7 P LACING AND RECEIVINGCALLSThis chapter illustrates how to place and receive a variety ofcalls with your 3C882 ISDN modem. The 3C882 ISDN modemuses AT commands and S registers for call management.This chapter covers the following:n Placing ISDN data callsn Placing a Multilink PPP calln Placing a TollMizer calln Receiving ISDN data callsn Placing calls using an analog phone portn Receiving calls using an analog phone portn ISDN Call LoggingPlacing ISDN Data CallsYou can let your communications software send and receivecalls for you, or you can use a terminal emulator to place callsmanually. Software that communicates using AT commands(such as HyperTerminal) is required to control the 3C882ISDN modem. You can choose to enter these codes manually;however they are often entered automatically by modemcommunications software.When you place a call, the B channel LED(s) flash green andthen remain lit once the call is established. (If you arerunning Multilink PPP, one B channel flashes and thenremains lit. Then the second B channel flashes and it tooremains lit.)For Macintosh users, add &DO to the modem initializationstring of your communications software.
