Modem is abbreviation for Modulation & Demodulation. Modem is used to convert usually digital to analog & vice verca. It is used for internet connection through phone lines.
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The purpose of the modem is to modulate and demodulate the electonic analog pulses of the computer to pulses the phone system can handle.
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Modem - Wikipedia, the free encyclopedia
A modem ( mo dulator- 'dem 'odulator ) is a device that modulates an analog carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted ...
en.wikipedia.org/wiki/Modem
The purpose of this tutorial is to give you an introduction to Cable Modems. This tutorial should be useful to ... ; What is the purpose of a modem? ; What is a Cable Modem?; How Fast is a Cable Modem? ; How Does it Connect?; How do Cable Modems Work?; Cable Modem FAQ?; How do cable modems achieve multiple mgbps;
www.math.hmc.edu/~jiang/modems/modems.html www.math.hmc.edu/~jiang/modems/modems.html
An example is a PSK modem in which four different phase changes (0, 90, 180, 270 degrees) are employed instead of just two. This enables each phase change to convey two bits. Higer bit rates are achieved using 8 and 16 phase changes.
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The purpose of a modem is to send the converted digital signals of a computer to analog signals to send and then convert the analog signals it receives to digital to send the message back to the computer.
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LDM30-P $103.00 General purpose limited distance modem, 25 pin male RS-232 connector, screw termination field connector, host-powered ... Keywords.:General Purpose Limited Distance Modem;
www.omega.com/ppt/pptsc.asp?ref=LDM-30
General Purpose Limited Distance Modem; DC to 57,600 Baud; Optical Isolation; Surge Protectors; LED Diagnostic; Indicators; Operation to 3 Miles; (5 KM) at 9600 Baud, 1 Mile (1.7 KM) at 19,200, 0.5 Miles (0.8 KM) at;
www.omega.com/DAS/pdf/LDM-30.pdf
Integrated modem which employs a host processor as its controller ; Issued on: 12/08/1992 ; Inventor: Pindar, et al. ... Multi-mode home terminal system that utilizes a single embedded general purpose/DSP processor and a single random access memory ; Issued on: 10/05/1993 ; Inventor: Valentaten, et al.
www.patentstorm.us/patents/6185628.html
In this article we take a detailed look at computer modems. We first look at the definition of the modem, what the word “modem” stands for, and what its main purpose is. Then we carry on by looking at the parts of a modem in a conceptual way. ... What is a Modem? What is its Purpose? What are its Parts?
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