Multi-Tech Systems MMCModem GPRS (MTMMC-G) - Manual (Page 82)

Chapter 10 – Supplementary Services Commands
Multi-Tech Systems, Inc. Wireless GSM/GPRS AT Commands (Document Number S000293I) 82
Call Waiting +CCWA
Description: This command controls the call waiting supplementary service.
The product will send a +CCWA unsolicited result code when the call waiting service is enabled.
Values: <n>: result code presentation status in the TA
0 Disable
1 Enable
<mode>
0 Disable
1 Enable
2 Query status
<type>
0 Type of address byte in integer format (refer to Rec GSM 04.08 [8] sub clause 10.5.4.7)
<class>
1 Voice
2 Data
8 Short Messages
7 All classes (voice, data)
Note: A combination of different classes is not supported. It will only result in the activation /
deactivation / status request for all classes (7).
<status>
0 Not Active
1 Active
<alpha>: Optional string type alphanumeric representation of <number> corresponding to the entry
found in the ADN or FDN phonebook.
Syntax: Command Syntax: AT+CCWA=<n>, [ <mode> [, <class> ] ]
Response Syntax: (for <mode>=2 and command successful)
+CCWA: <status> [, <class1> [ <CR><LF>+CCWA: <status>, <class2> [ … ] ]
Unsolicited Result: +CCWA: <number>, <type>, <class> [ ,<alpha>] (when waiting service is
enabled)
Command Possible responses
AT+CCWA=1,1,1
Note: Enable call waiting for voice
calls OK
Note: Command valid
AT+CCWA=1,2
Note: Interrogate call waiting +CCWA:1,1
OK
Note: Call waiting active for voice calls
+CCWA:”0146290800”,145,1,”FREDDY”
Note: Number and name of the waiting voice call
or
+CCWA:”0146290800”,145,1,”8023459678FFFF” (UCS2 format)
AT+CCWA=1,0,7
Note: Erase call waiting OK
Note: Command valid
+CCWA:,,1
Note: voice call waiting (no number)
AT+CCWA? +CCWA: <n>
OK
AT+CCWA=? +CCWA: List of supported <n>
OK