A3LA-R-MIL-MOD User Guide Version B
Document Number: 451-93156-001A
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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
<number>: quoted string type phone number of calling address in format specified by
<type>
<type>:
type of address octet in integer format (refer GSM 04.08 [7] subclause
10.5.4.7);default 145 when dialing string is international number,
otherwise 129.
If the network rejects a request to activate/deactivate the Call Waiting service due to
it not being provisioned (or for other reasons), the reported CME ERROR code will be
133 “requested service option not subscribed”. This is strictly speaking a GPRS-related
code (GSM 07.07 [2] subclause 9.2.2), but is the most informative choice in this case.
Informative examples:
The status of only the Voice class can be queried:
AT+CCWA=1,2,1
If the command is successful, the A3LA-R might return (after contacting the network):
+CCWA:1,1
If a remote caller tries to place a voice call to the A3LA-R while it already has a call in
progress, and the Call Waiting service has been made active for class Voice, then the
network will send a message to the A3LA-R. Then, if <n> has previously been set to
‘1’, the A3LA-R will send an unsolicited result code to the DTE, e.g.:
+CCWA:”+441223420024”,145,1