TP-Link TL-SG3109 User Guide - Page 150
PHY Diagnostics Commands, test copper-port tdr
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TL-SG3109/TL-SL3428/TL-SL3452 Gigabit Managed Switch Family CLI Reference Guide Section 13. PHY Diagnostics Commands test copper-port tdr The test copper-port tdr Privileged EXEC mode command uses Time Domain Reflectometry (TDR) technology to diagnose the quality and characteristics of a copper cable attached to a port. Syntax test copper-port tdr interface Parameters • interface - A valid Ethernet port. (Full syntax: port) Default Configuration This command has no default configuration. Command Mode Privileged EXEC mode User Guidelines The port to be tested should be shut down during the test, unless it is a combination port with fiber port active. The maximum length of the cable for the TDR test is 120 meter. Examples The following example results in a report on the cable attached to port 3. Console# test copper-port tdr 3 Cable is open at 64 meters Console# test copper-port tdr 3 Can't perform this test on fiber ports Page 149