BT fitted ADSL master socket is it the right one ?

A cpl of years ago i went from 1mb to 2mb and kept dropping connections, so eventualy my ISP called an engineer round he fitted a new master socket with the filter, in my hall and gave me a 10m cable with a wall socket fitted with an RJ11 to fit into my loung next to the pc, to plug in my adsl modem and everything was ok.
Last week my O2 router was showing no adsl was coming into the house, so I thought I would plug it into the master socket, like everyone says to try, Thats where the problems start... The test socket is only wired with the 2 orange wires by a screw terminal each and the 2 blue adsl wires are straight to the RJ45 socket, shouldnt it be an RJ11 as there is no way to test the router ?
The master socket has BT ADSL V1 on it

RJ11 plugs fit into RJ45 sockets, RJ45 is the 8 pin version of RJ11.

Test socket should be like the one attached to the wall in this picture http://www.thinkbroadband.com/images/faq/faceplates/IMG_1346-crop.jpg

A photo of your socket will reveal exactly what you have. Removable faceplates don't have screw terminals to my knowledge.

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"The master socket has BT ADSL V1 on it"

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Sounds like you could have the original faceplate splitter which BT fitted on the early ADSL engineer installations.

Look at this page - is it the one marked "NTE5 ADSL Splitter V1.0 Part No: 6010705" ?

Are you sure it's an RJ45? Can you post photos somewhere? It should be a standard phone socket in which case you need either a converter from RJ11 to BT phone (some modem leads have a converter on them) or a ADSL filter which will give you an RJ11 output.

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RJ11 plugs fit into RJ45 sockets, RJ45 is the 8 pin version of RJ11.

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Did you mean to say RJ14 rather than RJ45?

All the RJ45's I see are physically larger than RJ11/14...
Wiki page on RJ (Registered Jacks)

If the OP has the old-type ADSL splitter used on the early engineer-fitted ADSL installations (and it sounds like he does), these have RJ11 connections for the ADSL and the BT phone jack for the phones. The BT engineer supplied him with an extension lead for his ADSL connection, with RJ11 connections, but this will not fit into the phone socket revealed behind the filtered socket. As another poster has suggested, he needs an adaptor to do this.

Edited by deleted (Tue 10-Jun-08 09:25:20)

Hi Zebedeee,
My comment was referring to:

" RJ11 plugs fit into RJ45 sockets, RJ45 is the 8 pin version of RJ11."

I don't think that's correct...

RJ45 and RJ11 connectors are modular this means that the smaller plugs will fit in the larger sockets, so an RJ11 plug will fit in an RJ45 socket. It is deliberately designed like that as in an office you have a structured cable set-up that has Cat5 cable and RJ45 patch pannels, Ethernet or phone can be run through the system.

I didn't realise that.
I've only heard of people getting RJ11/45's stuck in the wrong socket.

I've just tried fitting an RJ11 in to the RJ45 socket on a laptop - and it wasn't too happy going in and I didn't want to damage any pins - but then I tried an RJ45 wall socket and it fitted much better.

Could come in handy knowing that - thanks...

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"NTE5 ADSL Splitter V1.0 Part No: 6010705"

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Indeed, these are the early BT fitted splitters. Anyone with these should seriously consider replacing them as they are prone to both component ageing and dry solder joints.

When the BT engineer took mine out it fell apart in his hands. He fitted an ADSLNation box splitter (supplied by me) and the improvement in SNR was amazing. He had already removed the ring wire and re-organised the phone wiring so that the boradband socket was the very first in the house with all other phone lines distributed from a new distribution point after the broadband socket. I had also added new ADSLNation splitters to every BT socket. I reckon I got 3db SNR improvement for the ring wire and re-organisation and a further 3bd for the new broadband socket. Speed increase was 1meg.