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Topic: Asynchronous communications system

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	Encyclopedia: Asynchronous communications system (Site not responding. Last check: 2007-10-09)
		A synchronous/asynchronous data communications system as in claim 1 wherein said means for providing periodic time periods of predetermined length includes a central processor unit and further comprises a plurality of timers controlled by said processor, whereby said periodic time periods are superimposed on time during which asynchronous transmissions occur.
		A synchronous/asynchronous data communications system as in claim 14 wherein each of said multiplex terminals includes a microprocessor and wherein said non-regenerative timing means periodically interrupts the program of said microprocessor included in said system controller terminal thereby transferring program control to a subprogram containing instructions to issue a timing signal.
		A digital communication system as in claim 23 wherein said asynchronous control means includes second timing means initialized by reception of said identifiable messages and providing an output at a point in time after which new data messages will not be accepted from ones of said second plurality of data sources interfaced to the terminal.
	www.nationmaster.com /encyclopedia/Asynchronous-communications-system (509 words)

	Asynchronous communications system - Patent 4803481
		The communications system of claim 1 wherein said master comprises at least one transmitter circuit having conditioning means receptive of an input signal of high and low logical states for providing a conditioned signal to one of said channels of the same logical state as said input signal.
		The communications system of claim 1 wherein said slave comprises at least one transmitter circuit having conditioning means receptive of an input signal of high and low logical states for providing a conditioned signal to one of said channels of the same logical state as said input signal.
		The communications system of claim 1 further comprising a second slave connected to said communication transmission means and an interchange means for coupling to said communication transmission means and responsive to said master for selectively transferring said logical state on at least one of said channels to at least one of said slaves.
	www.freepatentsonline.com /4803481.html (9613 words)

	Asynchronous communications system - Wikipedia, the free encyclopedia
		In telecommunication, an asynchronous communications system (start-stop system) is a data communications system that uses asynchronous operation.
		In an asynchronous communications system, extra signal elements are usually appended to the data for the purpose of synchronizing individual data characters or blocks.
		The time spacing between successive data characters or blocks may be of arbitrary duration.
	en.wikipedia.org /wiki/Asynchronous_communications_system (107 words)

	[No title] (Site not responding. Last check: 2007-10-09)
		A system and method are needed for reducing the complexity of and the processing resources used during the cell search and mobile positioning processes in asynchronous networks.
		System 200 is preferably an asynchronous CDMA mobile communications system that includes, for illustrative purposes, three BSs and three MSs.
		The system of Claim 15, wherein said mobile station is operable to compare said at least one estimated relative time difference value to said matched filter output signal, and determine if said at least one estimated relative time difference value is likely to correspond to a matched filter output signal peak.
	www.wipo.int /cgi-pct/guest/getbykey5?KEY=99/41854.990819&ELEMENT_SET=DECL (8281 words)

	Asynchronous Communication (Site not responding. Last check: 2007-10-09)
		In a distributed system, communication between elements is inherently asynchronous.
		Asynchronous communications were necessary to manage peripheral devices with a vast spectrum of clock rates.
		In contrast, the underlying architecture mechanism for asynchronous communication is a queue.
	www-db.stanford.edu /~burback/dadl/node93.html (155 words)

	Communications Overview (Site not responding. Last check: 2007-10-09)
		One important characteristic of communication systems is that of synchronicity.
		Asynchronous communications systems allow for the sender and receiver of data to work "out of sync," or at different times.
		The impact of electronic communications systems is most notable in those systems which are asynchronous but fast enough to be applied in synchronous modes on demand.
	www.assumption.edu /html/academic/docs/CS80/overview.html (2706 words)

	[No title]
		In a computer or data transmission system, to terminate, usually in a controlled manner, a processing activity because it is impossible or undesirable for the activity to proceed.
		Problems requiring aperture correction arise in a scanning system when the frequency response falls off as the effective wavelength of the detail to be resolved in the image approaches the dimension of the scanning aperture and becomes zero when that effective wavelength equals the dimension of the scanning aperture.
		asynchronous transmission: Data transmission in which the instant that each character, or block of characters, starts is arbitrary; once started, the time of occurrence of each signal representing a bit within the character, or block, has the same relationship to significant instants of a fixed time frame.
	www.its.bldrdoc.gov /projects/devglossary/alldef1.html (16477 words)

