A good way to explain NAT to someone who could absolutely care less about techno-babble would be with an analogy. Think of a giant office building and its mailroom. An employee on the 10th floor sends a package to you by dropping it off at the mailroom on the ground floor. The package is passed on to the Postal service and it arrives at your house. The return address on the package is actually the address of the entire office building and not the tiny office on the 10th floor. Now say you need to return the package. You put it back through the Postal system and it arrives at the building and the employees in the mailroom must figure out where to deliver the package by mapping your name or office number to the location in the building, and then they take it back up to the employee on the 10th floor. The mailroom is like a NAT router because it proxies the mail between the actual Postal system and the one inside the building. The offices are like the LAN addresses...
FreeSWITCH 1.2 - Second Edition
FreeSWITCH 1.2 - Second Edition
Overview of this book
FreeSWITCH is an open source telephony platform designed to facilitate the creation of voice and chat-driven products, scaling from a soft-phone to a PBX and even up to an enterprise-class soft-switch. It is always exciting to design and build your own telephony system to suit your needs, but the task is time-consuming and involves a lot of technical skill."FreeSWITCH 1.2" comes to your rescue to help you set up a telephony system quickly and securely using FreeSWITCH. It is rich with practical examples and will give you all of the information and skills needed to implement your own PBX system.You will start with a detailed description of the FreeSWITCH system architecture. Thereafter you will receive step-by-step instructions on how to set up basic and advanced features for your telephony platform.The book begins by introducing the architecture and workings of FreeSWITCH before detailing how to plan a telephone system and then moves on to the installation, configuration, and management of a feature-packed PBX. You will learn about maintaining a user directory, XML dial plan, and advanced dial plan concepts, call routing, and the extremely powerful Event Socket. You will finally learn about the online community and history of FreeSWITCH."FreeSWITCH 1.2" is an indispensable tool for novice and expert alike.
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FreeSWITCH 1.2 - Second Edition
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Table of Contents (24 chapters)
FreeSWITCH 1.2
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Free Chapter
Architecture of FreeSWITCH
Building and Installation
Test Driving the Example Configuration
SIP and the User Directory
Understanding the XML Dialplan
Using XML IVRs and Phrase Macros
Dialplan Scripting with Lua
Advanced Dialplan Concepts
Moving Beyond the Static XML Configuration
Controlling FreeSWITCH Externally
Web-based Call Control with mod_httapi
Handling NAT
VoIP Security
Advanced Features and Further Reading
The FreeSWITCH Online Community
Migrating from Asterisk to FreeSWITCH
The History of FreeSWITCH
Index
Customer Reviews