3Com 980/000048/001 manual Additional Safety Information

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Additional Safety Information

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Additional Safety Information

See also the Important Safety Information at the front of this guide.

When using the unit, observe the following safety information:

Retain this user’s guide for later use and pass it on in the event of change of ownership of the unit.

Products manufactured by us are safe and without risk provided they are installed, used and maintained in good working order in accordance with our instructions and recommendations.

If any of the following conditions occur, isolate the electricity supply and refer to your 3Com reseller.

If the module is damaged.

If the module begins to make an odd noise, smell or smoke.

If the module shows signs of a distinct change in performance.

Never install telephone wires during a lightening storm, or install telephone connection sockets in wet locations, unless the socket is specifically designed for wet locations.

Do not touch uninstalled telephone wires or terminals unless the telephone line has been disconnected at the network interface. Always exercise caution when installing or modifying telephone lines.

Do not spill food or liquids on the unit. If the unit gets wet, isolate the electrical supply and contact your 3Com reseller.

Do not push any objects into the openings of the unit. Doing so can cause fire or electric shock by shorting out internal components.

Be sure nothing rests on the unit’s system cables and that the cables are not located where they can be stepped on and cause damage to the unit.

Keep the unit away from radiators and heat sources.

Install the unit in a clean area free from dust or extreme temperatures.

Interconnecting directly, or by way of other apparatus, to ports complying with SELV requirements may produce hazardous conditions on the network. Advice should be sought from a competent engineer before such a connection is made.

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Contents Accessbuilder Triple Modem Module User Guide 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Important Safety Information Wichtige Sicherheitshinweise ’INFORMATION DE Sécurité Importante Page Contents Modem Specification and Interface PIN Assignments Index Limited Warranty FCC Class a Verification Statement Page This table shows where to find specific information How to Use This GuideAbout this Guide IntroductionIcon conventions that are used throughout this guide are ConventionsText conventions used in this guide are Keep the unit away from radiators and heat sources Additional Safety InformationAbout this Guide Triple Modem Module Support for dial-up transmission protocols Principal FeaturesImplementation of V.32terbo Triple Modem Module Modem Connections To The Central Site Typical ApplicationsRegistering Ownership of your Triple Modem Module Pack Contents ChecklistPre-installation Requirements Triple Modem Module Overview Installation and OperationInstalling The Module Installing The Rear Card Installing the Rear CardExample of Installing a Front Card Installing the Front CardConnecting the Cables Front Panel LEDs Front Panel LEDs Installation and Operation Troubleshooting Guide TroubleshootingModem Health Modem DTE Connection Modem does not accept or echo back AT commandsModem Telephone Line Connection Troubleshooting Perform a local analogue loop test On-line Operation Dial Backup OperationPrivate-line Operation Transmitter / Receiver Specifications Modem SpecificationInterface PIN Assignments Autodial Autoanswer Protocols Physical DescriptionGeneral Approvals Requirements Approvals InformationAll the other apparatus shall comprise only Appendix a Modem Specification and Interface PIN Assignments Ringer Equivalence 21/V.11 DTE Port Pin Assignments24/V.28 35/V.36 Pstn Port Cable Pin Assignments Private Line Port Cable Pin Assignments 3Com Bulletin Board Service On-line Technical ServicesCall the telephone number nearest you World Wide Web SiteSupport from Your Network Supplier Support from 3Com Returning Products for Repair Appendix B Technical Support Numerics IndexSend LED Limited Warranty 408 764-5000 3/18/96 How to Identify and Resolve Radio-TV Interference Problems