Asterisk TM : the definitive guide / Russell Bryant, Leif Madsen, and Jim Van Meggelen.

Format:

Book

Author/Creator:

Bryant, Russell.

Contributor:

Madsen, Leif.

Meggelen, Jim Van.

Language:

English

Subjects (All):

Asterisk (Computer file).

Internet telephony--Computer programs.

Internet telephony.

Physical Description:

1 online resource (845 p.)

Edition:

Fourth edition.

Place of Publication:

Sebastopol : O'Reilly, 2013.

Language Note:

English

System Details:

text file

Summary:

Design a complete Voice over IP (VoIP) or traditional PBX system with Asterisk, even if you have only basic telecommunications knowledge. This bestselling guide makes it easy, with a detailed roadmap that shows you how to install and configure this open source software, whether you’re upgrading your existing phone system or starting from scratch. Ideal for Linux administrators, developers, and power users, this updated edition shows you how to write a basic dialplan step-by-step, and brings you up to speed on the features in Asterisk 11, the latest long-term support release from Digium. You’ll quickly gain working knowledge to build a simple yet inclusive system. Integrate Asterisk with analog, VoIP, and digital telephony systems Build an interactive dialplan, using best practices for more advanced features Delve into voicemail options, such as storing messages in a database Connect to external services including Google Talk, XMPP, and calendars Incorporate Asterisk features and functions into a relational database to facilitate information sharing Learn how to use Asterisk’s security, call routing, and faxing features Monitor and control your system with the Asterisk Manager Interface (AMI) Plan for expansion by learning tools for building distributed systems

Contents:

Intro

Copyright

Table of Contents

Foreword

Matt Jordan (Engineering Manager, Digium)

Alex Balashov (Principal, Evariste Systems)

Kevin McAllister (VP of Engineering, CoreDial, LLC)

Brian Capouch (Computer Science Department, Saint Joseph's College [Indiana])

Preface

Audience

Organization

Software

Conventions Used in This Book

Using Code Examples

Safari® Books Online

How to Contact Us

Acknowledgments

Leif Madsen

Jim Van Meggelen

Russell Bryant

Chapter 1. A Telephony Revolution

Asterisk and VoIP: Bridging the Gap Between Traditional and Network Telephony

The Zapata Telephony Project

Massive Change Requires Flexible Technology

Asterisk: The Hacker's PBX

Asterisk: The Professional's PBX

The Asterisk Community

The Asterisk Mailing Lists

Asterisk Wiki Sites

The IRC Channels

Asterisk User Groups

The Asterisk Documentation Project

The Business Case

Conclusion

Chapter 2. Asterisk Architecture

Modules

Applications

Bridging Modules

Call Detail Recording Modules

Channel Event Logging Modules

Channel Drivers

Codec Translators

Format Interpreters

Dialplan Functions

PBX Modules

Resource Modules

Add-on Modules

Test Modules

File Structure

Configuration Files

The Resource Library

The Spool

Logging

The Dialplan

Hardware

Asterisk Versioning

Previous Release Methodologies

The Current Release Methodology

Simplifying the Version Numbers

Chapter 3. Installing Asterisk

Installation Cheat Sheet

Distribution Installation

RHEL Server

Ubuntu Server

Software Dependencies

Downloading What You Need

Getting the Source via Subversion

Getting the Source via wget

How to Install It

DAHDI

LibPRI

Asterisk

Setting File Permissions.

Base Configuration

Initial Configuration

make menuselect

Updating Asterisk

Common Issues

-bash: wget: command not found

configure: error: no acceptable C compiler found in PATH

make: gcc: command not found

configure: error: C++ preprocessor "/lib/cpp" fails sanity check

configure: error: *** Please install GNU make. It is required to build Asterisk!

configure: *** XML documentation will not be available because the 'libxml2' development package is missing.

configure: error: *** termcap support not found

You do not appear to have the sources for the 2.6.18-164.6.1.el5 kernel installed.

E: Unable to lock the administration directory (/var/lib/dpkg/), are you root?

Upgrading Asterisk

Chapter 4. Initial Configuration Tasks

asterisk.conf

The [directories] Section

The [options] Section

The [files] Section

The [compat] Section

modules.conf

The [modules] Section

indications.conf

musiconhold.conf

Converting Music to a Format That Works Best with Asterisk

Default musiconhold.conf file

Additional Configuration Files

Chapter 5. User Device Configuration

Telephone Naming Concepts

Hardphones, Softphones, and ATAs

Configuring Asterisk

How Channel Configuration Files Work with the Dialplan

sip.conf

iax.conf

Modifying Your Channel Configuration Files for Your Environment

Digium Phones with Asterisk

Loading Your New Channel Configurations

The Asterisk CLI

Testing to Ensure Your Devices Have Registered

Analog Phones

A Basic Dialplan to Test Your Devices

Under the Hood: Your First Call

Chapter 6. Dialplan Basics

Dialplan Syntax

Contexts

Extensions

Priorities

The Answer(), Playback(), and Hangup() Applications

A Simple Dialplan.

