MTD2000 AT Command Guide R12
Confidential
DAVISCOMMS (S) PTE LTD
84 /105
Example
Command
Response
AT$UM=0
Note: Disable RS232 interface.
OK
$UM?
Note: Query RS232 interface status via SMS or
TCP / UDP channel.
OK
$UM: 0
$UM=1
Note: Enable RS232 interface via SMS or TCP
channel.
OK