asterisk users - Oct 2021 - no audio both ways with ipv6

Hi,

when asterisk registers with the VOIP provider via ipv6 and when
local phones don't work with ipv6 but only with ipv4, am I to
expect issues?

I'm receiving incoming calls via the provider, asterisk correctly
dials the phone where the calls are suposed to go to, the phone
rings --- and when I pick it up, there is no audio in either direction.

There are no packets showing up in the logs as being rejected by the
firewall.  I can make outgoing calls just fine, and those are with
the VOIP provider on one side and the same ipv4 phone on the other.

How can it be that incoming calls have no audio?

On Thursday 14 October 2021 at 19:22:00, hw wrote:
> Hi,
> 
> when asterisk registers with the VOIP provider via ipv6 and when
> local phones don't work with ipv6 but only with ipv4, am I to
> expect issues?
Do a SIP packet capture and see what the SDP in the INVITE is telling each end 
to expect from the other.
> I'm receiving incoming calls via the provider, asterisk correctly
> dials the phone where the calls are suposed to go to, the phone
> rings --- and when I pick it up, there is no audio in either direction.
Sounds like the setup is trying to do direct media - which obviously cannot 
work between an IPv4-only phone and an IPv6-only provider.

Make sure Asterisk remains in the audio path and it should "almost
transcode"
for you.

I have audio working over just such an arrangement (in my case, an IPv4-only 
provider, and phones connected via IPv6) without problems.


Antony.

-- 
The difference between theory and practice is that in theory there is no 
difference, whereas in practice there is.

                                                   Please reply to the list;
                                                         please *don't* CC
me.