LAN Equivalence, LAN Product Equivalent Distances | 3Com 5124M-TPCL

LAN Equivalence

LAN equivalence is the sum of both the incoming and outgoing module port signals. Different modules, however, have different equivalent distances. Table 2-2 lists the LAN product equivalent distances.

Table 2-2. LAN Product Equivalent Distances

	LAN Product	Equivalent
	LAN Product	Distance (meters)
		Distance (meters)

	ONcore Ethernet 10-Port 10BASE-FB Module	190

	Incoming signal to fiber port	140

	Outgoing signal from fiber port	50

	ONcore Ethernet 10BASE-T Module	585

	Incoming signal to TP port	420

	Outgoing signal from TP port	165

	ONline Ethernet 10BASE-T Modules	585

	Incoming signal to TP port	420

	Outgoing signal from TP port	165

	ONline Ethernet Fiber or 10BASE-FB Modules	190

	Incoming signal to fiber port	140

	Outgoing signal from fiber port	50

	ONline Ethernet FOIRL Module	560

	Incoming signal to fiber port	330

	Outgoing signal from fiber port	230

	ONline Ethernet Transceiver Module	0

	ORnet Star Coupler (8 or 14 port) 26	180

2 - 6 ONline Ethernet 24-Port 10BASE-T Module Installation Guide

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3Com 5124M-TPCL manual LAN Equivalence, LAN Product Equivalent Distances, LAN Product Equivalent Distance meters

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 How to Use This Guide Audience Structure of This Guide Document Conventions Convention Indicates ExampleUsr/snm/agents Related Documents 3Com Documents Reference DocumentsPage Introduction Ethernet 24-Port 10BASE-T Module Description Module Features Model Number 5124M-TPCL Features Bank Switching Capability Model Number 5124M-TP Features Theory of Operation Typical 24-Port Module Configuration Page Designing and Expanding the Network Rules for Configuring a Network Understanding the General Rules Seven Basic Network Rules Rule Definition Recommendations/Notes Certain LAN devices Seven Basic Network Rules LAN Equivalence LAN Product Equivalent DistancesLAN Product Equivalent Distance meters Choosing a Network Backbone Cabling Structure LAN Product Equivalent Building a Network Star Configuration Star-Wiring Configuration Building a Network Serial Configuration Serial Configuration Port Module Configurations Fiber Backbone, 10BASE-T To-The-Desk Example Sample Configuration Distance Calculation 10BASE-T Backbone, 10BASE-T To-The-Desk Unshielded Twisted Pair Network Using 24-Port Modules Using Patch Panels Establishing Fault-Tolerant Configurations Setting Port Redundancy Setting Backbone Redundancy Redundant Twisted Pair Backbone Designing and Expanding the Network 2 Page Installing and Operating the Module Procedures for Completing Installation Precautionary ProceduresQuick Installation Step Procedure Section Title Establish connections from the 24-Port Unpacking Procedures Setting the DIP Switches DIP 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 Using 90 Cable Connectors Installing the Cable Tie-Wrap Kit Attaching 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 Enabling Link Integrity Selecting a Network Enabling Remote Diagnostics Mode Setting the Autopartition Threshold Value Saving Module Configurations Showing Module Configurations Show Module Show Port Telco Gathering Network Statistics Selecting the Per-Port Counters Connector Monitoring the Front Panel Shows the location of the LEDs on Model Number 5124M-TPCL Shows the location of the LEDs on Model Number 5124M-TP Port Module LED Interpretations LED Name Color State Indicates Using the LED Check Button Verifying LED and Network Assignments LED State Network Configuration Network Check CodesPage 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 Technical Assistance Troubleshooting Using the Port Activity LEDsTroubleshooting Using the Port Activity LEDs LED State Possible Cause Corrective Action Specifications Specification Value General SpecificationsTable A-1 -Port Module General Specifications Model Number 5124M-TP Power Specifications Table A-2 -Port Module Power SpecificationsPower Specifications Values Fuse Specifications for 24-Port Module Environmental SpecificationsTable A-3 -Port Module Fuse Specifications Table A-4 -Port Module Environmental Specifications Table A-5 -Port Module Mechanical Specifications Mechanical SpecificationsTwisted Pair Cable and Connector Specifications Mechanical 5124M-TPCL Values 5124M-TP Values Specifications IBM Type No. Twisted Pair Cable SpecificationsTable A-6. IBM Twisted Pair Cable Specifications Shielding Nominal Pairs Impedance Twisted Pair Connector Specifications RJ-45 Connector Pinouts Pin Connector Pinouts Figure A-1 -Port Module RJ-45 Connector Pinouts Figure 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 Technical Support On-line Technical Support Support from Your Network Supplier Email Technical SupportWorld Wide Web Site Support from 3Com Accessing the 3Com MIB Returning Products for Repair 3Com Technical Publications Page Index Activity LEDs, 3-29,3-31 VDE compliance