STUDY OF THE TELECOMMUNICATION SYSTEM IN SRI LANKA

Abstract

Telecommunication is a very important phenomenological technology. Since we are living in an era of communication explosion. Which is aimed at making this world closer. Sri Lanka telecom has a reputed history as the national telecommunication service provider in the country. Local telecommunication technology and International telecommunication are major fragments of the Sri Lanka. Telephone that consists transmitter circuit, receiver circuit and local exchanges are the major components of local telecommunication system. The transmitter circuit couples the input massage signal to the channel. While it may some times be possible to couple the input transducer directly to the channel, it is often necessary to process and modify the input signal for efficient transmission over the channel. Signal processing operations performed by the transmitter include amplification, filtering and modulation process and the main function of the receiver is to extract the input message signal from the degraded version of the transmitted signal coming from the channel. The receiver performs this function through the process of demodulation, the reverse of the transmitter’s modulation process. Switching technology method can be used to distribute local and international voice signal in exchange equipment, voice signals can propagate Using radio micro waves, pulse code modulation method and multiplex technology method. The fundamental components of international telecommunication system arc telephone, exchanges, ISC (International Switching Center), ITMC (International Transmission Maintenance Center). As well as there are two types of transmission techniques methods to propagate the international voice signals. They are satellite technology method and fiber optic cable technology method which the signal propagate as a light waves. Using these transmission technologies Sri Lanka is able to propagate international voice signals. Therefore every type of voice signals can propagate more efficiency using above methods.