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Freeswitch 1.6 Cookbook
Freeswitch 1.6 Cookbook

Freeswitch 1.6 Cookbook: Over 45 practical recipes to empower you with the latest FreeSWITCH 1.6 features

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Profile Icon Anthony Minessale II Profile Icon Giovanni Maruzzelli
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€18.99 per month
Full star icon Full star icon Full star icon Full star icon Full star icon 5 (3 Ratings)
Paperback Jul 2015 190 pages 1st Edition
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€17.99 €26.99
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Arrow left icon
Profile Icon Anthony Minessale II Profile Icon Giovanni Maruzzelli
Arrow right icon
€18.99 per month
Full star icon Full star icon Full star icon Full star icon Full star icon 5 (3 Ratings)
Paperback Jul 2015 190 pages 1st Edition
eBook
€17.99 €26.99
Paperback
€32.99
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Free Trial
Renews at €18.99p/m
eBook
€17.99 €26.99
Paperback
€32.99
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Freeswitch 1.6 Cookbook

Chapter 2. Connecting Telephones and Service Providers

In this chapter, we will cover these recipes:

  • Configuring an SIP phone to register with FreeSWITCH
  • Connecting to Skype
  • Configuring an SIP gateway
  • Codec configuration

Introduction

As its name implies, FreeSWITCH will "switch" or "connect" various endpoints together. A part of this switching involves making semi-permanent connections to individual telephones or telephone service providers. Service providers are usually telephone companies (telcos), or Internet Telephony Service Providers (ITSP). Continue reading to learn more about the many ways in which FreeSWITCH can connect your telephone to the world.

The recipes in this chapter will delve into the various ways to connect FreeSWITCH to telephones and service providers. FreeSWITCH can also connect to Skype using mod_skypopen. The last recipe is for advanced users, and discusses the subject of codec negotiation.

Configuring an SIP phone to register with FreeSWITCH

SIP phones, or any SIP devices with the ability to register, are essential in most FreeSWITCH installations for allowing users to communicate with each other. A registration is when a phone or other device informs FreeSWITCH that it is active, and provides information (such as an IP address and port) on how to reach the phone across the network or Internet. FreeSWITCH stores this information for later use to contact that phone.

In this recipe, you will be registering a phone to FreeSWITCH. You will need to enter your credentials into your phone as well as into FreeSWITCH itself (both sides must match).

Getting ready

Ensure that the mod_sofia module is already compiled and loaded (Sofia is the SIP stack). You may also want to know on which IP address your registrations are being accepted.

Follow these steps:

  1. Launch the FreeSWITCH command line interface.
  2. To view the current ports and IPs that you are listening on, type
    sofia status.
    
  3. Review the...

Connecting to Skype

SkypeTM is often the first experience of VoIP for many users, and many of them continue to use it as a voice, chat, and video medium to communicate. While many of its features are available in many other kinds of network and technologies (both proprietary and open), the sheer power of ease of use and installed base makes Skype a mainstay of communication.

FreeSWITCH can be made to fully interact with the Skype Network, for both incoming and outgoing voice calls, and for chat messaging.

Getting ready

The mod_skypopen module is already compiled for Windows users when using the Visual Studio 2008/2010 solution files with the FreeSWITCH source code. Linux users will need to enable mod_skypopen in their FreeSWITCH installation (mod_skypopen is not available for Mac and *BSDs at the moment). To do this, follow these steps:

  1. Install and configure all the prerequisites ("required packages") for your Linux distribution as per http://freeswitch.org/confluence/display/FREESWITCH...

Configuring an SIP gateway

Configuring an SIP gateway allows you to connect with outside carriers or other SIP machines. You can connect with other FreeSWITCH or Asterisk boxes, or upstream carrier SIP trunks.

SIP gateways have many, many options—too many to list here; so, we'll review just a few.

Getting ready

First, you'll need to gather some information about the remote server to which you want to connect. The list generally includes the following:

  • The IP address (or hostname) and a port (the standard port is 5060) of the server that to which you are being connected
  • The username and password (if any)
  • How the carrier/gateway expects Caller ID to be handled (which SIP header the Caller ID should be placed in)
  • Whether registration is required

You'll also need to know the phone number format that your carrier expects when you send calls to them, and in which format they'll send calls to you.

