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From: Richmond <dnomhcir@gmx.com>
Newsgroups: uk.telecom
Subject: Re: Have BT been making unannounced changes?
Date: Mon, 06 Jul 2026 10:51:58 +0100
Organization: Frantic
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Trolleybus <ken@birchanger.com> writes:

> On Sun, 5 Jul 2026 14:33:21 +0100, Andy Burns <usenet@andyburns.uk>
> wrote:
>
>>David Wade wrote:
>>
>>> The ZEN product is provisioned via the SIP support in the Fritz!Box
>>> router, so if its "BT Digital Voice" being resold does that mean BT
>>> is using standard protocols?  >>Maybe Zen have at various times
>>> resold DV, and other times their own >>VoIP, I do remember customers
>>> talking about it being DV
>>
>>I imagine everyone uses standard protocols, why wouldn't they?
>
> I attended meetings at BT in about 2000. At one time BT had submitted
> 1000 change requests to SIP and related protocols as they planned for
> what is now DV.

They use their own protocols to hide what they are doing and lock you
into their hardware. Let's call it the Amazon model.