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Topic: Binary Synchronous Transmission


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In the News (Mon 6 Jul 09)

  
  Binary Synchronous Transmission - Biocrawler   (Site not responding. Last check: 2007-10-16)
Binary Synchronous Transmission (Bisync) is 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.
It is typically character oriented and half-duplex, although some of the bisync protocol flavours or dialects support binary transmission and full-duplex operation.
www.biocrawler.com /encyclopedia/Binary_Synchronous_Transmission   (151 words)

  
 Synchronous Serial Communication Overview by Quatech
The theory behind asynchronous and synchronous communication is essentially the same: Point B needs to know when a transmission from Point A begins, when it ends, and if it was processed correctly.
With synchronous communication, you would establish with your listener that you were speaking English, that you will be speaking words at measured intervals, and that you would utter a complete sentence, or paragraph, or extended soliloquy, before pausing to confirm understanding.
Synchronous communication can be implemented for full and half-duplex networks using bit- or byte-oriented protocols.
www.quatech.com /support/comm-over-syncserial.php   (1938 words)

  
  Synchronous Communications Adapter   (Site not responding. Last check: 2007-10-16)
Synchronous transmit-receive or binary synchronous operation with a two-wire half-duplex transmission system requires a delay of approximately 200 milliseconds when the adapter switches from receiving to transmitting data.
The 1.25-second timer is used in the synchronize mode to signal the end of the transmission of idle characters for synchronization in the STR mode.
In binary synchronous operation the receiving terminal's ability to interpret the data it receives is the prime consideration in selecting the code to use for communication.
www.ibm1130.net /functional/SCA.html   (8416 words)

  
  3780   (Site not responding. Last check: 2007-10-16)
Binary Synchronous Transmission (Bisynch) is 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.
It is typically character oriented and half-duplex, although some of the bisync protocol flavours or dialects support binary transmission and full-duplex operation.
www.yourencyclopedia.net /3780.html   (171 words)

  
 VT100.net: Terminals & Printers Handbook Glossary
The replies (DLE sequences in binary synchronous communications) indicate that the previous transmission block was accepted by the receiver and that it is ready to accept the next block of the transmission.
In binary synchronous (BSC) transmission, ENQ is transmitted as part of an initialization sequence (line bit) in point-to-point operation, and as the final character of a selection or polling sequence in multipoint operation.
In binary synchronous communications, this DLE sequence is sent by a receiving station to indicate that it is temporarily not ready to receive data.
www.vt100.net /docs/tp83/glossary.html   (6144 words)

  
 Part12: Binary Synchronous Protocol   (Site not responding. Last check: 2007-10-16)
Synchronous protocols involve sending timing information along with the data bytes, so that the receiver can remain in synchronization with the sender.
Synchronize character, it establishes and maintains character synchronization prior to a message block and during transmission.
Binary synchronous is a well established protocol and has been around for a number of years.
goforit.unk.edu /datacomm/dc_012.htm   (1003 words)

  
 Part5: Asynchronous and Synchronous   (Site not responding. Last check: 2007-10-16)
In synchronous transmission, greater efficiency is achieved by grouping characters together, and doing away with the start and stop bits for each character.
In this way, synchronous transmission overcomes the two main deficiencies of the asynchronous method, that of inefficiency and lack of error detection.
In binary synchronous, the line idle state is changed to a known character sequence (7E), which is used to synchronize the receiver to the sender.
kmh.yeungnam-c.ac.kr /Os/dataCom/dc_005.htm   (595 words)

  
 Sangoma - Sync & Async Tutorial   (Site not responding. Last check: 2007-10-16)
If the sender and receiver were both supplied by exactly the same clock source, then transmission could take place forever with the assurance that signal sampling at the receiver was always in perfect synchronization with the transmitter.
The start of transmission of a character is signaled by a drop in signal level to the space level.
In synchronous communications, data is not sent in individual bytes, but as frames of large data blocks.
www.sangoma.com /sync&a.htm   (853 words)

  
 Method of synchronizing radio transmitters for synchronous radio transmission - Patent 4709402
The synchronization takes place in each particular radio transmitter, and it is carried out progressively, so that it begins in the transmitters closest to the central station and is spread like a wave to station farther and farther away from the central station, a common time signal transmitter being superfluous.
The frequency of the signal at B is to be used for synchronizing the station radio transmitter to the same frequency as that of the received signal or to a frequency deviating therefrom by a selected amount.
Synchronization to the right transmission frequency is carried out immediately after a setting for synchronousness in the transmission.
www.freepatentsonline.com /4709402.html   (2989 words)

