AT Commands and S-Registers
B-26
Issue 1 April 1994
Table B-1. AT Command and S-Register List (25 of 34)
AT
Command/
S-Register
Description
&T
n
Tests
Initiates and terminates Loopback and Pattern
tests. Only one test can run at a time.
&T0
Stops any test in progress and displays
test results.
&T1
Local Analog Loopback test.
&T2
Pattern test.
&T3
Local Digital Loopback test.
&T4
Accepts request for Remote Digital
Loopback test.
&T5
Denies request for Remote Digital
Loopback test.
&T6
Remote Digital Loopback test.
&T7
Remote Digital Loopback test with Pattern.
&T8
Local Analog Loopback test with Pattern.
&T9
Self-test.
NOTE:The DataPort 2001 must be in Direct
mode (\N1) to perform a test. Commands &T1,
&T6, &T7, and &T8 also can be performed in
Buffer mode (\N0). The AT&T0 must be issued to
display test results.