Hello World

Building an Interactive Dialplan

The Goto(), Background(), and WaitExten() Applications

Handling Invalid Entries and Timeouts

Using the Dial() Application

Using Variables

Pattern Matching

Includes

Chapter 7. Outside Connectivity

The Basics of Trunking

Fundamental Dialplan for Outside Connectivity

PSTN Circuits

Traditional PSTN Trunks

Installing PSTN Trunks

VoIP

Coping with Network Address Translation

PSTN Termination

PSTN Origination

VoIP to VoIP

Configuring VoIP Trunks

Emergency Dialing

Chapter 8. Voicemail

Comedian Mail

The [general] Section

The [zonemessages] Section

The Contexts Section

An Initial voicemail.conf File

Standard Voicemail KeyMap

Dialplan Integration

The VoiceMail() Dialplan Application

The VoiceMailMain() Dialplan Application

Creating a Dial-by-Name Directory

Using a Jitterbuffer

Storage Backends

Linux Filesystem

ODBC

IMAP

Using Asterisk as a Standalone Voicemail Server

Integrating Asterisk into a SIP Environment as a Standalone Voicemail Server

SMDI (Simplified Message Desk Interface)

Database Integration

Chapter 9. Internationalization

Devices External to the Asterisk Server

PSTN Connectivity, DAHDI, Digium Cards, and Analog Phones

DAHDI Drivers

Caller ID

Language and/or Accent of Prompts

Time/Date Stamps and Pronunciation

Conclusion-Easy Reference Cheat Sheet

Chapter 10. Deeper into the Dialplan

Expressions and Variable Manipulation

Basic Expressions

Operators

Syntax

Examples of Dialplan Functions

Conditional Branching

The GotoIf() Application

Time-Based Conditional Branching with GotoIfTime()

Macros

Defining Macros

Calling Macros from the Dialplan.

Using Arguments in Macros

GoSub

Defining Subroutines

Calling Subroutines from the Dialplan

Using Arguments in Subroutines

Returning from a Subroutine

Local Channels

Using the Asterisk Database (AstDB)

Storing Data in the AstDB

Retrieving Data from the AstDB

Deleting Data from the AstDB

Using the AstDB in the Dialplan

Creating a Hot-Desking Application with AstDB

Handy Asterisk Features

Zapateller()

Call Parking

Conferencing with MeetMe()

Conferencing with ConfBridge()

Chapter 11. Parking, Paging, and Conferencing

features.conf

The [general] section

The [featuremap] Section

The [applicationmap] Section

Application Map Grouping

Parking Lots

Overhead and "Underchin" Paging (a.k.a. Public Address)

Places to Send Your Pages

Zone Paging

Advanced Conferencing

Options for User Profiles

Options for Bridge Profiles

ConfBridge Menu Options

Enabling a PIN

Waiting for the Marked User to Join

Using ConfBridge() Menus

Enabling Videoconferencing

Chapter 12. Internet Call Routing

DNS and SIP URIs

The SIP URI

SRV Records

Accepting Calls to Your System

Dialing SIP URIs from Asterisk

ENUM and E.164

E.164 and the ITU

ENUM

Asterisk and ENUM

ISN, ITAD, and freenum.org

Got ISN?

ITAD Subscriber Numbers (ISNs)

Management of Internet Numbering

IP Telephony Administrative Domains (ITADs)

Create a DNS Entry for Your ITAD

Testing Your ITAD

Using ISNs in Your Asterisk System

Security and Identity

Toll Fraud

Spam over Internet Telephony (SPIT)

Distributed Denial of Service Attacks

Phishing

Security Is an Ongoing Process

Chapter 13. Automatic Call Distribution (ACD) Queues

Creating a Simple ACD Queue

Queue Members.

Controlling Queue Members via the CLI

Defining Queue Members in the queues.conf File

Controlling Queue Members with Dialplan Logic

Automatically Logging Into and Out of Multiple Queues

An Introduction to Device State

The queues.conf File

The agents.conf File

Advanced Queues

Priority Queue (Queue Weighting)

Queue Member Priority

Changing Penalties Dynamically (queuerules.conf)

Announcement Control

Overflow

Using Local Channels

Queue Statistics: The queue_log File

Chapter 14. Device States

Device States

Checking Device States

Extension States

Hints

Checking Extension States

SIP Presence

Asterisk Configuration

Using Custom Device States

An Example

Distributed Device States

Using Corosync

Using XMPP

Shared Line Appearances

Installing the SLA Applications

Configuration Overview

Key System Example with Analog Trunks

Key System Example with SIP Trunks

Alternate Key System Example with SIP Trunks

Shared Extension Example

Additional Configuration

Limitations

Creating a Callback Service

Chapter 15. The Automated Attendant

An Auto Attendant Is Not an IVR

Designing Your Auto Attendant

The Greeting

The Main Menu

Timeout

Invalid

Dial by Extension

Building Your Auto Attendant

Recording Prompts

Delivering Incoming Calls to the Auto Attendant

IVR

Chapter 16. Relational Database Integration

Installing and Configuring PostgreSQL and MySQL

Installing PostgreSQL for RHEL

Installing PostgreSQL for Ubuntu

Installing MySQL for RHEL

Installing MySQL for Ubuntu

Configuring PostgreSQL

Configuring MySQL

Installing and Configuring ODBC

Configuring ODBC for PostgreSQL

Configuring ODBC for MySQL

Configuring ODBC for Microsoft SQL.

Validating the ODBC Connector.

Notes:

Includes index.

Description based on online resource; title from PDF title page (ebrary, viewed September 22, 2013).

ISBN:

9781449332433

1449332439

9781449332464

1449332463

OCLC:

861532360