Yes there are lots of wires. Blue, brown, orange, white with various colours marks on them etc. They are protruding from the main cable coming into the house. I do have one telephone point with a face plate. I unscrewed it from the wall to see if it was actually wired up and it is. Also I have a point at my alarm. With HH5 connected to master socket with splitter these lines/telephone points do not work. As I stated before, all other points x2 don't even have a faceplate for me to test.

Can you get pictures of the master socket, just the faceplate and up to the test socket.

You can use an image upload site and share a link here.

I just want to be sure.

Master socket with wiring

Here is a photo. The white cable with wires go to the rest of the house. None of these wires are connected to anything.
The only wires connected to anything are the blue and white wires coming from the outside cable, they connected to A&B on the master socket respectfully..

Here is another photo.

Master socket with wiring.

In reply to a post by Speedchaser:

Yes there are lots of wires. Blue, brown, orange, white with various colours marks on them etc. They are protruding from the main cable coming into the house. I do have one telephone point with a face plate. I unscrewed it from the wall to see if it was actually wired up and it is. Also I have a point at my alarm. With HH5 connected to master socket with splitter these lines/telephone points do not work. As I stated before, all other points x2 don't even have a faceplate for me to test.

I struck out part of my earlier post when I thought you have no extensions wired up. Please can you try the phone in the one that is wired and has a faceplate, as originally requested ?

Ok, that section of the master is BT property, so do not touch that again, but really useful to see it.

It is wired correctly, this means the test socket should be working just fine. Are you able to try again with a different filter? BT provide 2 with the HH5 if I remember correctly.

The test socket, to clarify, is the socket connected to this faceplate

https://picasaweb.google.com/lh/photo/oe7NdrOB3JBKJp...

You see the rectangular socket on the otherside of this...

Now what does concern me is the significant amount of rusting on the master socket backplate, this does suggest water is getting into the socket which could be the cause of slowdowns.

I did get the filter to work in the master socket. Only thing I did different to allthe other times was turning my hub off for 40min before retesting.

I did test the phone in the telephone point with the faceplate. This was when HH5 was connected visa adsl filter to main socket. (I also checked the telephone point was wired at the back and it is) Telephone would not ring out or receive calls. This makes sense as there is nothing attached to the master socket/faceplate layers other than the two wires from the outside line.

In reply to a post by ukhardy07:

Now what does concern me is the significant amount of rusting on the master socket backplate, this does suggest water is getting into the socket which could be the cause of slowdowns.

Its not rust its plaster!

Ok the setup seems ok. Would ADSL be faster for you than VDSL perhaps?

At current you are sycning at around 7.5Mbps which isn't too bad.

Just to check, between the master and the HH5 there is not a long extension cable?