Data Sheet

SIM900 AT Commands Set
SIM900R01_ATC_V1.00 51 15.01.2010
4 all call forwarding
5 all conditional call forwarding
<mode>
0 disable
1 enable
2 query status
3 registration
4 erasure
<number> string type (Phone number of forwarding address in format
specified by <type>)
<type> Type of address
<subaddr> string type (subaddress of format specified by <satype>)
<satype> type of sub-address in integer
<class> 1 voice (telephony)
2 Data (refers to all bearer services; with <mode>=2 this may
refer only to some bearer service if TA does not support
values 16, 32, 64 and 128)
4
Fax (facsimile services)
7 all classes
<time> 1..30 When "no reply" is enabled or queried, this gives the time in
seconds to wait before call is forwarded, default value is 20.
<status>
0 - not active
1 - active
Reference Note
GSM07.07
3.2.6 AT+CCWA Call Waiting Control
AT+CCWA Call Waiting Control
Read Command Response
AT+CCWA? +CCWA: <n>
OK
Test Command Response
+CCWA: (list of supported <n>s)
AT+CCWA=?