Voice over IP course

This course introduces the principles and operation of telephony services that operate over Internet Protocol (IP) networks - Voice over IP (VoIP).

Prerequisites:

An understanding of the operation and use of the Internet protocols. It is recommended that TransNet course F - "IP networks" is studied before attempting this course. Although not a pre-requisite, the study of TAH: "Advanced IP networks", would also aid the understanding of the transmission aspects of a VoIP service.

Summary of topics covered:

Advantages of a Voice over IP (VoIP) service.

Basic principles of carrying voice samples in IP packets.

Effects of network impairments such as delay and jitter on a VoIP service and review of techniques that reduce transmission delays.

Voice encoding and processing inc. echo cancellation, compression and silence suppression, characteristics of encoder types and bandwidth requirements of a VoIP service.

Introduction to VoIP systems inc. introduction to the signalling protocols SIP and H.323, functions of call servers and gateways;

Review of VoIP service parameters inc grade of service, availability and post-dial delay.

Detailed treatment of VoIP systems that employ SIP.

Detailed treatment of VoIP systems that use the H.323 suite of protocols.


Number of modules: 6  
Approximate study time: 6 hours

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