Subject: [Sip] Query on third party registrations

From: rohit agrawal <[email-masked]>
Date: Mon, 22 Oct 2007 12:10:14 +0100 (BST)

Hi All,
   
  I have following two queries. If any of you can give them a thought and reply I would be thankful to you.
   
  1) What is the necessity of third party registration in IMS ? Why S-CSCF should register endpoints with its own FROM header in the REGISTER message ? Can we have some realistic examples on the same ? If in those examples the FROM header is those of endpoints won't the services will be executed at AS ? 
   
  2) IF third party registration is done and AS needs to do authentication, whose credentials should come in the re-register message ? 
   
  Regards
Rohit Agrawal

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