Hi,

Reffering to RFC 3325

9.1 The P-Asserted-Identity Header

   The P-Asserted-Identity header field is used among trusted SIP
   entities (typically intermediaries) to carry the identity of the user
   sending a SIP message as it was verified by authentication.

and

9.2 The P-Preferred-Identity Header

   The P-Preferred-Identity header field is used from a user agent to a
   trusted proxy to carry the identity the user sending the SIP message
   wishes to be used for the P-Asserted-Header field value that the
   trusted element will insert.

BR

Bart


On Thu, 20 Sep 2018 11:12:51 +0200, Harshith Mulky <harshith.mu...@outlook.com> wrote:

Hello Experts,

I wanted to know if Multiple PAI or PPI headers be supported in INVITE request message? If yes, what are the conditions where in which PAI or PPI can be selected out of a set of PAI or PPI headers present, either by softswitch or the User Agent
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