D-Link DGS-3120-24TC Product Manual - Page 289
xStack® DGS-3120 Series Managed Switch Web UI Reference Guide, Short, CrossTalk, Unknown
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xStack® DGS-3120 Series Managed Switch Web UI Reference Guide Figure 10-21 Cable Diagnostics window To view the cable diagnostics for a particular port, use the drop-down menu to choose the 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. 281