With the main lights off there is another source of interference from all the emergency lights.

These days we are surrounded by electrical noise, power line adapters being the main culprit.

Which will hang in there better than most.

It used to, but now because there is no control of the connection mode it connects at ADSL 2 which makes it unstable.

I can only connect at GDMT for a stable connection.

A direct comparison should show the difference - if there is any.

Can't you disable the ADSL2/2+ in the GUI, rather than wanting to select?

Not on the 2wire

I can on present router of course.

Alas at those line lengths getting attenuation data that is accurate will be difficult.

But if the wiring is snaking around then another couple of hundred metres of twisted pair will account for some of the speed drop.

One option we've not mentioned would be to get the master sockets relocated to the comms cupboard, and then using existing wiring to run filtered wiring to the flats and add Ethernet cable to take the signal to each flat with a switch and wireless access point in each flat. £125 per master socket relocation in theory, but if done in bulk order a discount may be possible, running the Ethernet and extra broadband hardware will cost. Ethernet signals are more resilient to the noise and not just because of the cat5e structure.

In reply to a post by MrSaffron:

Alas at those line lengths getting attenuation data that is accurate will be difficult.

Even without the attenuation figures the SNR and sync speeds would show whether there is a noise issue.

You are right about moving the master - however there always seems to be resistance to this from both BT and the end user as it leaves both their router and phone line open to abuse.