Data Sheet

Smart Machine Smart Decision
active calls. Held calls are not
automatically resumed when all other
calls are terminated. They need to be
made active using the AT+CHLD=2x
Command. Note call waiting must have
been previously enabled for this
418148",129,""
+CLCC:2,1,1,0,0, "139
18186089",129, ""
OK
<Note incoming call held
flag set>
demonstration to work. AT+CHLD=22 OK
<original call held, incoming
call active>
AT+CHLD=12 OK
<terminate incoming call>
<terminate original call>
AT+CHLD=11
Send busy status to incoming waiting
caller.
Establish a voice call from EVB, receive
an incoming call (incoming call accepts
waiting status), send ‘busy’ status to
ATD6241xxxx; OK
RING
<RX incoming call> +CCWA: "1391818
6089",129,1,""
OK
waiting mobile. Note call waiting must AT+CHLD=0 OK
have been previously enabled for this <incoming call sent busy
demonstration to work. msg, current call retained>
Drop all calls on hold.
Establish a voice call from EVB, receive
an incoming call (incoming call accepts
waiting status), switch to incoming call
and drop all waiting calls.
Note call waiting must have been
previously enabled for this
ATD6241xxxx; OK
RING
<RX incoming call> +CCWA: "1391818
6089",129,1,""
AT+CHLD=2 OK
<incoming call actived,
original on hold>
demonstration to work. AT+CHLD=0 OK
<incoming call actived,
current call
terminate>
20.5 SIM Toolkit Commands
Please refer to SIM800 Series_STK_Application Note.DOC
20.6 Audio Commands
Demonstration Syntax Expect Result
DTMF tones AT+CLDTMF=2, OK
"1,2,3,4,5"
AT+CLDTMF=2,”A,B OK
SIM800 Series_AT Command Manual_V1.05 349 2014-07-31