3Com DIGITAL MODEM User Manual

Contents

2-6 CHAPTER 2: INSTALLING AND CONFIGURING THE DIGITAL MODEM9 Turn on the 3Com Impact digital modem by toggling thepower switch on the back panel to the On position.See Figure 2-1 for the location of the power switch on thedigital modem’s back panel. The indicator LEDs on the frontpanel (see Figure 2-2) flash momentarily as the unitundergoes a power-up self-test diagnostic.10 Turn on the computer’s power switch and restart.11 Go to the section “Configuration for Apple MacintoshComputer” later in this chapter to configure the 3ComImpact digital modem.Configuring the 3Com Impact Digital ModemThe 3Com Impact digital modem requires the five essentialconfiguration parameters below before it can operateproperly on an ISDN line. Before configuring the digitalmodem, make sure you have this information readilyavailable. These five parameters are provided to you at thetime of installation of your ISDN line by the telephonecompany installer.n ISDN Switch Typen Phone #1 (local directory telephone number)n SPID #1 (Service Profile Identifier)n Phone #2 (if required by the telephone company)n SPID #2 (if required by the telephone company)Each of these items is stored in special S registers within thedigital modem. These S registers are set by issuing ATSxx=commands to the digital modem. The Impact digital modemsoftware will automatically issue the AT commands to set theS registers as part of the configuration process.The following three sections describe how to configure the3Com Impact digital modem using the Windows, DOS, orMacintosh operating systems, respectively.