House phone problems

[lil75]

I wonder if anyone can help me on this, I have always had a cordless phone, and all was well until I changed my internet connection to broadband about 6 months ago, ever since then my phone was just dead even after being charged all night, I would make or recieve a call and it would be bleeping after about 3 mins on the call then die on me, I have since brought a new phone and it is doing exactly the same thing, I have changed the batteries in it and left it charging....it was fine for about a week and now is doing the same as the old phone, I have contacted bt and they have checked the line and they say it is fine? They suggested I try a corded phone and the line is fine with that, but I want to use my new cordless!!! Any suggestions as to what it can be??? many thanks!

[ACtheTROLL]

you should have a master socket (big ugly thing with a split level front)
http://www.buzzhost.co.uk/nte5.php

the idea is you can disconnect the rest of the wiring and connect straight on the main feed

you can try both cord and cordless with nothing else - see how that goes - then if it's OK - it proves the problem is with your internal wiring