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6
PLACING AND RECEIVING
CALLS
This chapter illustrates how to place and receive a variety of
calls with your 3C882 ISDN modem. The 3C882 ISDN
modem uses AT commands and S registers for call
management.
This chapter covers the following:
■ Placing ISDN data calls
■ Placing a Multilink PPP call
■ Placing a 56K TollSaver call
■ Receiving ISDN data calls
■ Placing calls using an analog phone port
■ Receiving calls using an analog phone port
Placing ISDN Data Calls
You can let your communications software send and receive
calls for you, or you can use a terminal emulator to place calls
manually. Software that communicates using AT commands
is required to control the 3C882 ISDN modem. You can enter
these codes manually. However, they are often entered
automatically by modem communications software.
When you place a call, the B channel LED(s) flash green, then
remain lit once the call is established. (If you are running
Multilink PPP, one B channel flashes and then remains lit.
Then, the second B channel flashes and then remains lit.)
For Macintosh users, add &DO to the modem initialization
string of your communications software.