Specifications

ISU AT Command Reference Informative Examples
Iridium Proprietary Version 2.45
20 June 2011 120
14.4 Disconnecting a Data Call
AT+CBST=6,0,1 (asynchronous modem 4800 bps and IRLP)
OK
AT+CR=1 (enable reporting)
OK
ATD1234567890 (dial remote modem)
+CR: REL ASYNC
CONNECT 9600 (call connected at DTE rate of 9600)
< ... data transfer ... >
<+++>
(send escape sequence)
OK
ATH0 (hangup call)
OK
14.5 Originating and Disconnecting a Voice Call
An 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)
OK
14.6 Coordination of +CLCC and +CPAS responses
In order to determine the call state of the ISU, the +CLCC and +CPAS commands may be used. The
following table demonstrates how the output of the two commands, as well as the Extended Ring
Message, can be combined to provide a more detailed definition of the call state than any one of the
results provides by itself.
Call State +CLCC Response +CPAS Response Extended Ring Message
Idle +CLCC: 006 +CPAS: 000 or 003 n/a
Handset dialing - Voice +CLCC: 002 +CPAS: 000 or 003 n/a
ATD dialing - Voice command aborts call command aborts call n/a
ATD dialing - Data command aborts call command aborts call n/a
Alerting after ATD dialing - Voice command aborts call command aborts call n/a
Alerting after ATD dialing - Data command aborts call command aborts call n/a
Ringing - Voice +CLCC: 004 +CPAS: 003 CRING: VOICE
Ringing - Data +CLCC: 004 +CPAS: 003 CRING: DATA
In call - Voice +CLCC: 000 +CPAS: 000 or 003 n/a
In call - Data +CLCC: 000 +CPAS: 004 n/a
On hold - Voice +CLCC: 001 +CPAS: 000 or 003 n/a
Call waiting - Voice 2 or more call states,
one of which is 004
e.g. +CLCC: 000,004
+CPAS: 000 or 003 n/a