Specifications

Smart Machine Smart Decision
SIM900_AT Commands Manual_V1.07 241 2012.12.10
754 invalid SIM command
755 invalid File Id
756 missing required P1/2/3 parameter
757 invalid P1/2/3 parameter
758 missing required command data
759 invalid characters in command data
765 Invalid input value
766 Unsupported mode
767 Operation failed
768 Mux already running
769 Unable to get control
770 SIM network reject
771 Call setup in progress
772 SIM powered down
773 SIM file not present
12.3 Summary of Unsolicited Result Codes
URC Description AT Command
+CCWA:
<number>,<type>,<class>[,<a
lpha>]
Indication of a call that is currently
waiting and can be accepted. AT+CCWA=1
+CLIP:
<number>,<type>,<subaddr>,
<satype>,<alphaId>,<CLI
validity>
The calling line identity (CLI) of the
calling party when receiving a mobile
terminated call.
AT+ CL IP= 1
+CRING: <type>
Indicates incoming call to the TE if
extended format is enabled.
AT+CRC=1
+CREG: <stat>[,<lac>,<ci>]
There is a change in the MT network
registration status or a change of the
network cell.
AT+CREG=<n>
+CCWV
Shortly before the ACM (Accumulated
Call Meter) maximum value is reached.
The warning is issued approximately
when 5 seconds call time remains. It is
also issued when starting a call if less
than 5 s call time remains.
AT+CCWE=1
+CMTI: <mem3>,<index>
Indicates that new message has been
received.
AT+ CN MI
<mt>=1
+CMT:
Indicates that new message has been AT+CNMI