3Com 980/000048/001 manual World Wide Web Site, Call the telephone number nearest you

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B-2 APPENDIX B: TECHNICAL SUPPORT

Call the telephone number nearest you:

Country	Data Rate	Telephone Number
Australia	up to 14400 bps	(61)	(2)	9955 2073
France	up to 14400 bps	(33)	(1)	69 86 69 54
Germany	up to 9600 bps	(49) (89) 627 32 188 or (49) (89) 627 32
		189
Hong Kong	up to 14400 bps	(852) 2537 5608
Italy (fee required)	up to 14400 bps	(39)	(2)	273 00680
Japan	up to 14400 bps	(81)	(3)	3345 7266
Singapore	up to 14400 bps	(65)	534 5693
Taiwan	up to 14400 bps	(886) (2) 377 5838
U.K.	up to 28800 bps	(44)	(1442) 278278
U.S.	up to 28800 bps	(1) (408) 980 8204

Access by ISDN

ISDN users can dial-in to 3ComBBS using a digital modem for fast access up to 56 Kbps. To access 3ComBBS using ISDN, dial the following number:

(1) (408) 654-2703

World Wide Web Site

Access the latest networking information on 3Com’s World Wide Web site by entering our URL into your Internet browser:

http://www.3Com.com/

This service features news and information about 3Com products, customer service and support, 3Com’s latest news releases, selected articles from 3TECH™ (3Com’s award-winning technical journal) and more.

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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 About this Guide How to Use This GuideThis table shows where to find specific information IntroductionText conventions used in this guide are ConventionsIcon conventions that are used throughout this guide are Additional Safety Information Keep the unit away from radiators and heat sourcesAbout this Guide Triple Modem Module Principal Features Support for dial-up transmission protocolsImplementation of V.32terbo Triple Modem Module Typical Applications Modem Connections To The Central SitePack Contents Checklist Registering Ownership of your Triple Modem ModulePre-installation Requirements Triple Modem Module Installation and Operation OverviewInstalling The Module Installing the Rear Card Installing The Rear CardInstalling the Front Card Example of Installing a Front CardConnecting the Cables Front Panel LEDs Front Panel LEDs Installation and Operation Modem Health TroubleshootingTroubleshooting Guide Modem does not accept or echo back AT commands Modem DTE ConnectionModem Telephone Line Connection Troubleshooting Perform a local analogue loop test Private-line Operation Dial Backup OperationOn-line Operation Interface PIN Assignments Modem SpecificationTransmitter / Receiver Specifications Autodial Autoanswer Physical Description ProtocolsApprovals Information General Approvals RequirementsAll the other apparatus shall comprise only Appendix a Modem Specification and Interface PIN Assignments Ringer Equivalence DTE Port Pin Assignments 21/V.1124/V.28 35/V.36 Pstn Port Cable Pin Assignments Private Line Port Cable Pin Assignments On-line Technical Services 3Com Bulletin Board ServiceWorld Wide Web Site Call the telephone number nearest youSupport from Your Network Supplier Support from 3Com Returning Products for Repair Appendix B Technical Support Index NumericsSend LED Limited Warranty 408 764-5000 3/18/96 How to Identify and Resolve Radio-TV Interference Problems