COMM3510 Written Work
Wordcount: 750 words
Telecommunicationrefers to the transmission of information in the form of words,sounds, or images by use of telegraphs, telephone radio or televisionnormally over a long distance between two points in the form ofelectromagnetic signals. It occurs when the exchange of theinformation in varied forms such as sound or image between two ormore places includes the use of technology. It is being referred toas telecommunications because it involves many different technologiessuch as electrical signals (uses channels to transmit information),signal cables (it involves transmission over the physical medium) andin electromagnetic waves that do not require a medium fortransmission (Hafner, 1998).
Channelcommunication refers to physical transmission mediums like wires or alogical connection over a medium like radio channels where the senderis one and many receivers all over. Normally in this communicationthere is a sender and the receiver. The channel is like a path forconveying of the signal. Communication channels are like pathway usedby the information and it uses two type of media like cables andbroadcast. Channel can be modeled manually by trying to calculate thephysical process that modifies the transmitted signals. Channel modelcan either be digital quantified like binary) or analog (Shannon,1948).
Signalcables are the shielded cable, which are the electrical cable coveredby a common conductor layer. The shield helps in the reduction ofelectrical noise distressing the signals and also to lessenelectromagnetic emission that may interfere with the other device.The shield also minimizes the capacitive coupled noise as a result ofother electrical sources and also acts as the return path signal orscreening. The application part of these cables is in the securitysystem where it offers defense from power frequency as well as radiofrequency obstruction thus dropping the number of false alarmgenerated. They are also applicable in keeping of the data or signalcable away from interference by heavy power circuit through whichthey pass (ITU, 2003).
Telecommunicationsis composed of a primary unit that consists of the transmitter,transmission medium, and the receiver. The sender takes theinformation and converts it to a signal and sends the signal throughthe transmission medium that, in this case, serve to carry thesignal. The receiver can be or multiple and it takes the signal fromthe channel and change it back into usable information. This primaryunit, therefore, the telecommunication system and sometimes thetelecommunication can be the two-way system where a single componentserves as both the transmitter and receiver, for instance, the caseof the cellular telephone (Okonite Engineering Technical Center,2015).
Informationtransfer between the sender or transmitter and the receiver involvesthe receiver’s antenna as the interface between the free spacechannel and the receiver. Point to point communication is where thereare only one transmitter and one receiver but in broadcastcommunication is where there is a powerful one transmitter that sendssignals to many low powers but sensitive receivers. The communicationbetween many transmitters with many receivers is known as a multiplexsystem (Stallings, 2004).
Acommunication network is the collection of the transmitter, receiverand communication channel that get involved in the transmission ofthe message. Digital communication network contains one or morerouter that works together transmitting the information to theintended user. Analog communication network, on the other hand,consists of one or more switches that establish the connectionbetween the two users. Repeaters are present in all the two system sothat the signals can be amplified as they are being transmitted overlong distance or even recreate the signal so that the signal can beclear and thus be able to render the signal different from the noise.The output of the digital communication network is easier to bestored in the memory (Haykin, 2001).
Modulation,as used in the telecommunication, refers to the shaping of the signalto convey information. It is also called keying, and it helps totransmit the information of low-frequency analog signal at higherfrequencies. Telecommunication has a great impact on the society. Ithelps to build global business empires. It plays an important role insocial relations among people as they communicate through differentways like through picture. It has also led to the advancement of themedia sector to facilitate the exchange of information. Radios,telephone, television, telegraph, INTERNET, and computer employ theuse of telecommunication for the exchanges of information.
Hafner,K. (1998). Wherewizards stay up late: The origins of the internet.U.S.A: Simon & Schuster.
Haykin,S. (2001). Communication Systems (4th ed.). New York: John Wiley &Sons. .
ITU(International Telecommunication Union) (2003). WorldTelecommunication Development Report 2003. Retrieved fromhttp://www.itu.int/net/wsis/tunis/newsroom/stats/WorldTelecomDevelopmentReport-2003_E.pdf
OkoniteEngineering Technical Center. (2015) .Shielding.Retrieved from http://okonite.com/engineering/shielding.html
Stallings,W. (2004). Data and Computer Communications (7th edition (intl) ed.).New York: Pearson Prentice Hall.
Shannon,C. E. (1948). A mathematical theory of communication. TheBell System Technical Journal, 27,379–423 and 623–656.