This work is a practical cost management guide to the complex world of voice, data and wireless telecommunications for the non-technical business professional. It sifts through all the technical jargon, and offers a comprehensive education on the applications, services and procurement of telecom products, and provides a strategy to effectively manage the costs of those products and services. This reference enables professionals to: understand telecom services; audit phone bills; reduce the cost of existing services and eliminate unnecessary ones; and efficiently negotiate new contracts and services. It explains the way in which the providers of telecommunications services interwork and compete, focusing on pricing structures and options. Each section contains cost management advice, explains the technologies and service offerings of the carriers, and illustrates complex concepts with case studies of companies in today's marketplace.