< protocol > (Bisynch) An IBM link protocol , developed in the 1960 and popular in the 1970s and 1980s.
Binary Synchronous Transmission has been largely replaced in IBM environments with SDLC . Bisync was developed for batch communications between a System 360 computer and the IBM 2780 and 3780 Remote Job Entry (RJE) terminals . It supports RJE and on-line terminals in the CICS / VSE environment. It operates with EBCDIC or ASCII character sets . It requires that every message be acknowledged ( ACK ) or negatively acknowledged ( NACK ) so it has high transmission overhead. It is typically character oriented and half-duplex , although some of the bisync protocol flavours or dialects support binary transmission and full-duplex operation.
(1997-01-07)