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V54Lback

This parameter applies only to platforms with a built-in CSU/DSU port.

Syntax

SET -SYS V54Lback = YES | NO | START | STOP
SHow -SYS V54Lback

Default

NO

Description

The V54Lback parameter detects or initiates or a V.54 loopback test on the built-in CSU/DSU port when connected to a V.54 compliant device over the telephone network.

The SHow command displays the status of a loopback test in progress and whether the command has been set to YES or NO.

Enter YES to enable V.54 detection, and then START to begin a loopback test. The loopback test runs for approximately one minute. If the loopback test was successful, the following message is displayed:
V.54 data loopback succeeded

If the destination device does not respond, the following message is displayed:
V.54 local loopback terminated - remote site not responding

If the data is corrupted and the line is not error free, the following message is displayed:
V.54 data loopback failed - check for documented errors

If this message is displayed, contact your line provider for help.

If the local unit cannot transmit data at that particular time, the following message is displayed, and you should try again later:
V.54 SCC Transmit failed

Values

YES

Enables V.54 detection. Specifying YES enables the CSU/DSU port to accept and initiate a loopback test.

NO

Disables V.54 detection.

START

Begins a V.54 loopback test.

STOP

Stops a V.54 loopback test.

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