Re: [Partysip-dev] Call stateful proxy

[Aymeric Moizard]

On Fri, 28 Nov 2003, Robert Högberg wrote:

> Hello,
>
> I think that I need a call stateful proxy for my quite odd setup. Does
> partysip have this functionality? Would it be hard for me to add this
> functionality?

It's quite easy to be call statefull, but if you want to control calls
and tear down both side from a decision made on the proxy... being
call statefull will not be enough.

I think it's close to impossible with partysip. You need some kind of
B2BUA for this.
Aymeric

> This is what I'm trying to do:
> I have an external SIP phone and a computer running Windows messenger. When
> I make a call from my SIP phone I'd like to add video to this call by having
> the proxy INVITE Windows messenger into the session and have the proxy
> modify the SDP body in order to add the video section. This would result in
> video going to Windows messenger and audio to the SIP phone. I assume that
> the callee has both video and audio capabilities.
>
> In order to tear down both the sessions (One session between the phone and
> the callee and one between Windows messenger and the proxy) when one of them
> is terminated I think I need a call stateful proxy (probably with heavy
> modifications :-)). If there's a more standard way of accomplishing the same
> thing I'd love to hear about it, but I'm prepared to do some plugin writing.
> Is it enough to write a plugin for this purpose or would this require
> changes deep inside partysip?
>
> Thanks in advance!
>
> Robert
>
>
>
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