What an excellent business plan!!

[#1]

Quote from: Oldjim

Just one other thing. As I was concerned about the reported attenuation I asked James to run a woosh test and it has given exactly the same results as the router. Thanks to James for a very speedy response

Yes add my thanks to James for that, i have no idea what it means but thanks anyway, does it make us any nearer the solution?

[#2]

It just means that I checked your line stats, Sunny.
Jim was concerned that your router was reporting some random numbers.

[#3]

Quote from: Oldjim

As things are looking better from the error front can you advise if you sent or received any faxes. If not is it possible to do so and see if there are any effects

No faxes sent or received since Dec, nothing connected now except modem/router.

[#4]

Quote from: HPsauce

Can you describe how the various cables run and what is connected to what please.

You have a master socket in the loft. I can see it has a black cable - is that the incoming BT line and is it connected to 2 screw terminals on the back side of the master socket baseplate (the bit with the BT&piper logo)? Yes with orange and white.
It appears to have 2 (one above?, one below) brown cables - are those connected (2 each of orange and white) to the removeable faceplate?
Where do they then go? One goes to living room ext, nothing connected the other to the junction box. Two from junction box, one to study and one to a bedroom, not used. Only two wires coonected to faceplate from each ext.
I have now moved the M/R downstairs again and rebooted the modem, attached is the telnet summary when connected. The noise has dropped back to 6 and the sync speed has risen. I cannot get R/S telnet to show me the router statistics though.

[#5]

You will need to enable debug mode again then change the default noise margin to 9dB. As I said earlier rebooting the router clears all that

[#6]

Quote from: Sunny

It appears to have 2 (one above?, one below) brown cables - are those connected (2 each of orange and white) to the removeable faceplate? Where do they then go? One goes to living room ext, nothing connected the other to the junction box. Two from junction box, one to study and one to a bedroom, not used. Only two wires coonected to faceplate from each ext.

I'd recommend simplifying that (a lot). Will post later, going out now.

[#7]

as a bystander, I am intrigued how does the junction box with the three brown wires get their feed from the master socket

[#8]

As he said, brown cable from Master to JB. Then 2 cables from JB to study and bedroom. 

[#9]

Quote from: Sunny

One goes to living room ext, nothing connected the other to the junction box. Two from junction box, one to study and one to a bedroom, not used.

OK this is what I'd do assuming all your equipment (phone and ADSL) is in the Study, you may think it's too brutal:
Option 1.
Disconnect the cable to the living room inside the master socket (easy)
Disconnect the cable to the bedroom inside the JB (cut all 4 wires, but leave enough either side of the cut so that it can be reconnected)
Fit a filtered extension faceplate in the study https://secure.adslnation.com/products/xtf.php
Fit an inline filter on the phone/fax so it is double-filtered
Option 2.
Fit a filtered faceplate in the loft on the master socket http://www.adslnation.com/products/xte2005.php
Disconnect the cable to the living room or (if you must) connect only 2 and 5 to the faceplate filtered connectors
Connect the cable to the JB (only 2 and 5) to the unfiltered connectors on the faceplate
Disconnect the cable to the bedroom inside the JB (if you need the bedroom later reroute the cable to the filtered connectors on the faceplate)
Fit a filtered extension faceplate in the study https://secure.adslnation.com/products/xtf.php
Fit an inline filter on the phone/fax so it is double-filtered
In option 2, if the cables are long enough and can be rerouted to reach the ideal setup is to bypass the JB:
Study cable on the unfiltered terminals (plus faceplate etc as above)
Living room cable on the filtered terminals (or not connected)
Bedroom not connected or on fitered terminals
With modern DECT phones you can probably disconnect all the wiring except the one to the study.

[#10]

Here is the latest summary attached noise levels gone up now to 12.2. Modem is no longer on Master socket.
Latest from Plus support "I have passed this case back to BT as a dropping connection issue as this would now be the primary reason why the speeds are poor. Once the line remains stable, hopefully the speeds will increase. If they don't then we will go back to BT again as a speed fault. We will keep yo updated.]

[#11]

Did you use Routerstats to change the default noise margin
I bet you didn't and as the fault was reported BT have upped it to 12dB

[#12]

Quote from: Oldjim

Did you use Routerstats to change the default noise margin I bet you didn't and as the fault was reported BT have upped it to 12dB

Yes I did as attached.

[#13]

In which case BT has increased the default noise margin to 9dB
You can either resync the router or use Routerstats to change it to the default by putting 9dB in both boxes

[#14]

Oldjim , I have just rebooted the router and posted the stats for you to advise, noise is showing 9.3 now without me forcing it.

[#15]

You need to be very careful how often you reboot or disconnect.
I'd try to keep it to 1 or 2 per day or BT's systems may start kicking in.