The problem is that the cheapest, flat, flexible cables are the ones that are most susceptible to interference. That is a universal truth, and goes whatever the connector at the end - RJ11, RJ45 for ethernet, or BT phone connector.

Experience tells us that cheap'n'nasty BT extension cables cannot sustain ADSL signals for very long.

Experience also tells us that flat flexible RJ11 cables become more susceptible as they get longer - and 15M is quite long for one of those. Twisted pairs reduce the interference, but they are a rarer variety of cable.

Even ethernet specs only allow flexible-type patch cables to be a max of 30M when solid-core cable will take the signal 100M. And these are usually designed with twists on both types, with twists at different rates to also reduce crosstalk.

The VDSL2 signal will want to be kept on the shortest distance of the best quality cable, which is what the BT engineer will need to ensure.

Looking into it the RJ11 cable is more likely an 10m cable at most. It basically goes to the opposite side of the room to the master socket. So it's 10m at most.

Do you think this would be ok?

Is there anyway to find out if it would be ok?

just ask the engineer what he thinks, he can test at the socket and then the cable to check if it is a problem, but the best way is a short cable from the master or allow the engineer to run a data extension kit (which I believe is free anyway).

In reply to a post by Corbula:

That's what i'm wondering.

If the VDSL modem is connected to the faceplate with an RJ11 phone cable, why does it need to be next to the faceplate?

The current RJ11 phone cable is just a standard flat cable that goes to the back of the current router.

So could i not put the modem at the end of the current RJ11 cable about 15m away from the master socket?

We have been told that when the new kit is fitted, only to use what's suppplied..( remove all other leads etc.)

A new nte5 should be fitted and the rj11 in the new kit is used to connect the modem ( app 1m ). The modem is connected to the router by an ethernet cable, supplied with red ends, and is approx 2m long. After that the choice is for you to run an ethernet cable to your pc, OR ask the engineer to do 1 of 2 things...run a data extension kit or move the nte5 using ordinary telephone cable, to your pc's location. Don't forget the coffee !

The modem is connected to the router by an ethernet cable, supplied with red ends, and is approx 2m long.

Is that a BT Infinity HH you are talking about? We don't all go for Infinity .

Mine is an attractive medium-dark blue 1m ethernet cable with transparent plugs.

I'm not going for Infinity, but i'm not sure who i'm going with yet.

Personally i think the RJ11 cable i've got in place now would be ok, otherwise i've got a bit of a problem.

If the cable isn't ok and the modem has to go next to the master socket, the router will also have to go next to that. My pc doesn't have wireless though to connect to the router, it only uses cable.

Has the computer got a USB2 socket? (USB1 or 1.1 won't be fast enough).

I got a Buffalo Airstation Nfiniti WHR-G300Nv2 router off Amazon for £23.56 last week. (I didn't bother with the more expensive later model). That seems fine, and you can also get a Buffalo USB Wireless dongle for £17.71.

Just a thought.

Maybe not, but as 95% of fttc is infinity at the moment, I was responding to the original post as well...

At the moment i have a cable that goes from the ADSL/Modem port on the filter at the master socket to the back of my ADSL router in the 'Internet' port. When FTTC is installed, is this the same cable that will supply the new router?

The problem is the cable is about 15m long and goes behind a wall cabinet to get to the router next to my pc. The wall cabinet can't be moved so i wouldn't be able to get a new cable behind it.

Would it be the same cable for FTTC or does it use a different cable?

This is the fibre forum ???????

I don't see the relevance of your reply to my post about the description of the modem <> router ethernet cable. Your description is specific to one ISP and the OP replied to my same post and ruled out Infinity, 7 hours before this one of yours.

Your description of the cable was therefore inaccurate in general as I pointed out, (and I see you are not capable of spotting a correct but tongue-in-cheek hunourous post without it being made obvious - which rather defeats the object ), and wrong in the particular instance as seemed likely to me from the wording of the opening post.

When quoting another post by the OP, as you do in this case, it is conventional either to enclose it in quotes or the tbb forum quote box such as follows in a mo, or italicise it.

The reason for your final question to me

This is the fibre forum ???????

baffles me. That is the name of the forum, yes. Was my post inappropriate to here, or did it make you doubt I knew where we were?

In reply to a post by RobertoS:

Has the computer got a USB2 socket? (USB1 or 1.1 won't be fast enough).

I got a Buffalo Airstation Nfiniti WHR-G300Nv2 router off Amazon for £23.56 last week. (I didn't bother with the more expensive later model). That seems fine, and you can also get a Buffalo USB Wireless dongle for £17.71.

Just a thought.

If i had to go down this route, for the installation because they wouldn't put the modem at the end of the current cable. Would i just be able to move it afterwards?