[#XWM-610908]: Re: [enum-wg] ENUM Adoption - Does a business case matter?

> > This is a non-issue. These numbers are delegated per-block only by the
> > telephony-regulator. They cannot be split after delegation. If the PSTN
> > delegation is terminated, the whole block goes back to the telephony-
> > operator and then it might be split when the numbers are reassigned.
> > In The Netherlands ENUM strictly follows the phonenumber, meaning it
> > isn't possible to gain any rights or usage of a telephone number or
> > numberblock by registration of an ENUM domain.
> > The anomaly of these blocks exists in the telephone numberplan system.
> > It's not something the ENUM registry invented to complicate the
> registration
> > System. (To be honest, given all the validation misery that comes with it,
> > we'd rather loose the whole block concept completely.)
> 
> 	I would have expected that blocks assigned directly in this way
> 	would lead to a simplification of the validation requirement,
> 	taking advantage of the aggregation.
> 
> 	Perhaps I'm missing some key detail?

The 'ideal world' factor, I'd say. Technically you're right. 
Operationally there's no easy way to distinguish a single number from a
starting number of a number block for any other party than the distributing
Telco. So far, the distributing Telco's have shown no real interest to be
involved in validating ENUM registrations for Public User ENUM. That means
that validation of numbers in ranges that can hold numberblocks involves
expensive manual checking of invoices and contracts to make sure that a
number really is the starting number for a certain range, or that any other
single number is either not contained within a block or contained in a
block that has the same numberholder as stated in the validation-request of
the single number.

Kind regards,

Esther Makaay

--
ENUM NL
T +31 26 352 5500
F +31 26 352 5505
E Esther.Makaay at enum.nl
W http://www.enum.nl