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Number Portability in the Global Switched Telephone Network (GSTN): An Overview (RFC3482)

IP.com Disclosure Number: IPCOM000011408D
Original Publication Date: 2003-Feb-01
Included in the Prior Art Database: 2003-Feb-19
Document File: 31 page(s) / 78K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

M. Foster: AUTHOR [+3]

Abstract

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 works-in-progress with the IETF.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 4% of the total text.

Network Working Group                                          M. Foster

Request for Comments: 3482                                    T. McGarry

Category: Informational                                            J. Yu

                                                           NeuStar, Inc.

                                                           February 2003

  Number Portability in the Global Switched Telephone Network (GSTN):

                              An Overview

Status of this Memo

   This memo provides information for the Internet community.  It does

   not specify an Internet standard of any kind.  Distribution of this

   memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2003).  All Rights Reserved.

Abstract

   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 works-in-progress

   with the IETF.

Foster, et al.               Informational                      [Page 1]

RFC 3482      Number Portability in the GSTN: An Overview  February 2003

Table of Contents

   1.  Introduction .................................................  2

   2.  Abbreviations and Acronyms ...................................  4

   3.  Types of Number Portability ..................................  6

   4.  Service Provider Number Portability Schemes ..................  7

       4.1   All Call Query (ACQ) ...................................  8

       4.2   Query on Release (QoR) .................................  9

       4.3   Call Dropback .......................................... 10

       4.4   Onward Routing (OR) .................................... 11

       4.5   Comparisons of the Four Schemes ........................ 11

   5.  Database Queries in the NP Environment ....................... 13

       5.1 ®..