Nortel 8300 Troubleshooting Manual page 108

108 Troubleshooting tools
Field
TestDone
Cable Status
PairnStatus
Pairn ErrLength
Job aid: VCT configuration example
You can test VCT on a port from either the Global configuration mode or
the Interface configuration mode. This configuration example uses the
commands described previously to perform the following tasks:
•
•
Example 1: Configuring VCT from Global Configuration mode
Copyright © 2007, Nortel Networks
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Description
Indicates whether the VCT test is complete or not.
When a test is started by setting StartTest to TRUE,
this flag is immediately set to FALSE. This field is set to
TRUE when the test is complete.
Status of the cable as a whole. The status of a cable is
in a sense, a summation of the status of its pairs. If all
of the pairs are normal, then the cable is normal.
If the cable consists of zero or more normal pairs and
one or more open pairs, then the cable is considered
open. If the cable consists of shorted pairs and
normal pair, then the cable is considered shorted. Any
combination of open and shorted pairs is considered
FAILED.
Indicates status of the twisted pair. Where n is a number
that specifies the different cable pairs.
The length of twisted pair number, as measured by Time
Domain Reflectometry (TDR).
Where n is a number that specifies the different cable
pairs.
This measurement can only be done if the pair is open
or shorted. Therefore, this is an "Error" length. If the pair
is good and properly terminated there is no reflection
to measure.
Configure VCT from Global Configuration mode. See
Configuring VCT from Global Configuration mode" (page
Configure VCT from Interface Configuration mode. See
Configuring VCT from Interface Configuration Mode" (page
Nortel Ethernet Routing Switch 8300
Troubleshooting
NN46200-704 01.01 Standard
4.0 29 October 2007
"Example 1:
108).
"Example 2:
109).