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From: Richmond <dnomhcir@gmx.com>
Newsgroups: uk.telecom
Subject: Re: BT Digital Voice with no router
Date: Sun, 12 Apr 2026 08:39:06 +0100
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David Wade <g4ugm@dave.invalid> writes:

> That is very odd as TrueCall claim it will work with BT's Digital
> Voice service...
>
> https://www.truecall.co.uk/category-s/128.htm
>
> Q. Which network providers does trueCall support?
> A. trueCall will work on standard analogue domestic telephone lines
> from all the main telephone providers, and on most digital lines (with
> the exception of Vodafone, Zen Internet and Community Fibre). We
> recommend that you turn on the Caller ID service from your phone
> supplier (this is free).
>
>
> They claim it won't work with ZEN which I find very odd...
> .. actually I see why now.
>
> https://forums.thinkbroadband.com/zen/4739885-digital-voice-fritzbox-7530-has-broken-my-answerphone.html?fpart=all&vc=1
>
> Dave

As far as I can work out in my case it is because the router does not
supply enough power for the ring signal to get through the truecall box
to the phone. But if the truecall itself provides the ring power then
the phone rings. So the upshot of that it that the system doesn't work
for trusted callers, only for callers who type the code in.

This is down to the type of router I expect but it isn't worth buying a
new router.

I did come across some device which would send a ringing signal but I
don't know if it would work so just haven't bothered.