Multitech MultiAccess MA220, Руководство пользователя

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Appendix F – Modem AT Commands
58
Multi-Tech Systems, Inc. MultiAccess User Guide
Command: &L
n Leased Line Operation
Values: n = 0, 1, or 2
Defaults: 0
Description: &L0 The modem is set for standard dial-up operation.
&L1 The modem is set for leased line operation in originate mode.
&L2 The modem is set for leased line operation in answer mode.
Note: For &L1 and &L2 , there is a 30-second window between power up and the starting of
the leased line handshake. During this time, you can turn off the command, if desired.
Command: &P n Pulse Dial Make-to-Break Ratio Selection
Values: n = 0, 1, or 2
Default: 0
Description:
&P0 60/40 make-to-break ratio
&P1 67/33 make-to-break ratio
&P2 20 pulses per second
Note: The &P2 command is available only if the country/regional code is set to Japan.
Command: &Q n Asynchronous Communications Mode
Values: n = 0, 5, 6, 8, or 9
Default: 5
Description:
&Q0 Asynchronous with data buffering. Same as \N0 .
&Q5 Error control with data buffering. Same as \N3 .
&Q6 Asynchronous with data buffering. Same as \N0 .
&Q8 MNP error control mode. If MNP error control is not established, the modem falls back
according to the setting in S36 .
&Q9 V.42 or MNP error control mode. If neither error control is established, the modem
falls back according to the setting in S36 .
Command: &S n Data Set Ready (DSR) Control
Values: n = 0 or 1
Default: 0
Description:
&S0 DSR is always ON.
&S1 DSR goes ON only during a connection.
Command: &T n Loopback Test (V.54 Test) Commands
Values: n = 0, 1, 3, 6
Default: None
Description:
The modem can perform selected test and diagnostic functions. A test can be run only when
the modem is operating in non-error-correction mode (normal or direct mode). For tests 3
and 6, a connection between the two modems must be established. To terminate a test in
progress, the escape sequence (
+++AT ) must be entered.
&T0 Stops any test in progress.
&T1 Starts a local analog loopback, V.54 Loop 3, test. If a connection exists when this
command is issued, the modem hangs up. When the test starts, a CONNECT
message is displayed.
&T3 Starts local digital loopback, V.54 Loop 2, test. If no connection exists, ERROR is
returned.
&T6 Initiates a remote digital loopback, V.54 Loop 2, test without self-test. If no connection
exists, ERROR is returned.
Command:
&V Display Current Settings
Values: N/A
Description: Displays the active modem settings.