AT Commands F-35
AT Commands
$M
n Connection Security Password Control
$M0
The originating modem sends the Connection Security password; the answering
modem does not verify the Connection Security password.
$M1
The originating modem sends the Connection Security password; the answering
modem verifies the Connection Security password for all connections. If the
originator’s password does not match one of the answerer’s passwords, the connection
fails.
$M2
The originating modem sends the Connection Security password; the answering
modem verifies the Connection Security password for all connections. If the
originator’s password does not match one of the answerer’s passwords, the answerer
uses auto-logon string 5 to prompt the remote user (up to three times) for the
Connection Security password. If the Auto-Logon sequence fails, the connection fails.
)M
n Power Level Adjustment for Cellular Telephone Connections
)M0
For central site modems: Auto-adjustment (adjusts power level if remote modem is set
to )M1 ). Use for MNP Class 10 modems that will connect to both cellular telephone
and non-cellular telephone site modems.
)M1
For cell-side cellular modems: Forces adjustment of power level.
Adjusts the power levels during link negotiation for reliable connections to
accommodate signaling requirements of cellular telephone equipment.
*M Modify Remote Access Level
Initiates a request to move up from a Level 0 remote access session to a Level 1 remote
access session. With security enabled and a Level 1 password set, the modem prompts
for a valid password up to three times before granting Level 1 access. With security
disabled or enabled but a Level 1 password not set, the modem grants Level 1 access
on request without further prompting.
-M
n MNP Class Connection Messages
-M0
Disables MNP Class connection messages.
-M1
Enables MNP Class connection messages.
Determines whether MNP Class connection messages are displayed. The -M1 setting
overrides the \V command setting for long form connection result codes and the W
command for serial port connect messages.
When -M1 is set and an MNP connection established, the connect message is
CONNECT MNPn/x, where n equals the MNP Class (from 1 to 10) and x equals the
type of data compression used (V.42bis or MNP Class 5). If )M1 is set, the message is
CONNECT MNPn/y/x, where y equals CELLULAR. If the modems do not negotiate
compression, the message is CONNECT MNPn.
