Siemens M20 Terminal Technical Description page 62

Siemens Information and Communication Products
AT+CCWA Call waiting control
Test command Response
AT+CCWA=? +CCWA: (list of supported <n>s) OK
Parameter
see set command
Read command Response
AT_CCWA? +CCWA: <n> OK
Parameter
see set command
Execute command Response
AT+CC- TA controls the call waiting supplementary service. Activation, deactivation and status query are
WA=[<n>] [,<mo- supported. It should be possible to abort the command when network is interrogated.
de>[,<class>]]]
If <mode><>2 and command successful
OK
If <mode>=2 and command successful
+CCWA:<status>,<class1>[<CR><LF>+CCWA:<status>,<class2>[...]] OK
Note:
If error is related to ME functionality:
+CME ERROR: <err>
Parameter
<n>
<mode>
<class>
<status>
Unsolicited result code
An unsolicited result code is returned when "Call Waiting at the TA" (and Call Waiting) are enab-
led and the system attempts to terminate call setup during an established call:
+CCWA: <number>,<type>,<class>[,<alpha>]
Parameter
<number>
<type>
<alpha>
Reference Note
GSM 07.07 Function for Data Fax does not make sense
Version 8 dated 15.03.00
<status>=0 should be returned only if service is not active for any <class>.
0 disable presentation of unsolicited result code
1 enable presentation of unsolicited result code
when <mode> parameter not given, network is not interrogated
0 disable
1 enable
2 query status
is a sum of integers each representing a class of information
1 voice (telephony)
2 data (usually refers to all bearer services,
if<mode>=2, this may refer only to some bearer services)
4 fax
7 all classes
0 not active
1 enable
string type phone number of calling address in format specified by <type>
type of address octet in integer format; 145 when dialling string includes
international access code character "+", otherwise 129
optional string type alphanumeric representation of <number>
corresponding to the entry found in phonebook
AT command interface
A
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