MODEM

Modem stands for Modulator demodulator. Modulator is part of changing the information signal into the carrier signal (Carrier) and is ready to be sent, while the demodulator is the part that separates the information signal (which contain data or messages) of the carrier signal (carrier) that accepted that the information can be received well. Modem is a merger of both, it means the modem is a two-way communication tool. Each remote communications device of two-way commonly use the so-called "modern", such as VSAT, microwave radio, etc., but generally the more modern term known as the hardware is often used for communications on the computer.

Data from the computer in the form of digital signal provided to a modem to convert into analog signals. Analog signals can be transmitted through several media such as mobile telecommunications and radio.

On arrival at the destination modem, the analog signal is converted into digital signals and transmitted back to the computer. There are two types of modems are physical,  external modem and internal modem.

• ADSL MODEM

ADSL modem (Asymetric Digital Subscribe Line) technology that allows surfing the Internet and use the analog phone simultaneously. ADSL is given a device called a Splitter or divider line.

Splitter position when placed in front of the line calls. This means you can not graft the ADSL modem line with direct sound. Splitter useful tool to eliminate noise when you are using ADSL modem. With Splitter both can go together, where you may be able to answer and call someone with a regular phone. On the other hand you can still connect to the Internet via ADSL modem.

• CABEL MODEM