Radio link protocol parameters +crlp, Other radio link parameters +dopt – Multi-Tech Systems MMCModem GPRS (MTMMC-G) User Manual
Page 96

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