1. MODEM B Y K H U S H

2. With the evolution of technology, world has contracted in to a small village. One single click on your computer can connect you to any part of the globe. All of this has been possible due to a small electronic device called Modem. In this Power Point presentation we will discuss about modem, its types and history And other things.

3. ALL ABOUT MODEM A Modem is an electronic device that converts computer's digital information into analog carrier signals and vice versa. Computers use modems to communicate with each other over a network. The word modem is derived from "modulator-demodulator" that defines the functions it performs. Modems are computer hardware typically used to transmit digital data over a phone line. The working of modems can be easily understood from this. Modems always work in pair. The sending modem converts computer’s digital information into specific frequencies compatible with the phone line, the process is called modulation. The receiving modem decodes the signal back into the digital information, the process is known as demodulation. In wireless modems, digital data is converted into radio signals and vice versa.

4. MODEM A modem contains a DAC and an ADC. The DAC in the modem is required so that the digital computer can send data down the analogue telephone line (it converts digital data into noises which is exactly what the telephone line is designed to carry.) The ADC in the modem is required so that the analogue signals (noises) that arrive via the telephone line can be converted back into digital data.