	ASCII Character Code Reference
		Some systems use the character to indicate a [BREAK] signal has been sent, even though an actual asynchronous modem break has no character code and is actually represented by a period exceeding at least one charactaer transmission time in duration with all spacing and no marking.
		On some operating systems that are aware that the client is using a hard copy terminal, transmitting this character to the server causes the server to send a sequence of characters that indicate that the previous character has been discarded, but the print head does not actually back over the now-erased character.
		In these display control systems, the characters that immediately follow the ESC character instruct the receiving device to reposition the display cursor or printing position, erase the screen or reposition paper, alter character sets or display colors to be used from this point forward, even start or stop peripherals attached to the terminal.
	nemesis.lonestar.org /reference/telecom/codes/ascii.html (3797 words)

	' + pPage + '
		At the receiving end of the communication, characters are recognized by the start and stop signals instead of by the timing of their arrival.
		The asynchronous interface is character-oriented and has about a 20 percent overhead for the extra information needed to identify each character.
		These are high-speed communications ports that far outstrip the capabilities of the standard serial and parallel ports most systems contain today, and may be used as an alternative to SCSI for high-speed peripheral connections.
	cma.zdnet.com /book/upgraderepair/ch11/ch11.htm (18979 words)

	First of many AT&T products for new multimedia networks (Site not responding. Last check: 2007-10-09)
		NEW YORK -- AT&T's business communications systems unit today unveiled the first product to bridge the separate worlds of private voice and data networks and laid out its strategy to bring multimedia communications to businesses worldwide.
		By the end of 1996, it will be part of a new communication systems and technology company with more than $20 billion in annual revenues.
		Communications middleware is system software layered between the applications software and the operating system and/or network transport software.
	www.lucent.com /press/1095/951030.gba.html (1838 words)

	Asynchronous communications system: Definition and Links by Encyclopedian.com - All about Asynchronous communications ...
		In telecommunication, an asynchronous communications system is a data communications system that uses asynchronous operation.
		Note 1: In an asynchronous communications system, extra signal elements are usually appended to the data for the purpose of synchronizing individual data characters or blocks.
		Note 2: The time spacing between successive data characters or blocks may be of arbitrary duration.
	www.encyclopedian.com /as/Asynchronous-communications-system.html (98 words)

	Computer, Telephony and Electronics Glossary and Dictionary
		When one system wants to send data to another, the first system encodes the data into ASN.1, sends the data, and the second system receives and decodes the data using the decoder written in the language used on that system.
		Asynchronous Transfer Mode is an emerging technology designed to facilitate the need for high-speed transmission of voice, video and data using the public telephone network, and therefore providing a solution for improper bandwidth allocation.
		In security systems, authentication is distinct from authorization, which is the process of giving individuals access to system objects based on their identity.
	www.csgnetwork.com /glossarya.html (9509 words)

	Hp’s Evaluation of Angela’s TopClass Project
		The system did not let her construct the question sets she planed to implement.
		In this short 4 to 5 weeks period she was not able to change her plans and adopt her didactical ideas at the requirements of the system TopClass.
		There is a asynchronous communications system between students and teachers and within students.
	tecfa.unige.ch /staf/staf-d/heeb/staf18/topclass.html (847 words)

	RFC 190 (rfc190) - DEC PDP-10-IMLAC communications system
		The standard IMLAC is a 16-bit minicomputer with 4K of 2 microsecond core, a cycle-stealing display, an input keyboard, and an asynchronous serial communication interface.
		Each display console in the system may be in "display mode" or "teletype simulation mode".
		In the present implementation, display areas are numbered system- wide whereas strings are numbered from 1 to N within a display area.
	www.faqs.org /rfcs/rfc190.html (2536 words)

	Asynchronous Communications (Linktionary term)
		Asynchronous communication is the transmission of data between two devices that are not synchronized with one another via a clocking mechanism or other technique.
		In the mainframe/terminal environment, where asynchronous and synchronous transmissions were used abundantly, an asynchronous transmission is used to transmit characters from a terminal in which the user presses keys periodically.
		The receiving system knows to wait for the next keypress, even though that may take a relatively large amount of time.
	www.linktionary.com /a/asynchronous.html (264 words)

	Champions Technical Support Library's hardware concepts: AB
		Asynchronous communications requires less sophisticated and less expensive instrumentation than synchronous; that is why it is the most common form of communications for PCs.
		Communications software usually provides PC with the codes to emulate terminals normally connected to a minicomputer and/or mainframe computer.
		Bulletin Board System located in a "host" computer equipped with database and telecommunications software, modem and phone linne so that it can interact with remote computer systems via telephone lines.
	home.earthlink.net /~champions/h_ab.htm (1838 words)

