There was a time when the only way for people to keep contact with their relatives, friends and neighbors was writing letters. People used to avail the postal service to know about their loved ones. But since the invention of telephone, communication has become much more easy and simple and thanks to the rapid progress of science and technology, calling all over the world is not a problem at all nowadays. Now you can talk with your friend or parents in India from United States of India simply by pressing the buttons on your telephone receiver.
Speaking about calling all over the world we need to mention about telecommunication technology which has played the pivotal role in making things so easy for people all over the world. The way telecommunication technology is improving there will be nothing to get surprise if calling outside the world becomes possible in the near future. The use of advanced technology and softwares have made making calling all over the world so easy in the recent times that people sometimes forget that they are miles away from their friends, relatives, parents and neighbors.
When telecommunication technology was invented people could only make local calls and the telephone operators used to make the connection between two persons by inserting the jacks in particular point. Gradually the technology named 'trunk call' came and facilitated people in making long distance calls. But as the technology was not so advanced, people used to face problem in talking. The lines used to get disconnected repeatedly and it used to take a long time to connect two lines. But in the recent past making long distance calls has become very easy with the STD system. Technically the STD system is so sound that the trend of making trunk calls just got vanished
Next came the ISD system and people started availing the service for calling all over the world. However it has to be mentioned that when STD and ISD services were launched all over the world the calls were very much cost effective but with the continuous advancement of science and technology calling all over the world calling all over the world has become quite economical. For its cost effectiveness earlier people didn't use to avail the ISD and STD facility in their personal homes and used to make calls from the public telephone booths but nowadays most of the people are using these services in their homes for calling all over the world.
And now we have got mobile phones. With using the cellular technology we are now calling all over the world while moving. The days of talking with people sitting in front of the telephone receiver is gone. Advanced technology has made it possible for you to to call from United Arab Emirates to Nairobi within seconds. There is no need to request the telephone operator for 'kindly' connecting you with a person living miles and miles away from you. Just press the keys on your mobile dial his number and wait, he will receive your call within seconds.
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