MAB: Voice over IP
This course introduces the principles, operation and applications of telephony services that operate over Internet Protocol (IP) networks - Voice over IP (VoIP).
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Target audience:
This PTT online course is aimed at those responsible for the design or maintenance of Voice over IP systems.
Course prerequisites:
You will get the most out of this course if you already understand the operation and use of the Internet protocols. It is recommended that TAF: "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.
Course objectives:
By the end of this course you will be able to:
- explain the advantages of a Voice over IP (VoIP) service.
- describe the basic principles of carrying voice samples in IP packets.
- describe the effects of network impairments such as delay and jitter on a VoIP service and describe the techniques that reduce transmission delays.
- describe voice encoding and processing techniques inc. echo cancellation, compression and silence suppression.
- describe the characteristics of various encoder types.
- explain the factors that determine the bandwidth requirements of a VoIP service.
- describe the role of the signalling protocols SIP and H.323 and the functions of call servers and gateways.
- explain the significance of VoIP service parameters inc grade of service, availability and post-dial delay.
- describe the role and the relationship between the DiffServ, RSVP and MPLS protocols in providing an improved quality of service for VoIP calls.
- describe the components, protocols and operation of signalling systems using the Session Initiation Protocol (SIP).
- describe the role of the Session Description Protocol (SDP).
- describe the components, protocols and operation of signalling systems conforming to the ITU H.323 family of recommendations.
- explain how public telephony services can be provided using VoIP.
- describe the provision of VoIP telephony and video conferencing for businesses and explain some of the barriers to VoIP provision.
Number of modules: 7
Approximate study time: 7 hours
Download and view the course specification in Adobe PDF format
Delivery platform requirements:
To access the course, a computer running a browser such as Google Chrome, Safari etc is required. The computer should have Internet access and be running Adobe Flash. A screen resolution of at least 1024x768 is necessary.
