In reply to a post by oldperson:

My connections from the modern BT socket are:
1 a filter with one wire direct to the internet hub and

2 a connector with a wire to the SKY Box as part of it -

3 another connector (which goes into connector 2) which has a wire to the phone and an external connection wire leading to 3 connected diy upstairs extensions

I don't quit follow that. You seem to have three connections to two sockets.

If you have a faceplate with two sockets, what is plugged into the ADSL socket and what is plugged into the phone socket?

If you just have a single socket then I assume you have a dangly filter. So just as above, what is plugged into each of the dangly filter outlets?

Are you saying you are using splitter plugs and free-standing extension cables? That is a recipe for the sort of problem you have.

Should be OK going through the phone side of one filter, but it is worth checking with the Sky box unplugged, as rare (but worth mentioning) that some people have had problems with them, in which case adding a second filter to the sky box can help.

I have a faceplate with a single socket.

Into that single socket is plugged an ADSL filter with 2 outputs:
one with a wire direct to the Hub;

the second output has a socket plugged into it which has a hard wire connection to the SKY Box (via a single connector just before it enters the SKY Box).

Into the socket used for the SKY Box wire connection there is another socket which has 2 outputs - one the wire to the phone, the second is a hard wired wire leading to the extensions.

Summary: there is a single socket, then an ADSL filter, then another connector (to the SKY Box), then another connector with the phone and extensions' wire.

In reply to a post by RobertoS:

Are you saying you are using splitter plugs and free-standing extension cables? That is a recipe for the sort of problem you have.

Don't think the splitter is a problem. I have always had a splitter on the phone side of the filter, leading to a phone and my PC's (fax) modem. It's the DIY 3 x phone extension that worries me.

In reply to a post by oldperson:

the second output (of the filter) has a socket plugged into it

Would you say that the socket of this post = the connector of your previous post = what most people would call a (2-way) splitter?

Yes, I was referring to the whole setup. I too used to use a 3-way splitter, at one time I think a 4-way. It just has to be used correctly and the poster's setup looks decidely dodgy with the various cables around.

I've even had dial-up and broadband in use simultaneously. Subject to only having two hands to type with.

There's a lot of noise getting onto the OP's line as a result.

Nope. Can't picture it. But overall it is bad because of the extension cables if nothing else.

Are you talking aboout this kind of thing? If so, what does it plug into and what plugs into it?

What is the single connector near the Sky box?

What do you mean by a hard wire connection to the SKY Box? The only thing that seems to be hard-wired is the back section of the master socket. Everything else is plug-in. Or do you mean there is a plug into the phone socket of the filter and that plug has an extra socket and you have a 2-way splitter into that?

"Into the socket used for the SKY Box wire connection" - where is this? At the master socket end or at the Sky box end?

Any chance of uploading a photo or photos?

In reply to a post by RobertoS:

Can't picture it.

Pretty sure he means:

Master Socket -> Filter -> Router Cable + Doubler -> SKY Cable + Doubler -> Phone Cable + Phone Extension Cable leading to 3 remote phone extension sockets.

"hard wire connection to the SKY Box" = an extension phone cable leading to a extension phone socket ("via a single connector just before it enters") near the SKY Box.

In reply to a post by XRaySpeX:

In reply to a post by RobertoS:

Can't picture it.

Pretty sure he means:

Master Socket -> Filter -> Router Cable + Doubler -> SKY Cable + Doubler -> Phone Cable + Phone Extension Cable leading to 3 remote phone extension sockets.

"hard wire connection to the SKY Box" = an extension phone cable leading to a extension phone socket ("via a single connector just before it enters") near the SKY Box.

Then what's causing all the noise on the line?

In reply to a post by BatBoy:

Then what's causing all the noise on the line?

That is!