D-Link DGS-3620-52T CLI Guide - Page 215

xStack® DGS-3620 Series Layer 3 Managed Stackable Gigabit Switch CLI Reference Guide  Where the link partner is powered on with errors, this command can detect whether the error is open, short, or crosstalk. In this case this command can also detect the distance of the error.  Where the link partner is powered down with no errors and the link is down, this command can detect the cable length.  When the link partner is powered down with errors, this command can detect whether the error is open, short, or crosstalk. In this case this command can also detect the distance of the error.  When there is no link partner with no errors, this command can detect the cable length.  When there is no link partner with errors, this command can detect whether the error is open, short, or crosstalk. In this case this command can also detect the distance of the error. The Cable length range that can be detected is as follows:  Smaller than 50m (100m) Note: This test will consume a low number of packets. Since this test is for copper cable, the port with fiber cable will be skipped from the test. Format cable_diag ports [ | all] Parameters - Specify a range of ports to be configured. all - Specify to set all ports in the system. Restrictions Only Administrator, Operator and Power-User level users can issue this command. (EI Mode Only Command) Example To test the cable on ports 1 to 4, and 8: 210