Specifications

SIM900 AT Command Manual
SIM900_AT Command Manual_V1.03 109 12/24/2010
supported <bm>s),(list of supported <ds>s),(list of supported <bfr>s)
OK
Parameters
See Write Command
Response
+CNMI: <mode>,<mt>,<bm>,<ds>,<bfr>
OK
Read Command
AT+CNMI?
Parameters
See Write Command
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
ERROR
Write Command
AT+CNMI=<mo
de>[,<mt>[,<bm
>[,<ds>[,<bfr>]]]
]
Parameters
<mode> 0 Buffer unsolicited result codes in the TA. If TA result
code buffer is full, indications can be buffered in some
other place or the oldest indications may be discarded
and replaced with the new received indications.
1 Discard indication and reject new received message
unsolicited result codes when TA-TE link is reserved
(e.g. in on-line data mode). Otherwise forward them
directly to the TE.
2 Buffer unsolicited result codes in the TA when TA-TE
link is reserved (e.g. in on-line data mode) and flush
them to the TE after reservation. Otherwise forward
them directly to the TE.
3 Forward unsolicited result codes directly to the TE.
TA-TE link specific inband technique used to embed
result codes and data when TA is in on-line data mode.
<mt> (the rules for storing received SMs depend on its data coding
scheme (refer GSM 03.38 [2]), preferred memory
storage (+CPMS) setting and this value):
0 No SMS-DELIVER indications are routed to the TE.
1 If SMS-DELIVER is stored into ME/TA, indication of
the memory location is routed to the TE using
unsolicited result code: +CMTI: <mem>,<index>
2 SMS-DELIVERs (except class 2) are routed directly to