Cellular Radio, Isdn Networks And Satellite Communications :: essays research papers

IntroductionIn describing cellular radiocommunication, ISDN (Integrated Services Digital Network) and Satellite Communications we must first collect a general understanding of the meaning of these forms of Telecommunications. After a skeleton explanation of the different forms, they will be described in much detail. Then the pre direct and future roles in Irish Telecommunications will be looked at and some examples given. This will then lead to the conclusion.1. What is Cellular wireless?Cellular Radio is the expend of Technology using low provide radio transmission for transmission and receiving voice or data to a telephone network. Users good deal be stationary or mobile. It means users ar no longer constrained to place to place as it is a wireless arrangement.2. What is ISDN (Integrated Services Digital Network)?ISDN is a constitution which provides digital power i.e. voice, video and data transmission in digital form, to be sent and received by a customer. Unlike st and alone service such as telephone, telex, fax and data communications, ISDN is a network which can offer all these services as a package in which a user can talk, exchange data, faxes and other documents at the alike time, instead of having to use different networks for these services.3. What is Satellite Communications?This is the use of orbiting satellites to pass microwave transmissions from earth stations to the satellite an to re-transmit those manifestations derriere down to some other earth station by means of microwave transmission.Cellular RadioAt present there are two types of cellular radio systems in operation in Ireland. These are1. TACSThis system is an analogue system in which the voice is transmitted by radio from the telephone to the adjacent base station in analogue form. Analogue systems are at present throughout the world but each Country would fill different standards. So a user can not use the phone in a different country, also as the signal it transm its is in analogue form the calls can be monitored quite easily with the help of a scanner. Americas version of analogue cellular radio is called AMPS (Advanced Mobile Phone System).2. GSM (Global System for Mobiles)GSM is a more late technical standard for cellular mobile phone systems, which was developed in Europe. It is a digital system, which voice and other sounds or data are converted to digital form before they are transmitted amidst the base station and the mobile phone and then converted back to analogue form.There are major advantages in using the GSM system as opposed to the TACS system