A uniform discipline, using a defined set of control characters and control character sequences, for synchronized transmission of binary coded data between stations in a data communications system. Also called BISYNC.

Rules developed by IBM for the synchronous transmission of binary coded data as a serial stream of binary digits. Synchronization is achieved by using control characters recognizable as bit patterns which do not appear within the body of the message.

a byte-oriented, blocked, error-correcting data communications protocol invented by IBM in the 1960s prior to the introduction of SNA

A character-oriented synchronous link protocol.

A data communications line protocol that uses a standard set of transmission control characters and control character sequences to send binary-coded data over a communications line.

Binary Synchronous Communication (BSC or Bisync) is an IBM link protocol, announced in 1967 after the introduction of System/360. It replaced the synchronous-transmit-receive (STR) protocol used with second generation computers. The intent was that common link management rules could be used with three different alphabets for encoding messages.