Learn the basics of Voice over IP
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.
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VoIP and the OSI model
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The Nyquist theorem
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Coders and Decoders
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Selecting a Codec
How the voice is packetized, synchronized and controlled using the Real Time Protocol
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Payload identification
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Sequencing
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Timestamping
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Real Time Transport Control Protocol
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RTP header compression
How the sessions are described and negotiated using the Session Description Protocol
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Offer/Answer Model
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SDP Parameters
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Main Parameters
Quiz number 1 – Voice Fundamentals
What are the most common Session Protocols and where they are in use
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Comparing and contrasting Session Protocols SIP, H323,MGCP, Skinny/SCCP,IAX
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Session Initiation Protocol, the de facto standard
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H323, the protocol from ITU
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Media Gateway Control Protocol
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Megaco
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Skinny
SIP
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Introduction to SIP
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SIP Components
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SIP Ladder and Trapezoid
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SIP requests and replies
H323
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H.323 components
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H.323 Protocols
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H.323 Protocol Suite
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H.323 Messages
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H.323 Gatekeepers
Media Gateway Control Protocol
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MGCP Intro
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MGCP Architecture
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Call Setup
Quiz number 2 – Session Protocols
Course Information
Course Instructor
