AT Commands Reference Manual - wireless netcontrol GmbH

Call Control
AT+CCWA?
+CCWA: 1
OK
Examples of +CCWA set command - network interrogation
AT+CCWA=0,2
// query when all class CW feature is disabled
+CCWA: 0,255
// query report - all classes are disabled
OK
AT+CCWA=1,2,2
//Class parameter is 2 - set call wait for all bearer services
OK
AT+CCWA=0,2
// query all classes
+CCWA: 1,16
// Data circuit sync enabled
+CCWA: 1,32
// Data circuit async enabled
OK
AT+CCWA=1,1
OK
//Enable the call waiting feature in the network, and in the H24
Example +CCWA indication
atd9311234567; //Originate a voice call
OK
OK
//Voice call connected
(...conversation...)
(… call waiting indication received by the H24 …)
+CCWA: "+358317654321",145,1,"Bob"
+CCWA: "+358317654321",145,1,"Bob"
AT+CHLD=0 //Release the waiting call
OK
NO CARRIER
AT+CRC=1
//RING indication is not relevant to CCWA indication
OK
(…waiting call…, caller restricted to its CLI presentation (used AT+CLIR)…)
+CCWA: "",128,1,"",1
//CLI is restricted, but call type recognized as voice
+CCWA: "",128,1,"",1
+CHLD, Call Related Supplementary Services Command
This command controls the Call Hold and Multiparty Conversation services. This command
manipulates voice calls only.
Set Command
The Set command allows the control of the following call related services:
• Call HOLD: A call can be temporarily disconnected from the H24, but the connection is
retained by the network.
• MTPY (Multi party) Conversation: Conference calls.
The network does not reserve more than one traffic channel for a mobile station, therefore the
H24 can have only one call on hold at a time.
Note: Only voice calls can be put on HOLD. A precondition for the multi-party service is that
the device is in control of one active call and one call on hold. In this situation, the device
can request the network to begin the MTPY (Multi Party) service. Once a MTPY call is
active, remote parties may be added, disconnected or separated (removed from the MTPY
call, but remain connected to the served mobile subscriber).The maximum number of
3-24 H24 - AT Commands Reference Manual April 15, 2010