3Com 5108M-TP manual Returning Products for Repair, Accessing the 3Com MIB

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For access to customer service for all 3Com products, call (800) 876-3266.

You can also contact the Integrated Systems Division (ISD) on the Internet by using the e-mail address techsupp@chipcom.com.

Returning Products for Repair

A product sent directly to 3Com for repair must first be assigned a Return Materials Authorization (RMA) number. A product sent to 3Com without an RMA number will be returned to the sender unopened, at the sender’s expense.

To obtain an RMA number for Integrated Systems Division products (formerly Chipcom), use the following numbers.

Country

Telephone Number

Fax Number

 

 

 

U.S. and Canada

(800) 724-2447

(508) 787-3400

Europe

(44) (1442) 275860

No Fax

Asia Pacific

(508) 787-5296

(508) 787-3400

 

 

 

Accessing the 3Com MIB

The 3Com Management Information Base (MIB) for the Integrated Systems Division describes commands that enable you to manage 3Com SNMP-based products. The MIB is available over the Internet on an anonymous FTP server. Updates to these MIBs are released as new 3Com products are introduced.

To access Internet versions:

1.FTP to ftp.chipcom.com (151.104.9.65).

2.Enter the login name anonymous.

B - 4 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 Usr/snm/agents Document ConventionsConvention Indicates Example Related Documents 3Com Documents Reference DocumentsPage Introduction ONline Ethernet 10BASE-T ModuleIndicators BASE-T Module Faceplate and ONline System Concentrator LED Name Color State Indicates Dip SwitchesInterpretation of the 10BASE-T Module LEDs 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 SelectionEnable Related FeaturesDip Switch SW6 Settings and Interpretations 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 Product Equivalent Distance meters LAN EquivalenceLAN Product Equivalent Distances Fiber Backbone, Twisted Pair To-The-Desk Fiber Backbone, Twisted Pair To-The-Desk Example Sample Configuration Distance Calculation Shielded Twisted Pair High Squelch Low Squelch IBM Type Maximum Link Distance on Twisted PairUnshielded Twisted Pair High Squelch Low Squelch 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 SpecificationsGeneral Specifications Environmental SpecificationsMechanical 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 SupportWorld Wide Web Site Support from Your Network SupplierEmail Technical Support Support from 3Com Accessing the 3Com MIB Returning Products for Repair3Com Technical Publications Page Index MIB, B-4