[asterisk-users] Voice "broken" during calls

Luca Bertoncello lucabert at lucabert.de
Mon Jun 15 14:50:36 CDT 2020

Am 15.06.2020 um 21:28 schrieb Antony Stone:
> On Monday 15 June 2020 at 21:19:51, Luca Bertoncello wrote:
>> But I'm not really sure, that Asterisk could be the problem, since, as I
>> said, the problem happens even if I connect the phone direct to the
>> server of Telekom...
> I think that is significant, even if the routing is still going through the 
> Banana.

What do you mean? In which sense this is "significant"?

>> Well, during the calls, the BananaPI has a load of max 1, and it have 2
>> cores...
> Multi-core CPUs are only a benefit if you can run separate applications (or at 
> least separate threads of an application) on the separate cores.

Yes, of course.

> I'm not sure Asterisk can do this for a single call.

But of course the BananaPI can handle that Asterisk uses a core and
reserve the rest (or part of it) to manage the PPPoE connection...

>> The LAN interface is Gbps, and my DSL is only 50Mbps, so it is not
>> possible to get it full of band...
> Can you get the full 50Mbps through the Banana when you're doing a download of 
> something biggish?

What do you mean now? If I can use the full available band or if I can
download exactly 50Mbs?
The answer to the first question is: YES! That's why I use a traffic
shaper... ;)
The answer to the second question is: NO. I made a speedtest right now
and I get only ~18Mbps download.

>> Last but not least: I tried calls via Skype and WhatsApp (with my phone
>> in my WLAN). No problem and very good quality, so the BananaPI does not
>> have any problem to manage the data transfer, isn't it?
> The big difference there, though, is that Asterisk (running on the Banana) is 
> not handling the call, so you have the traffic being routed through the Banana, 
> but Asterisk is not being asked to do anything with it in the middle.

Yes, and the voice quality is excellent, but *just* if I'm *not* using DT...
As soon as I use DT (configuring the phone to connect directly to the
server) both partners can hear the "interruptions"...

Luca Bertoncello
(lucabert at lucabert.de)

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