Catherine,

It seems you also posted all of these questions, except one (that I recall)
as separate notes, which I answered. So, to answer the last, a comprehensive
doc on multiparty conferencing can be found at:

http://search.ietf.org/internet-drafts/draft-rosenberg-sip-conferencing-mode
ls-00.txt

-Jonathan R.

---
Jonathan D. Rosenberg, Ph.D.                72 Eagle Rock Ave.
Chief Scientist                             First Floor
dynamicsoft                                 East Hanover, NJ 07936
[EMAIL PROTECTED]                     FAX:   (973) 952-5050
http://www.jdrosen.net                      PHONE: (973) 952-5000
http://www.dynamicsoft.com
  
-----Original Message-----
From: Catherine Marselli [mailto:[EMAIL PROTECTED]]
Sent: Thursday, June 07, 2001 5:03 AM
To: [EMAIL PROTECTED]
Subject: [Sip-implementors] 5 (almost newbie) questions on SIP


Dear all,

Some 'almost newbie' questions about SIP (user agent side). Thank you very
much in advance for your response. In addition to the group, direct response
to [EMAIL PROTECTED] will be appreciated.

1- Why the minimum implementation of a UA does not require the 'bye' support
? How will be the session terminated, using 'minimum' user agents ?

2- Should a terminal, which is intended to transmit calls to the PSTN,
support something from TRIP (Telephony Routing Over IP) or is it only the
problem of the gateway ?

3- When deploying user agents on the network, how are they configured,
concerning proxies ? Can we specify several proxys or just one ? I kow that
the user agent will first contact a server having the same hostname, and
then a outbond proxy configured manually. But is it possible to specify
several proxys of differnt types (redirect, proxys, etc...)

4- Does somebody know where to find a comprehensive text about the way of
placing conferences, using SIP ?

5- In a SIP session, at what time should the User Agent be able to listening
to the RTP port ? Once the session is established (invite, ok 200, ack) or
at any time during the message exchanges ?

Again, thank you,

Catherine Marselli    
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