Download Multi-Tech Systems GPRS (MTMMC-G) Network Router User Manual

Chapter 11 – Data Commands
Radio Link Protocol Parameters +CRLP
Description:
This command changes the radio link protocol parameters used for non transparent data transmission.
Values:
Value:
<iws>
<mws>
<T1>
<N2>
<ver>
0
1
Syntax:
Command syntax: AT+CRLP=<iws>,<mws>,<T1>,<N2>, <ver>
Range:
0-61
0-61
40-255
1-255
0-1
Command
AT+CRLP=?
Note: Test command
AT+CRLP=?
Note: Test command
AT+CRLP=61,61,48,6,0
Note: Set new parameters
AT+CRLP?
Note: Current values
Description:
Down window size, (default is 61)
Up window size, (default is 61)
Acknowledgement timer in units of 10ms, (default is 48)
Retransmission attempts, (default is 6)
Version number
V42bis is not supported
V42bis is supported
Possible responses
+CRLP: (0-61),(0-61),(40-255),(1,255),(0)
OK
Note: V42bis not supported
+CRLP: (0-61),(0-61),(40-255),(1,255),(0,1)
OK
Note: V42bis supported
OK
Note: Command valid
AT+CRLP: 61,61,48,6,0
Note: Command valid
Other Radio Link Parameters +DOPT
Description:
This command modifies some supplementary radio link protocol parameters.
Values:
<reset_allowed>
0
Data communication is hung up in case of bad radio link.
1
Default. Data communication continues in case of bad radio link (possible loss of data)
<dtx_allowed>
0
Normal mode
1
Default. Economic battery mode (not supported by all networks)
Syntax:
Command syntax: AT+DOPT=<reset_allowed>,<dtx_allowed>
Command
AT+DOPT=1
Note: Set new parameters (2nd value is the default)
AT+DOPT+?
Note: Test command
AT+DOPT=1,1
Note: Set new parameters
AT+DOPT?
Note: Current values
Possible responses
OK
Note: Command valid
(0,1),(0,1)
OK
Note: DTX is supported
OK
Note: Command valid
1,1
OK
Note: Command valid
Multi-Tech Systems, Inc. Wireless GSM/GPRS AT Commands (Document Number S000293I)
96