Cable diagnostics function XGS1930

Alberto77
Alberto77 Posts: 6
First Comment First Anniversary
in Switch
Good morning,
I have tested cable diagnostics function on XGS1930 and i have found a strange result about Cable lenght result.
I have test a cable of about 1 m leght but the test function detect a lenght of 4 m.
I have repeated the test with a 15 m cable and the test result 22m.
If i repeat the test with the same cable the result doesn't change.
Why there is this different beetwen real lenght and mesaure lenght?

This is the example with 1 m cable:


Thanks 

All Replies

  • Zyxel_Chris
    Zyxel_Chris Posts: 727  Zyxel Employee
    Zyxel Certified Network Administrator - WLAN Zyxel Certified Network Administrator - Nebula Zyxel Certified Sales Associate 50 Answers
    @Alberto77,
    It's related to the cable quality and the peer device also affected, can you please unplug the peer side cable and test it again, please refer to the "Distance to fault" this time.
  • HorstB
    HorstB Posts: 1
    First Comment
    There is a 65m CAT.7 cable between a GS1900-8HP and a GS1900-24E.
    The cable lengths in tech-support logfiles are 8HP: 75m, 24E: 95m 
    so I understand the length as an approach.

  • Alberto77
    Alberto77 Posts: 6
    First Comment First Anniversary
    I have made a test with cable disconnected:

    but the result is still wrong (the real lenght of the calbe is 1 m).
    I also try the 15 m cable:

    In this case the result is good.

  • Zyxel_Chris
    Zyxel_Chris Posts: 727  Zyxel Employee
    Zyxel Certified Network Administrator - WLAN Zyxel Certified Network Administrator - Nebula Zyxel Certified Sales Associate 50 Answers
    @Alberto77,
    The cable length will more accurate when it's up to 10 meters.

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