3Com 5108M-TP Environmental Specifications, Mechanical Specifications, General Specifications

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Environmental Specifications

Operating Temperature: 0° to 50° C (32° to 122° F)

Storage Temperature: -30° to 65° C (-22° to 149° F)

Humidity: less than 95%, non-condensing

BTU/hr: 30

Mechanical Specifications

Dimensions: 1.0" W x 10.25" L x 8.5" H (2.54 cm x 26.04 cm x 21.6 cm)

Weight: 1.25 lb. (0.57 kg.)

General Specifications

Data Rate: 10 Mbps (million bits per second)

Data modulation: Manchester

Diagnostic modulation: Link Integrity pulse

Collision detection: 100% deterministic

Maximum number of nodes: 1024

Configuration rules: supports IEEE 802.3 controllers and IEEE 802.3 repeaters

Jabber Protection: 6.5 milliseconds

Port Connectors: Shielded 8-pin modular telephone jack, compatible with an unshielded connector

Cabling: 22, 24, or 26 AWG unshielded or shielded twisted pair cable

Cable differential impedance: 85 ohms to 150 ohms over 1 to 16 MHz band

A - 2 ONline Ethernet 10BASE-T Module User’s Guide

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Contents ONline Ethernet 10BASE-T Module User’s Guide Ii ONline Ethernet 10BASE-T Module User’s Guide ONline Ethernet 10BASE-T Module User’s Guide Iv ONline Ethernet 10BASE-T Module User’s Guide Contents Installing and Operating the Module Figures Viii ONline Ethernet 10BASE-T Module User’s Guide Tables Page How to Use This Guide AudienceStructure of This Guide Document Conventions Convention Indicates ExampleUsr/snm/agents Related Documents 3Com Documents Reference DocumentsPage Introduction ONline Ethernet 10BASE-T ModuleIndicators BASE-T Module Faceplate and ONline System Concentrator Dip Switches Interpretation of the 10BASE-T Module LEDsLED Name Color State Indicates Dip Switch SW1 Port Status Dip Switch SW3 Crossover Mode, Channel Select, Squelch Dip Switch SW1 Settings and InterpretationsCrossover Mode Switch Dip Switch SW3 Settings for Switches 1Switch Function Factory Switch Setting Default Off Squelch Mode SwitchChannel Select Switch Settings Dip Switch SW3 Settings and Interpretations for Switches 2 Switch Channel SelectionRelated Features Dip Switch SW6 Settings and InterpretationsEnable LED State Channel Configuration Channel Check CodesPage Designing and ExpandingtheNetwork Understanding the General Rules Basic Network RulesSeven Basic Network Rules Rule Definition Recommendations/NotesCertain LAN devices Seven Basic Network Rules LAN Equivalence LAN Product Equivalent DistancesLAN Product Equivalent Distance meters Fiber Backbone, Twisted Pair To-The-Desk Fiber Backbone, Twisted Pair To-The-Desk Example Sample Configuration Distance Calculation Maximum Link Distance on Twisted Pair Unshielded Twisted Pair High Squelch Low SquelchShielded Twisted Pair High Squelch Low Squelch IBM Type Twisted Pair Backbone, Twisted Pair To-The-Desk Unshielded Twisted Pair NetworkRedundant Twisted Pair Configuration Redundant LinksPage Patch Panels Installing and Operating the Module Precautionary ProceduresUnpacking Procedures Installation ProceduresInstalling a 10BASE-T Module BASE-T Module Cable Connection Troubleshooting TroubleshootingTroubleshooting With the Status LEDs Troubleshooting With the Port Status LEDsTroubleshooting With the Port Status LEDs Troubleshooting With the Port Status LEDs Possible Problem Troubleshooting State Solutions Troubleshooting With the Activity LEDsTroubleshooting With the Port Activity LEDs LED NameTechnical Assistance ONline Ethernet 10BASE-T Module Specifications Electrical SpecificationsEnvironmental Specifications Mechanical SpecificationsGeneral Specifications Twisted Pair Connectors and Cables Twisted Pair ConnectorsFigure A-1. RJ45 Connector Pin-outs Twisted Pair CablesConnecting Twisted Pair Cables Page Technical Support On-line Technical SupportSupport from Your Network Supplier Email Technical SupportWorld Wide Web Site Support from 3Com Accessing the 3Com MIB Returning Products for Repair3Com Technical Publications Page Index MIB, B-4