Asynchronous Communications Mode; Data Set Ready (Dsr); Self-Test Commands; View Active Configuration - Multitech MultiModem SocketModem MT9234 Series At Commands Reference Manual

&Q
Description:
Syntax:
Values:
Default:
Result Codes:
&S
Description:
Syntax:
Values:
Default:
Result Codes:
&T
Description:
Syntax:
Values:
Default:
Result Codes:
&V
Description:
Syntax:
Multi-Tech Systems, Inc. AT Commands for the MultiModem & SocketModem MT9234 Series (S000434H)
Downloaded from Elcodis.com electronic components distributor
Chapter 1 – AT Commands, S-Registers, and Result Codes

Asynchronous Communications Mode

This command is supported to ensure backward compatibility with communication
software that issues the &Q command. The preferred method for changing the
asynchronous communication mode is to use the \N command.
AT&Q<value>
0 Asynchronous with data buffering. Same as \N0.
5 Error control with data buffering. Same as \N3.
6 Asynchronous with data buffering. Same as \N0.
8 MNP error control mode. If MNP error control is not established, the modem
falls back according to the setting in S36.
9 V.42 or MNP error control mode. If neither error control is established, the
modem falls back according to the setting in S36.
5
OK if <value> = 0, 5, 6, 8, or 9.
ERROR if <value> ≠ 0, 5, 6, 8, or 9.

Data Set Ready (DSR)

Use this command to control DSR action.
AT&S<value>
0 DSR is always ON.
1 DSR goes ON only during a connection.
0
OK if <value> = 0,1.
ERROR if <value> ≠ 0, 1.

Self-Test Commands

Use this command to perform diagnostic tests on the modem. Each test is designed
to isolate a problem location when experiencing periodic data loss or random errors.
AT&T<value>
0 Terminates the test in progress.
1 The &T1 command runs the Local Analog Loopback Test. This test verifies
modem's transmitter and receiver circuits are functioning properly. To work
properly, the modem must be off-line.
3 The AT3 runs the Local Digital Loopback Test. This test allows you to verify
that the remote computer or terminal, the remote modem, serial ports, the
telephone line, and the local modem are functioning properly. To work
properly, the modem must be online.
4 The &T4 command must be sent to the remote modem to run the Remote
Digital Loopback Test.
6 The &T6 command runs the Remote Digital Loopback Test. This test allows
you to verify that the local computer or terminal, the two modems, and the
transmission line between them are functioning properly. To work properly,
the modem must be online.
None
OK if <value> = 0.
CONNECT if <value> = 0 or 3.
ERROR if <value> ≠ 0, 1, or 3.

View Active Configuration

Use this command to view the active configuration.
AT&V
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