Dell PowerConnect 5524P User Manual page 249

Integrated Cable Test
Time Domain Reflectometry (TDR) technology is used to test the quality
and characteristics of a copper cable attached to a port. Cables up to 120
meters long can be tested. Cables can only be tested when the ports are in the
down state, with the exception of Approximated Cable Length test.
This test can only be performed when the port is up and operating at 1 Gbps.
To perform a cable test and view the results:
1 Click System > Diagnostics > Integrated Cable Test: Summary in the
tree view to display the Integrated Cable Test: Summary page.
Figure 9-29. Integrated Cable Test: Summary
2 Select a unit in the stack in the Unit ID field. Results from previously-run
tests on that unit are displayed.
3 Ensure that both ends of the copper cable are connected to a device.
Dell PowerConnect 55xx Systems User Guide
249