I have just bought one of these: Ultra High Speed ADSL Cable 5m to move my router from the hall into my living room.

Before and after I installed it I did a batch of speed tests. I was getting 75-80 Mbps which is as high as it has ever been so I assumed that the new cable had not degraded my connection at all.

Today whilst working from home I have noticed the remote connection not responding a few times so I set up a ping to my ISP's first hop and sure enough I was getting more missed packets than I would expect. (I was also pinging my router over wifi and basically got no lost packets there so I can assume that the packets are going missing between my router and my ISP - implicating the RJ11 cable or something external to the house).

When I was running the cable I forced it under the skirting board to go round a door. This was a tight fit and I had to use a relatively large amount of force to squeeze the cable in there.

I have now pulled the cable out from this point and I do not seem to be dropping any packets.

Is it possible for a cable that is squeezed to provide a poor network connection then for it to "recover" when it is no longer compressed? I can't see how the physics here would work. Surely if the cables are still properly insulated it wouldn't matter if they are squeezed!


  • Unfortunately, questions about home networking and consumer-grade devices are explicitly off-topic here. You could try to ask this question on Super User.
    – Ron Maupin
    Jan 27, 2017 at 16:12

2 Answers 2


With balanced twisted pair cables running at high frequencies, like for data, untwisting the pairs can have a detrimental affect on performance. Squeezing a cable will spread the twists out. There are problems if you exceed the pulling tension of minimum bend radius, and you can permanently damage the cable.


Yes, it may affect network speed. When cable becomes squeezed, it becomes a little hot and affects speed.

  • 1
    Squeezing twisted pair makes it hot? Please elaborate. Jan 27, 2017 at 15:41

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