Modems
|
|
The modem gives your P.C the ability to communicate with other computers over phone lines.
|
|
Modems can be external or internal. Internal modems sit in a slot on the motherboard, external modems are connected to the motherboard via a cable, that plugs into a serial port in the back of your computer
|
|
|
|
|
|
|
|
|
A modem uses the traditional telephone system which is an analogue system of copper wires, designed to transmit the human voice. A modem is the bridge between the digital signals of your computer and the analogue signals of the telephone network.
|
The modem in your computer modulates on and off binary digital data into an analogue wave signal that is then sent down the telephone network; on
|
the receiving end of the phone connection, a modem does just the opposite, it demodulates the analogue signals back into digital code, so that the receiving computer can understand the data you computer has sent.
|
The two terms MODulate and DEModulate give the MODEM its name.
|
|
There are new modems that work with digital signals, these being cable modems, which connect to a P.C or Internet using the same pathways as cable televisions; digital subscriber line (DSL) and ISDN (integrated services digital network) modems.
|
|
The use of modems is explored in World Wide Web
|
