4 at commands, s-registers, and result codes, Multimodemii user guide – Multitech MULTI MODEM II MT5600BA User Manual
Page 45
4 AT Commands, S-Registers, and Result Codes
39
MultiModemII User Guide
Command:
&R
n Clear to Send (CTS) Control
Values:
n = 0 or 1
Default:
1
Description:
&R0
Let the CTS state follow the RTS state when online..
&R1
Force CTS high (ON).
Note:
This command applies only in synchronous mode.
Command:
&S
n
Data Set Ready (DSR) Control
Values:
n = 0 or 1
Default:
0
Description:
&S0
Force DSR high (on) at all times.
&S1
Let DSR go high only during a connection.
Command:
&T
n
V.54 Test Commands
Values:
n = 0, 1, 3, 4, 5, 6, 7, or 8
Default:
None
Description:
The modem can perform selected test and diagnostic functions. A
test can be run only when the modem is in asynchronous op-
eration in non-error-correction mode (normal or direct mode).
For tests 3, 6, and 7, a connection between the two modems
must first be established. To terminate a test in progress, the
escape sequence (+++) must be entered first, except for param-
eters 7 and 8. If S18 is non-zero, a test terminates automatically
after the time specified by S18 and displays the OK message.
&T0
Abort. Stop any test in progress.
&T1
Start local analog loopback, V.54 Loop 3. If a connection exists
when this command is issued, the modem hangs up. A CON-
NECT message is displayed at the start of the test.
&T3
Start local digital loopback, V.54 Loop 2. If no connection exists,
ERROR is returned.
&T4
Enables acknowledgment for remote digital loopback request.
&T5
Ignores acknowledgment for remote digital loopback request.
&T6
Requests a remote digital loopback, V.54 Loop 2, without self-
test. If no connection exists, ERROR is returned. The CON-
NECT XXXX message is displayed at the start of the test.
&T7
Requests a remote digital loopback, V.54 Loop 2, with self-test.
(In self-test, a test pattern is looped back and checked by the
modem.) If no connection exists, ERROR is returned. When the
test is terminated, the number of detected errors is reported to
the computer.
&T8
Starts local analog loopback, V.54 Loop 3, with self-test. If a
connection exists, the modem hangs up before the test begins.
When the test is terminated, the number of detected errors is
reported to the computer.
Command:
&V0
Display Current Configuration
Values:
0
Default:
None
Description:
Displays the current (active) configuration.
Note:
See also the L5 command.