4-13
Issue 3 April 1994
Table 4-1. AT Command and S-Register Reference (12 of 27)
AT
Command
or
S-Register
Description
&T
n
Tests
The &T command allows you to perform diagnostic
tests on your modem. The modem must be configured
for Direct mode (\N1) before a test is started.(Note that
commands &T1, &T6, &T7, and &T8 can also be
performed in Buffer mode (\N0).) The test invoked by
commands &T1–&T8 run until the &T0 command
(Abort) is issued.
&T0 Stops any test in progress and displays results.
&T1
Local Analog Loopback test.
&T2
Pattern test.
&T3 Local Digital Loopback test.
&T4 Accepts Remote Digital Loopback test request.
&T5 Denies Remote Digital Loopback test request.
&T6 Remote Digital Loopback test.
&T7 Remote Digital Loop back test with Pattern.
&T8 Local Analog Loopback test with Pattern.
&T9 Self-test.
