HI Brett, Thanks for your response.
>From Section 20.10, the contact header is *Contact: "Mr. Watson" <mailto:wat...@bell-telephone.com <wat...@bell-telephone.com>> ;q=0.1* >From 20.20, the from header is *From: "A. G. Bell" <sip:a...@bell-telephone.com <sip%3a...@bell-telephone.com>> ;tag=a48s* >From Section 20.42, the via header is *Via: SIP/2.0/UDP erlang.bell-telephone.com:5060;branch=z9hG4bK87asdks7.* *If i will see all the header contains "**bell-telephone.com <http://bell-telephone.com>**" as the domain name.* so here my question is, why 3 times the same being display, i can make use of this address from any one of the header. for example, when callee wants to send request to caller, it used the contact to send the packet, why callee cant send request based on FROM header as both CONTACT & FROM contains the same address. Thanks, Anjan On Tue, Aug 5, 2014 at 2:58 PM, Brett Tate <br...@broadsoft.com> wrote: > They don't have to contain the same values. > > RFC 3261 sections 20.20, 20.10, and 20.42 describe the purpose of the > headers. > > -----Original Message----- > From: sip-implementors-boun...@lists.cs.columbia.edu > [mailto:sip-implementors-boun...@lists.cs.columbia.edu] On Behalf Of Anjan > Naik > Sent: Tuesday, August 05, 2014 5:18 AM > To: sip-implementors@lists.cs.columbia.edu > Subject: [Sip-implementors] what is the significant of IP address present > in FROM, CONTACT & VIA Header > > HI All, > > Can anyone explain me , > what is the significant of IP address present in FROM, CONTACT & VIA > Header ? > > As all the header contains the same caller IP Address when INVITE being > initiated. > > Thanks, > Anjan > _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
