AT&T 7400B Plus User Manual page 149

DEFINITY Communications System
7400B Plus Data Module
User´s Guide
Command:
Function:
Type:
Arguments:
S-Register:
Example:
Comments
See Also:
&T
Control diagnostic and test facilities.
immediate
The &T command accepts one of eight arguments (see comment
2) as follows:
0 - (or no option) terminate any test in progress (see comment 3)
1 - initiate local loopback test
2 - same as 1
3 - initiate local data loopback test
4 - allow remote loopback requests from the remote system
(factory-default selection)
5 - deny remote loopback requests from the remote system
6 - initiate remote loopback test
7 - initiate remote loopback test with self-test
8 - initiate local loopback test with self-test
Bits 0 and 2—6 of S16 are set according to the argument used
with the &T command.
at&t3 ( ) (see comment 1)
Enter
In the example, a local data loopback test is initiated.
1
All argument values in the range of 0—8 are valid. All of
2
the options selected by the command arguments described
above are accepted and implemented by the 7400B Plus.
If the local digital loopback or remote digital loopback tests
3
are in progress, it is necessary to issue the escape sequence
to return to command mode before the &T0 command can
be used to terminate these tests. The test timer value stored
in S18 can also be set to halt automatically any locally
initiated test in progress.
Chapter 3, "Configuration and Operation"; Appendix C, "S-
Registers."
APPENDIX A: AT COMMAND SET
Page A-18