Re: Strange Wiring Configuration?????
- From: "Roger Mills" <watt.tyler@xxxxxxxxxxxxxx>
- Date: Thu, 19 Apr 2007 11:33:38 +0100
In an earlier contribution to this discussion,
JW <jw@xxxxxxxxxxx> wrote:
Peter Fisher wrote:
I think i might have a longstanding wiring configuration thats not
helping me cure an internet connection problem i have (constand
dropping of connection, wildly varying speeds, etc.......the usual
problems people get with internal wiring problems, i suspect) Can
anyone knowledgable tell me if this seems correct.......... Going from
the phone backwards as it were the wiring is as follows:
The phone is connected to a linebox (which, for the purpose of
trying to cure above problem, i have the phone and internet
connected directly into the test socket, at the back of faceplate,
with filter) Then, there is a short cable of about 40cm leading to a
junction
box. The junction box (just above the skirting board) then has, not
one, but TWO cables coming out of it which run under the carpet
along the room wall to 2 downstairs extensions, which, because i am
connected to the test socket are dead. I also have a long disused
extension going upstairs, which i suspect
is the one giving me the problem, as the cabling for THIS extension
seems to go from the rear of the junction box, and through the
outside wall, then up the outside of the house, and into a bedroom.
I took the cover off the junction box just now, and there are three
connector blocks inside, and a jumble of wires that i felt i should
leave well alone. Would this "rogue" extension be the cause of my
problem, in as much
as it might still be "live" even though i am connected to the test
socket? I cant plug a phone in to this upstairs connection without moving
a
lot of heavy and fitted furniture, so i cant see if its live or not,
tbh
Won't the "rogue" extension also be dead with the master
socket faceplate removed?
The master socket will usually accept only one, or at most
two, cables on its terminations. That will be why a
junction box was used. As long as the faceplate's off, all
the extension wiring should be disconnected.
That's certainly how it *should* be - though not necessarily how it *is*.
To the OP: How many terminals are there, and in use, in the junction box? If
it has been done properly, there should be at least 5. Two of these will be
for the incoming pair, and will connect it through to the A and B terminals
in the fixed part of the linebox. The other 3 will be for the extension
wiring, and will go - in one direction - to the back of the removeable
faceplate at the linebox and - in the other direction - to the extension
sockets.
It is just possible that the upstairs extension could be connected to the
incoming pair rather than to the wires coming back from the faceplate - in
which case they could be acting as an aerial and picking up a lot of noise.
If you can identify this cable, I'd disconnect it at the junction box in any
case, if it's no longer needed.
The other thing to check is that the cable carrying the incoming pair
between the junction box and the linebox is actually using a twisted *pair*
of conductors, and not just any two conductors taken at random from a
multi-core cable. If it *is* a pair, both conductors will use the same
colours - e.g. blue with white, and white with blue.
--
Cheers,
Roger
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- References:
- Strange Wiring Configuration?????
- From: Peter Fisher
- Re: Strange Wiring Configuration?????
- From: JW
- Strange Wiring Configuration?????
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