RE: [SIP] What method should be used?

> -----Original Message-----
> From: Rami Lehtonen [mailto:rampe@cs.tut.fi]
> Sent: Wednesday, January 03, 2001 7:59 AM
> To: sip@lists.bell-labs.com
> Subject: [SIP] What method should be used?
> 
> 
> Hi all!
> 
> The SIP specification and the extensions defined for the SIP 
> give a lot of
> possible methods to be used for transferring parameters between two
> end-points. In our case we are interested in transferring 
> stream parameters
> to an end-point (B) that starts the session with some third 
> end-point (C),
> see the figure below:
> 
> A  --parameter transfer-->  B  <===session===>  C
> 
> So should we use the methods like INVITE or MESSAGE (or even 
> NOTIFY) to
> deliver the parameters from A to B? 

I do not know what a stream parameter is. SIP is not an RPC protocol nor a
means of generic data messaging between any two entities. If you are
interested in having some user A cause a call to be established between B
and C, you can use the REFER method:

http://search.ietf.org/internet-drafts/draft-ietf-sip-cc-transfer-02.txt

or third party call control:

http://search.ietf.org/internet-drafts/draft-rosenberg-sip-3pcc-01.txt

-Jonathan R.

---
Jonathan D. Rosenberg                       72 Eagle Rock Ave.
Chief Scientist                             First Floor
dynamicsoft                                 East Hanover, NJ 07936
jdrosen@dynamicsoft.com                     FAX:   (973) 952-5050
http://www.cs.columbia.edu/~jdrosen         PHONE: (973) 952-5000
http://www.dynamicsoft.com

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