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
