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Voice over IP systems

PTT - Providers Of Telecoms Training


What will I learn?

This online course describes the functional components and operation of telephony systems based on the Internet Protocol (IP) with emphasis on those employing an IP Multimedia Subsystem (IMS) in a next generation network.

By the end of this course you will be able to:

  • describe the components, facilities and operation of Megaco Voice over IP systems that use the gateway control protocol as specified by the ITU recommendation H.248.
  • describe the role and facilities provided by the various SIGTRAN protocols in relation to the transport of signalling messages between a circuit-switched network and a Voice over IP network.
  • describe the role and facilities provided by the SIP-I and SIP-T protocols with reference to the preservation of PSTN signalling information in a VoIP system.
  • describe the role of, and compare, User ENUM and Carrier ENUM services, with reference to the translation between E.164 telephone numbers and other addressing formats.
  • describe the role of the functional components of an IP Multimedia Sub-system (IMS) and the associated transport control elements of a next generation network.
  • explain the benefits of employing network function virtualisation for the IMS functions.
  • describe the role and operation of a PSTN emulation service based on the use of an IMS with reference to access gateways and the access gateway control function.
  • describe the role of a multi-service access node (MSAN) with reference to the integration of voice, video and Internet services to customers.

What do I need to know?

It is recommended that the trainee has an appreciation of the basic principles of IP telephony before attempting this course. It is recommended that PTT's online course "Voice over IP" is studied before starting 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

VAT at applicable rate will be added for users resident in the EU

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

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Three things to check before you take a course

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  1. What will I be able to do when I've completed the course?
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