RE: [Asterisk-Users] Is it possible to push the media processing off to a gateway for processing?

Sat, 24 Jan 2004 08:59:42 -0800

If you are considering such a service, you need to develop a more thorough understanding of VoIP protocols and methods for load distribution. To echo what Stephen Critchfield said to someone else just a few hours ago: it's not simple, and you'll probably need a consultant. After you've spent some time designing and discussing, you'll probably be able to do it yourself next time but to try this from scratch is probably a very long trial-and-error effort.

The short answer to your question for your research is: use load sharing and SIP redirects to spread load across multiple boxes, and yes, asterisk configs can be pulled from mysql in various ways - dig through the distribution for details.

JT


Well, I like the features asterisk gives me such as voicemail and IVR,
Prompts, etc. I would like to offer an IP Centrex like service, but don't
believe that I can handle very large amounts of users on a box. The reason
I believe this is that the box would be doing all the media processing/DSP
work on the processor and would be bound by the speed and memory of the box
as to how many simultaneous sessions it could manage. A gateway has DSP's
which are designed to handle this processing. I know they are more
expensive, but I could handle large amounts of call volume this way and
still keep the features asterisk offers. 

Another question I also meant to ask was having the ability to read
extensions from a database instead of a .conf file.  I was curious if anyone
has asterisk pulling configs from a database like mysql.

Todd


-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of John Todd
Sent: Friday, January 23, 2004 9:05 PM
To: [EMAIL PROTECTED]
Subject: Re: [Asterisk-Users] Is it possible to push the media processing
off to a gateway for processing?

I was wondering if it is possible to have Asterisk push the media
processing 
off to something with DSP's such as a gateway?  That way, asterisk just has
to handle the call setups and tear downs.

Todd Wallace 

You mean, like what SIP does by default?  This is an incomplete
question.  Please be more specific.  If I have a "gateway", and I
have SIP calls coming in from desktop SIP UA's (hardphones or
softphones) then Asterisk can simply re-direct those calls to the
gateway.

Of course, Asterisk _is_ a gateway, so unless you have specific
reasons for doing so, it would make more sense to use Asterisk to
tackle those jobs with generic, cheap processing horsepower rather
than expensive, proprietary DSP's.

If you're just getting Asterisk to handle call setups and teardowns,
why not just use a real SIP proxy for that?  Or do you not know
enough about your question to understand why I would differentiate
between the two?  (not being nasty here, just wondering if I need to
explain more)

JT
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