Hello,
 
I'm currently looking at SIP for multipoint conferences.
I have some problem to understand how the call set-up and control would be done with SIP when more than 2 users are in a conference call. Can 3 SIP user agents contact each other directly without a network server or MCU? Is a proxy or redirect server always needed?
 
Thanks for your help.
Arthur
 
-----Original Message-----
From: Brian Eberman [mailto:[EMAIL PROTECTED]]
Sent: Monday, May 22, 2000 8:13 PM
To: [EMAIL PROTECTED]
Subject: Transfers

I'm working on understanding how to implement the specification for a PSTN gateway and I am having trouble figuring out how to send an INVITE message (or other message) to effect a transfer.
What I want is A is talking to B and B wants to tell A to call C.  Is this possible?
-Brian

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