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

Hey,

Just offering a small explanation.

> > But because in NL we have a fixed number plan, we can
> > also delegate numberblocks of 10, 100, 1000 or 10.000 numbers.
> 
> !!! But the delegation from the registry is by prefix (only one
> register for each kind of delegation), or by number (there is a price
> reduction, but each number has it's own register)
> 
> For me, only the second solution can be used. The first one, while
> more pratical and easy to deploy, may have a hard time longer on when
> the numbers start to "float" away in things like: renumbering, number
> portability, fusion/cisions of companies/users, ...
> 
> If you delegate to the registrar A, 1000 numbers and the 352, for some
> reason (later), has to be moved away or unregistred from the tree on
> that registrar, how do you/they handle that?

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.)

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