D-Link xStack DGS-3420 Series Reference Manual page 362

xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch Web UI Reference Guide
To view this window, click OAM > Cable Diagnostics as shown below:
To view the cable diagnostics for a particular port, use the drop-down menu to choose the Unit ID and Port and
click Test The information will be displayed in this window.
NOTE: Cable diagnostic function limitations. Cable length detection is only supported on GE ports.
Ports must be linked up and running at 1000M speed. Cross-talk errors detection is not
supported on FE ports.
NOTE: The available cable diagnosis length is from 5 to 120 meters.
NOTE: The deviation of cable length detection is +/- 5M for GE ports.
Fault messages:
•
Open - This pair is left open.
•
Short - Two lines of this pair is shorted.
•
CrossTalk - Lines of this pair is short with lines in other pairs.
•
Unknown - The diagnosis does not obtain the cable status, please try again.
•
NA - No cable was found, maybe it's because cable is out of diagnosis specification or the quality is too
bad.
Figure 10-22 Cable Diagnostics window
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