[asterisk-users] Voice broken during calls (again...)

Marek GreŇ°ko mgresko8 at gmail.com
Mon Jun 22 15:12:32 CDT 2020

Would you mind repeating the test with canreinvite=no set for all you
phones and mobile phones?

What is your upload bitrate? Is it guaranteed?

I would try also to test the PMTU:


ping -M  do -s 2000 ${ip address of the sip server}

You should receive icmp asking for lowering the packet size.

The LTE phones could have lower MTU and thus overcome PMTU problem.


2020-06-22 21:48 GMT+02:00, Luca Bertoncello <lucabert at lucabert.de>:
> A thing I forgot to report...
> My Asterisk listen on an high port (*not* 5060), since I had many
> problems in the past with someone trying to use my Asterisk with brute
> force attack...
> I really don't think, this can be the problem, but better to report all...
> Regards
> Luca Bertoncello
> (lucabert at lucabert.de)
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