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 -----Original Message----- From: Juha Heinanen [mailto:[EMAIL PROTECTED] Sent: Friday, April 11, 2008 10:31 AM To: Brian Rosen Cc: 'Dan Wing'; 'Elwell, John'; [EMAIL PROTECTED]; [email protected] Subject: Re: [Sip] E.164 - who owns it Brian Rosen writes: > Unlike in IP networks, an e.164 cannot be "dual homed". It is not possible > for sp1.net and sp2.net to allow origination/termination of the same > e.164. where is that stated? isn't it national policy if dual homing of e.164 numbers is allowed or not? -- juha _______________________________________________ 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
