Telephone wiring problem

[NewOrder]

I am a computer engineer and got called to an address with no internet access. I removed the front plate of the master socket but as I did this I notice only three cables were connected to the front plate, one of them was loose not connected to anything.

I connected the router to the test socket and sure enough it worked. The problem is another wire also fell out, so I don't know what the correct wiring diagram is to put all the cables back.

What I do have is this:-

3 - Orange White
5 - White with a blue stripe.

I have wired a couple of extensions in my own house before and do a lot of CAT5 wiring but I don't know what order to put back the two wires which fell out (and hopefully the cause of the problem).

Thanks in advance.

 

[sparkymarka]

blue with white needs to go to 2 you only need 3 wire for extension 2 and 5 and 3 for bell

 

[NewOrder]

There is another expension on the top floor too, which is confusing but thanks I will reconnect that wire and see what happens. I think I probably have to get my telephone engineer out I usually use in this situations like this but if I can fix it all the better.

 

[xr4x4]

Only need to connect to 2 and 5, doesn't matter which way round.

As long as the phone plug socket has the yellow blob in it (capacitor I think) it will ring without the third wire.

 

[bernardgreen]

Only need to connect to 2 and 5, doesn't matter which way round.

As long as the phone plug socket has the yellow blob in it (capacitor I think) it will ring without the third wire.

That means you will have two master sockets on one line. Not recommended as it can degrade the speech quality on a long line and can appear as a line fault during line testing. And some capacitors are grey, white or blue depending on manufacturer.

 

[TicklyT]

Only need to connect to 2 and 5, doesn't matter which way round.

As long as the phone plug socket has the yellow blob in it (capacitor I think) it will ring without the third wire.

That means you will have two master sockets on one line. Not recommended as it can degrade the speech quality on a long line and can appear as a line fault during line testing. And some capacitors are grey, white or blue depending on manufacturer.

Multiple master sockets on a single line can also do for broadband speeds roughly what myxomatosis does for rabbits. That may even be at the root of the problem the OP is trying to solve.

 

[xr4x4]

doubt it, ive seen it been done and done it that way for years with no problems for broadband or phone.

 

[TicklyT]

doubt it, ive seen it been done and done it that way for years with no problems for broadband or phone.

Yes, it can work.... for a while.
Have you ever checked the DSL line speeds after an installation has been running for a few days, and noticed the speed has dropped from it's initial rate as the router and DSLAM try to stabilise the excessive error rate it creates?

I frequently had the 'pleasure' of trying to tidy up such poor installations where an initial 2 Mbit speed had dropped, sometimes to as little as 128Kbit. I don't think the customers liked getting billed for the time we spent doing it either.

 

[SimonH2]

Don't forget that a lot of phones these days don't even use the bell line - having been made for "2 wire" systems. The main reason we have a 3 wire system is because we had pulse dialling for so long - the separate bell wire allows a pulse dialling instrument to short it during dialling to avoid bell tinkle.
Even with pulse dialling, a lot of electronic ringers had anti-tinkle built in - again because that was required for the 2 wire systems common elsewhere in the world.