[enum-wg] Follow up on Jim Reid's presentation - CRUE and relation to IETF work

On Apr 28, 2006, at 11:35, Stastny Richard wrote:

> IMHO this could only work, especially in User ENUM, if this
> Sip?:number at bt.com;user=phone is used purely to indicate a
> Service Provider ID (SPID). The domain name given is not resolvable
> in the public DNS, only within
> the providers DNS (as proposed yesterday by GSMA with the Local
> Routing Tables (LRT).

Richard, your assumption is wrong. Any SIP URI's entered through CRUE  
live in the PUBLIC 4.4.e164.arpa tree. They should be resolvable on  
the public internet. If they're not, there's no point in those SIP  
URIs existing or being visible in the public DNS. If a provider wants  
to put unresolvable names on the internet, then that's their funeral.  
I wouldn't recommend that because it's bad for the operational health  
of the internet. It would be as dumb as publishing hostnames with  
unreachable RFC1918 addresses on the public internet.