210
C
18: M
HAPTER
ANAGING
Configuring Cable
Diagnostics
D
D
EVICE
IAGNOSTICS
Cable Fault Distance — Indicates the distance in meters from the
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port where the cable error occurred.
Last Update — Indicates the last time the port was tested.
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The Diagnostics Page contains fields for performing tests on copper
cables. Cable testing provides information about where errors occurred in
the cable, the last time a cable test was performed, and the type of cable
error which occurred. The tests use Time Domain Reflectometry (TDR)
technology to test the quality and characteristics of a copper cable
attached to a port.
When performing cable tests consider the following:
During the tests, ports are in the down state.
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The minimum cable length resolution is one meter, so if the cable is
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shorter than 1 meter the test will display "no cable".
An open cable or a 2-pair copper cable will display a cable fault
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distance of 0.
The maximum cable length is 120 meters.
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