4 AT Commands, S-Registers, and Result Codes

 

&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.

Command:

&V1

 

Display Last Connection Statistics

Values:

 

1

Default:

 

None

Description:

 

 

Displays statistics for the last connection.

Command:

&Wn

 

Store Current Configuration

Values:

 

 

n = 0 or 1

Default:

 

None

Description:

&W0

 

Stores current modem settings in nonvolatile memory as Profile 0.

 

 

 

Profile 0 is loaded instead of the factory defaults at power-on

 

 

 

(if &Y0 is set) and by the ATZ command.

 

&W1

 

Stores current modem settings in nonvolatile memory as Profile 1.

 

 

 

Profile 1 is loaded instead of the factory defaults at power-on

 

 

 

(if &Y1 is set) and by the ATZ1 command.

 

 

 

 

 

 

 

Note: See also the Z, &F, and &Y commands.

 

 

 

 

Command:

&Xn

 

Synchronous Clock Source

Values:

 

 

n = 0, 1, or 2

Default:

 

0

Description:

 

 

Selects the source of the transmit clock for synchronous mode.

 

 

 

In asynchronous mode, the transmit and receive clocks are

 

 

 

turned off. In synchronous mode, the clocks are turned on with

 

 

 

a frequency of 1200 Hz or faster corresponding to the speed

 

 

 

that is selected for modem operation.

 

&X0

 

Selects internal timing. The modem generates the transmit

 

 

 

clock signal and applies it to the TXCLK output at the serial

 

 

 

interface.

 

&X1

 

Selects external timing. The local DTE sources the transmit clock

 

 

 

signal on the XTCLK input of the serial interface. The modem

 

 

 

applies this clock to the TXCLK output at the serial interface

41

Page 49
Image 49
Multi-Tech Systems MT5600BL Display Current Configuration, Display Last Connection Statistics, Store Current Configuration