling for running 1000BASE-T is a simple test of the cable installation to be sure that it complies with the IEEE 802.3ab standards.

Cable Testing for Existing Category 5 Cable

Installed Category 5 cabling must pass tests for Attenuation, Near-End Crosstalk (NEXT), and Far-End Crosstalk (FEXT). This cable testing information is specified in the ANSI/TIA/EIA-TSB-67 standard. Additionally, cables must also pass test parameters for Return Loss and Equal-Level Far-End Crosstalk (ELFEXT). These tests are specified in the ANSI/TIA/EIA-TSB-95 Bulletin, “The Additional Transmission Performance Guidelines for 100 Ohm 4-Pair Category 5 Cabling.”

Note that when testing your cable installation, be sure to include all patch cables between switches and end devices.

Adjusting Existing Category 5 Cabling

If your existing Category 5 installation does not meet one of the test parameters for 1000BASE-T, there are basically three measures that can be applied to try to correct the problem:

1.Replace any Category 5 patch cables with high-performance Category 5e cables.

2.Reduce the number of connectors used in the link.

3.Reconnect some of the connectors in the link.

B-4

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Contents TigerSwitch Page TigerSwitch Installation Guide Trademarks Limited Warranty Limited Warranty Compliances FCC Class aIndustry Canada Class a Japan Vcci Class aEC Conformance Declaration Class a Taiwan Bsmi Class a Australia AS/NZS 3548 1995 Class a IiiSafety Compliance Warnhinweis Faseroptikanschlüsse Optische SicherheitUnderwriters Laboratories Compliance Statement Wichtige Sicherheitshinweise Germany Compliances Table of Contents Troubleshooting A-1 Specifications C-1Making Network Connections Cables B-1Ordering Information D-1 Glossary Index Index-1 Table of Contents Chapter About Tigerswitch OverviewDescription of Hardware 1000BASE-T PortsGbic Slots Status LEDs Port and System LEDsNetwork Management Agent Spanning Tree Protocol VLANsOptional Redundant Power Unit Power Supply ReceptaclesMulticast Switching Traffic PriorityFeatures and Benefits ConnectivityPerformance Management Introduction to Switching Chapter Network PlanningSample Applications Backbone ConsolidationMaking Vlan Connections Making Vlan ConnectionsConnectivity Rules Mbps Gigabit Ethernet Collision DomainMaximum Fiber Optic Cable Distance for 1000BASE-SX Maximum Fiber Optic Cable Distance for 1000BASE-LXMaximum 100BASE-TX Network Diameter Using Repeaters Mbps Fast Ethernet Collision DomainSMC 3-2 Rule for Class II Repeaters SMC 2-1 Rule for Class I RepeatersApplication Notes Mbps Ethernet Collision DomainSMC 5-4-3 Rule Maximum Cable LengthInstalling the Switch Selecting a SiteEquipment Checklist Package ContentsOptional Rack-Mounting Equipment Mounting Rack MountingAttaching the Brackets Desktop or Shelf Mounting Attaching the Adhesive FeetInstalling a Gbic Transceiver Connecting to a Power Source Power ReceptacleInstalling the Switch Connecting Network Devices Chapter Making Network ConnectionsConnecting to 1000BASE-T Devices Connecting to an SC-Type Fiber Port Maximum 1000BASE-LX Gigabit Ethernet Cable Length Appendix a Troubleshooting Diagnosing Switch IndicatorsPower and Cooling Problems Installation In-Band AccessSpecifications Appendix B CablesTwisted-Pair Cable and Pin Assignments 1000BASE-T Pin AssignmentsPin MDI Signal Name MDI-X Signal Name Cable Testing for Existing Category 5 Cable Adjusting Existing Category 5 Cabling1000BASE-T Cable Requirements Console Port Pin Assignments DB-9 Port Pin AssignmentsConsole Port to 9-Pin COM Port on PC Console Port to 25-Pin DTE Port on PCAppendix C Specifications Physical CharacteristicsSwitch Features Management Features StandardsWarranty SafetyCompliances EmissionsAppendix D Ordering Information Ordering Information Glossary Glossary-11000BASE-T Auto-NegotiationGlossary-2 Glossary-3 Glossary-4 Glossary-5 Glossary-6 Glossary-7 Virtual LAN VlanGlossary-8 Index Index-1Index-2 Index-3 Index-4 Page For Technical SUPPORT, Call