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IT Interview Questions:Synchronous transmission signals
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IT Interview Questions:Synchronous transmission signals
occur at the same clock rate and all clocks are based on a single reference clock. Since asynchronous transmission is a character-by-character transmission type, each character is delimited by a start and stop bit, therefore clocks are not needed in this type of transmission. Synchronous communication requires a response at the end of each exchange of frames, while asynchronous communications do not require responses. Support for the Synchronous Serial interface is supplied on the Multiport Communications Interface (CSC-MCI) and the Serial Port Communications Interface (CSC-SCI) network interface cards. The Asynchronous Serial interface is provided by a number of methods, including RJ-11, RJ-45, and 50-pin Telco connectors. Some ports can function both as Synchronous Serial interfaces and Asynchronous Serial interfaces. Such ports are called Async/Sync ports. The Async/Sync ports support Telco and RJ-11 connectors.
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