Modem

Modem comes from the abbreviation MO dulator DEM odulator. Modulator is part of the signal information into the carrier signal (Carrier) and is ready to be sent, while the Demodulator is a separate information signal (which contains the data or message) of the carrier signal (carrier) so that information received can be well received. Modem is a merging both, that means the modem is a two-way communication tool. Each communication device remote two-way general use which is called the "modem", such as VSAT, Microwave Radio, and others, but generally the term modem is known as the Hardware is often used for communication on the computer.

Data from the computer in the digital signal to the modem to be converted to analog signals. Analog signals can be transmitted through several media such as telecommunication telephone and radio.

Arriving at the destination modem, the analog signal is converted into digital signal and sent back to the computer. There are two types of modems are physical, that is an external modem and internal modem.