ADSL only syncing when phone off hook

[MuvverRussia]

Hi,

Has anyone here ever experienced a problem with an ADSL line where it is not holding sync unless a phone is left off the hook (and even then it is producing audible noise on the line when sync'd).

Tried a couple of phones, routers/modems as well as microfilters (I usually use a BT faceplate). Anyone got any other suggestions that I can try before BT come out?

Thanks.

 

[MuvverRussia]

Yeah, that makes sense. Line works fine for non ADSL stuff but its just not holding sync at all. Thanks.