Specifications

Smart Machine Smart Decision
SIM900_AT Commands Manual_V1.07 79 2012.12.10
OK
Parameters
See Write Command
Response
TA returns current settings for RLP version. RLP versions 0 and 1 share
the same parameter set. TA returns only one line for this set (where
<verx> is not present).
+CRLP: <iws>,<mws>,<T1>,<N2>,<ver1>,<T4>
OK
Read Command
AT+CRLP?
Parameters
See Write Command
Response
TA sets radio link protocol (RLP) parameters used when non-transparent
data calls are setup.
OK
Write Command
AT+CRLP=<iws
>[,<mws>[,<T1>[
,<N2>[,<ver>[,<T
4>]]]]]
Parameters
<iws> 0-61 Interworking window size (IWF to MS)
<mws> 0-61 Mobile window size(MS to IWF)
<T1> 44-255 Acknowledgment timer T1 in 10 ms units
<N2> 1-255 Retransmission attempts N2
<verx> 0 RLP version number
<T4> 7 Re-sequencing period in integer format, in units of 10 ms.
Reference
GSM 07.07 [13]
Note
3.2.34 AT+CRSM Restricted SIM Access
AT+CRSM Restricted SIM Access
Test Command
AT+CRSM=?
Response
OK
Response
+CRSM: <sw1>,<sw2> [,<response>]
OK
ERROR
If error is related to ME functionality:
+CME ERROR: <err>
Write Command
AT+CRSM=<Co
mmand>[,<fileId
>[,<P1>,<P2>,<P
3>[,<data>]]]
Parameters
<Command>
176 READ BINARY
178 READ RECORD