Specifications

SIM900 AT Commands Set
SIM900_ATC_V1.01 196 23.06.2010
have been previously enabled for this
demonstration to work.
<incoming call sent busy
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
demonstration to work.
ATD6241xxxx;
<RX incoming call>
AT+CHLD=2
AT+CHLD=0
OK
+CCWA: "1391818
6089",129,1,""
OK
<incoming call actived,
original on hold>
OK
<incoming call actived,
current call
terminate>
10.5 SIM Toolkit Commands
Demonstration Syntax Expect Result
Select the 1
st
menu item: individual
assistance
AT*PSSTK="MENU
SELECTION",1
*PSSTK: "SELECT
ITEM",0,0,,0,0,1,0,0,5
Go to the menu of individual assistance
AT*PSSTK="GET
ITEM LIST",5
*PSSTK: "GET ITEM
LIST",1,1,2,5E2E52A9,0,0,0
*PSSTK: "GET ITEM
LIST",2,2,2,752862377BA174
06,0,0,0
*PSSTK: "GET ITEM
LIST",3,3,2,52067EC47BA17
406,0,0,0
*PSSTK: "GET ITEM
LIST",4,4,2,7FA453D16D886
06F,0,0,0
*PSSTK: "GET ITEM
LIST",5,5,2,65E57A0B63D09
192,0,0,0
OK
Select 1: help AT*PSSTK="SELECT
ITEM",1,1,0,0
*PSSTK:
"NOTIFICATION",1,19,1,2,5
3D190014FE1606F2026,0,0
Go back to main menu
AT*PSSTK="NOTIFIC
ATION",1,0
*PSSTK: "END SESSION"
10.6 Audio Commands
Demonstration Syntax Expect Result
DTMF tones AT+CLDTMF=2, OK