Question

Dificulty tracing CAT5 cable

Asked by: edcommit

I am having a problem tracing our network cables.  We use a mix of CAT5e and CAT6.  I am using an Extech Tone Generator 40180.  I can get tone from the generator, but as soon as i plug into the wall jack the tone goes dead.  The data cables go from the wall plate to a patch panel and then to a switch.  Would the Tempo AT8L fix my issue?  I am thinking spiting the tone would help?

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Asked On
2009-07-23 at 10:57:30ID24595574
Tags

CAT 5 cablem

,

tracing

Topic

Networking Cables

Participating Experts
2
Points
125
Comments
3

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Answers

 

by: MaerosPosted on 2009-07-26 at 09:49:30ID: 24946549

Just for clarification, are you testing for tone from horizontal cabling all the way through to a switch?  If you are, for example, putting the generator on the horizontal cabling and hitting the probe on the switch, you will not get a response as the switch is a smart device which will only bridge connections with MAC addressing contained in PDUs and not straight physical tone.  Try placing the probe on the patch panel instead, as everything you are dealing with from between the wall jack and patch panel should just be pure structured cabling.

 

by: dannlhPosted on 2009-08-14 at 15:33:30ID: 25102922

The circuit is probably shorted at the remote end of the link. (not necessarily "bad" shorted, just electrically appears as a short to the toner)

 Unplug the switch from the cables if you want to trace the cables with a tone, or only hook up half the toner (one side of the pair).

Dan

 

by: dannlhPosted on 2009-08-17 at 17:50:48ID: 25119481

BTW, the AT8L mentioned by the questions author looks like a nice little gadget for LAN testing since it can blink either switch or PC link LEDs at the other end of the circuit and has full 8 position RJ break-out plus aligator clips...

If you have all your cicruits from the panel connected to a switch this would certainly be an easier way to find out which switch port you are on when you plug this into the wall. That being said, you really shouldn't leave un-used circuits connected to the switch. That's just asking for trouble... (I never leave them all connected ... wink wink... nudge nudge...)

dh

20120131-EE-VQP-002

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