Theory- 38 :- Types of Computer Modems
What is Modem The full form of modem is “modulator/demodulator” . It is a hardware component that allows computers or other devices to be connected to computers or other devices over the Internet. It converts or “ modulates ” the analog signal from the phone or cable into a digital signal that can be easily recognized by a computer. Similarly, it converts digital data into analog signals on computers or other devices. In 1962, the first commercial modem was made and sold by AT&T with the Bell 103. Previous modems used to be “dial-up”, meaning they had to dial a telephone number to connect to the ISP. This modem operates in standard analog telephone lines and also uses the same frequency as telephone calls, limiting its data transfer rate to a maximum of 56 kbps. Dial-up modems also require total bandwidth from local telephone lines, which means voice calls can interfere with your Internet connection. At the same time, modern modems are usually DSL and cable modems, also...
