Jerry Yin wrote: > So far as I know, many SIP UAs are using P-Asserted-Identity to display the > real user. Please have a look at RFC3325. If the B2BUA knows which callee > answered the call, it can insert this header. Then the UA will display the > calling and called party accordingly.
That can work for environments that have it, and if they use it in the reverse direction. What you may be looking for is connected-identity. See http://www.ietf.org/internet-drafts/draft-ietf-sip-connected-identity-05.txt Paul > Jerry Yin > Mitel Networks. > >> -----Original Message----- >> From: [EMAIL PROTECTED] >> [mailto:[EMAIL PROTECTED] Behalf Of Paul >> Kyzivat >> Sent: Thursday, May 24, 2007 9:40 AM >> To: George AK >> Cc: [email protected] >> Subject: Re: [Sip-implementors] B2BUA - Contact header? >> >> >> >> >> George AK wrote: >>> Hi, >>> >>> When UserA send INVITE which goes thru a B2BUA to UserB, >> should the B2BUA puts its address in the Contact header field? >> >> If it doesn't insert its own contact address then it is a proxy rather >> than a B2BUA. >> >>> In that case, UserA will see only B2BUA's Contact address in >> the 200 OK response. >> >> Yes, that is the point. >> >>> How will UserA know, who actually answered the call? >> What do you mean by "actually answered the call"? >> >> As far as SIP is concerned, it is the B2BUA that answered the call, >> though it may be acting as a surrogate for something else. >> >> Its hard for User A to make an accurate determination of who it is >> talking to in any case. There is some work on called party identity that >> you can look into. (I forget the name of the draft right now.) >> >> Paul >> >>> thanks in advance. >>> >>> rgds, >>> George >>> >>> >>> --------------------------------- >>> Looking for people who are YOUR TYPE? Find them here! >>> _______________________________________________ >>> Sip-implementors mailing list >>> [email protected] >>> https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors >>> >> _______________________________________________ >> Sip-implementors mailing list >> [email protected] >> https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors >> > _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
