[Enum] I-D ACTION:draft-ietf-enum-e164-gstn-np-04.txt

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This draft is a work item of the Telephone Number Mapping Working Group of the IETF.

	Title		: Number Portability in the GSTN: An Overview
	Author(s)	: M. Foster, T. McGarry, J. Yu
	Filename	: draft-ietf-enum-e164-gstn-np-04.txt
	Pages		: 27
	Date		: 17-Jun-02
	
This document provides an overview of E.164 telephone number 
portability (NP) in the Global Switched Telephone Network (GSTN).    
NP is a regulatory imperative seeking to liberalize local telephony 
service competition, by enabling end-users to retain telephone 
numbers while changing service providers.  NP changes the 
fundamental nature of a dialed E.164 number from a hierarchical 
physical routing address to a virtual address, thereby requiring the 
transparent translation of the later to the former.  In addition, 
there are various regulatory constraints that establish relevant 
parameters for NP implementation, most of which are not network 
technology specific.  Consequently, the implementation of NP 
behavior consistent with applicable regulatory constraints, as well 
as the need for interoperation with the existing GSTN NP 
implementations, are relevant topics for numerous areas of IP 
telephony work-in-progress at IETF.

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