[asterisk-ss7] Audio Lost

[Anton]

Dear Anders, 

If you could have a look into the topic - that would help us 
very much.

For those, having the audio-lost problem I would suggest the 
following way - which helps me, and brought audio lost 
somewhat down (though, it does not elliminate it 
completely, but you can offer a service atleast)

-------------
I'm managed to make it 
not-so-extensive, by interconnecting two asterisk boxes via 
IAX2 with JitterBuffer enabled. While using it directly 
(chan_ss7) as gateway for SIP voip - the audio lost makes 
things commercially unusable completely.

so my current scheme, which brings down audio-lost problem
TELCO <-> [chan_ss7->IAX2 ] <-> [IAX2->SIP] <-> WORLD

direct scheme
TELCO <-> [chan_ss7 -> SIP ] <-> WORLD 
is commercially unusable

that's why I'm sure making the JB or incorporating 
chan_zap's JB for chan_ss7 would solve the problem, since I 
have not heard the asterisk's PRI has that problem - but in 
meaning of communication with TDM cards - there is no 
difference. So the implementation is the reason. 
Maybe PRI/chan_zap guys know something chan_ss7 guys does 
not know

I would add that current problem MOST LIKELY happens on 
satellite links mostly - when jitter may vary in 50-100ms

What I also noted, while playing with chan_oh323 - which 
uses OPENH323 code, with self JitterBuffer, audio lost is 
MUCH lower, in comparision with SIP or chan_h323 (which 
DOES NOT HAVE JitterBuffer) so the packet arrival 
instability clearly affecting that.

Anton.

On 29 June 2006 17:49, Mr.Surender Reddy wrote:
> Yes sir We tried Dell ,HP Machines but it endup with the
> same audio lost .
>
> regards
> surender
>
> On 6/29/06, Patrick <asterisk-list at puzzled.xs4all.nl> 
wrote:
> > On Thu, 2006-06-29 at 17:21 +0530, Mr.Surender Reddy 
wrote:
> > > Dear sir,
> > >             We have tired all the options avaliable
> > > on the net and the things like patches and what ever
> > > the other users suggested but we are unable to move
> > > this problem out .The voice comes excellent but when
> > > the Choppy voice doesnt continues always but may be
> > > for 10 to 30 sec for 1 or 2 or 5 or 10 minutes it
> > > regurally comes and goes.IF this problem is solved i
> > > can say that chanss7 is the best as the voice we have
> > > seen no other providers here could gives this quality
> > > we are only loosing the market as we have this audio
> > > lost problem and people doesnt want to buy the
> > > callingcards at all.If any one could find a solution
> > > that will be a great help for this chanss7.
> >
> > Have you tried another server?
> >
> > Regards,
> > Patrick
> >
> > _______________________________________________
> > --Bandwidth and Colocation provided by Easynews.com --
> >
> > asterisk-ss7 mailing list
> > To UNSUBSCRIBE or update options visit:
> >   http://lists.digium.com/mailman/listinfo/asterisk-ss7