we have a problem with our internet connection. it is not stable and not as fast as it can be... Our provider suggested we contact an electrician to " break" (?) The bridge tap. According to him, it can help. Before I contact an electrician, I wish to understand a little bit about that and to be sure it makes sense? Thank you for your help!

  • Hello, and welcome to Stack Exchange. We'd need more information: what type of provider do you have (cable, fiber, DLS)? Who's your provider? Where are you? Commented Sep 17, 2016 at 14:53
  • hi, we have a DLS and we are located in switzerland. the thing is that the connection was fine and suddenly it is bad. and the internet provider cannot explain it. they suggested we contact an electrician to take care of the "bridge tap".... i was trying to look for some information on the internet but didn't find anything... thanks !
    – Daphne
    Commented Sep 18, 2016 at 15:48
  • ... whoops... I meant "DSL", and I'm guessing you meant the same... Commented Sep 18, 2016 at 16:25

2 Answers 2


The bridge tap basically just means that you have your DSL modem connected to a pair of phone wires that also branches off to (probably) other jacks in your home. All of those jacks are "bridged" together. This could literally be crimped or twisted connections inside your walls, or you might have a wiring closet with more structure, such as all the wires screwed down to posts on a bus. This is presuming that you're not on a party line and don't have law enforcement or a nosy neighbor physically tapping your phone line (humor?).

Have you recently plugged anything else into any other phone jacks in your home? If you have, then unplug it and see if your performance improves.

Even without other devices plugged into the extension jacks, a "bridge tap" can cause reflections echoing around on the wires which can interfere with the performance of your DSL modem.

What they're really telling you to do is to have a single, unbranched, dedicated phone line for your DSL modem (2 twisted wires technically, but I'd just think of it as a single thin phone cable).

An electrician or knowledgeable friend could help you with this. This is low-voltage, so the installer doesn't really have to be a licensed electrician unless your locality requires it.

  • thanks craig for your helpful and explicatif answer (-: i will try to find someone who has some knowledge with those "lines" and tap...
    – Daphne
    Commented Sep 20, 2016 at 6:30
  • hi , i'm still struggling with this issue.... to fix this bridge tap issue, is it in the house or outside normally? do you know where i can find photos or videos which might help? i have tried to look for on the internet and couldn't find something ... my husband is good with this kind of stuff and he has already tried to do some adjustments, but he is not sure as well what he is looking for. he looked at the lines in the house but it didn't give much. hope to get you help!!! thank you.
    – Daphne
    Commented Oct 22, 2016 at 11:34

Since you said the connection was fine and now suddenly is not, I don't think their suggestion is worthwhile. Even if it was it seems more of a phone company issue rather than electrician but maybe that's different in Switzerland. See https://en.wikipedia.org/wiki/Bridge_tap

I would suspect either your modem (and/or router if a separate component) has developed an issue (I've had several over the years that have degraded over time - possibly due to heat) or a phone line issue (I've had to have our line repaired at least twice in the 20 years we've been here). Could possibly be the filter used on the phone line but I've never heard of one of those going bad.

If you have not already done it, power off your modem and router. Wait 30 seconds and power on the modem. Once it has fully connected, power on the router. If that doesn't fix anything, see if you can borrow a friend's to test.

  • yes, i have tried all the basic solutions... and i have asked for a new modem. if that doesn't work, i will try the phone line lead you have given me....as far as i understood, the bridge tap thing might help the quality of the connection but has nothing to do with the stability of the line... thanks a lot for your help! cheers
    – Daphne
    Commented Sep 20, 2016 at 6:34

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