NAL Research Corporation (TN2012-02-V1.0)
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Note:
While this command is implemented in the A3LA-RS, it may not yet be supported in the
Iridium network. Stand by for an Iridium Technical Bulletin announcing network support for this
feature.
This command is based on GSM 07.07 [2] subclause 7.11, and allows control of the Iridium Call
Waiting supplementary service similar to GSM 02.83 [6]. Activation, deactivation and status
query are supported. Parameter <n> is used to disable/enable the presentation of the
unsolicited result code to the DTE when the Call Waiting service is enabled.
Command is abortable in the cases when the network is interrogated. The interaction of this
command with other commands based on other GSM supplementary services is described in the
GSM standard.
Defined values
<n> (sets/shows the result code presentation status in the A3LA-RS):
0
disable unsolicited result presentation
1
enable unsolicited result presentation
On a DTE-DCE command, <n> will set the result code presentation status in the A3LA-RS,
regardless of the value of any <mode> parameter.
<mode> (when <mode> parameter is not given, network is not interrogated):
0
disable Call Waiting service for specified class(es)
1
enable Call Waiting service for specified class(es)
2
query status of Call Waiting service for specified class(es)
<classx> is a sum of integers each representing a class of information:
1
voice
2
data
4
fax
This parameter defaults to 7, equal to all classes, but the A3LA-R/RM/RGS only supports
Voice Call Waiting so this is illegal. Therefore in practice the DTE must supply <classx>=1.
<status>:
0
Call Waiting service not active for specified Class
1
Call Waiting service active for specified Class
line, <class1> = 1)
When <mode> not 2 and command successful
None
+CCWA?
Current unsolicited result presentation status
+CCWA:<n>
Test command
+CCWA=?
List of supported <n>s
+CCWA:(0,1)
None
Unsolicited result notifying that a call is waiting
+CCWA:<number>,<type>,<class>