Specifications

SIM900 AT Commands Set
SIM900_ATC_V1.01 150 23.06.2010
Where <event> describes the current call state:
<event>
0 Active call terminated, at least one held call remaining
1 Attempt to make an Mobile Originated call
2 Mobile Originated Call has failed for some reason
3 Mobile Originated call is ringing
4 Mobile Terminated call is queued (Call waiting)
5 Mobile Originated Call now connected
6 Mobile Originated or Mobile Terminated call has disconnected
7 Mobile Originated or Mobile Terminated call hung up
8 Mobile Originated call to non-emergency number in emergency
mode
9 Mobile Originated call no answer
10 Mobile Originated call remote number busy
“BC” Battery Charge
Displays battery connection status and battery charge level(similar
To AT+CBC) in form +CBCN:<bcs>,<bcl> when values change.
“BM” Band mode
Displays band mode (similar to AT+CBAND)in form +CBAND:
<band>when value changes.
“SM” Additional SMS Information
Displays additional information about SMS events in the form of
Unsolicited messages of the following format
+TSMSINFO: <CMS error info>
where <CMS error info> is a standard CMS error in the format
defined by the AT+CMEE command i.e. either a number or a
string.
“CC” Call information
Displays the disconnected call ID and the remain call numbers after
one of the call disconnected.
+CCINFO : <Call id Disconnected>,<Remain calls>
<mode>
0 disable
1 enable
2 query
Reference Note
Only “SQ” is supported currently.
6.2.41 AT+CGMSCLASS Change GPRS Multislot Class
AT+CGMSCLASS Change GPRS Multislot Class