[enum-wg] CRUE

On 27 Jul 2009, at 16:23, Christian de Larrinaga wrote:

> When this idea started out in the UKEG I recall it was discussed in  
> terms of a way to help VoIP service providers gain new (and only  
> new) local number ranges to route over IP and to them through TDM  
> gateways.

Not quite. The initial motivation was bulk population of  
4.4.e164.arpa. That was clearly explained in the CRUE documents I  
authored 4-5 years ago. This was also the motivation of the people in  
UKEG/UKETG who kicked around the original ideas that were then written  
up.

The rationale was that if there was significant amounts of meaningful  
data in the tree, there would be an incentive for providers to do ENUM  
lookups. That in turn might encourage more ENUM-aware applications and  
services to be deployed. It was felt that VoIP providers might want to  
use CRUE as a way to avoid paying termination charges for inbound  
calls from the PSTN. But this was a second order effect. Another side- 
effect of CRUE was simplification of the authentication and validation  
issues: a VoIP provider could issue an {ENUM-only?) number to a  
customer, eliminating the need someone to prove they "owned" that  
number.