Modem stands for modular – demodulator. It is a mechanism that adjusts an analog carrier signal to program digital information as well as to extract the carrier signal to decipher the information that was transmitted. The aim is to generate a signal that can easily transmit, decode and replicate the original digital data. Modems can be used over any means of transmitting analog signals from driven diodes to radio. The most recognizable instance is a voice band modem that turns the digital 1s and 0s of a personal computer into sounds that can be transmitted over the telephone lines of plain old telephone services (POTS). Once the sound is received on the other side the 1s and 0s will be transformed into a form that is used by a Serial, USB, Ethernet or network connection.
The amount of data that can be sent in a given time is what generally classifies modems. The data is usually measured in bits per second (bps). The number of times the modem alters its signal state per second is a classification...


















