ABSTRACT: Technology - Webster's New Collegiate Dictionary defines it as a "technical method of achieving a practical purpose." A concise, clear definition. But for many, achieving that practical purpose can be more than just a challenge. It can be frustrating, intimidating, time-consuming, and bound to generate the question, "Where Do I Start?"

With the Telcordia Notes On.... series, Telcordia Technologies has devised a starting point for your search through the rapidly developing world of telecommunications. Written by the authors of the successful Notes On the Networks document SR-2275, this series similarly contains technical material of interest to engineering and planning groups, as well as descriptions of the characteristics and background of these subjects in layman's terms. The difference is that Telcordia Notes On.... zeroes in on one technology in each document and breaks it down into manageable terms. From the history, background, and basic elements through a discussion of what the future may bring, our subject matter experts cover the important aspects in as few words as possible.

This Special Report in the Telcordia Notes On....series takes an in-depth look at Number Portability and Number Pooling. The document provides a history of regulatory decisions prompting the introduction of Number Portability and Number Pooling into U.S. networks. It also describes the underlying components and technologies used to provide Service Provider Portability in domestic wireline networks, and reviews issues and requirements development for Location Portability and some of the factors inhibiting its deployment. The document also reviews other Number Portability technologies in use or proposed for use such as Wireless Number Portability and international solutions. A description of the underlying components and technologies that will be used to provide Thousand-Block Number Pooling in domestic wireline networks is included as well as future trends for Number Portability and Number Pooling.