Nope. I mean you can't have two calls with the same e.164 that are originated from or terminated to different carriers.
Let's say you have two carriers who serve you. Doesn't matter how they serve you or where they pick up or deliver calls. Only one of them will (should) accept a call with a particular e.164. Only one of them can deliver you a call with a particular e.164. The one carrier associated with an e.164 can deliver it to any point, or even multiple points in a subscriber network. There can be multiple physical or logical paths, but the call will be originated from or terminated to one carrier. If you have two carriers, you have two distinct sets of e.164s that they handle. Brian -----Original Message----- From: Hadriel Kaplan [mailto:[EMAIL PROTECTED] Sent: Friday, April 11, 2008 11:25 AM To: Brian Rosen; 'Juha Heinanen' Cc: [email protected]; 'Elwell, John'; 'Dan Wing' Subject: RE: [Sip] E.164 - who owns it I'm not quite sure how you mean "dual-homed E.164". In IP, I think of dual-homed as simply being reachable through multiple interfaces (for a dual-homed host), or multiple BGP exit/entry points for a common prefix (for a dual-homed end network). If you're implying there is only one physical or logical path to reach a given E.164, well, you'd be wrong. :) From a SIP perspective, I think there are also in fact multiple origination and termination points for the same E.164, because I consider the PSTN/H.323/whatever to be "the end" from a SIP perspective. In other words if in SIP-land I can send a SIP Invite to one of multiple next-domains, each of which would ingress it into the PSTN, I consider them each distinct SIP termination points. But I'm not sure you mean it that way? -hadriel > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of > Brian Rosen > Sent: Friday, April 11, 2008 11:07 AM > To: 'Juha Heinanen' > Cc: [email protected]; 'Elwell, John'; 'Dan Wing' > Subject: Re: [Sip] E.164 - who owns it > > In theory, as with any PSTN regulation, it could be. > > As a practical matter, the way calls are routed, it isn't I believe. Are > you aware of a country that allows it? I'd love to see the routing > tables. > You've got a better shot of allowing two carriers to originate a call with > the same e.164. There is no error checking, or reverse routability checks > in the SS7 network. However, usually carriers frown on spoofing of called > party number. > > In all the work I've seen on numbering, including all the latest ENUM > deployments, dual homed e.164s wouldn't work. > > That doesn't mean we couldn't make them work in ENUM/SIP land, just that > the > current state of the PSTN, and the ENUM deployments, doesn't allow the > possibility, AFAIK. > > Brian > _______________________________________________ Sip mailing list https://www.ietf.org/mailman/listinfo/sip This list is for NEW development of the core SIP Protocol Use [EMAIL PROTECTED] for questions on current sip Use [EMAIL PROTECTED] for new developments on the application of sip
