Asterisk 1.6电子书

Asterisk 1.6

Table of Contents

Asterisk 1.6

Credits

About the Authors

About the Reviewer

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Downloading the example code for the book

Errata

Piracy

Questions

1. Introduction to Asterisk

What is Asterisk?

What's new in Asterisk 1.4?

What's new in Asterisk 1.6?

Asterisk is a PBX

Extension-to-Extension calls

Line trunking

Telco features

Advanced Call Distribution

Call Detail Records

Call recording

Call parking

Call barging

Asterisk is an IVR system

Asterisk is a call center system

Asterisk is a voicemail system

Asterisk is a Voice over IP (VoIP) system

Asterisk 1-2-3

Asterisk scalability

Asterisk does not run on Windows

Is Asterisk a good fit for me?

Trade-offs

Flexibility versus ease of use

Graphical versus configuration file management

Calculating total cost of ownership

Return on Investment

Summary

2. Making a Plan for Deployment

The Public Switched Telephony Network (PSTN)

Connection methods

Plain Old Telephone Service (POTS) line

Integrated Services Digital Network (ISDN)

T1 or E1

Voice over IP connections

Determining our needs

Terminal equipment

Types of terminal devices

Hard phones

H.323

SIP

IAX

Soft phones

Analog adapters

Another PBX

Choosing a device

Features, features, and more features...

Requirement elicitation

Requirement prioritization

Requirement documentation

Phone testing

Determining true cost

Compatibility with Asterisk

Sound quality analysis

Usability issues

Recording decisions

How much hardware do I need?

Choosing the extension length

Preparing a test environment

Summary

3. Installing Asterisk

Preparing to install Asterisk

Obtaining the source files

Installing DAHDI

Installing LibPRI (optional)

Installing Asterisk

Getting to know Asterisk

Summary

4. Configuring Asterisk

DAHDI interfaces

system.conf

Lines

Terminals

chan_dahdi.conf

Lines

Terminals

SIP interfaces

IAX interfaces

Voicemail

Music on hold

Queues

Conference rooms

Summary

5. Creating a Dialplan

Creating a context

Creating an extension

Creating outgoing extensions

Advanced Call Distribution

Call queues

Call parking

Direct Inward Dialing (DID)

Automated attendants

System services

Summary

6. Quality Assurance

Call Detail Records

Flat-file CDR logging

Database CDR logging

Monitoring calls

Recording calls

Legal concerns

Summary

7. Making Asterisk Easy to Manage

Trixbox

CentOS

Trixbox preparation and installation

What is FreePBX?

FreePBX preparation and installation

FreePBX System Status Dashboard

Tools

Setup

Trixbox maintenance section

Reports

Asterisk Recording Interface

Flash Operator Panel (FOP)

Flash operator configuration files

Web MeetMe

Setting up and accessing Web MeetMe through Trixbox

Flexibility when needed

A simple one-to-one PBX

Extensions

Trunks

Routes

Summary

8. What is asterCRM?

Installing asterCRM

Automatic installation

Manual installation

Introducing asterCRM

Import

Statistic

Extension

Customer

Dialer

System

Survey

Summary

9. Case Studies

Small office/home office

The scenario

The discussion

The configuration

system.conf

chan_dahdi.conf

musiconhold.conf

voicemail.conf

modules.conf

extensions.conf

Conclusions

Small business

The scenario

The discussion

The configuration

system.conf

chan_dahdi.conf

musiconhold.conf

agents.conf

queues.conf

sip.conf

meetme.conf

voicemail.conf

extensions.conf

Conclusions

Hosted PBX

The scenario

The discussion

The configuration

system.conf

chan_dahdi.conf

musiconhold.conf

sip.conf

voicemail.conf

extensions.conf

Conclusions

Summary

10. Maintenance and Security

Backup and system maintenance

Backing up configurations

Backing up voice data

Backing up log files

Backup scripts

Time synchronization

Adding it all to cron

Back up Asterisk with FreePBX

Back up Asterisk with Trixbox

Rebuilding and restoring the Asterisk server

Disaster Recovery Plan (DRP)

Asterisk server security

Internal access control

Host security hardening for Asterisk

Integrity checker

Rootkit detection

Automated hardening

Role Based Access Control (RBAC)

Network security for Asterisk

Firewalling the Asterisk protocols

SIP (Session Initiation Protocol)

H.323

IAX

The Real-Time Transport Protocol (RTP)

Controlling administration of Asterisk

Asterisk scalability

Load balancing with DNS

Support channels for Asterisk

Mailing lists

Forums

Internet Relay Chat (IRC)

Web sites

Digium

Summary

Index