UMTS/HSPA Module Series
WCDMA UGxx AT Commands Manual
WCDMA_UGxx_AT_Commands_Manual Confidential / Released 174 / 247
Parameter
Example
ATD10086; //Establish a call
OK
+CCWA: "02154450293",129,1 //Indication of a call that has been waiting
AT+CHLD=2 //Place the active call on hold and accept the waiting call as
the active call
OK
AT+CLCC
+CLCC: 1,0,1,0,0,"10086",129 //The first call on hold
+CLCC: 2,1,0,0,0,"02154450293",129 //The second call be active
OK
AT+CHLD=21 //Place the active call except call X=1 on hold
OK
AT+CLCC
+CLCC: 1,0,0,0,0,"10086",129 //The first call be active
+CLCC: 2,1,1,0,1,"02154450293",129 //The second call on hold
OK
AT+CHLD=3 //Add a held call to the active calls in order to set up a
conference (multiparty) call
OK
AT+CLCC
+CLCC: 1,0,0,0,1,"10086",129
+CLCC: 2,1,0,0,1,"02154450293",129
<n> 0 Terminate all held calls or UDUB (User Determined User Busy) for a waiting call. If
a call is waiting, terminate the waiting call. Otherwise, terminate all held calls (if
any)
1 Terminate all active calls (if any) and accept the other call (waiting call or held
call). It can terminate active call if there is only one call
1X Terminate the specific call number X
2 Place all active calls on hold (if any) and accept the other call (waiting call or held
call) as the active call
2X Place all active calls except call X on hold
3 Add the held call to the active calls
4 Connects the two calls and disconnects the subscriber from both calls (ECT)
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