Asterisk is an open source software implementation of a telephone Private Branch Exchange (PBX). Like any PBX, it allows a number of attached telephones to make calls to one another, and to connect to other telephone services including the public switched telephone network (PSTN). Asterisk also supports a wide range of Voice over IP (VoIP) protocols, including SIP and H.323. Asterisk can interoperate with most SIP telephones, acting both as registrar and as a gateway between IP phones and the PSTN.
This book shows readers how to build a telephony system for their home or business using Asterisk. Building Telephony Systems with Asterisk takes readers step-by-step through the process of installing and configuring Asterisk. It shows how to make a deployment plan, and how to create a dial plan. The book also presents example configurations for using Asterisk in three different scenarios: for small and home offices, small businesses, and Hosted PBX.
With an engaging style and excellent way of presenting information, this book makes a complicated subject very easy to understand.
For more information on Building Telephony Systems with Asterisk: www.packtpub.com/asterisk/book"