[asterisk-users] Voice "broken" during calls

Jeff LaCoursiere jeff at stratustalk.com
Mon Jun 15 13:15:22 CDT 2020


We are working on a product to analyze pcap files of VoIP calls. So far 
it does a reasonable job of analyzing the frequency distribution of 
packets in both directions, pointing out which direction packet loss / 
bad jitter occurs.  If you can trap the traffic on the outside and the 
inside of your Banana Pi and send me the pcap files, I would be happy to 
run it through our analyzer as further information for you.  If it shows 
DTK isn't sending packets when it should, that will be obvious, and you 
can send to them as solid evidence of their guilt :)

Beyond that, are you certain you aren't taxing the Banana Pi?  It really 
*should* be able to handle a single call while handling your LAN's 
routing/firewall tasks, but you are probably skating the edge.  The 
results of the above might point out that the Pi isn't *sending* packets 
it should be, or sending them way late, in which case the issue is 
actually your hardware.


	*Jeff LaCoursiere*

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Email: 	*jeff at stratustalk.com* <mailto:jeff at stratustalk.com>
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On 6/15/20 11:55 AM, Luca Bertoncello wrote:
> Am 14.06.2020 um 17:33 schrieb Luca Bertoncello:
> Hi
> So, I got a phone (Elmeg IP290) from a collegue and tested it...
>> What I'll do tomorrow with a test phone is:
>> 1) connecting it to my Asterisk and try to make a call
>> 2) connecting it directly to the servers of Deutsche Telekom (using my
>> network) and try to make a call
> Absolutly *no changes* on the behaviour compared with my Thomsons...
> I try to summarize:
> 1) Phones are not the problem, since 3 phones of 2 different
> companies/model have the same issue.
> 2) Asterisk seems not to be the problem, too, since I have the same
> behaviour if I connect to phone directly to the server of Deutsche Telekom.
> 3) Traffic shaping seems not to be the problem, too, since I tried to
> deactivate it.
> 4) The problem happens *only* on active call, not by voicemail.
> 4a) To test it I read a text and my partner just listen it, and then he
> read a text and I listen it. *No* simulaneously speak!
> 5) A *single call* (since I couldn't reproduce it anymore), made using
> my Android phone as SIP-client connected to my Asterisk, had not the
> problem. Any other try to call someone using my mobile phone via SIP had
> the problem.
> I could *not* test connecting to the server of Deutsche Telekom using
> the Internet connection of someone other, since Telekom bounds my
> VoIP-login to my IP.
> I really think, the problem should be by Deutsche Telekom...
> What is your opinion? Do you see some other tests I should try?
> Thanks a lot
> Luca Bertoncello
> (lucabert at lucabert.de)
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