3Com DIGITAL MODEM

3-6 CHAPTER 3: TROUBLESHOOTING

6Select the ﬁrmware ﬁle that you copied from 3Com’s

FTP site and click OK to start the download to the

3Com Impact digital modem.

The download will take several minutes.

7Click the Exit button to exit the utility.

For Macintosh Computers

This section provides instructions on downloading ﬁrmware

from your Macintosh to your digital modem.

1Obtain the latest ﬁrmware ﬁle from the 3Com FTP site

ftp.3Com.com.

2Copy the ﬁrmware ﬁle to your computer.

3Double-click the 3Com Impact icon to access the

Utility dialog box.

Use the Diagnostics button only under the direction of service

personnel.

4Click the Update Firmware button.

5Select the ﬁrmware ﬁle that you copied from 3Com’s

FTP site and click OK to start the download to the

3Com Impact digital modem.

A message box appears and allows you to conﬁrm the

download. The download will take several minutes.

6Click OK.

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