Specifications

SIM900 AT Commands Set
SIM900_ATC_V1.01 110 23.06.2010
Response
+CNMI: <mode>,<mt>,<bm>,<ds>,<bfr>
OK
Read Command
AT+CNMI?
Parameters
see Write Command
Write Command
AT+CNMI=<mo
de>[,<mt>[,<bm
>
[,<ds>[,<bfr>]]]]
Response
TA selects the procedure for how the receiving of new messages from the
network is indicated to the TE when TE is active, e.g. DTR signal is ON. If
TE is inactive (e.g. DTR signal is OFF), message receiving should be done
as specified in GSM 03.38.
OK
If error is related to ME functionality:
ERROR