Mark, This is a queer problem, kind of difficult to put your hands around. So your signalling is on IP network, but to reach some clients, a voice gateway needs to be used - which I assume you will handle though SDP. Your basic question is - when you get an INVITE, who do you route it to? This apprears to be a standard problem where users on one domain are connected through several different gateways. I am thinking you would have the clients register against their own gateways, and the gateways register with the registrar in some fashion using a protocol like TRIP. Now, a new INVITE uses the registration info to forward the INVITE correctly. Is that a possibility?
Regards, Kedar On 3/29/06, Barker, Mark <[EMAIL PROTECTED]> wrote: > > 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 > _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
