Homeplugs?

You might be onto something there.
I do have some IP CCTV that hangs of some homeplugs.

Thank you Andrew.

That is a very good area to rule out.
I'll do some tests tonight.

Steve

There is no star wiring.
We gutted the house when we moved in & completely re-wired.
The reason the master is in the loft is that is where the BT cable enters the house.
The incoming cable is immediately terminated on the master.
No other wires enter or exit the back box of the master.
They only exit through the faceplate's two front sockets.
We have several phone extensions in the house, but they are split after the phone signal exits the front of the master.
The modem is plugged into the RJ-11 via an approx 1m cable.
All above board and done the right way, and I don't think I could simplify the wiring further.

I keep re-reading my post, and I still can't understand why people keep asking about my wiring. Can anyone point out what I said that wasn't clear. Did I use the wrong term for something?... or something?

Cheers

Steve

Yes Phil,

Spot on

Steve.

The faceplate supplied for VDSL by BT includes the filter as it has two sockets on the front. It is not 'unsafe'. It is the standard setup.

I was stressing that I _didn't_ use any sort of faceplate with punchdowns inside - so highlighting that my setup was very simple.

What I said _was_ relevant, as I had mentioned punchdowns (i.e. not using them) in my earlier description and it had caused confusion.

My link showed an example of what I was talking about and was meant to clarify, so we could move on.

>Not sure why you regard it as unsafe - trip hazard ?
>
It's more of a crawl hazard, as it's in my loft

In reply to a post by vdsl_steve:

I keep re-reading my post, and I still can't understand why people keep asking about my wiring. Can anyone point out what I said that wasn't clear. Did I use the wrong term for something?... or something?

Because your stats seem to indicate you're losing SNR Margin, which could be due to a wiring problem.

How far away from the master socket is the modem? Is it right next to it?
How does the modem connect to the master?

Any chance of some pictures?

Turn off everything in the house - all lights, central heating, hi-fi, microwave, homeplugs, &c &c.

Power up just modem and route and connect you PC - preferable a laptop on battery power. If you need to see what is happening or where you are, use a torch!

Get the bitloading graph and see how it looks and if you still have the dip then the problem is outside.

Turn on two or three items and then resync and see what the graph looks like - turn the items off and try some more. Eventually you will find a set which causes the dip so you then need to try those individually.

It can be slow and laborious but you do need to locate the problem.

Because many a time people claim to have tested - and then finally a photo appears and what they call the master socket is far from being that socket.

In short it is just the usual questioning covering the most common issues.

Modem is 30cm from master socket, connected by 1m long RJ-11 to RJ-11, supplied with modem.

I'll give that a go tonight.

I've been down this road before, having replaced some 12v downlighter HF transformers with a 50Hz toroidal one. This was when half my incoming pair had gone open circuit a while back. At that time, my connection was so flakey that the front door PIR turning on the outside light would disconnect my internet. But as I said, that was due to another BT fault which they fixed (when I was on ADSL, not VDSL).

I'll flip all but one MCBs and go from there.

Steve