ISU AT Command Reference

ISU AT Command ReferenceInformative Examples13.4 Disconnecting a Data CallAT+CBST=6,0,1(asynchronous modem 4800 bps and IRLP)OKAT+CR=1(enable reporting)OKATD1234567890(dial remote modem)+CR: REL ASYNCCONNECT 9600 (call connected at DTE rate of 9600)< ... data transfer ... > (send escape sequence)OKATH0(hangup call)OK13.5 Originating and Disconnecting a Voice CallAn example of how to make and disconnect a voice call is given below:ATD1234567890;(dial remote phone)OK(call connected; phone stays in command mode)< ... conversation ... >ATH(hangup call)OK13.6 Coordination of +CLCC and +CPAS responsesIn order to determine the call state of the ISU, the +CLCC and +CPAS commands may be used. Thefollowing table demonstrates how the output of the two commands, as well as the Extended RingMessage, can be combined to provide a more detailed definition of the call state than any one of theresults provides by itself.Call State +CLCC Response +CPAS Response Extended Ring MessageIdle +CLCC: 006 +CPAS: 000 or 003 n/aHandset dialing - Voice +CLCC: 002 +CPAS: 000 or 003 n/aATD dialing - Voicecommand aborts call command aborts call n/aATD dialing - Datacommand aborts call command aborts call n/aAlerting after ATD dialing - Voice command aborts call command aborts call n/aAlerting after ATD dialing - Data command aborts call command aborts call n/aRinging - Voice +CLCC: 004 +CPAS: 003 CRING: VOICERinging - Data +CLCC: 004 +CPAS: 003 CRING: DATAIn call - Voice +CLCC: 000 +CPAS: 000 or 003 n/aIn call - Data +CLCC: 000 +CPAS: 004 n/aOn hold - Voice +CLCC: 001 +CPAS: 000 or 003 n/aCall waiting - Voice +CLCC: 005 +CPAS: 000 or 003 n/aVersion 2.6March 30, 2006 90