Hi Satyarth have you read my latest attempt at explaining my scenario? https://lists.cs.columbia.edu/pipermail/sip-implementors/2006-March/0124 58.html
my problem is that there isn't really a D2 domain the callee is in the global "domain.com" (except in the case where the callee is truly external to SIP, which I'll ignore for this discussion) it just so happens that caller and callee may be on a different physical subnet and this is something I can only discover by doing a lookup with the central SIP Registrar (which I am hoping to be able to do using a REGISTER request with a blank "Contact:" field from the caller's outbound proxy at the point of receiving the caller's outbound INVITE request) if it turns out that the callee IS on a different physical subnet from the caller, I need to redirect the caller to the local gateway to effect a bridging call (since my subnets, whilst IP reachable, will not support the VoIP media traffic directly) I am hoping to do this by completing the transaction with the caller by sending a "Moved Temporarily response... does this make sense to you (or anybody else out there!)?? what do you think? m > -----Original Message----- > From: Satyarth Negi [mailto:[EMAIL PROTECTED] > Sent: Tuesday, March 28, 2006 22:30 > To: Barker, Mark > Cc: [email protected] > Subject: Re:Proxy Querying Registrar > > Hi Mark , > I got confused after reading your question . > In which case a Proxy will need to do this ? > > Let me elaborate my point a little more . > > Suppose P1 gets an INVITE from E1. P1 is a proxy of domain D1 > . and INVITE contains a "To:" uri which belongs to domain D2 . > Now we say P1 will query registrar of D2 domain . In this > case P1 will add "<Domain_Name>"(e.g domain2.com) in ReqUri > field of REGISTER request . And P1 will add > "<[EMAIL PROTECTED]>" (e.g [EMAIL PROTECTED]) . And in FromUri > P1 will add its own URI . > > But doing this makes no sense as P1 could have forwarded > INVITE also with the same ReqUri and To-Uri fields . > > This was the way i think . Quite possible that i didnt answer > your question . In any case , do write back to discuss things . > > Regards > Satyarth Negi > The information contained in this e-mail message is PRIVATE. It may contain confidential information and may be legally privileged. It is intended for the exclusive use of the addressee(s). If you are not the intended recipient, you are hereby notified that any dissemination, distribution or reproduction of this communication is strictly prohibited. If the intended recipient(s) cannot be reached or if a transmission problem has occurred, please notify the sender immediately by return e-mail and destroy all copies of this message. Thank you. _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
