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Local Loopback Test with Self-Test
Issue 2 November 1996
D-5
NOTE:
Initiating this test disconnects a call if one is in progress.
Figure D-3. Local Loopback Test with Self-Test
Performing a Local Loopback Test with
Self-Test
To initiate the test, type:
AT&T8
This test will continue for the period of time indicated in S-register S18. To
terminate the test before the test timer expires, type:
AT&T0
The system responds with the error count, then the completion signal:
000
OK
Local DTE
8400B Plus
Transmitter
Test Circuit
S
W
I
T
C
H
Receiver
ENTER
ENTER