This topic

Phone filter

richy257 — Mon, 05 Feb 2024 16:00:15 GMT

Does anybody know if I have to fit a filter in the line when I now have fibre fitted?.

I am using my old BT phones, one with a DV Adapter.

Re: Phone filter

imjolly — Mon, 05 Feb 2024 16:03:15 GMT

No filters required for FTTP

Some phones need the filter in the DV adapter to make old phone ring

Re: Phone filter

richy257 — Mon, 05 Feb 2024 16:10:43 GMT

Thanks for the reply,

I wont bother with filters now,

Thanks.

Re: Phone filter

chrisjp — Mon, 05 Feb 2024 17:00:11 GMT

"Some phones need the filter in the DV adapter to make old phone ring"
Unfortunately the DV adapters do not have the needed capacitor in them that makes certain old phones ring. When I was migrated to DV, I used 2 DV adapters to near-replicate my two old phone extensions. One old phone rang OK just plugged direct into the DV adapter, but the other would not, until I plugged it in via one of the filters that I had previously used to separate my broadband signal from my old analogue phone signal.
So yes, the filters that are apparently obsolete, once you go over to DV, ARE sometimes needed still.

Re: Phone filter

richy257 — Mon, 05 Feb 2024 17:04:42 GMT

Many thanks, very helpful.

Re: Phone filter

HHGTTG — Mon, 05 Feb 2024 17:32:25 GMT

I assume though that filters are still required with FTTC or VDSL or are they?

Re: Phone filter

WSH — Mon, 05 Feb 2024 17:44:36 GMT

The "filter" was actually on the voice-side of the system, so if you are on DV it should no longer be needed. Of course, there are all the provisos above. Including that you may need one as a converter for RJ11 to BT 431 plug.

Re: Phone filter

c64z86 — Mon, 05 Feb 2024 19:24:51 GMT

*Deleted*