SMC Networks SMC6724L3 INT 1000BASE-T Cable Requirements, Adjusting Existing Category 5 Cabling

Page 60

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) or 6 cable should be used. The Category 5e and 6 specifications include 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: 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 or 6 cables.

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

3.Reconnect some of the connectors in the link.

B-6

Image 60

Contents TigerSwitch 10/100 Page TigerSwitch 10/100 Installation Guide Trademarks Limited Warranty SMC Networks, Inc Tesla Irvine, CA Compliances FCC Class aIndustry Canada Class a EC Conformance Declaration Class a Japan Vcci Class a Australia AS/NZS 3548 1995 Class a Safety Compliance Warnhinweis Faseroptikanschlüsse Optische SicherheitUnderwriters Laboratories Compliance Statement Wichtige Sicherheitshinweise Germany Viii Table of Contents Installing the Switch Making Network ConnectionsAppendices Table of Contents Chapter About Tigerswitch 10/100 OverviewSwitch Architecture SMC6724L3 Front and Rear PanelsManagement Options Description of Hardware RJ-45 PortsPorts Status LEDs Port Status LEDsSystem Status LEDs System Status LEDsOptional Media Extender Modules Optional 10/100/1000BASE-T Module SMC6824GTOptional 100BASE-FX Module SMC6824FSSC Optional 100BASE-FX Module SMC6824FMSC Optional 1000BASE-X Gbic Module SMC6824GBOptional Redundant Power Unit Power Supply ReceptacleFeatures and Benefits ConnectivityExpandability Performance ManagementAbout the Tigerswitch 10/100 Introduction to Switching Chapter Network PlanningApplication Examples Collapsed BackboneCentral Wiring Closet Central Wiring ClosetRemote Connection with Fiber Cable Remote Connection with Fiber CableMaking Vlan Connections Making Vlan ConnectionsUsing Layer 3 Routing IP Routing for Unicast TrafficConnectivity Rules Mbps Gigabit Ethernet Collision Domain10/100 Mbps Ethernet Collision Domain Application Notes Network Planning Installing the Switch Selecting a SiteEquipment Checklist Package ContentsOptional Rack-Mounting Equipment Mounting Rack MountingAttaching the Brackets Desktop or Shelf Mounting Attaching the Adhesive FeetInstalling an Optional Module into the Switch Installing an Optional ModuleInstalling a Gbic Transceiver Installing a Gbic TransceiverConnecting to a Power Source Power ReceptacleConnecting Network Devices Chapter Making Network ConnectionsTwisted-Pair Devices Cabling GuidelinesConnecting to PCs, Servers, Hubs and Switches Making Twisted-Pair ConnectionsTWISTED-PAIR Devices Wiring Closet Connections Wiring Closet ConnectionsFiber Optic Devices Making SC Port Connections Appendix a Troubleshooting Diagnosing Switch IndicatorsPower and Cooling Problems InstallationIn-Band Access Specifications Appendix B CablesTwisted-Pair Cable and Pin Assignments Fiber SMFFigure B-1. RJ-45 Connector Pin Numbers 10BASE-T/100BASE-TX Pin AssignmentsStraight-Through Wiring Crossover Wiring1000BASE-T Pin Assignments Cable Testing for Existing Category 5 Cable Adjusting Existing Category 5 Cabling1000BASE-T Cable Requirements Wiring Map for Serial Cable Console Port Pin AssignmentsCables Appendix C Specifications Physical CharacteristicsBase Unit Compliances Warranty Slide-in Modules100BASE-FX Extender Modules 1000BASE-T Extender Module Model1000BASE-X Gbic Module Specifications Appendix D Ordering Information Ordering Information Glossary 1000BASE-TAuto-Negotiation BandwidthCollision Collision DomainFast Ethernet Switch Fast EthernetFull Duplex Gigabit EthernetMedia Access Control MAC Ieee 802.3zLAN Segment Link SegmentRJ-45 Connector Switched PortsStraight-through Port Glossary-6 Index NumericsIndex-2 Index-3 Index-4 Page For Technical SUPPORT, Call