(From Ganeca’s book)
If you want to connected with your friend by telephone, absolutely you need to have an appliance which is able to connect your telephone and your friend telephone. also if you want to see telecast of America or Europe, you need an appliance to catch the broadcast. That able to connect a communication means to refers other communication means of.that is called network. There are some kinds of used networks in the field of telecommunications, that is as follows.
a. Wireless is usually conceived by communications network of nir cable ( without cable), a communications network which is using radiowave / functioning selected frequency as transmitter, lasing and receiver of containing wave of data. wireless is often used by computer to other communicating computer
b. Modem is an abbreviation of modulator of demodulator. This Modem used to transfer data of computer from data form become data in the form of electromagnetic. There are various type of modem circulating in the market with a various speed of immeasurable transfer, that is as follows 14400 bps, 28800 bps, 56000 bps, 128000 bps, 4 Mbps, and 10 of Mbps
selection of this [is] modem very hinge with requirement of you. For the reason, choose the modem with speed of high transfer, for example 10 Mbps mean in one second can transfer up to 10 mega- character
c. Satellite are communications network that used to as transmitter, receiver, and lasing waving. this Communications system use electromagnetic wave as consignor of his data. Usually satellite placed in galaxy. almost entire telecommunications use satellite as the core important network
d. Wireline is a network which looks like wireless. The difference, wireless is network without cable, while wireline is network using cable. Possible of you have telephone at home which produced by PT. Telkom. That one of the example [of] usage of wireline.Telephone using cable ( wireline), can is also used to access internet, that is by connecting cable phone in computer port. However, there [is] also using network of wireless network or without cable, like Telkom Flexi.
