Telecommunications Principles

2 days

An introduction to the concepts and principles involved in the transfer of voice signals. Introduces the basic concepts of Analogue voice, signalling and switching. It also looks at some of the processes that have evolved including Echo suppression and cancellation.

Basic Telephony
Outlines the history of the telephone, and looks at the concepts behind the handset and the circuitry that makes up the local loop. Introduces the concept of multiplexing using frequency (FDM) in the public telephone network.

Digital Transmission
Introduces the concept of digital signals and how analogue to digital conversion is used in telephony. This section also outlines the concepts behind Time Division Multiplexing, G.703/G.704 framing and the basics of PDH and SDH transmission.

Transmission Media
Introduces the physical media which are used to transmit telephony signals and the characteristics involved in the process. Includes Copper cabling, Fibre cabling and Radio transmission.

The transmission of telephony through a network involves a large element of signalling to control the process. This section reviews the most common signalling system (SS7) in use (especially in the Public Network).

Voice Communication Systems
At the heart of a company voice communications system has been, and often still is, the PABX. This section looks at some of the processes involved with PABX operation, including numbering, key systems, least cost routing, ACD, CTI, automated attendants (IVR) and Centrex.

Further Developments
The voice telephony industry didn’t stand still and this section looks at some of the concepts that have been introduced over the years. This includes ISDN, ATM, intelligent networking, xDSL access (broadband) and Voice over IP.