what is upstairs and is it all filtered.

Were all of the results with the router plugged into the ADSLnation faceplate ?

Just to be clear and hopefully prove I do know what im doing, 2,3 and 5 are filtered connections and therefore only voice will work and no need for filters.
A and B are unfiltered and so the ADSL signal as well as voice can pass, but need a filter at every socket.
With this in mind, Ive connected my extension for upstairs (white cable) to A + B on the adslnation master faceplate and the extensions for downstairs to 2,3 and 5. Upstairs I only have 1 extension socket with a filter plugged in separating my phone and ADSL connection.

With this setup, no matter if I plug the router in at the master adslnation faceplate or upstairs filtered extension socket, I still get 9mb. At the master, if I just disconnect A and B, I get 15mb from the main adslnation faceplate (with downstairs extensions connected to 2,3 and 5).

This is how my master looks right now.
http://pic0.picsorlinks.com/ph_or_36677_433084d.jpg

From the pic it looks like you have the ring wire connected in the white cable. Remove the ring wire (orange / white), not required as the filter will provide the ring circuit.

No, its coming from the black cable (downstairs extentions).
The white cable is only plugged in to A and B.
Blue with white in B
White with Blue in A

Ive also tried swapping the wires in A and B with no joy.
Tonight, im going to try the Black cable in A and B and White cable in 2 and 5 to see the results.

so either the white cable, or the stuff on the other end of it, is picking up interference or causing some other issue. What's the whole story of the white cable - does it go to a single socket or .... ?

Yes it does, to a room upstairs. Its the only extension upstairs.
That extension has a filter with a Phone, Router (hopefully) and Sat Box.
I remember my alarm has a tel wire too. Ill need to check the main box for the alarm to see if its connected to white or black.

sat boxes are sometimes the problem - try the white cable with only the router on the end.

still only getting 9mb after disconnecting the sat box and phone. will try exchanging the 2 cables at the master to see what that does.

In reply to a post by hittyh:

still only getting 9mb after disconnecting the sat box and phone. will try exchanging the 2 cables at the master to see what that does.

tried this. no matter which cable is using A and B, the speed drops to 8-9mb both at master and at extension.
If I unplug A and B and only use 2,3 and 5 at master, i get 15mb.

The filter is working, but the unfiltered connections are being restricted.
based on this Im sure the adslnation is either faulty or not compatible with my setup.

ive seen on other forums people having luck with the pressac plate from Clarity. Anyone here had any joy with them?

You will get identical results with any faceplate as the A&B terminals are simply unfiltered direct connections to the incoming line.