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

Luca Bertoncello lucabert at lucabert.de
Wed Jun 24 01:10:12 CDT 2020

Am 24.06.2020 05:05, schrieb Michael Maier:


> Your basic architecture looks good to me - now you have to start the

Nice to hear it...

> analysis of the problem with pcapsipdump and wireshark as I wrote
> before to get an idea what actually happens at
> all. You most probably won't come any further without doing any
> analyzing. You have to learn it. It will take some, or even more,
> time. You can't do it in just few hours or maybe
> even days or weeks. It is work or even hard work to learn and to do it.

Well, that's the very problem...
I don't know *how* to analyze it... Or, better, how to read the data...
I know, I can use tcpdump, sngrep and many other tools, but I don't know 
what I have to expect and how to decide, that a paket is wrong...
Can someone help me to learn it?

> That's my problem: It's impossible for me to assist because I can't
> see any effort on your side to learn. I won't fix your problem. You
> have to fix it yourself. All I can do, is, to
> show you a way to *find* your problem (I can't know your problem) and
> may be to give some hints how to fix it (once you've found it).
> Finding / localizing problems and fixing them
> are two completely different things. But before you fix a problem, you
> have to know the problem. Therefore: go and find your problem by
> starting the analysis. That's the first thing
> to do.

Of course, the first thing to do is to locate the problem...

I think, the problem can *not* be:

1) by Deutsche Telekom (since I have the problem even on local tests)
2) on the devices (since I tested many devices)

so the problem can be:

1) in the Firewall configuration
2) in the Asterisk configuration
3) in the BananaPI

I think I can exclude my switch, since I checked right now and no port 
has errors...

Now the question: can someone help me to understand/learn how to check 
the involved parts and search for the problem?

Luca Bertoncello
(lucabert at lucabert.de)

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