3Com DIGITAL MODEM manual Placing Calls Using the Phone Out Port

2-18 CHAPTER 2: INSTALLING AND CONFIGURING THE DIGITAL MODEM

CAUTION: The 3Com Impact digital modem is designed to operate with telephones that are compatible with the original AT&T 2500 touch-tone telephone standard. 3Com guarantees proper operation of up to three compatible touch-tone devices on the Phone Out port.The digital modem is designed to provide power and ringing for these three devices on up to 100 feet of AWG 26 or heavier AWG wiring. Although the digital modem may function satisfactorily at longer cable distances with more than two attached telephones, proper operation at longer cable distances is not guaranteed in all situations.

Specialized telephone equipment, most notably speaker phones that draw significantly larger amounts of power, may not work at all on the digital modem’s Phone Out port. These devices do not conform to the loop current (power) specification of the 2500 touch-tone telephone standard, and their operation is not guaranteed.

Placing Calls Using the Phone Out Port

To place an outgoing call, simply take the telephone handset or external fax machine off the hook, wait for a dial tone, and dial the destination telephone number.

Receiving Calls Using the Phone Out Port

lncoming calls to the telephone number assigned to the Phone Out port ring at the Phone Out port unless you are busy on another Phone Out port call. If the port is busy, the incoming call is automatically disconnected.

If you have a digital modem with an internal analog fax modem (models 3C872 and 3C877) you can have calls routed to the internal analog fax modem when the Phone Out port is busy. To do this, the digital modem must be configured to allow a call to be routed to both the Phone Out port and the internal analog fax modem, as described in the section “Configuring the 3Com Impact Digital Modem.”