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 "IP networks" is studied before attempting this course. Although not a pre-requisite, the study of "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. A screen resolution of at least 1024x768 is necessary.
