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Chapter 1 A Telephony Revolution 一场电话系统的革命

Asterisk and VoIP: Bridging the Gap Between Traditional and Network Telephony  弥合传统电话与网络电话之间的差距

Massive Change Requires Flexible Technology  大规模变革需要灵活的技术

Asterisk: The Hacker’s PBX 黑客级别的PBX

Asterisk: The Professional’s PBX 专业级别的PBX

The Asterisk Community Asterisk社区

The Business Case 商业案例

Conclusion 结论

Chapter 2 Asterisk Architecture Asterisk架构

Modules 模块化

File Structure 文件结构

The Dialplan 拨号计划

Hardware 硬件

Asterisk Versioning Asterisk 版本

Conclusion 结论

Chapter 3 Installing Asterisk 安装Asterisk

Installation Cheat Sheet 安装备忘录

Distribution Installation 发行版安装

Software Dependencies 软件依赖

Downloading What You Need 下载你需要的

How to Install It 怎么去安装？

Base Configuration 基本配置

Updating Asterisk 更新Asterisk

Common Issues 常见问题

Upgrading Asterisk 升级Asterisk

Conclusion结论

Chapter 4 Initial Configuration Tasks 初始化配置任务

asterisk.conf

modules.conf

indications.conf

musiconhold.conf

Additional Configuration Files 额外的配置文件

Conclusion结论

Chapter 5 User Device Configuration用户终端设备的配置

Telephone Naming Concepts电话命名概念

Hardphones, Softphones, and ATAs硬件电话、软电话和ATAs

Configuring Asterisk配置Asterisk

Digium Phones with Asterisk Digium电话

Loading Your New Channel Configurations加载新的频道配置

Testing to Ensure Your Devices Have Registered测试确保你的设备已经注册成功

Analog Phones模拟电话

A Basic Dialplan to Test Your Devices用基本的拨号计划测试你的终端设备

Under the Hood: Your First Call在引擎盖下你的第一通电话

Conclusion结论

Chapter 6 Dialplan Basics基本的拨号计划

Dialplan Syntax拨号计划的语法

A Simple Dialplan一个简单的拨号计划

Building an Interactive Dialplan创建一个交互式的拨号计划

Conclusion结论

Chapter 7 Outside Connectivity连接外界

The Basics of Trunking基本的中继线

Fundamental Dialplan for Outside Connectivity连接外界的基本拨号计划

PSTN Circuits PSTN电路

VoIP

Emergency Dialing紧急呼叫

Conclusion结论

Chapter 8 Voicemail语音信箱

Comedian Mail滑稽的邮箱

Dialplan Integration拨号计划集成

Storage Backends后台存储

Using Asterisk as a Standalone Voicemail Server将Asterisk打造成一个独立的语音信箱系统

Database Integration数据库集成

Conclusion结论

Chapter 9 Internationalization国际化

Devices External to the Asterisk Server终端设备连接Asterisk服务

PSTN Connectivity, DAHDI, Digium Cards, and Analog Phones连接PSTN,DAHDI，Digium板卡和模拟电话

Asterisk

Conclusion—Easy Reference Cheat Sheet

Chapter 10 Deeper into the Dialplan深入理解拨号计划

Expressions and Variable Manipulation正则表达式与通道变量的操作

Dialplan Functions拨号计划函数

Conditional Branching条件分支

Macros

GoSub

Local Channels本地当前通道

Using the Asterisk Database (AstDB)使用AstDB数据库

Handy Asterisk Features方便的Asteris功能

Conclusion结论

Chapter 11 Parking, Paging, and Conferencing停泊，暂停与会议

features.conf

Overhead and “Underchin” Paging (a.k.a. Public Address)

