Introduction to telephony

Target audience:

Those responsible for the maintenance of private or public telephony systems.

 

Course prerequisites:

An understanding of the basic principles of data communications. It is recommended that the PTT course "Data communications principles" is studied in preparation for this course.

 

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

• describe the role of the processes involved in making a telephone call including signalling, routing, resource allocation, call control, and billing.
• explain the functions of signalling including setting up and releasing transmission resources, sending address information and capability negotiation.
• describe the need for, and role of, authentication, authorisation and accounting.
• compare the structure, components, and operation of telephony systems using circuit switching with those employing voice over IP techniques.
• describe the factors that affect the quality of service (QofS) provided for telephone calls and measures taken to maximise QofS.
• describe the format of numbering conforming to the E.164 standard, its relationship to the routing of calls and the allocation of number ranges.
• describe the call routing processes and functional components involved in routing calls including those involving special services, call forwarding, emergency calls, and those to ported numbers.
• describe the role of inbound routing giving examples of its use.
• describe the role of outbound routing with reference to voice polices, PSTN usage records, emergency routes, and least cost routing.
• describe the measures taken to maximise the availability of a telephony service.
• explain the factors that determine the required grade of service provided by a telephony system.

 

Approximate study time: 5 hours 

 

Delivery platform requirements:
To access the course, a computer/tablet running a browser such as Chrome, Safari, Edge etc. is required. The device should have an active Internet connection and a screen resolution of at least 1024x768.