  
 Binary Synchronous Transmission - Wikipedia, the free encyclopedia
Binary Synchronous Transmission (Bisync) is an IBM link protocol, developed in the 1960 and popular in the 1970s and 1980s.
The beginning of a frame is signalled by spacial character SYN (synchronization).
The body of the frame is wrapped between two special sentinel characters: STX (start of text) and ETX (End of text).
en.wikipedia.org /wiki/Binary_Synchronous_Transmission   (283 words)

  
 Synchronous universal binary scrambler - Patent 4187392
It is the fifth object of this invention to provide a universal synchronous binary cryptographic equipment in which all the numerous bit-rates are derived from a single standard oscillator of one megacycle frequency.
The input binary signals from transmitting terminal-equipment 2 and line 5 are received at the input terminals 111 and 121 of chassis 110 and 120, respectively, and thence coupled via two-legged circuits 133 and 134 to the timing and phasing units 112 and 122, and the ciphering mixers 116 and 126.
After initial synchronization it only has to compensate for the drift of the oscillator of the transmitter and receiver and oscillator 101 which rarely exceeds 2 parts in 1 million and is usually less.
www.freepatentsonline.com /4187392.html   (12626 words)

  
 COMMUNICATIONS Data Transmission
The bandwidth is a measure of the transmission rate of communications channels.
Serial transmission is typically slower than parallel transmission, because data are sent sequentially in a bit-by-bit fashion.
Because a large block of data being sent synchronously cannot be interrupted, a synchronized clock is necessary to carefully schedule the transmission of information.
home.olemiss.edu /~misbook/cm6.htm   (812 words)

  
 What Is Binary Synchronous (Bisync) Protocol?
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 1964 with the introduction of a product called the 270X Transmission Control Unit.
The full name of the protocol is the "Binary Synchronous Communication" protocol.
www.serengeti.com /what_is_bisync.php3   (641 words)

  
 Arelnet Home   (Site not responding. Last check: 2007-10-16)
A measure of transmission speed which describes the actual number of signals per second that are transmitted over the line.
Binary, where only two values or states are possible for a particular condition (such as “ ON or OFF” or “ 1 or 0”), is the only way present day digital computers can function.
Transmission is tracked at block level by counting the number of blocks in error and the number of blocks per second the line can sustain without adversely affecting performance.
www.arelnet.com /show/dictionary.asp?First=B   (894 words)

  
 Glossary   (Site not responding. Last check: 2007-10-16)
A form of telecommunication line control that uses a standard set of transmission control characters and control character sequences, for binary synchronous transmission of binary-coded data between stations.
Linear LAN architecture in which transmissions from network stations propagate the length of the medium and are received by all other stations.
Term used to refer to a series of consecutive binary digits that are operated upon as a unit (for example, an 8-bit byte).
www.hifn.com /support/Glossary_B.html   (712 words)

  
 bin from FOLDOC
It is easier to convert decimal numbers to and from BCD than binary and, though BCD is often converted to binary for arithmetic processing, it is possible to build hardware that operates directly on BCD.
Binary files may also be used to store data output by a program, and intended to be read by that or another program but not by humans.
The FTP utility must be put into "binary" mode in order to copy a binary file since in its default "ascii" mode translates between the different newline characters used on the sending and receiving computers.
wombat.doc.ic.ac.uk /foldoc/foldoc.cgi?query=bin   (1595 words)

  
 Glossary - Glossary
In binary synchronous communications, a transmission control character sent as an affirmative response to a data transmission.
Data transmission in which transmission of a character or block of characters can begin at any time, but in which the bits that represent the character or block have equal time duration.
Transmission media and techniques that use a broad frequency range, divided into sub-bands of narrower frequency, so that different kinds of transmission can occur at the same time.
publib16.boulder.ibm.com /pseries/en_US/aixuser/glossary/glossary02.htm   (12338 words)

  
 Glossary
Binary-A system of numerical notation in which only the values of 0 and 1 are used.
The use of a binary number with a key of more than 72 quadrillion combination to scramble the transmission of a message.
Transmission acknowledgment-The acknowledgment that a total transmission was received with no error detected.
www.tradanet.intnet.mu /glossary.htm   (5899 words)

  
 B
A form of telecommunication line control that uses a standard set of transmission control characters and control character sequences, for the binary synchronous transmission of binary-coded data between stations.
Linear LAN architecture in which transmissions from network stations propagate the length of the medium and are received by all other stations.
A term used to refer to a series of consecutive binary digits that are operated upon as a unit (for example, an 8-bit byte).
www.cisco.com /univercd/cc/td/doc/cisintwk/ita/b12.htm   (2694 words)

