Asterisk: The Definitive Guide by L. Madsen, R. Bryant, J. V. Meggelen
Publisher: O'Reilly Media 2011
ISBN/ASIN: 0596517343
ISBN-13: 9780596517342
This bestselling guide provides a complete roadmap for installing, configuring, and integrating this powerful software with existing phone systems. It has everything you need to know to design a complete VoIP or analog system with little or no Asterisk experience, and no more than rudimentary telecommunications knowledge.
Engineering Electrical Engineering Telecommunications Telephone Systems