Advanced Conferencing高级会议功能

Conclusion结论

Chapter 12 Internet Call Routing呼叫路由

DNS and SIP URIs

ENUM and E.164

ISN, ITAD, and freenum.org

Security and Identity安全与身份

Conclusion结论

Chapter 13 Automatic Call Distribution (ACD) Queues ACD队列

Creating a Simple ACD Queue

Queue Members

The queues.conf File

The agents.conf File

Advanced Queues

Queue Statistics: The queue_log File

Conclusion

Chapter 14 Device States

Device States

Extension States

SIP Presence

Using Custom Device States

Distributed Device States

Shared Line Appearances

Creating a Callback Service

Conclusion

Chapter 15 The Automated Attendant

An Auto Attendant Is Not an IVR

Designing Your Auto Attendant

Building Your Auto Attendant

Conclusion

Chapter 16 Relational Database Integration

Installing and Configuring PostgreSQL and MySQL

Installing and Configuring ODBC

Managing Databases

Powering Your Dialplan with func_odbc

A Gentle Introduction to func_odbc

Getting Funky with func_odbc: Hot-Desking

Using Realtime

Storing Call Detail Records (CDR)

ODBC Voicemail Message Storage

Database Integration of ACD Queues

Conclusion

Chapter 17 Interactive Voice Response

What Is IVR?

Components of an IVR

IVR Design Considerations

Asterisk Modules for Building IVRs

A Simple IVR Using CURL

A Prompt-Recording Application

Speech Recognition and Text-to-Speech

Conclusion

Chapter 18 External Services

Calendar Integration

Voicemail IMAP Integration

Using XMPP (Jabber) with Asterisk

Out-of-Band Messaging (Messaging Infrastructure)

LDAP Integration

Text-to-Speech Utilities

Conclusion

Chapter 19 Fax

What Is a Fax?

Ways to Handle Faxes in Asterisk

spandsp

Digium Fax For Asterisk

Incoming Fax Handling

Outgoing Fax Handling

Fax Pass-Through

Conclusion

Chapter 20 Asterisk Manager Interface (AMI)

Quick Start

Configuration

Protocol Overview

Call Files

Example Usage

Development Frameworks

Interesting Applications

Conclusion

Chapter 21 Asterisk Gateway Interface (AGI)

Quick Start

AGI Variants

AGI Communication Overview

Example: Account Database Access

Development Frameworks

Conclusion

Chapter 22 Clustering

Traditional PBXs

Hybrid Systems

Pure Asterisk, Nondistributed

Asterisk and Database Integration

Asterisk and Distributed Device States

Multiple Queues, Multiple Sites

Conclusion

Chapter 23 Distributed Universal Number Discovery (DUNDi)

How Does DUNDi Work?

The dundi.conf File

Configuring Asterisk for Use with DUNDi

Conclusion

Chapter 24 System Monitoring and Logging

logger.conf

Call Detail Records

CEL (Channel Event Logging)

SNMP

Conclusion

Chapter 25 Web Interfaces

Flash Operator Panel

Queue Status and Reporting

Call Detail Records

A2Billing

Conclusion

Chapter 26 Security

Scanning for Valid Accounts

Authentication Weaknesses

Fail2ban

Encrypted Media

Dialplan Vulnerabilities

Securing Asterisk Network APIs

IAX2 Denial of Service

Other Risk Mitigation

CLI Permissions

Resources

Conclusion—A Better Idiot

Chapter 27 Asterisk: A Future for Telephony

The Problems with Traditional Telephony

Paradigm Shift

The Promise of Open Source Telephony

The Future of Asterisk

Appendix Understanding Telephony

Analog Telephony

Digital Telephony

The Digital Circuit-Switched Telephone Network

Packet-Switched Networks

Conclusion

Appendix Protocols for VoIP

The Need for VoIP Protocols

VoIP Protocols

Codecs

Quality of Service

Echo

Asterisk and VoIP

VoIP Security

Conclusion

Appendix Preparing a System for Asterisk

Server Hardware Selection

Environment

Telephony Hardware

Types of Phones

Linux Considerations

Conclusion

Colophon