[asterisk-users] Re: One way choppy sound

[Tim Panton]

>
> On 1/19/07, Martin Joseph <ast at stillnewt.org> wrote:
>> On 2007-01-17 10:29:43 -0800, Yelson Vivas <yvivas at gmail.com> said:
>>
>> > Hi Guys
>> > I'm conecting 2 astersk servers using this arquitecture
>> >
>> > (Ext softphone)<==sip==>(asterisk 1)<====iax2 trunk====> 
>> (asterisk 2)
>> > <===alaw==>(pstn)
>> >
>> > If i call from the Ext  to the asterisk 2 the sound is perfect,  
>> but  if
>> > i call from Ext to the pstn, i can hear perfect but they tell  
>> me  that
>> > sound really choppy, i tried using several codecs (same  
>> problem)  but
>> > i don't understand why the sound is bad in only one way.
>> > Any sugestions to solve it more than welcome
>>
>> Usually sounds can be "choppy" one way due to constrained upstream
>> bandwidth.  There might be plenty of room for the audio to get to  
>> you,
>> but that doesn't mean the reverse is at all true.
>>
>> Jitter buffering can help this,  or using a more compact format (like
>> GSM or g729) is also a potential helper.
>>
>> Good luck, hope this helps,
>> Marty
>>

On 21 Jan 2007, at 03:46, Andrew Joakimsen wrote:
> I've actually found in many cases a lower bandwidth codec doesn't
> improve at all and however it oftentimes makes the issue worse.

What other traffic do you have on the IAX trunk link ? Even if it isn't
'full' you may be hearing your IAX packets being delayed behind 'bigger'
packets, or sitting in a low priority queue on a router. You might  
want to
look into applying a QoS to the link.

Tim Panton

www.mexuar.net
www.westhawk.co.uk/