All frame formats begin with at least two SYN bytes. The binary form of the SYN byte has the property that no rotation of the byte is equal to the original. This allows the receiver to find the beginning of a frame by searching the received bit stream for the SYN pattern. When this is found, tentative byte synchronization has been achieved. If the next character is also a SYN, character synchronization has been achieved.
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What is Bisync? A Short History Lesson Bisync is an acronym shortened from "binary synchronous". Bisync is one of the names commonly used when referring to a synchronous communications protocol introduced by IBM back in with the introduction of a product called the X Transmission Control Unit. The full name of the protocol is the "Binary Synchronous Communication" protocol.
This is usually abbreviated to "BSC". Whenever you see the terms "bisync" and "BSC" in conjunction with communications protocols, they are referring to the same thing. Furthermore, over the years, other terms have come into use and are often used interchangeably with bisync and BSC. While technically these terms may be inaccurate, they do have a practical basis and convey meaning.
These terminals used punch cards and consisted of a card reader, a card punch, and a line printer. These terminals used the bisync protocol to transmit and receive data with an IBM mainframe computer.
The terminal was a later model and used a more robust version of the bisync protocol -- hence the terms " bisync" vs.
Virtually all bisync in use today conforms with the version. The reason amounts to something of a computing history lesson.
Much like Zmodem and FTP today, if you needed to get a file from one machine to another during that time, very often the bisync protocol was used. The bisync protocol ended up in ATM machines, check sorting machines, radar systems, cash registers, and countless other devices. This massive array of hardware does not disappear overnight.
There is still a huge installed base of bisync-equipped machinery in North America and to a lesser extent in the rest of the world. If somehow all of the bisync interconnected machines in the world were to stop all at once, the results would be catastrophic. Many banks would cease to function.
Some air traffic control systems would collapse. Many of the point-of-sale systems in retail stores would fail. Many credit and debit cards would become useless.
Bisync is dying away, Slowly. This lead directly to the IBM x terminal which was a successor to the -- a diskette drive was added and bisync was replaced with a new protocol compatible with SNA. This abandonment, however, did not erase the bisync protocol nor its huge installed base. But it did open the door for specialty companies, like Serengeti Systems, to expand into this niche market. To some, it is remarkable that anything computer related first used nearly fourty years ago, could still be in use today.
New equipment relying solely on bisync connectivity probably has not been manufactured in more than a decade. Like the buggy whip, one day bisync will pass into history. But, we can assure you that no one at Serengeti Systems is holding their breath just yet Bisync questions?
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Binary Synchronous Communications
What is the Bisync Protocol? Bisync is an abbreviation shortened from "binary synchronous". Sometimes you may also see the acronym BSC. Bisync is a block-oriented, error-correcting, synchronous data communications protocol introduced by IBM back in with the introduction of a product called the X Transmission Control Unit. Furthermore, over the years, other terms have come into use and are often used interchangeably with bisync and BSC. While technically these terms may be inaccurate, they do have a practical basis and convey meaning.
BISYNC PROTOCOL PDF
Yozshukree Learn more about citation styles Citation styles Encyclopedia. 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. These are ignored by the receiver. Contribute to this site Electronic licensing info. From Wikipedia, the free encyclopedia. If somehow all of the bisync interconnected machines in the world were to stop all at once, the results would portocol catastrophic. All rights reserved under Pan American and International copyright conventions.