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A line protocol created by IBM for synchronized communication between mainframe computers and remote job-entry terminals. BISYNC is a character-oriented protocol: it uses special control characters to mark the beginning and end of a message , to acknowledge previous messages, to request retransmission of missing or damaged messages, etc.

The protocol is inherently half duplex: a message is sent, a reply is sent, the next message is sent, etc. Full duplex communication lines and modems may be used but most of the additional capacity is wasted. BISYNC's retransmission and acknowledgment scheme does not work efficiently over connections with long delay times.

This is particularly important in the US and other areas where the telephone system is converting to satellite transmission systems for voice and data traffic. May 24, Retrieved May 24, from Encyclopedia. Then, copy and paste the text into your bibliography or works cited list. Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, Encyclopedia. Cite this article Pick a style below, and copy the text for your bibliography.

Learn more about citation styles Citation styles Encyclopedia. More From encyclopedia. A data link control protocol developed by Digital Equipment Corporation. Updated About encyclopedia. Analog and Digital. Line of Communications. Human Information Processing. Paradigm and Communication. Biswas, Anil. Bisutun Inscription. Bisutti, Danielle. Bistro and Wine Bar. Bistrita, Abbey of. Bisterfeld, Johann Heinrich. Bist du bei mir.

Bissoondath, Neil Neil Devindra Bissoondath. Bissoondath, Neil Devindra Bissoondath, Neil. Bissonnette, Hon. Bissonnet, Hon. Michel, LL. Bisson, Terry Bisson, Juliette Madame Alexandre Bisson. Bitahon "Security," in Hebrew. Bitan Aharon. Bitburg Controversy. Bite Analysis. Bitetti Ravina , Ernesto Guillermo.



Get info about the Encyclopedia of Networking and Telecommunicatons , 3rd edition Download the electronic version of the Encyclopedia of Networking, 2nd edition It's free! Note: Many topics at this site are reduced versions of the text in "The Encyclopedia of Networking and Telecommunications. Each message must be acknowledged, adding to its overhead. BISYNC is character oriented, meaning that groups of bits bytes are the main elements of transmission, rather than a stream of bits.


Difference between BISYNC and HDLC features

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 character encodings for messages. At one time Bisync was the most widely used communications protocol [1] and is still in limited use in Bisync differs from protocols that succeeded it in the complexity of message framing. Later protocols use a single framing scheme for all messages sent by the protocol. Bisync has five different framing formats.


Binary Synchronous Communications

HDLC high level data link communication is a serial protocol using data clocks operating at one clock cycle per bit synchronous protocol. Transparency Data patterns are differentiated from special patterns, such as flags, using a hardware function called zero bit stuffing and removal. When not sending data, a hardware generated idle pattern is present on the data signal. This pattern is configurable and is usually all ones, or repeated flags. Hardware generates an opening flag before sending data. Hardware appends an optional CRC value and a closing flag to a frame of data.

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