Appendix A AT Commands
41
&S1
DSR comes on after establishing a connection and goes off
when the connection ends.
&T<value>—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.
&T0
Abort. Terminates the test in progress.
&T1
Initializes local analog loopback, V.56 Loop 3. If a connection
exists when this command is issued, the modem hangs up. The
modem displays the CONNECT <rate> message at the start of
the test.
&T3
Local digital loopback test, V.54 Loop2. If no connection exists,
the soft modem returns ERROR.
&T6
Requests a remote digital loop back, V.54 Loop 2 without self
test. If no connection exists, the soft modem returns ERROR
and generates the CONNECT<rate> result code.
&V<value>— Display Current Configuration
Use this command to display the current soft modem configuration. The
modem maintains two stored profiles and the active profile. This command
displays all three configurations and any stored telephone numbers.
&W<value>—Store Current Configuration
Use this command to store the modems command options and all S registers
except S3, S4, and S5. The
Z<value>
command or a powerup reset, of the
modem, restores this profiles.
&W0
Stores the current configuration as profile 0.
&W1
Stores the current configuration as profile 1.
&Y<value>—Select Stored Profile for Hard Reset
This command does not change the behavior of the modem but is included
for compatibility with applications that issue the
&Y
command.
&Z<storage location>=<dialing sting>—Store Telephone Number
Use this command to store a dialing string. The soft modem can save four
dialing strings. The dial string may contain up to 34 characters. The
ATDS=<storage location>
command dials using the stored string.
