[asterisk-dev] Asterisk RTP Jitter Buffer and DAHDI Channels

[Fernando Berretta]

:-) could be.. I think.. Windows QOS is the problem.. We have tried 
several SoftPhones, XLITE, EYEBEAM, BRIA, etc. etc.. and all seems to 
have same behavior, if you take a tcpdump from Asterisk side you can see 
packets are arriving with Jitter.. and if you do the same with wireshark 
from windows.. packets are going out with jitter... but anyway if called 
party have a good jitter buffer is all right but if gateway is used to 
send the call to PSTN and it has not a good jitter buffer (it could be 
the case of DAHDI ??) there is a problem

On 4/25/2012 5:57 PM, Russell Bryant wrote:
> On Wed, Apr 25, 2012 at 4:54 PM, Fernando Berretta
> <fernando.berretta at gmail.com>  wrote:
>> I've configured in chan_dahdi in order to try..
>>
>> jbenable=yes
>> jbforce=yes
>> jbmaxsize=50
>> jbimpl = fixed
>>
>> IP Phones / SoftPhones are in same LAN than Asterisk so.. Jitter never
>> should be greater than 50ms (I hope), I've detected Windows Based SoftPhones
>> send RTP packets with a lot of Jitter and.. at least for me... was
>> practically imposible fix this issue
>>
>> what's your opinion ?
> My opinion is that it sounds like those windows based softphones suck.  :-)
>