Hi, Request_URI is used for routing purposes, hence if any SIP message reaches to your IP-PBX then it is becoz of R-URI (not becoz of 'TO'). Once message it reached, now it is upto IP-PBX to decide which field to use to find UAC (Station as you say). Sometimes ISP s/w sends child ID in R-URI, parent ID in To and vice-versa. So I guess you need to check your ISP switch behavior and decide. Most of the cases, R-URI has patent ID but otherwise is also possible. I hope this helps, Vipul Rastogi Engineer, Business Management Team Telecommunication Network Business Samsung Electronics CO, LTD Suwon P.O.BOX 105, 416 Korea 442-600 MO 010-9530-0354 ----- Original Message ----- From: "SungWoo Lee" <[EMAIL PROTECTED]> To: "Sanjay Sinha (sanjsinh)" <[EMAIL PROTECTED]> Cc: <sip-implementors@lists.cs.columbia.edu> Sent: Tuesday, December 04, 2007 2:04 PM Subject: Re: [Sip-implementors] To and Request-URI
> What if the number in Request-URI is the same with one of the > station numbers in IP-PBX? Does the IP-PBX still have to refer to > TO number? > > In case IP-PBX has received a forwarded Invite from Proxy, > TO number will stay the same as an original receipient, but Request-URI > will have a new number specified in Contact Header in 302 response. > I think, in this case, IP-PBX is supposed to refer to Request-URI number. > What do you think? > > 1. Proxy ----> IP-PBX (Invite, Request-URI: A To: A) > 2. IP-PBX ----> Proxy (302 Response, Contact: B) > 3. Proxy ----> IP-PBX (Invite, Request-URI: B To: A) > > Regards, > > Sungwoo > > > ------- Original Message ------- > Sender : Sanjay Sinha (sanjsinh)<[EMAIL PROTECTED]> > Date : 2007-12-04 13:07 (GMT+09:00) > Title : RE: [Sip-implementors] To and Request-URI > > Number on request-uri should be used to route the Invite request/. > >>-----Original Message----- >>From: [EMAIL PROTECTED] >>[mailto:[EMAIL PROTECTED] On >>Behalf Of ??? >>Sent: Monday, December 03, 2007 7:15 PM >>To: sip-implementors@lists.cs.columbia.edu >>Subject: [Sip-implementors] To and Request-URI >> >>Dear all, >> >>I am wondering how IP-PBX can handle an incoming INVITE >>message that has different Request-URI and To, provided that >>the IP-PBX is able to receive the both 2 DID numbers. My >>Scenario is this. >> >>IP-PBX has two stations; A & B >> >>Proxy --------------> INV -------------> IP-PBX >> >>INVITE A >>TO: B >>FROM: C >> >>Which address should IP-PBX refer to? In case of call forward, >>this may happen. >>then how can IP-PBX know that this Invite message is fowarded >>if there is no clue like diversion or reason header in it? >> >>Thanks. >> >>Lee, Sungwoo >> >>_______________________________________________ >>Sip-implementors mailing list >>Sip-implementors@lists.cs.columbia.edu >>https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors >> > > _______________________________________________ > Sip-implementors mailing list > Sip-implementors@lists.cs.columbia.edu > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
