Re: [Enum] IETF, ENUM and NGN

["Stastny Richard" <Richard.Stastny at oefeg.at>]

>These number ranges if PROPERLY delegated based on existing E164
>numbering plans in place in each country do NOT overlap so they could
>stay in the same tree. Or do they?

Thank you, Adrian for this question. Of course they do
overlap.

Consider a cable operator has assigned a number block
(e.g. UPC) in Vienna: e.g  +43 1 979xxxx

This is a geographic number. I, as a end-user decide now to 
opt-in ENUM, so I get a delegation in e164.arpa

Now the cable operator goes VoIP and also decides to peer
with another cable operator via "provider" ENUM. The two
(or more) providers decide to use a separate tree, because they
cannot do this in User ENUM (I and others are already there).

I could now decide to port the number from UPC to Telekom Austria.
This causes the entry in "provider" ENUM either to be removed, or
changed to Telekom Austria (if Telekom Austria is also using this tree).

My entry in User ENUM is unchanged.

They only way to avoid a conflict is a provider using a block in a new number
range dedicated for VoIP and selling these numbers together with the ENUM
entry (that is, the user is at subscrption time declaring to opt-in ENUM)

or the provider is selling single numbers together with ENUM opt-in.

Richard


	-----UrsprÃngliche Nachricht----- 
	Von: Adrian Georgescu [mailto:ag at ag-projects.com] 
	Gesendet: Di 06.07.2004 19:41 
	An: James Seng 
	Cc: enum at ietf.org 
	Betreff: Re: [Enum] IETF, ENUM and NGN
	
	

	For my understanding, user ENUM consists of already existing telephone
	numbers already in use by end-users. Provider ENUM consists of blocks
	of numbers assigned to providers which in term get assigned to
	end-users.
	
	These number ranges if PROPERLY delegated based on existing E164
	numbering plans in place in each country do NOT overlap so they could
	stay in the same tree. Or do they?
	
	Adrian
	
	
	

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