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Chapter 7: AT Commands and Registers
7-34 CSMIM-T1 Hardware Installation Guide
&T1 makes the modem display the characters on your screen
exactly as you type them. The modem must be in normal or direct
mode and set to 1200 bps or higher.
&T3 allows a remote modem that does not support the ITU-T
V.54 standard to perform a Remote Digital Loopback test with
your modem. The modem must connect in normal or direct mode
and be set to 1200 bps or higher.
&T4 allows the modem to respond to a remote caller’s request to
enter Remote Digital Loopback mode.
&T5 prevents the modem from responding to a Remote Digital
Loopback request.
&T6 instructs the remote modem to initiate a Remote Digital
Loopback. It is available only when the modem is connected in
normal or direct mode and set to 1200 bps or higher.
&T7 instructs the remote modem to enter a Remote Digital
Loopback with Self-Test. Upon completion of the test, the modem
reports errors to the local device. This command is available only
when the modem connects in normal or direct mode and is set to
1200 bps or higher.
&T8 makes the modem send itself the ITU-T V.54 test pattern
and verify these characters. Upon completion of the test, the
modem reports errors to the local device. This command is
available only when the modem is in normal or direct mode and
set to 1200 bps or higher.
\T
n
Inactivity Timer
Where n is an integer from 0 and 90 in minutes (Default is 0).
Specifies the number of minutes the modem waits for data before
automatically hanging up. \T0 (default) disables the inactivity
timer. The inactivity timer is only available during normal and
reliable link connections; the modem ignores it in direct mode.
%U
n
Clear Serial-Port Speed
%U0 Allows the current serial-port speed change from any speed.
%U1 Always keeps the current serial-port speed. To change serial-port
speed, you must enter %U1 each time you change it.
%U2 Allows the current serial-port speed change from any speed.