Introduction In describing Cellular Radio, ISDN (Integrated Services Digital Network) and Satellite Communications we must first have a general understanding of the meaning of these forms of Telecommunications. After a brief explanation of the different forms, they will be described in more detail. Then the present 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 Radio? Cellular Radio is the …showed first 75 words of 1696 total…

…showed last 75 words of 1696 total…They would orbit around the geographic pole and revolve around the earth in a few hours. They form a ring around the Earth making it possible to transmit signals from one point on earth to another, by means of a mobile phone. The advantages of using satellite communications are as follows: a. Communications to large regions quickly. b. Cheaper than laying large amounts of cable, over mountains and under oceans. c. Communication satellites are reliable.