[SIPForum-discussion] Query related to Basic SIP call

sunilkumar.verma at wipro.com sunilkumar.verma at wipro.com
Fri Jan 15 06:12:21 UTC 2010



Proxy will forward the response based on Via header.


Sunil Verma




From: discussion-bounces at sipforum.org
[mailto:discussion-bounces at sipforum.org] On Behalf Of gaurav ahuja
Sent: Wednesday, January 13, 2010 9:06 AM
To: discussion at sipforum.org
Subject: [SIPForum-discussion] Query related to Basic SIP call


Hi All,


As per RFC 3261, 

Via, To, From, C-seq, Call-id, Max-Forwards are the only mandatory
headers in an Invite request

But we still add Contact Header  to know the actual address of UAC


Suppose, in an Invite request there is no contact header, 

so when Proxy receives 180 ringing response, how it will forward that
response to UAC  who initiated the Invite.


Thanks in advance




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