Informaticos

The Asterisk Handbook Version 2
Mark Spencer Mack Allison Christopher Rhodes The Asterisk Documentation Team Last Edit Date: 3/30/03

The Asterisk Handbook The Asterisk Handbook Version 2 About this book Authors: Mark Spencer Mack Allison Christopher Rhodes The Asterisk Documentation Team Special thanks to all the users, contributers, and developers who have made Asterisk a reality.Copyright © 2003 Digium, Inc. All rights reserved. This document may not be duplicated, copied, or redistributed in any form, electronic or physical, without the prior written consent of Digium, Inc. The latest version of this document may be downloaded for free from http://www.digium.com. This book was created using OpenOffice, available at http://www.openoffice.org.

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The AsteriskHandbook

1. Chapter 1: Introduction......................................................................5 1.1 What is Asterisk?.........................................................................5 1.2 Obtaining Asterisk.......................................................................6 1.3 Licensing......................................................................................6 1.4Supported Technologies..............................................................7 1.4.1 Zaptel Pseudo TDM interfaces............................................7 1.4.2 Non-Zaptel hardware interfaces..........................................8 1.4.3 Packet voice protocols.........................................................8 1.5Contributing.................................................................................8 1.5.1 Code Contributions..............................................................9 1.5.2 Documentation Contributions.............................................9 1.5.3 Asterisk IRC Channel and Mailing List...........................10 1.5.4 Supporting Asterisk Sponsors...........................................10 1.5.5 Core DeveloperWishlists..................................................10 2. Chapter 2: Asterisk's Architecture...................................................11 2.1 Asterisk Architecture Overview................................................11 2.2 Detailed Asterisk Architecture..................................................11 2.3 Network Examples.....................................................................122.3.1 The Mythical 1x1 PBX......................................................12 2.3.2 An 8x16 Small Office PBX...............................................13 2.3.3 SME with Remote Offices.................................................14 2.3.4 High Density IVR and Conferencing................................14 2.4 FilesystemOrganization............................................................15 2.5 Naming Channels.......................................................................17 2.5.1 Zap: Zaptel TDM Channels...............................................18 2.5.2 SIP: Session Initiation Protocol Channels........................19 2.5.3 IAX: Inter-Asterisk eXchange Channels..........................19 3. Chapter 3: RunningAsterisk...........................................................21 3.1 Asterisk Command Line Arguments........................................21 3.2 Asterisk Command Line Interface............................................23 4. Chapter 4: The Asterisk Dialplan....................................................25 4.1 Introduction to Extension Contexts..........................................25 Page 3

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The Asterisk Handbook 4.1.1 Extension Contexts Uses...................................................25 4.1.2 Basic Extension Context....................................................26 4.1.3 Sample Voice Menu...........................................................26 4.1.4 Pattern Matching................................................................27 4.1.5 Context...