3Com DIGITAL MODEM - page 21

2-4 CHAPTER 2: INSTALLING AND CONFIGURING THE DIGITAL MODEM

7Connect the RJ-45 (8-pin) connector end of the

RJ-45/RJ-11 ISDN cable to the RJ-45 connector labeled

Wall on the digital modem’s back panel.

See Figure 2-1 for the location of the RJ-45 connector on the

digital modem’s back panel.

8Connect the RJ-11 (6-pin) connector end of the

RJ-45/RJ-11 ISDN cable to the RJ-11 ISDN wall jack.

CAUTION: The 3Com Impact digital modem is designed

to operate with Basic Rate ISDN 2B1Q U Interface network

terminations. An internal Network Termination device

(NT1) is built into the digital modem. Do not connect the

3Com Impact digital modem ISDN port to a standard

analog telephone jack or to an external NT1 device. Make

sure that it is connected to the ISDN jack.

9Turn on the 3Com Impact digital modem by toggling the

power switch on the back panel to the On position.

See Figure 2-1 for the location of the power switch on the

digital modem’s back panel. The indicator LEDs on the front

panel (see Figure 2-2) ﬂash momentarily as the unit

undergoes a power-up self-test diagnostic.

10 Turn on the computer’s power switch.

11 Go to the section “Conﬁguration for IBM PC or

Compatible Computer” later in this chapter to conﬁgure

the 3Com Impact digital modem.

Installing the Digital Modem in an Apple Macintosh

Computer

To install the 3Com Impact digital modem model 3C875 or

3C877 in an Apple Macintosh computer:

1Turn off the computer.

2Ensure that the 3Com Impact digital modem power switch

is in the Off position.

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