Poll message

Poll message

In a "multidrop" line arrangement (a central computer and different terminals in which the terminals share one line to and from the computer), the system uses a master/slave polling arrangement whereby the central computer sends message(called "polling message") to a specific terminal on the outgoing line. All terminals listen to the outgoing line, but only the terminal that is polled replies by sending any information that it has ready for transmission on the incoming line.


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