
AUDIO COMMANDS
181 AT Commands for EV-DO-EV3 Modems
RM Interface Setting +CRM
Set command changes the RM interface protocol.
Read command returns the RM interface setting, in the following format:
+CRM: <value>
Test command reports the <value> parameter range.
Syntax
Command Command type
AT+CRM=<value> Set
AT+CRM? Read
AT+CRM=? Test
Parameters and Values
<value> RM Interface protocol.
0 Circuit data.
1 Packet data (relay layer packet data).
2 Packet data (network layer packet data).
Notes
When the AT$QCMIP value is changed to “1” or “2”, it changes the value of AT+CRM to 2. When AT+CRM
has a value of “2”, it enables network mode operation.
Changing the value of AT$QCMIP to “0” will reset the AT+CRM to its original value.
Example
AT+CRM=?
+CRM: (0-2)
OK
AT+CRM?
+CRM: 2
OK
AT+CRM=0
ERROR
AT$QCMIP?
$QCMIP: 2
OK
AT$QCMIP=0
OK
AT+CRM=0
OK
AT+CRM?
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