Specifications

Chapter 16 – Extended AT Commands in IS707.3
Multi-Tech Systems, Inc. CDMA AT Commands Reference Guide (PN S000294K) 116
U
m
Interface Data Compression Reporting +CDR
Description: The extended-format numeric parameter is used to control whether the extended-format +CDR: intermediate
result code is transmitted by the DCE. The result code is the same as for the TIA/EIS/IS-131 +DR:<result
code>.
Values: <val>
0 Disable reporting.
1 Enable reporting.
Syntax: Command syntax: AT+CDR=<val>
Command Possible Responses
AT+CDR?
Note: Display the current code
+CDR: 0
OK Note: Command is valid
AT+CDR=1
Note: Reporting enabled
OK
Note: Command valid
AT+CDR=?
Note: Display the range of code
+CDR: (0-1)
OK Note: Command is valid
U
m
Interface Data Compression +CDS
Description: This command is an overloaded command that serves as an unsolicited SMS command and also as a data
compression command (the unsolicited SMS command is explained in Chapter 21). This command has an
extended-format numeric parameter that is used to control the V.42bis data compression function on the U
m
interface. The command format is the same as for the TIA/EIS/IS-131 +DS command.
Syntax: Command syntax: AT+CDS=<Val>
Command Possible Responses
AT+CDS?
Note: Display the current setting.
+CDS: 0, 1, 2048, 6
OK Note: Command is valid
AT+CDS=0,1,1024,10
Note: Set the data compression.
OK
Note: Specified values beyond the initial
one are validated but ignored.
AT+CDS=?
Note: Display the range of setting.
+CDS: (0-0),(1-1),(512-65535),(6-250)
OK Note: Command is valid
Note: Currently, modem accepts only 0 as a valid setting.
Set Rm Interface Protocol +CRM
Description: The numeric parameter is used for set the Rm interface protocol. The Rm interface protocol value is effected
by the current $QCMIP setting. The Rm interface protocol can be set by the +CRM command only if
$QCMIP is set to zero (Mobile IP disabled, Single IP only).
Values: <Val>
0 Asynchronous Data
1 Packet data service, Relay Layer Rm interface
2 Packet data service, Network Layer Rm interface, PPP
Note: The values 3 and 4 are currently not supported.
3 Packet data service, Network Layer Rm interface, SLIP
4 STU-III Service
Syntax: Command syntax: AT+CRM=<Val>
Command Possible Responses
AT+CRM?
Note: Display the current setting.
+CRM: 0
OK
Note: Command is valid
AT+CRM=?
Note: Display the range of setting.
+CRM: (0-2)
OK
Note: Command is valid
AT+CRM=1
Note: Set to 1.
OK
Note: Command is valid
Note: This default value for the +CRM parameter shall be 0 if this value is supported by the DCE.