[asterisk-users] IAX best practices

[Asterisk]

Thanks Steve!

What are usually the best approaches in troubleshooting the audio
quality issues and QoS related stuff when putting two Asterisk boxes
together via IAX?

Have you ever tried connecting Asterisk boxes in the same VPN (but still
in different countries)?

Regards,
Alex


-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Steve
Totaro
Sent: Thursday, March 01, 2007 4:22 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] IAX best practices

Asterisk wrote:
> Hi guys,
>
> I am planning to connect two Asterisk boxes that are currently running
> in two different countries, using IAX.
>
> I was wondering if anyone could provide me with some links or
suggestion
> regarding best practices in connecting two Asterisk in such way. I
guess
> many of you have already tried this, and already have some know-how
> (what I should be careful about, what to avoid, etc...)?
>
> Regards,
> Alex
>   
Bandwidth and latency.  IAX2 is remarakably good at traversing NAT and 
even double NATs.  It should just work.  The issues that I ran into are 
low bandwidth and latency.  Not much you can do about latency besides 
getting a better route and putting QoS on your equipment and hoping that

your provider either observes your tagging or is not very latent to 
begin with.  The other is bandwidth which I found SPEEX works wonders 
(but adds to latency).

In my experience, bandwidth issues result in choppy audio and latency 
results in delays which cause people to talk on top of each other and 
can be extremely annoying.

Try pinging a router or device at the remote side to get an idea of how 
latent your connection will be. 

Thanks,
Steve
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