The computer network works in digital mode, while analog technology is used for carrying massages across phone lines. What is a modem modem is abbreviation for modulator demodulator. Xmodem refers to the file transfer etiquette introduced by ward christensens 1977 modem. Pdf is listed in the worlds largest and most authoritative dictionary database of abbreviations and acronyms the free dictionary. Whats the difference between epon and gpon optical fiber. Pdf is also an abbreviation for the netware printer definition file. For example, a cable modem and dsl modem are two examples of these.
The term modem definition is an acronym for modulatordemodulator. A modem a portmanteau of modulatordemodulator is a hardware device that converts. The internal modem shown at the beginning of this document is an example of a pci modem. Modems are referred to as an asynchronous device, meaning that. We marvel at how our computer lets us video chat from our bedroom with a friend. Looking for online definition of pdf or what pdf stands for. Whats the difference between epon and gpon optical fiber networks. The primary modem function is to convert digital data into an analog form which is suitable for transmission on common carrier circuits example telephone lines. The backbone of the world wide web is made of html files, which. For example, a modem may covert the digital data of a computer into an analog signal that can be read and carried by a telephone line. Pdf factors affecting the internet modem purchase decision of. The modulator part of the modem converts digital signals to analog signals.
Basically, a modem is used for transmitting and receiving data over a communication channel, such as twistedpair telephone lines, coaxial cables, and optical fibers. Modems accomplish both of these tasks simultaneously and, for this reason, the term modem is a combination of modulate and demodulate. A modem is a conversion device that converts signals from one device into signals another device can read. A modem is a communication device that converts binary signal into analog acoustic. Currently the purpose of a modem is to convert a computers data stream to analog format so that it can be transmitted over the analog telephone line. A modem portmanteau of modulatordemodulator is a hardware device that converts data into a format suitable for a transmission medium so that it can be transmitted from computer to computer historically over telephone wires. Similarly, it converts digital data from a computer or other device into an analog signal that can be sent over standard telephone lines. Modem definition, an electronic device that makes possible the transmission of data to or from a computer via telephone or other communication lines. The earliest radio transmitters used a form of analog modulation called amplitude modulation. Internal modem modem that connects to a pci slot inside a newer desktop computer or isa slot on an older computer. A modem modulatordemodulator is a device or program that enables a computer to transmit data over, for example, telephone or cable lines.
We have all wondered how it is possible to send an email from one computer to another in seconds. Modems are used for data transfer from one computer network to another computer network through telephone lines. Modem iiia2 messages for d7212, d7412, d9112, d9124, and d9412 modem iiia 2 messages for d7212, d7412, d9112, d9124, and d9412 panels signal internalexternal. Functions and types of modems free download as word doc.
Pdf on apr 17, 2015, md akram hossain and others published factors affecting the internet modem. External modem modem within a box that connects to the computer externally, usually the serial ports or usb port. A modem is a hardware networking device that converts data to a signal so it can be easily sent and received over a phone line, cable, or satellite connection. A modem is a network device that both modulates and demodulates analog carrier signals called sine waves for encoding and decoding digital information for processing. Modem definition block diagram function applications.
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