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MIU Installation, Operation & Diagnostics Edition: March 30, 1998 Page 19
&T0 TERMINATE TEST IN PROGRESS
If a V.54 loopback test is in progress as a result of executing an &Tn
command, then the &T0 command will cause that test to be terminated,
provided that the modem is in the command state or a V.54 state that
accepts commands from the DTE. See specific &Tn command
descriptions for termination actions.
&T1 INITIATE LOCAL ANALOG LOOPBACK (See Figure 2)
When the AT&T1 command is entered, the modem goes on hook and
configures itself for analog loopback. DSR is turned off (if &S1 is in
effect), the analog loopback state is entered, and the test timer is set to
the value in S18. A connect result code is sent to the DTE, and the test
timer then begins its count down. The test terminates when the test
timer expires. If S18 equals 0, then the test must be terminated by an
&T0, H0, or Z command. While any command may be entered while
the modem is in this test state, the modem response is not specified
except for H0, &T0 and Z, any of which will terminate the test. Upon
termination of the test, the modem enters the command state.
RESULT CODE DESCRIPTION
CONNECT When local analog loopback state is
entered.
ERROR If any other &Tn test is active (except
&T0) or if in the on-line command
state.
OK After test is stopped by test timer, the
H0 command, or the &T0 command.