Specifications

SIM900 AT Commands Set
SIM900_ATC_V1.01 149 23.06.2010
Reference Note
z Default value of <oldpwd> is “12345678”.
z If module is locked to a specific SIM card through +CLCK and
password lost or SIM state is PH-SIM PUK, you can use the super
password to unlock it.
z It is not supported temporarily.
6.2.40 AT+EXUNSOL Enable /Disable Proprietary Unsolicited Indications
AT+EXUNSOL Enable /Disable Proprietary Unsolicited Indications
Response
+EXUNSOL:(list of supported < exunsol>s)
OK
Test Command
AT+EXUNSOL
=?
Parameters
see Write Command
Response
OK
ERROR
Write Command
AT+EXUNSOL=
<exunsol>,<mod
e>
Parameters
<exunsol> string type(string should be included in quotation marks).
values currently reserved by the present document
“SQ” Signal Quality Report
Displays signal strength and channel bit error rate (similar
To AT+CSQ) in form +CSQN: <rssi>,<ber>when values change.
“FN” forbidden network available only
When returning to a non- registered state this indicates whether
All the available PLMNs are forbidden.
“MW” SMS Message waiting
On receiving an SMS (as indicated by the +CMTI indication) the
SMS is decoded and checked to see if it contains one or more of the
message waiting indications (i.e. voicemail, email, fax etc). If so, an
unsolicited indication is shown in the form for each message type:
+CMWT: <store>,<index>,<voice>,<fax>,<email>,<other>
Where <store> is the message store containing the SM, index is the
message index and <voice>,<email>,<fax>,<other> contain the
number of waiting messages (with ‘0’ defined as clear indication,
non-zero for one or more waiting messages) or blank for not
specified in this message.
“UR” Unsolicited result code
Produces an unsolicited indication following particular call state
Transitions. Multiple notifications may occur for the same transition
+CGURC: <event>