3Com 3CBLSG48 User Manual page 193

182 C M
HAPTER 16: AnAgIng
Configuring Cable
Diagnostics
D D
EVICE IAgnOSTICS
The Cable Diagnostics Summary Page contains the following fields:
Ports — Specifies the port to which the cable is connected.
Test Result — Displays the cable test results. Possible values are:
Open — Indicates a cable is not connected, or the cable is
connected on only one side, or the cable is shorter than
1 meter.
Short — Indicates that a short has occurred in the cable.
OK — Indicates that the cable passed the test.
Cable Fault Distance — Indicates the distance from the port
where the cable error occurred, in meters.
Last Update — Indicates the last time the port was tested.
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.
The minimum cable length resolution is one meter, so if the cable
is shorter than 1 meter the test will display "no cable".
An open cable or a 2-pair copper cable will display a cable fault
distance of 0.
The maximum cable length is 120 meters.