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(Please excuse me if I use the improper terminology; I'm an amateur who knows enough to be dangerous, but not enough to really be useful)

I'm setting up a home network and am having issues with getting all of my wall plates to work. I have 6 throughout my house located in strategic places, but only one of them is working.

I've verified that it's a cable problem, because I can plug my laptop directly in to my switch and access the network, but if I go through the wall plate, I don't get any connection.

However, I'm reasonably confident that everything is wired correctly (568B), because I've used a tone generator on both ends of each wall plate cable and see the lights come on in the proper 1-8 sequence, with no skips, just like it does with the wall plate that does work.

I'm at a loss as to how I should diagnose the issue further. The wiring seems to be correct on all the wall plates, but only one is actually working. Where should I be looking next?

  • Unfortunately, questions about home networking are explicitly off-topic here. You could try to ask this question on Super User. There is far more to a proper cable installation than electrical connectivity, and a proper cable tester costs several thousand dollars. – Ron Maupin Jun 20 '16 at 21:16
  • Sadly, home networking is off-topic here. You can try asking on Superuser.com – Ron Trunk Jun 20 '16 at 21:16
  • @RonMaupin respectfully I disagree. The question is only incidentally about a home network. This is a question about how I diagnose a problematic Ethernet cable. If it makes you feel better, I work from home so I could just as easily replace all instances of "home" with "work" 😜 – Dave DeLong Jun 20 '16 at 21:41
  • If you must ask that question, you don't have the knowledge or tools to properly do this. A proper tester will tell you where the cable is failing. You can permanently ruin a cable with too much pulling force, or having it kinked at one time. Home networking is off-topic here because you don't have the correct information to tell us if The primary tests are: Wire Map, Length, Insertion Loss, NEXT, PSNEXT, ELFEXT, PSELFEXT, Return Loss, Propagation Delay, and Delay Skew. You need to determine which is/are out of spec. Questions about home networking are explicitly off-topic here. – Ron Maupin Jun 20 '16 at 21:48
  • If you disagree, you can always bring it up for discussion on Network Engineering Meta. It's possible that, like often happens in home networking, the cable was stapled to the studs, as is required for power and telephone cables. That will cause a data cable to fail the necessary tests. In any case, the questions is not about "professionally managed networks in a business environment." – Ron Maupin Jun 20 '16 at 21:52
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You are very likely missing a connection on one or more of the eight wires needed for gigabit ethernet or perhaps two are "swapped" i.e. in the wrong places. You could use primitive technology like a multimeter on ohms/resistance function but I would highly suggest borrowing or renting a simple tester. You send a signal through the conductors on one end (battery powered) and the receiver lights up if/when each conductor is connected correctly. https://www.amazon.com/HDE-HDE-H11-Network-Cable-Tester/dp/B000P1OA1O


If you want to shoot from the hip, remove and re punch down all your conductors at the female end and/or crimp new male ends on (if you have done that part yourself - if not, leave them be). Remember, there are two standards - 568A and 568B. Be sure you're using the same standard at both ends of each cable!

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