The internal cables that link the DP to the NTE are not in a duct, they run in a "void" that is also occupied by other services.

I suspect that all the internal twisted pairs may have been installed by the builders electricians, but can't be sure of that.

The main incoming cable is all underground, from MYSEA to here.

That makes sense. It was just if they were in a common duct, they would be closer together. In a void I'd expect a bit more separation, although I guess it's not guaranteed.

If noise was particularly bad you might expect to see a high target SNR margin with a lot of variability.

It really is a complete mess. the internal telephone cables are entwined with mains power cables.

Lots of internal interference due to LED lamps, switch mode power supplies etc.

I have a fixed 6dB S.N.R.M. interleaved, DLM disabled.

It is the only way to reach the dizzy heights of a 1.5Mbs sync. speed.

There is a considerable amount of electrical interference in the building, as checked with a M.W. radio.

Noise on an MW radio does not always equate to noise affecting ones ADSL connection. What do your router stats look like ?

It does when it peaks near enough to 600 kHz. The hallways are lit by LED lights, and the amount of electrical noise they create is deafening.

I can trace the electrical wiring in the voids by following the approx. route with the radio.

Stats, I can just about hold 1.5Mbs @ 6dB SNRM as I am now.

Line attenuation is >72dB (down)

All this brings me back to my original query....running better quality twisted pair, physically distant from the electrical cabling.

In reply to a post by Brunel:

The hallways are lit by LED lights, and the amount of electrical noise they create is deafening.

My brother lives in a communal dwelling where these have just been fitted. It's virtually killed his already flaky dsl connection. His nte is also fed from a communal dp and trunked along with other services.

Edited by deleted (Mon 12-Oct-15 08:19:48)

If it is as bad as you suggest then it is likely to have a large element of radiated RFI as well as conducted. Moving the cabling in that case is unlikely to have any effect.

Changing from CW1308 to Cat5e - the difference will be small, if any.

Rather than try to reduce the effects, you should be tackling the problem and finding out why the lights are creating so much noise - they should not. I have LEDs lights within 50cm of my modem and the incoming line probably passes even closer - with NO discernible effect.

72db attenuation !!! 1.5 meg at that is indication of an already very decent pair.

The hallways are lit by LED lights, and the amount of electrical noise they create is deafening.

I can trace the electrical wiring in the voids by following the approx. route with the radio.

As I said last night, just because it makes a racket on the radio does not mean it affects broadband service, I have a fair bit of experience in this sort of thing, take your radio into other flats, or the office where you work, it'll be deafening in there too I daresay.

It is, I am now convinced that the way forward is to try for fibre broadband.

What originally sent me down the route of a better quality connection from DP to NTE, was the OR tech. stating he could obtain a higher speed at the DP

Just to put a few figures to that. He was checking in an apartment that is the furthest away from the DP, 3 floors vertically above.

Speed obtained at the NTE 0.7 Mbps, speed direct at DP 2.2 Mbps a considerable increase.

Speed obtained at the NTE 0.7 Mbps, speed direct at DP 2.2 Mbps a considerable increase.

I'll agree that is a pronounced difference.

The stats I was hoping to see were those from your router, showing error counts and such like.