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From: Richmond <dnomhcir@gmx.com>
Newsgroups: uk.telecom.voip
Subject: Re: About 5% of outgoing calls fail with one-way sound only - fix?
Date: Sat, 24 Jan 2026 17:31:03 +0000
Organization: Frantic
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David Higton <dave@davehigton.me.uk> writes:

> In message <82ms23i937.fsf@example.com>
>           Richmond <dnomhcir@gmx.com> wrote:
>
>> As I understand it, with SIP, the outgoing packets can contain local IP
>> addresses anyway, so if it is a local ipv6 address beginning with fe80::
>> that wouldn't be any use either.
>
> An IPv6 address begining with fe80: is the equivalent of 127.0.0.1, i.e.
> localhost.
>
> There would be no point in sending out non-routable IPv6 addresses.
>

Exactly, that's the problem with SIP and NAT.