This course discusses the theory of telecommunications.

The term “telecommunication” is derived from the Greek stem “tele” meaning “at a distance” and the word “communication” meaning “the science and practice of transmitting the information.” Telecommunications plays a vital role in international commerce and in industrialized nations it is an accepted necessity.

The advent of wireless services gives an enormous impact on the growth of telecommunications networks. In industrialized countries, they are used increasingly for mobile business communications. also, the services follow several principles such as the telecommunication networks are used to provide services to the users. Service requires the execution of a series of programs by the originating and destination entities. The services are decomposed into different layers by the initiating entity, where each layer undertakes a specified portion of the overall service.

This makes the services more manageable and allows interoperability between vendors. The open systems interconnection (OSI) reference model explains this layered

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