Specifications

SIM900 AT Command Manual
SIM900_AT Command Manual_V1.03 95 12/24/2010
2 cancel session (not applicable to read Command response)
<str> string type(string should be included in quotation marks)
USSD-string
<dcs> Cell Broadcast Data Coding Scheme in integer format
(default 0)
Reference
GSM 03.38 [25]
Note
3.2.58 AT+CSSN Supplementary Services Notification
AT+CSSN Supplementary Services Notification
Response
+CSSN: (list of supported <n>s),(list of supported <m>s)
OK
Test Command
AT+CSSN=?
Parameters
See Write Command
Response
+CSSN: <n>,<m>
OK
Read Command
AT+CSSN?
Parameters
See Write Command
Response
OK
If error is related to ME functionality:
+CME ERROR: <err>
Write Command
AT+CSSN=<n>[,
<m>]
Parameters
<n> a numeric parameter which indicates whether to show the
+CSSI:<code1>[,<index>] result code presentation status
after a mobile originated call setup
0 disable
1 enable
<m> a numeric parameter which indicates whether to show the
+CSSU:<code2> result code presentation status during a
mobile terminated call setup or during a call, or when a
forward check supplementary service notification is received.
0 disable
1 enable
<code1> 0 unconditional call forwarding is active
1 some of the conditional call forwarding are active
2 call has been forwarded
3 call is waiting