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Local Loopback Test
Issue 2 November 1996
D-3
The system responds with the completion signal:
OK
Local Loopback Test
This test evaluates the connection between your terminal or PC and the 8400B
Plus Data Module. With this test, you can send data from your keyboard,
through the computer, to the data module. The data module then returns the
data to your computer screen without sending it over any communications line.
This allows you to compare the characters on the screen with those you typed.
If the data does not match, troubleshoot your EIA Connector cord and terminal.
If these are operating correctly, your 8400B Plus Data Module may be defective.
Call the Lucent Technologies Technical Service Center at 1 800 242-2121.
NOTE:
Initiating this test disconnects a call if one is in progress.
Figure D-2. Local Loopback Test
Characters
Received
Local DTE
S
W
I
T
C
H
Sent
Characters
8400B Plus
Transmitter
Receiver