	[No title] (Site not responding. Last check: 2007-10-09)
		This system is set-up to use 2 stop bits, 7 data bits and odd parity.
		To achieve this goal, the system would probably use: (a) Priority Polling (b) A PIC (c) Round-robin polling (d) Mutual Exclusion (e) None of these.
		In an 8086 system, a new interrupt handler is written to replace the interrupt handler associated with inter- rupt type 9.
	ece-www.colorado.edu /~ecen2120/OldExams/2120F02ex2.txt (1129 words)

	New Page 1 (Site not responding. Last check: 2007-10-09)
		The system sidestepped the issue of version control by providing users with a means of explicit resynching document versions.
		In asynchronous collaborative writing, people work on the document at different times, and many times they just want to annotate the text but not necessary to have a conversation with other co-writers if the issue is not critical.
		The integrated synchronous and asynchronous collaboration (ISAAC) project [1] is constructing a communication and collaboration system to bridge traditional workgroup barriers of time and space.
	www.cs.ubc.ca /~qzheng/ThesisIdea/as.html (626 words)

	Stallion Technologies Customer Services
		In the case of low speed synchronous communications using X.21 (bis), the electrical interface supported is RS-232-C / V.24 with a male DB25 connector or in some cases V.35 on a male M34 connector.
		This is used for high noise immunity at higher asynchronous transmission rates for shielded twisted pair operation up to 4,000 feet (@9600bps).
		In the case of high-speed synchronous communications using X.21, the electrical interface is also RS-422-A with a male (transmitting) or female (receiving) DB15 connector.
	www.stallion.com /partners/info/tech_tr/5a6498d.htm (1529 words)

	asynchronous from FOLDOC (Site not responding. Last check: 2007-10-09)
		system> A process in a multitasking system whose execution can proceed independently, "in the background".
		Other processes may be started before the asynchronous process has finished.
		A communications system in which data transmission may start at any time and is indicated by a start bit, e.g.
	foldoc.org /?asynchronous (124 words)

	Motorola Mediacenter - Press Releases
		By integrating onto a single chip what would have been handled by multiple chips in the past, Motorola is offering system designers of both wired and wireless PC peripherals an effective way to reduce the number of system components.
		Motorola offers system solutions – including chips, software libraries, example application code, development tools, comprehensive technical documentation and engineering support – to help ease design, development and debug of customers’ embedded systems.
		A comprehensive set of development systems is available from Motorola for the 68HC908JB16 and other 68HC08 family devices.
	www.motorola.com /mediacenter/news/detail/0,1958,1704_1343_23,00.html (1048 words)

	HC05 Overview
		On-chip Serial Communications Interface (SCI) provides asynchronous communications, with software-selectable baud rates up to 250 K. The high-speed, synchronous 4-wire serial system Serial Peripheral Interface (SPI) is ideal for driving off-chip displays and peripherals.
		With its large LCD driving capability and low-power consumption, this family is well-suited to applications in hand-held communication equipment.
		The MMEVS is a two-board system which, when connected to your target system, acts just as the actual target device would.
	freescale.com /webapp/sps/site/overview.jsp?nodeId=016246zpdg2LcRkqhk (1312 words)

	Motorola Mediacenter - Press Releases (Site not responding. Last check: 2007-10-09)
		These and other features may help to ease design efforts and to lower overall system costs for embedded systems such as digital cameras, thermostats, portable computing devices, meters and medical instruments.
		Motorola’s 68HC908 Flash-based, single-chip 8-bit MCUs, such as the 68HC908LJ12, are engineered to provide the flexibility that an embedded systems designer needs for cost-effective software upgrades through in-application programmability and re-programmability during development and production, as well as in the field.
		Our strong focus on wireless communications and networking enables customers to develop smarter, simpler, faster and synchronized products for the person, work team, home and automobile.
	www.motorola.com /mediacenter/news/detail/0,1958,667_423_23,00.html (600 words)

	HC08 Overview
		The SCI can be used for communications between the microcontroller and a terminal, a computer, or in a network of microcontrollers.
		Typical applications of the BDLC module are in automobiles where multiple BDLC MCUs can communicate over a single or dual wire bus, eliminating the weight and bulk of wire harnesses and adding diagnostic capability.
		This family is suitable for a wide range of general-purpose applications where in-system programmable FLASH memory, ADC, asynchronous and synchronous serial ports, a 32 KHz PLL, and enhanced timers with PWMs are required.
	www.freescale.com /webapp/sps/site/overview.jsp?nodeId=0162462LcRyNkn (1096 words)

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