Re: Ping kráftéé ? Advice needed to trace wiring fault.

kráftéé wrote:
Howard Neil wrote:
Tomorrow, I am going to try to help out a neighbour and attempt to
trace a wiring fault. I could do with any suitable advice before starting.

The situation is this:-

He has just been enabled for broadband but could not connect and asked
me for help (not that I know very much).

He has two telephone extensions leading from the master socket and his
computer is using one of them. He is using a router but the DSL light
was not showing.

When the router is attached to the test socket of the master socket,
the DSL light comes on. When the router is plugged into the front
plate socket of the master socket, the DSL light stays off. I therefore
presume that there is a fault in his extension wiring.

What I propose to do tomorrow (please correct any mistaken
assumptions) is:-
Expose the connections at all of the sockets, run a length of spare
wire (bell wire) between them and test each telephone wire for
continuity (using the bell wire for the return path). This, I hope,
will show where the fault is and enable us to correct it or re-wire
as necessary.
Any comments/suggestions are welcome, please.

Shouldn't be neccesary to do continuity test. It's simple, does a telephone work at each socket? If yes you have got continuity.

Things to look for..

What type of cable have the extensions been run with? Is it twisted pair, burglar alarm cable(no twists, no pairs & the conductor is stranded) or the flat extensions which everybody & their dog appear to be selling. If it is twisted pair go to the next pointer, if not give up now & start thinking laterally...

If it's twisted pair ensure that it's not been connected split pair, in other words the blue white with white blue, orange white with white orange, if you get my drift, & the connections you should use are 2&5 (one pair) & (if you are going the whole hog & doing it properly) another wire connected to 3. There maybe other connections available but they aren't used in this scenario. Older cables may have colored markers & a white to make a pair, but you can find out the pairing if you look at the twists. Newer installs may have used colored leadin in this case it's white & orange, black & green.

Make sure that all equipment is filtered (yep even the Sky digi box which a surprising number of end users forget) this includes any extra tele bells or even burglar alarms (which is another one which end-users appear to forget).

If you've done all the above & it still is not working then try removing the bell wire, pin 3, see if that makes a difference.

If you're still got problems make sure that all connections are good & tight (have known more than a few cases where the problems have been caused by faulty/loose terminations on the extension wiring).

After that mug a passing DSL engineer & feed him tea & biscuits until they've fixed it, but seriously though, it is a logical progression which you just have to work thru. there may be problems with the extension wiring which have been there ever since day one & you just have to work your way thru checking quality of cables, connections etc & just because you only get 2 filters in the box doesn't mean that you only filter 2 things, you have to filter all equipment (yes I have been called out more than once to people who thought like that as well).

Thank you very much for the reply. I don't yet know what type of cable has been used. I do know that the telephones work on all extensions but they have had intermittent problems with them over the years (problems that then clear up on their own or are blamed on equipment such as the answer phone) so it may well be an old fault.

I have printed out your suggestions to take with me (in case I forget anything).

I am very much obliged.

--
Howard Neil
.

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