Multi-Tech Systems MT5600BA-V92 manual Command &T n Test Command, No Carrier ATS86?

Chapter 2 – AT Commands

Automated system that needs to periodically use the line while giving the voice user the highest priority

A common use for these features: An automated system that needs to periodically use the line while giving the voice user the highest priority. The automated system makes a connection when the line is free. It does this without disturbing the line if the line is in use. The automated system periodically retries the connection until the line is free.

Once free, it dials and makes its connection. If a voice user wishes to use the line while the modem is connected. the modem drops the line and gives it to the user. The modem will then try to regain control of the line by once again periodically retrying to establish a connection.

AT-STE=7

OK ATDT5551212

CONNECT

Sometime later, the user picks up phone

NO CARRIER ATS86?

25 OK

Delay 30 seconds ATDT5551212

LINE-IN-USE

Try again some time later user hangs up the phone

CONNECT

Test Command

Command: &Tn	V.54 Test Command
Values:	n = 0, 1, 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 operation in non-error-correction mode (normal or
	direct mode). To terminate a test in progress, the escape sequence (+++) must be entered
	first.
	&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 CONNECT message is displayed at
		the start of the test.
	&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.

Multi-Tech Systems, Inc. AT Commands Reference Guide (S000273G) 27