Technical data

WMO2 G900 / G1800 / G1900
WCOM/GSM/WMO2/WMO2ATDOC Friday 21 May 1999
WAVECOM confidential © 62
4.7.4 Call waiting +CCWA
This command allows control of the call waiting supplementary service.
The module supports only one communication. If a call waiting call
happens, the module will disconnect it but with a +CCWA:
<TelNb>,<TonNpi> indication.
Command Syntax: AT+CCWA=<n>, [ <mode> [, <class> ] ]
Unsolicited message: +CCWA: <number>, <type> (for incoming call)
* <n>: Result code presentation status in the TA
0 Disable
1 Enable
* <mode>:
0 Disable
1 Enable
2 Query status
* <class>:
1 Voice
2 Data
4 Fax
8 Short Messages
7 All classes
The combination of different classes in not supported, it will only result in
the activation / deactivation / status request of all classes (7).
Application to GSM AT+CCWA=1,1,1 Enable call waiting for speech
GSM to application OK Command valid
Application to GSM AT+CCWA=1,2 Interrogate call waiting
GSM to application +CCWA:1,1
OK
Call waiting active for speech calls
Application to GSM +CCWA: "0146290800",145 Number of the incoming call while already in
communication
incoming call is disconnected without any
notification
Application to GSM AT+CCWA=1,0,7 erase call waiting for all classes
GSM to application OK command valid