3Com DIGITAL MODEM User Manual

Contents

2-14 CHAPTER 2: INSTALLING AND CONFIGURING THE DIGITAL MODEMYou should have received this SPID from your telephonecompany.CAUTION: If the ISDN line has been configured with only onetelephone number (Point-to-Point), do not include the SPID.5 Specify which device should receive the calls coming toPhone Number 1.You can select Phone Port or Internal Fax/Modem. If your modelhas the internal analog fax modem (Models 3C872 and 3C877),you can select both.If both boxes are checked, the internal analog fax modemand the phone will both ring, enabling you to answer usingeither device.6 If you have a second telephone number associated withyour ISDN telephone line (some telephone companiesrequire two), enter the number and corresponding SPID inthe Phone Number 2 and SPID Number 2 fields.7 Specify which device should receive the calls coming toPhone Number 2.8 Confirm that the parameters listed in steps 3 through 7are correct.9 Click the Update Configuration button to update thisinformation to the 3Com Impact digital modem.10 Reset the digital modem by turning the power switch offand then on again.If the parameters match those registered at the telephonecompany ISDN switch, the D channel LED lights for a fewminutes, flashes for several seconds, and then turns off. If theLED continues to flash or remains lit, see Chapter 3,“Troubleshooting.”11 Go to the section “Placing and Receiving Calls” to placeyour first call.