# Cable diagnostics

### 1. Summary

This page is for diagnosing whether cable failures have occurred.

The cable diagnostics can check failures of the LAN cables connected to the LAN ports of this unit.

You can use this to troubleshoot network problems or as a simple cable check when setting up a network.

Please note that this diagnostics is a simplified function, so it cannot detect as precisely as a specialized device.

Cables should be longer than 10m for correct diagnostics.

The diagnostics does not work correctly if the port is supplying PoE power.

### 2. Top page

This top page is for cable diagnostics.

#### 2.1. Cable diagnostics

- Press the "OK" button to perform the cable diagnostics.

  - The following ports are not able to perform cable diagnostics.

    - The port interface is disabled

    - The port is shut down by loop detection

    - The port is shut down by spanning tree

    - The port is shut down by port security violation

  - The port under diagnostics will temporarily linke down.

- Press the "Discard diagnostics results" button to delete the last cable diagnostics results.

- The cable diagnostics results show the following items.

  - Port

    - The port performed diagnostics.

  - Result

    - The status of cable connected to LAN port.

      - OK : Electrically connected.

      - Open : A target device is not connected, or the cable is damaged.

      - Short : The cable is shorted.

  - Distance to the cable failure point

    - If the result is "Open" or "Short", displays the distance from the LAN port to the cable failure point in meters.

Search result
No more search results.
There are no topics that match your search query.