Finally, you'll need to decide which of your existing SIP profiles you want...

Codec configuration

Codec configuration is very versatile in FreeSWITCH. In IP telephony, there are several differing scenarios for negotiating and choosing codecs. To meet the varying demands, FreeSWITCH has several configurable modes of operation as well as runtime variables that can influence how codec negotiation takes place. Typically, the goal should be to reduce transcoding or resampling as much as possible. Transcoding is the case where two sides of the call have different codecs and audio flowing in either direction, which has to be completely decoded and re-encoded to the opposite channel's format. Resampling is similar, but it is required when each side of the call is running at a different sample rate, and the audio has to be "resampled" to the correct rate. One or both of these can be necessary, depending on where you direct your calls to, and how you have your codec configuration set.

Getting ready

The biggest decision to make upfront is late-negotiation or early...

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Description

FreeSWITCH 1.6 Cookbook is written for anyone who wants to learn more about using FreeSWITCH in production. The information is presented in such a way that you can get up and running quickly. The cookbook approach eschews much of the foundational concepts, and instead focuses on discrete examples that illustrate specific features. If you need to implement a particular feature as quickly as possible, then this book is for you.

Who is this book for?

FreeSWITCH 1.6 Cookbook is written for anyone who wants to learn more about using FreeSWITCH in production. The information is presented in such a way that you can get up and running quickly. The cookbook approach eschews much of the foundational concepts, and instead focuses on discrete examples that illustrate specific features. If you need to implement a particular feature as quickly as possible, then this book is for you.

What you will learn

  • Configure users and phones as well as connections to VoIP providers
  • Control FreeSWITCH remotely with the powerful event socket interface
  • Route inbound and outbound calls
  • Insert CDRs into a database
  • Enable texttospeech in your voice applications
  • Set up SSL certificates and release services to WebRTC
  • Write JavaScript WebRTC clients for real time data/video/audio in browsers
  • Grasp the FreeSWITCH security best practices and Lua application programming knowledge

Product Details

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Publication date : Jul 22, 2015
Length: 190 pages
Edition : 1st
Language : English
ISBN-13 : 9781785280917
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Product Details

Publication date : Jul 22, 2015
Length: 190 pages
Edition : 1st
Language : English
ISBN-13 : 9781785280917
Concepts :
Tools :

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Table of Contents

8 Chapters
1. Routing Calls Chevron down icon Chevron up icon
2. Connecting Telephones and Service Providers Chevron down icon Chevron up icon
3. Processing Call Detail Records Chevron down icon Chevron up icon
4. External Control Chevron down icon Chevron up icon
5. PBX Functionality Chevron down icon Chevron up icon
6. WebRTC and Mod_Verto Chevron down icon Chevron up icon
7. Dialplan Scripting with Lua Chevron down icon Chevron up icon
Index Chevron down icon Chevron up icon

Customer reviews

Rating distribution
Full star icon Full star icon Full star icon Full star icon Full star icon 5
(3 Ratings)
5 star 100%
4 star 0%
3 star 0%
2 star 0%
1 star 0%
Sudar Vendan Nov 01, 2016
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Really good enough to learn FS... Definitions for each and every parameters. It is like Mastering FS.Thank you so for the authors who made spoon feed easy.I would recommend this for anyone planning to buy.Amazon.... Thank you.
Amazon Verified review Amazon
Gabriela S Sep 15, 2015
Full star icon Full star icon Full star icon Full star icon Full star icon 5
This is the best guide for freeSWITCH out there, made from the author. Clear, well written is a must for people who wants to start or update about this fantastic system.
Amazon Verified review Amazon
Brian Edgar Sep 19, 2015
Full star icon Full star icon Full star icon Full star icon Full star icon 5
A long awaited supplement to the FreeSWITCH family of books. A must have to stay up-to-date with successful recipes for exploring the features of the best open source telephony (or even any comparison to closed source) product on the planet. Go WebRTC!!
Amazon Verified review Amazon
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