  
 RFC 1549 (rfc1549) - PPP in HDLC Framing
Aborting a Transmission On asynchronous links, frames may be aborted by transmitting a "0" stop bit where a "1" bit is expected (framing error) or by transmitting a Control Escape octet followed immediately by a closing Flag Sequence.
The bit stream is examined on a bit-by-bit basis for the binary sequence 01111110 (hexadecimal 0x7e).
Aborting a Transmission A sequence of more than six "1" bits indicates an invalid frame, which is ignored, and not counted as a FCS error.
www.faqs.org /rfcs/rfc1549.html   (3912 words)

  
 COMMUNICATIONS Data Transmission
Serial transmission is typically slower than parallel transmission, because data are sent sequentially in a bit-by-bit fashion.
Synchronous Transmission: Large volumes of information can be transmitted at a single time with synchronous transmission.
Because a large block of data being sent synchronously cannot be interrupted, a synchronized clock is necessary to carefully schedule the transmission of information.
sunset.backbone.olemiss.edu /~misbook/codatrm.htm   (813 words)

  
 Glossary of computer communications acronyms and terms.
An IBM standard for synchronous transmission of binary-coded data as a serial stream of binary digits.
Simultaneous transmission in both directions, sometimes referred to as full duplex to differentiate it from half duplex, which alternates transmission in one direction, then in the other.
A transmission or data processing mode in which the data is entered in an interactive session where an application can respond fast enough to affect later data input.
www.quadron.com /speed/speed.html   (1552 words)

  
 Glossary
A synchronization processing level, specified during allocation of a conversation, that enables a transaction program to solicit acknowledgment from its partner TP of a message sent to the partner TP.
A binary code system in which a signal condition must be sustained for the full time interval and does not revert to a standby or quiescent state between signal elements.
Session control is used to purge data flowing in a session after an unrecoverable error occurs, resynchronize the data flow after such an error, and perform cryptographic verification; and (b) an RU category used for requests and responses exchanged between the session control components of a session and for session activation/deactivation requests and responses.
www-306.ibm.com /software/network/commserver/library/publications/csaix_60/dyyl1m05.htm   (17574 words)

  
 Synchronous Transmission   (Site not responding. Last check: 2007-10-16)
In order to increase the efficiency of transmission the asynchronous requirement for a stop and start bits for each character is not needed but some synchronisation characters must be added to the message.
Synchronous transmission allows for a continous stream of data and much higher data transmission rates than asynchronous.
In order to synchronise the transmitter and receiver in bit-orientated protocol transmission the transmitter adjusts the bit stream in such a way so as to allow the receiver to use sophisticated timing methods by sending a preamble series of bits before a frame transmission.
www.cems.uwe.ac.uk /jharney/syn.html   (360 words)

  
 UNICOMM Wireless and More
A transmission method or way of sending voice, video and data-using signals (such as electricity or sound waves) that are continuously variable rather than discreet units as in digital transmissions.
An open wireless transmission standard allowing two-way 19.2-Kbps packet data transmission over existing cellular telephone channels (AMPS with CDPD capability.) In essence, CDPD technology uses idle network capacity caused by pauses in phone conversations and gaps between calls placed, etc. to transmit data.
Wireless transmission networks are comprised of many hexagonal, overlapping cell sites to efficiently use radio spectrum for wireless transmissions.
www.unicomm.com /glossary_a-f.htm   (1511 words)

  
 Smart Computing Dictionary Entry - Binary Synchronous Communications (BSC)   (Site not responding. Last check: 2007-10-16)
Asynchronous communication is more efficient in large networks made of many computers sending small amounts of data because it doesn’t require a sustained connection between the sender and receiver, leaving network lines open for other transmissions in between each packet.
IBM developed BSC as a protocol for synchronous communication that is mostly used by mainframe networks transmitting large amounts of data, and requires both machines to synchronize their transmission rates (governed by their processor clocks) to work.
BSC sends each transmission with header and footer data that indicates the beginning and end of each transmission, and provides synchronization information, as well as specific information about transmitted data for error-checking purposes.
www.smartcomputing.com /editorial/dictionary/detail.asp?searchtype=2&DicID=6288&RefType=Dictionary&guid=8CF5E5CB35CB42E1857F6F42970E2A2C   (169 words)

  
 Data Transmission   (Site not responding. Last check: 2007-10-16)
If the transmission can take place in both directions, but not at the same time, we say that the transmission is half-duplex, and if it can take place at the same time in both directions it is full-duplex.
Usually the binary data is used to modify some characteristics of a sinusoidal signal, the carrier.
Synchronous transmission is more complex but with lower overhead (thus more efficient in terms of utilization of the communication channel) than asynchronous transmission.
www.cis.temple.edu /~ingargio/cis307/readings/datatrans.html   (2637 words)

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