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Issue 2 November 1996 D-1
D
Isolating Problems Using
Loopback Data Tests
This appendix provides information on how to perform loopback tests to isolate
problems involving the 8400B Plus Data Module.
Data Loopback Test
The data loopback test aids the remote user. It excludes the local EIA interface
and the local data terminal equipment. The remote equipment sends a test
message that is received at the local 8400B Plus Data Module. The test
message is then looped back to the remote endpoint. This allows the remote
user to verify that the remote endpoint and communication link are operating
correctly.
NOTE:
A data call must be in progress for the data loopback test.