Multi-Tech Systems GPRS (MTMMC-G) 사용자 설명서

Chapter 10 – Supplementary Services Commands  

Multi-Tech Systems, Inc. Wireless GSM/GPRS AT Commands (Document Number S000293I) 

82 

 

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 

 

0   Disable 
1   Enable  
2   Query status 

 

Type of address byte in integer format (refer to Rec GSM 04.08 [8] sub clause 10.5.4.7)  

1   Voice 
2   Data 
8   Short Messages 
7   All classes (voice, data) 

 A combination of different classes is 

not supported. It will only result in the activation / 

deactivation / status request for all classes (7).  

 

0   Not Active 
1   Active  

<alpha>: Optional string type alphanumeric representation of <number> corresponding to the entry 

found in the ADN or FDN phonebook. 

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) 

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