ADTRAN AOS Version R10.1.0 Command Reference Manual page 1911

Command Reference Guide
test tscan
Use the test tscan command to initiate a Tscan test, as well as configure and display Tscan test parameters
for the interface. Variations of this command include:
test tscan
test tscan clear-results
test tscan display-results
Syntax Description
clear-results
display-results
Default Values
By default, Tscan tests are not run on the interface.
Command History
Release A4.05
Functional Notes
The Tscan line test is a testing feature that allows users to isolate faults in lines by estimating the distance
to the fault and determining the type of fault, whether a short or an open connection. Tscan is an intrusive
test, which causes trained SHDSL loops to go down, but it is useful as a method for finding faults in loops
that will not train, rather than as a performance metric for operational loops.
Tscan tests can be started on any port that is enabled. Tscan tests typically take from 20 seconds to one
minute to complete, and timeout after 90 seconds to restore control to the command line interface (CLI).
When the test is complete, results are displayed in the CLI or can be viewed at a later time using the
command test tscan display-results. Displayed results include the date and time of the test, the status of
the test, the line rate used while Tscan operates (typically 16 or 32 DSOs), the distance to the fault if one is
detected (displayed in feet), and the fault type that is found. The minimum distance for the Tscan test is 0
feet and the maximum Tscan test distance is 1200 feet.
Usage Examples
The following example initiates a Tscan test on SHDSL interface 1/1:
(config)#interface shdsl 1/1
(config-shdsl 1/1)#test tscan
60000CRG0-35E
Clears the Tscan test results from previously completed Tscan tests.
Displays the results of the most recently completed Tscan test.
Command was introduced.
Copyright © 2012 ADTRAN, Inc.
SHDSL Interface Command Set
1911