Hi All,

   Please clarify the below query regarding network authentication.

   While making a call through server, when the callee accepts the call, 
server is adding Authentication-Info header in 200 OK response to INVITE 
request.

    INVITE
------------------->
       407
<------------------
    INVITE
------------------->
   200 OK with Authentication-Info header
<------------------

As per 3GPP spec 33.203, server adds Authentication-Info header in 
REGISTER response, Proxy-Authentication-Info header in Non-REGISTER 
response.

1. Can server add Authentication-Info header in non-REGISTER response 
and Proxy-Authentication-Info header in REGISTER response?

2. If yes for query#1,
   i. Should client process both Authentication-Info and 
Proxy-Authentication-Info header are same?

Regards
Vijay
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