3Com 5124M-TPCL manual Twisted Pair Connector Specifications, RJ-45 Connector Pinouts

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Note that the non-plenum type 1, 2, and 6 cables are insulated with polyethylene. The plenum type 9 cable is insulated with polyvinylchloride.

*Voice pairs in the IBM Type 2 cable cannot be used for Token Ring data transmission.

Twisted Pair Connector Specifications

The IEEE 802.3 10BASE-T standard for RJ-45 pinouts must be used, as described below. 10BASE-T uses only 2 of 4 pairs of wire: pins 1 & 2 and pins 3 & 6. If the pairs are not configured this way, the connection will not work properly.

Level 3 or higher cable should have the following pin pairings:

❑Pair 1 is pins 4 and 5 (not used)

❑Pair 2 is pins 3 and 6

❑Pair 3 is pins 1 and 2

❑Pair 4 is pins 7 and 8 (not used)

Refer to Figure A-1 for an example of the recommended TIA-568A standard pinouts for this connector and cable.

RJ-45 Connector Pinouts

Figure A-1 shows RJ-45 connector pin assignments for the 24-Port Module, Model Number 5124M-TP. This model uses MDI-X (crossed-over) wiring and only uses:

❑Pins 1 and 2 (station transmit) - 5124M-TP receive

❑Pins 3 and 6 (station receive) - 5124M-TP transmit

Specifications A - 7

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Contents ONline Ethernet 24-Port 10BASE-T Module Installation Guide VDE Class B Compliance Restricted Rights Page Contents Installing and Operating the Module Troubleshooting Page Figures ONline Ethernet 24-Port 10BASE-T Module Installation Guide Tables Page Audience How to Use This GuideStructure of This Guide Document Conventions Convention Indicates ExampleUsr/snm/agents Related Documents Reference Documents 3Com DocumentsPage Ethernet 24-Port 10BASE-T Module Description IntroductionModule Features Bank Switching Capability Model Number 5124M-TPCL FeaturesTheory of Operation Model Number 5124M-TP FeaturesTypical 24-Port Module Configuration Page Designing and Expanding the Network Understanding the General Rules Rules for Configuring a NetworkRule Definition Recommendations/Notes Seven Basic Network RulesCertain LAN devices Seven Basic Network Rules LAN Equivalence LAN Product Equivalent DistancesLAN Product Equivalent Distance meters LAN Product Equivalent Choosing a Network Backbone Cabling StructureStar-Wiring Configuration Building a Network Star ConfigurationSerial Configuration Building a Network Serial ConfigurationFiber Backbone, 10BASE-T To-The-Desk Port Module ConfigurationsExample Sample Configuration Distance Calculation 10BASE-T Backbone, 10BASE-T To-The-Desk Unshielded Twisted Pair Network Using 24-Port Modules Establishing Fault-Tolerant Configurations Using Patch PanelsSetting Backbone Redundancy Setting Port RedundancyRedundant Twisted Pair Backbone Designing and Expanding the Network 2 Page Installing and Operating the Module Step Procedure Section Title Precautionary ProceduresQuick Installation Procedures for Completing InstallationEstablish connections from the 24-Port Setting the DIP Switches Unpacking ProceduresDIP Switch Overview Model 5124M-TPCL and Model 5124M-TP DIP Switch Location DIP Switch Description DIP Switch Settings Label Function Factory DIP Switch SettingDefault Channel Network Select DIP Switch Settings DIP Switch Setting ConnNetwork Selection Installing the Module Installing a 24-Port Module Model Number 5124M-TPCL Port Module Cable Connection Model Number 5124M-TPCL Installing the Cable Tie-Wrap Kit Using 90 Cable ConnectorsAttaching the Tie-Wrap Bracket to the Module Securing 90 Cables to the Module Attaching Cables With 90 Connectors Configuration in a Managed Environment If Management is Not Available Before Configuring the Module Enabling PortsEnabling Port Redundancy Selecting a Network Enabling Link IntegrityEnabling Remote Diagnostics Mode Setting the Autopartition Threshold Value Showing Module Configurations Saving Module ConfigurationsShow Module Show Port Telco Gathering Network Statistics Selecting the Per-Port Counters Connector Shows the location of the LEDs on Model Number 5124M-TPCL Monitoring the Front PanelShows the location of the LEDs on Model Number 5124M-TP LED Name Color State Indicates Port Module LED InterpretationsVerifying LED and Network Assignments Using the LED Check ButtonNetwork Check Codes LED State Network ConfigurationPage Troubleshooting Troubleshooting Using the Port Status LEDs Troubleshooting Using the Port Status LEDsLED State Indication Possible Cause Corrective Action Troubleshooting Using the Port Status LEDs LED State Possible Cause Corrective Action Troubleshooting Using the Port Activity LEDsTroubleshooting Using the Port Activity LEDs Technical AssistanceSpecifications Model Number 5124M-TP General SpecificationsTable A-1 -Port Module General Specifications Specification ValuePower Specifications Table A-2 -Port Module Power SpecificationsPower Specifications Values Table A-4 -Port Module Environmental Specifications Environmental SpecificationsTable A-3 -Port Module Fuse Specifications Fuse Specifications for 24-Port ModuleMechanical 5124M-TPCL Values 5124M-TP Values Specifications Mechanical SpecificationsTwisted Pair Cable and Connector Specifications Table A-5 -Port Module Mechanical SpecificationsShielding Nominal Pairs Impedance Twisted Pair Cable SpecificationsTable A-6. IBM Twisted Pair Cable Specifications IBM Type No.RJ-45 Connector Pinouts Twisted Pair Connector SpecificationsFigure A-1 -Port Module RJ-45 Connector Pinouts Pin Connector PinoutsFigure A-2 -Pin Male and Female Connectors Table A-7 -Pin Cable Pinouts and Port Assignments Port TX, + RX, + Not Used Connecting Twisted Pair Cables On-line Technical Support Technical SupportSupport from Your Network Supplier Email Technical SupportWorld Wide Web Site Support from 3Com Returning Products for Repair Accessing the 3Com MIB3Com Technical Publications Page Index Activity LEDs, 3-29,3-31 VDE compliance