Proxy and redirect differ fundamentally in that one maintains control of the
call routing (proxy), and the other passes control for call routing back to
the previous hop (redirect). Sometimes one makes sense, and sometimes the
other, depending on the application scenario. Many protocols have the notion
of these two operations (such as DNS, which has recursion and iteration).
-Jonathan R.
> -----Original Message-----
> From: Christer Holmberg [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, May 30, 2001 7:26 AM
> To: [EMAIL PROTECTED]
> Cc: [EMAIL PROTECTED]
> Subject: Re: [Sip-implementors] Redirect Server
>
>
>
> Hi,
>
> >But why do we need it as a logical component also.
> >I think it doesn't serves any purpose in establishing the
> call. Proxy server is enough
>
> It is NOT mandatory to have a redirect server to establish a call. You
> don't even need a proxy for that, if you communicate directly
> user-to-user.
>
> However, there are a number of services and features that can be
> implemented using redirect server functionality in SIP nodes.
> You should
> also remember that you can implement this functionality in your user
> agent, not only in intermediate nodes.
>
> A very basic example is when someone calls you. Your phone starts
> ringing, but at that moment you are having a cup of coffee (for many
> people it is more important to drink it while it's hot than answering
> the phone :), so you press a button that your phone redirects the call
> to your secretary, phone answering machine, or whatever...
>
> Regards,
>
> Christer Holmberg
> Ericsson Finland
>
>
>
> >
> > On Wed, 30 May 2001 10:09:57
> > Christer Holmberg wrote:
> > >
> > >Hi,
> > >
> > >You don't need a redirect server as a physical SIP
> component. If needed,
> > >you may have redirect server functionality in a server
> which also has
> > >proxy server functionality.
> > >
> > >Regards,
> > >
> > >Christer Holmberg
> > >Ericsson Finland
> > >
> > >
> > >
> > >
> > >Ashwani Kesharwani wrote:
> > >>
> > >> Why do we need a redirect server as a SIP component.
> > >> Can't we do only with proxies.
> > >>
> > >> Get 250 color business cards for FREE!
> > >> http://businesscards.lycos.com/vp/fastpath/
> > >> _______________________________________________
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> >
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>
---
Jonathan D. Rosenberg, Ph.D. 72 Eagle Rock Ave.
Chief Scientist First Floor
dynamicsoft East Hanover, NJ 07936
[EMAIL PROTECTED] FAX: (973) 952-5050
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