Asynchronous-to-synchronous data concentration system

Details Asynchronous-to-synchronous data concentration system Asynchronous-to-synchronous data concentration system

H - Electricity

04

L

354/104, 354/235

H04L 5/24 (2006.01)

Patent

CA 1129556

ASYNCHRONOUS-TO-SYNCHRONOUS DATA CONCENTRATION SYSTEM Abstract of the Disclosure Asynchronous character-oriented (start-stop) data are transmitted through a synchronous transmission channel at a rate which can exceed the synchronous rate. The excess data rate is accomplished in an input buffer at the transmitter by suppressing occasional stop bits in proportion to the difference between synchronous and asynchronous rates. An output buffer at the receiver detects start bits and thereafter monitors the presence or absence of stop bits. When a stop bit is absent, the output buffer restores it before delivering the character to the data user. Special control signals not organized into charac- ters, such as all-space signals, are also monitored at both transmitter and receiver to insure that stop bits are not spuriously inserted.

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