What Are Communication Systems and Equipment?

During the stone ages man used sounds for communication imitating the animals and the birds. He learned to express himself through sounds. This later developed into words, sentences and phrases and later the written language came into existence. Why do we need to communicate? Communication is used to express one's thoughts and views to another human being basically. Nowadays communication is used to transfer data or messages to even robots and automated machines. For this purpose communication systems and equipment are used. What are communication systems and equipment? It is a group of equipment used for a specific job say like to transfer data or a message to another source of communication. It is used to send and receive messages and hence appropriate equipment or handheld receivers are used for this purpose.

A communication system consists of various equipments like handsets, data receivers, transmitters and transceivers. Most important equipment for communication is the handset which converts the electrical energy into acoustical energy to receive and send signals. It is a data transmitting device and is usually connected with the control unit. The radio control unit transmits the received and sent signals. If the radio uses HF satellite signals then this control unit functions like a mediator to transmit data via the satellite. It is the most imperative equipment for a communication system. Its capacity and power to transmit is what makes the system effective and powerful. Thus the main equipment of a communication system consist of handset, a control unit and radio switch board.

Radio communication is replaced by satellite communication nowadays. From the time the first satellite Sputnik was set in orbit until now many satellites are being placed to help mainly for communication purposes. However the military services were the pioneers in using this satellite driven communication first. They are very reliable, fast, secure, dependable and cost effective. Generally this form of communication involves active satellite and several base station or terminals based on the earth. The terminal to sends the data through the Up Link frequency and receives the amplified down link frequency from the earth through the receiving terminal. Handheld devices or transmitters are used to send and receive such HF radio signals.