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I have bought a network cable tester and in the manual it said that all lights from 1-8-G should light up in sequence. However I get only 8 without G, although the cable is in working condition.

Here is a picture of the manual:

enter image description here

Here is a video

The product's model is NS-468. If you have the same product, can you tell me what is wrong and what G is intended for?

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  • G = ground => for STP (Shielded Twisted Pair) Most common use is unshielded. Mar 16, 2016 at 19:57

3 Answers 3

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There is nothing wrong with your tester.
There are 8 strands in an unshielded network cable which is what you tested in your video.
A shielded cable also has a grounded metal sheath surrounding the 8 strands. The G on your tester refers to this.
I have a similar tester but in mine the shield is referred to as "Shield".

5
  • G refers to metal sheath? If so, why it does not blink?
    – Boris_yo
    Sep 30, 2011 at 18:34
  • The cable in your video doesn't appear to have one, it's unshielded.
    – Tog
    Sep 30, 2011 at 18:36
  • There is nothing wrong with that, it is a perfectly valid cable type.
    – Tog
    Sep 30, 2011 at 18:42
  • Oh i got it now. I was slow back then.
    – Boris_yo
    Oct 2, 2011 at 21:09
  • I was curious how the tester would even test this, since there's only 8 pins on the RJ45. A shielded cable requires a connector with a metal wrap like this for the shield to connect with, and the tester in turn has a contact for the metal wrap on the connector: i.stack.imgur.com/Pju2u.jpg
    – AaronLS
    Jan 24, 2017 at 5:01
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In my CHL-468 tester, the G position is not populated by an LED. I actually soldered in an LED and got it to work.

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I also have a cable tester (test connect and speed) : some cables succeed in testing the G, some not (no light at all). Both sort of cables works well. All are 5e quality (supposed to support 1000 mbps). The difference is the lateral of the plug : metal = G present. Plastic = G (ground) not present. The cables with ground are protected from outside induction influence, and are really more "safe". Chat GPT consulted = cables with ground are much more better, and should always be used.

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  • Please don't send answers based on ChatGPT. It can be very wrong at times. Include some additional source(s) confirming your theory.
    – Destroy666
    May 9, 2023 at 13:09

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