In reply to a post by RobertoS:

Edit - AH I didn't spot the hijack of the thread
/edit ****************
I think you are getting in a tangle . This post may be useful to the OP though.

The data extension cable when provided is used to provide the VDSL socket up to 30 metres from the master. In effect, the master is moved. Do you need a phone socket where the master is now? Most engineers are able to provide that as well by back-feeding from the new location, usng spare wires within the data extension.

Or in your case there would be the option to install the data extension cable and use the existing extension wire in the opposite direction. Gets a bit bulky though.

The VDSL socket has a built-in filter. The installation looks like the pic on this page, with the modem plugged into the top and the phone into the bottom.

I believe the engineers have been told to wall-mount the modem if possible, to optimise its cooling. Will that be an issue?

Thankyou for this, I have had a filtered faceplate fitted to my master socket for the last 8 years and an extension provided by Openreach to take the dsl signal through to the back room, I presume that this ill be replaced with a new one. The system works well. My query was about just what the extension cable they provide now is like and the confirmation that it is
the same cable I already have fitted works for me. When the openreach engineer comes out he can put the modem either at the back of the house on the end of the extension or in the living room by the master socket, I can cope with either, but I will ask that he does not fit it to the wall so that when he has gone I can try both ends to see which suits me best. If he is not prepared to do this I am fine with that, it will go by the master socket and I will buy a modem from eBay so that I can play around with positions or myself, I would even be happy to suggest that he leaves it loose and I will fit it to the wall when I find the optimal place for it.

In reply to a post by Bill_Lord:

I would even be happy to suggest that he leaves it loose and I will fit it to the wall when I find the optimal place for it.

you may find your Openreach engineer doesn't want to fit to the wall, mine didn't!

They don't have to wall mount it. It arises from the early Huawei HG612 ones, not the HG612 v 3B. The early ones tended to overheat when horizontal, though mine and many others were fine.

The 3B apparently fixes the issue, but the recommendation is still given to the engineers. OR, sensibly, don't want to have to send an engineer to replace modems that have melted bits inside.

I don't know how the ECI modem behaves.

At my last install, in early January, I had to actively dissuade my engineer from wall-mounting. I had to show him the piece of wood I was going to mount it on instead, and promise it would be vertical!

I had to actively dissuade my engineer from wall-mounting

The mind boggles .