Voice over IP Fundamentals

What you'll learn:
Voice over IP
Session Protocols

Requirements
TCP/IP

Description
In the last year I have thought this course twice to companies who were starting a new VoIP project. It is an interesting training for those who have little knowledge of telephony and voice over IP networks.

When I started with open source PBXs in 2004, one of the things I've noticed is, most people working with open source telephony do not have a background on VoIP protocols.

I believe this training will never be ready, there will always new devices and new technologies to cover. So I plan to update it regularly. As you have lifetime access, you will always receive the updates.

** This training is purely theoretical, no practical exercises will be applied **

VoIP Fundamentals

Here we will present the basics of VoIP

How voice is encoded digitally. In this chapter we are going to see the basics on how the voice is encoded according to the theorem of Nyquist.

VoIP and the OSI model

The Nyquist theorem

Coders and Decoders

Selecting a Codec

How the voice is packetized, synchronized and controlled using the Real Time Protocol

Payload identification

Sequencing

Timestamping

Real Time Transport Control Protocol

RTP header compression

How the sessions are described and negotiated using the Session Description Protocol

Offer/Answer Model

SDP Parameters

Main Parameters

Quiz number 1 - Voice Fundamentals

What are the most common Session Protocols and where they are in use

Comparing and contrasting Session Protocols SIP, H323,MGCP, Skinny/SCCP,IAX

Session Initiation Protocol, the de facto standard

H323, the protocol from ITU

Media Gateway Control Protocol

Megaco

Skinny

SIP

Introduction to SIP

SIP Components

SIP Ladder and Trapezoid

SIP requests and replies

H323

H.323 components

H.323 Protocols

H.323 Protocol Suite

H.323 Messages

H.323 Gatekeepers

Media Gateway Control Protocol

MGCP Intro

MGCP Architecture

Call Setup

Quiz number 2 - Session Protocols

Who this course is for
VoIP professionals and beginners