3Com DIGITAL MODEM C

CTECHNICAL SUPPORT

3Com provides easy access to technical support information

through the variety of services described in this appendix.

On-line Technical Services

3Com offers worldwide support, through the following:

■3Com Bulletin Board Service (3ComBBS)

■World Wide Web Site

■Ask3ComSM on CompuServeâ

■3ComFactsSM Automated Fax Service

3Com Bulletin Board Service

3ComBBS contains patches, software, and drivers for all 3Com

products, as well as technical articles. This service is available

via modem seven days a week, 24 hours a day. To reach the

service, set your modem to 8 data, no parity, and 1 stop bit.

Country Baud Rate Telephone Number

Australia up to 14400 baud (61) (2) 955 2073

France up to 14400 baud (33) (1) 69 86 69 54

Germany up to 9600 baud

up to 9600 baud

(49) (89) 627 32 188

(49) (89) 627 32 189

Hong Kong up to 14400 baud (852) 537 5601

Italy (fee required) up to 9600 baud (39) (2) 273 00680

Japan up to 14400 baud (81) (3) 3345 7266

Singapore up to 14400 baud (65) 534 5693

Taiwan up to 14400 baud (886) (2) 377 5838

(886) (2) 377 5840

U.K. up to 14400 baud (44) (144) 227 8278

U.S. up to 14400 baud

ISDN V.120

(1) (408) 980 8204

(1) (408) 654-2703

Contents

Main 3Com Corporation 95052-8145 Santa Clara, California 5400 Bayfront Plaza C ONTENTS 3 A C B F IGURES T ABLES A How to Use This Guide Introduction UIDE Conventions Table 1 and Table 2 list text and icon conventions that are used throughout this guide: I NTRODUCTION Page 3Com Impact Digital Modem Features Data Capabilities Voice Capabilities Simultaneous Data and Voice Capabilities Analog Modem Capabilities 3Com Impact Digital Modem Package Contents Standard Package Contents Additional Contents ISDN Digital Line Conguration Requirements Computer System Requirements IBM PC or Compatible Requirements Apple Macintosh Requirements Cabling Requirements 2 C THE DIGITAL MODEM Page Installing the 3Com Impact Digital Modem Installing the Digital Modem in an IBM-compatible PC Page Page Conguring the 3Com Impact Digital Modem Conguration for IBM PC or Compatible Computer Page Page Page Page Page Conguration for Apple Macintosh Computer Page Placing and Receiving Calls Placing ISDN Data Calls Multilink PPP Calls With Dynamic Bandwidth Allocation Page Placing Analog Modem Calls Using Communications Software to Place Calls Receiving Data Calls Using the Phone Out Port Placing Calls Using the Phone Out Port Receiving Calls Using the Phone Out Port Protocol Support Async-Sync PPP Conversion QuickSelect 3 Troubleshooting Tips Page Page Page Downloading Firmware to Your External Digital Modem Page A O Page B REGISTERS, AND RESULT C AT Command Set for the 3Com Impact Digital Modem Table B-1 summarizes the AT command set. Page Page AT Command Set for Internal Analog Fax Modem Table B-1 summarizes the AT command set for the internal analog modem. Page Page Remote S Registers Page Page Digital Modem Result Codes Table B-4 lists the 3Com Impact digital modem result codes. C On-line Technical Services 3Com Bulletin Board Service World Wide Web Site Ask3Com on CompuServe 3ComFacts Automated Fax Service Support from Your Network Supplier Support from 3Com Returning Products for Repair