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Groups > alt.comp.microsoft.windows > #2715

Re: Crimping tool, odd review

From Dan Purgert <dan@djph.net>
Newsgroups alt.os.linux, uk.comp.os.linux, alt.comp.microsoft.windows
Subject Re: Crimping tool, odd review
Date 2025-05-29 22:55 +0000
Organization A noiseless patient Spider
Message-ID <slrn103hpe9.882.dan@djph.net> (permalink)
References (1 earlier) <jKm*ZBGdA@news.chiark.greenend.org.uk> <1019f0h$3r5ur$1@dont-email.me> <kKm*FmIdA@news.chiark.greenend.org.uk> <101a54q$3vmta$1@dont-email.me> <lKm*bSIdA@news.chiark.greenend.org.uk>

Cross-posted to 3 groups.

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On 2025-05-29, Theo wrote:
> In uk.comp.os.linux Java Jive <java@evij.com.invalid> wrote:
>> On 2025-05-29 17:34, Theo wrote:
>> > Either that or an RJ45 socket at each end and a multimeter.  But the tester
>> > makes it quicker.
>> > 
>> > (can't speak for that tester - you need to test for open circuits, shorts
>> > and mis-wired pairs and I can't tell if it does that.  In particular if it's
>> > structured wiring you need to be able to test from one end because you can't
>> > see both ends at the same time as the cable runs through the building -
>> > unless you can run a long patch cable back to the start)
>> As I understand, the two halves of those testers slide apart and you can 
>> put one half at each end to perform the test.
>
> Do you need to see both ends to run the test, or is one sufficient?
>
> I saw a video showing that a green light on each part scans down the numbers
> 1 to 8 then 'G'.  But I'm not sure if you are testing that the lights match
> at both ends, or if a fault is only shown at the end that detects it.
>
> (eg if you had open circuit at one end and a short at the other, what would
> it tell you?)

Yes, you need both ends in order to complete the test circuit; but you
can look at them independently. Verification is basically that on the
REMOTE end (smaller unit without the battery), the LEDs count in the
correct order (1,2,...8,G).  LEDs on the main end (the one with the
battery) -- at least in the testers I have here -- are just wired in
parallel to the conductor under test, and don't actually provide any
insight into the conductor state.

Note that these LED testers will only find *electrical* faults (crossed
conductors, missed terminations, etc.); but the testers can't confirm if
the run is actually "good". For example, if it got crushed in a bend
somewhere, electrically the cable is OK, but the excessive bend radius
may cause problems at gbit speeds.

-- 
|_|O|_| 
|_|_|O| Github: https://github.com/dpurgert
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Thread

Crimping tool, odd review Java Jive <java@evij.com.invalid> - 2025-05-28 15:37 +0100
  Re: Crimping tool, odd review Andy Burns <usenet@andyburns.uk> - 2025-05-28 19:20 +0100
    Re: Crimping tool, odd review Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-05-29 04:17 +0000
  Re: Crimping tool, odd review Chris Green <cl@isbd.net> - 2025-05-28 19:29 +0100
  Re: Crimping tool, odd review Theo <theom+news@chiark.greenend.org.uk> - 2025-05-29 09:33 +0100
    Re: Crimping tool, odd review Java Jive <java@evij.com.invalid> - 2025-05-29 12:04 +0100
      Re: Crimping tool, odd review Theo <theom+news@chiark.greenend.org.uk> - 2025-05-29 17:34 +0100
        Re: Crimping tool, odd review Java Jive <java@evij.com.invalid> - 2025-05-29 18:22 +0100
          Re: Crimping tool, odd review Theo <theom+news@chiark.greenend.org.uk> - 2025-05-29 19:48 +0100
            Re: Crimping tool, odd review Java Jive <java@evij.com.invalid> - 2025-05-29 23:02 +0100
              Re: Crimping tool, odd review Paul <nospam@needed.invalid> - 2025-05-30 06:05 -0400
                Re: Crimping tool, odd review Dan Purgert <dan@djph.net> - 2025-05-30 14:10 +0000
              Re: Crimping tool, odd review Jasen Betts <usenet@revmaps.no-ip.org> - 2025-07-01 09:10 +0000
                Re: Crimping tool, odd review Java Jive <java@evij.com.invalid> - 2025-07-01 18:46 +0100
                Re: Crimping tool, odd review "Carlos E.R." <robin_listas@es.invalid> - 2025-07-01 20:58 +0200
            Re: Crimping tool, odd review Dan Purgert <dan@djph.net> - 2025-05-29 22:55 +0000
              Re: Crimping tool, odd review Java Jive <java@evij.com.invalid> - 2025-05-30 11:56 +0100
            Re: Crimping tool, odd review "Carlos E. R." <robin_listas@es.invalid> - 2025-05-30 16:20 +0200
  Re: Crimping tool, odd review Dan Purgert <dan@djph.net> - 2025-05-29 11:21 +0000
    Re: Crimping tool, odd review Chris Green <cl@isbd.net> - 2025-05-29 12:38 +0100
    Re: Crimping tool, odd review "Carlos E. R." <robin_listas@es.invalid> - 2025-05-29 13:54 +0200

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