Long-Distance Communication Carriers, Modulation, and Modems IST 220 Week 3 - PowerPoint PPT Presentation


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Long-distance communicationEncoding used by RS-232 cannot work in all situations Over long distances Using existing systems like telephone Different encoding strategies needed . Sending signals long distancesElectric current becomes weaker as it travels on wire Resulting signal loss may prevent accurate decoding of data Signal loss prevents use of RS-232 over long distances .

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