In reply to a post by MrSaffron:

The dangly filters reproduce the ring wire, which is just produced by the master socket normally. Its when you leave and next person does not have ADSL that no ring wire can cause issues

SHOULD ...

My neighbour has several phones that will not work properly with filters - there is a very short "ting" at the start of each ring pulse and that is all. A standard master and filtered face plate is fine. What does he do for work? Senior Tech with BT with several years of SFI experience.

Whose microfilter, some overseas ones don't do the ring wire at al (thought they'd stopped being imported years ago) and others were not really that good.

No probs Daniel, I appreciated your help.

Quite a few different ones including various BT supplied and several from me - it is probably a characteristic of the phones.

It was easier/quicker to rewire and more the master rather than keep trying.

In reply to a post by MHC:

It was easier/quicker to rewire and more the master rather than keep trying.

Or try a filtered extension faceplate?