[Asterisk-Users] Asterisk 1.2.4 IAX2 New Jitterbuffer Tuning

Tue Feb 21 05:34:30 MST 2006

This is not going over the Internet.  It is going over an MPLS IP-VPN.

________________________________

From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Michael J.
Liberatore
Sent: Monday, February 20, 2006 7:55 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: RE: [Asterisk-Users] Asterisk 1.2.4 IAX2 New Jitterbuffer
Tuning

so you think this problem is asterisk and not a internet problem?  My
customers also complain alot about IAX2 connection to teliax which
seemed to work better in older * versions.  I have tried everything with
no success, i switched to sip and its alot better but not perfect...

________________________________

From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Adam
Robins
Sent: Monday, February 20, 2006 6:51 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion; Asterisk
Users Mailing List - Non-Commercial Discussion
Subject: RE: [Asterisk-Users] Asterisk 1.2.4 IAX2 New Jitterbuffer
Tuning

Thanks, but we already have the TOS bits set to 0xB8, which matches the
QoS settings in our switches and routers.

This is definitely something that changed in the 1.07 to 1.24 upgrade.
We have a pair of identical 1.07 servers connected via the same network
pipe that do not exhibit these issues.

I might try recompiling with the old jitterbuffer to see if it makes a
difference.

________________________________

From: asterisk-users-bounces at lists.digium.com on behalf of Jesus E
Zepeda
Sent: Mon 2/20/2006 5:02 PM
To: 'Asterisk Users Mailing List - Non-Commercial Discussion'
Subject: RE: [Asterisk-Users] Asterisk 1.2.4 IAX2 New Jitterbuffer
Tuning

In my case I don't have a T1 or even a fractional T1, but cable and have
noticed that choppy calls can be reduced by adding tos settings. Like:

Tos=lowdelay|throughput|reliability

Regards,
Jesus

-----Original Message-----
From: Adam Robins [mailto:arobins at PharmaCentra.com]
Sent: Monday, February 20, 2006 14:43
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: RE: [Asterisk-Users] Asterisk 1.2.4 IAX2 New Jitterbuffer
Tuning

I have now set the "resyncthreshold" to -1, to turn it off.  I have also
set the "maxjitterbuffer" to 2000.

I still received 10 complaints of choppy calls today on Asterisk 1.2.4
versus only 1 complaint on Asterisk 1.07.

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of yusuf
Sent: Monday, February 20, 2006 10:27 AM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [Asterisk-Users] Asterisk 1.2.4 IAX2 New Jitterbuffer
Tuning

Adam Robins wrote:
>
Hi Adam

> After many days of playing with the new jitterbuffer and trunking
options for IAX2, I have finally received almost acceptable quality.  I
am receiving 5-8 complaints a day of calls "breaking up" from both the
customer and agent sides.  What I have discovered is that in most of
these cases, the new jitterbuffer performed a resync during the call.
Currently, I have the resyncthreshold, and all other jb parameters at
their default levels  The traffic is running over a fairly high latency
WAN connection between Canada and Atlanta (IAX2, ILBC).  Idle ping times
run about 85ms.
>
I am interested to know why you are using ilbc, n why not g729 ot g723
or speex.  What is the size of the WAN connection.  How many calls are
you running over this link.  I just need to see how others are fairing
with IAX2 over WAN links, as I am the final stages of testing on my side

thanks,
yusuf
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