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What will I learn?

This online course provides a detailed treatment of the principles and operation of telephony services that operate over Internet Protocol (IP) networks - Voice over IP (VoIP).

This course is suitable for those responsible for the maintenance of IP-based networks that provide telephony services

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.

This online course includes assessments, the results of which are summarised in a certificate published at course completion.

What do I need to know?

An understanding of the operation and use of the Internet protocols. It is recommended that the PTT online course "IP networks" is studied before attempting this course.

Course info


Course Provider Diploma/Certificate/Award (this must include an assessed element)

Study Hours

Variable - to suit the learner

Study mode




Total time for completion

12 months

More info on price

£150 per year. Single user annual licence

Who runs this course?



PTT – Providers of telecommunications training – is a specialist distance learning provider that focusses on telecommunications and Information communications technology (ICT). PTT’s extensive catalogue of online courses offer a valuable training and information resource for those joining the telecoms and ICT sectors as well as managers, technicians and engineers who need to keep up to date with the latest techniques and systems. Apart from standalone courses, PTT also offers online study programmes that reward successful participants with a certificate. PTT courses and study programmes are used throughout the world by major telecommunications and ICT organisations to train their staff as well as individuals wanting to

Three things to check before you take a course

Three things to check before you take a course

Great! You've found a course. Still have a few questions? Here are the top three things you should ask the course provider before booking:

  1. What will I be able to do when I've completed the course?
  2. Do I need any previous experience or qualifications to take this course?
  3. Will I need any special equipment or clothing in order to complete it?

They'll also be able to help you with questions around payment plans, flexible learning, start dates and more.

Click the green 'GET COURSE INFO' button to get in touch with the them directly.

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