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Topic: Token bus

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	Token Bus Network (Linktionary term)
		A token bus network is similar to a token ring network in that a station must have possession of a token before it can transmit on the network (see "Token and Token-Passing Access Methods").
		Token bus topology is well suited to groups of users that are separated by some distance.
		IEEE 802.4 token bus networks are constructed with 75-ohm coaxial cable using a bus topology.
	www.linktionary.com /t/token_bus.html (359 words)

	Token Bus and Token Ring
		Token Bus was a 4 Mbps Local Area Networking technology created by IBM to connect their terminals to IBM mainframes.
		Token Ring was created by IBM to compete with what became known as the DIX Standard of Ethernet (DEC/Intel/Xerox) and to improve upon their previous Token Bus technology.
		Token Ring uses a ring based topology and passes a token around the network to control access to the network wiring.
	www.inetdaemon.com /tutorials/lan/token/index.shtml (518 words)

	Token bus
		Token bus is token ring over a virtual ring on a coaxial cable.
		A token is passed around the network nodes and only the node possessing the token may transmit.
		If a node doesn't have anything to send, the token is passed on to the next node on the virtual ring.
	www.ebroadcast.com.au /lookup/encyclopedia/to/Token_bus.html (82 words)

	CMSC 406, MSCS 560 Computer Networks
		Token passing is a mechanism for controlling access to a shared medium.
		A token ring may adopt one of two strategies for reissuing the token -- a) delayed release -- reissuing the token when the frame has circulated around the ring and been removed, or b) early release -- reissuing the free token immediately after the last bit of the preceding frame has been transmitted.
		In the example below, we assume that the token holding time is 610 units, where a unit is the amount of time needed to transmit 610 bytes, and the target token rotation time is 1600 bytes.
	www.academic.marist.edu /~jzbv/networks/TokenRingLecture.htm (2071 words)

	[No title] (Site not responding. Last check: 2007-11-06)
		A token bus is a common type of network topology (a path used to transfer data from a source to a destination) and uses a token (a passing mechanism) to regulate traffic on the bus.
		The token bus network is commonly used in assembly line and factory automation environments, where real-time processing is required.
		Token bus protocol uses Differential Manchester coding which uses signal changes in the middle of each bit to indicate high and low states.
	pigseye.kennesaw.edu /~pbehr/toknbus.htm (1109 words)

	-=* Bus Token =- The value zero indicates that no options are in use. (Site not responding. Last check: 2007-11-06)*
		Token bus networks are defined the IEEE 802.
		Token Bus MIB Working Group K. Implicitly tied to the notion of an type's syntax and encoding is how the object type is represented when being transmitted on the network.
		Wyre Council Bus Token Wyre Council 10 Pence Bus Token For collectors of transport tokens.
	www.aboutcarpetcleaning.info /Bus-Token.html (764 words)

	The Token Bus Protocol
		As such the Retrospective Token Bus Protocol is very suited to high network usage applications such as multi media networks such as domestic networks.
		As such the token is passed explicitly from the current unit to the next logical unit.
		Retrospective Token Bus network but Bluetooth is not suited as a LAN on itself.
	wrldcomp.com /the_token_bus_protocol/index.html (2007 words)

	Network system using token-passing bus with multiple priority levels - Patent 4930121
		With the use of the taken-passing bus, the individual nodes 1-1 to 1-n are given their specific addresses in advance, and a token is sequentially shifted from the node of a large address to those of small addresses.
		According to the token-passing bus system, data to be sent by the individual nodes 1-1 to 1-n is allocated to four types of access levels in accordance with the desired transmission priority, and priority process is executed based on the token-passing bus priority algorithm defined by the IEEE 802.4.
		With a data transmission using the token passing system, a node executes data exchange with another node by transmitting command data to a node that is destined for the data exchange and then by receiving response data from the destination node.
	www.freepatentsonline.com /4930121.html (7710 words)

	Token Ring
		The tokens are generated by a monitor station (a Node nominated by the other Nodes on the network when it is first switched on).
		A token packet is passed round the network which grants permission to each station wishing to transmit data.
		A major disadvantage of the token ring network is when failures occur such as a broken cable the network stops operation and so special test routines only available from the network controller are required to assist in fault location.
	homepages.uel.ac.uk /u0110214/TokenRing.htm (458 words)

	Token Bus - Wikipedia
		Bei Token Bus hingegen ist das Risiko geringer, sofern der Bus nicht durchtrennt wird.
		Wird das ankommende Token nicht benötigt, wird ein neues Token mit der Nachbaradresse erstellt und weitergeschickt.
		Eine typische Anwendung von Token Bus ist ARCNET oder der Feldbus Profibus.
	de.wikipedia.org /wiki/Token_Bus (196 words)

	[No title] (Site not responding. Last check: 2007-11-06)
		In a single bus multiplrocessor system, only one processor is allowed to use the the bus at any time though many may request the use of the bus simultaneously.
		Bus request is routed back to the beginning of the daisy chain and turned into Bus grant.
		When the device is done with the bus it generates a "1" token to be latched to the next device to the right, thus making the current device last relative to the ring structure.
	web.engr.oregonstate.edu /~sllu/471/bus.html (2092 words)

	Data Networks, Local area networks
		There are numerous token ring technologies, but all rely on the passing of a special frame called a token to control access to the medium.
		This is logically a token passing network as for the token ring, but the underlying network media is a bus and not a ring.
		This is logically a token-passing ring network implemented on a bus network and using a wiring layout (stations connected to a hub) which forms a star.
	www2.hawaii.edu /~petermar/ics451/topic4.htm (2238 words)

	' + pPage + ' (Site not responding. Last check: 2007-11-06)
		Token Ring departed from the peer-to-peer interconnection in favor of a repeating hub.
		Token Ring networks, despite their name, are implemented with a star topology and a circular access method, as shown in Figure 5.3.
		In this figure, 16Mbps Token Ring (shown logically as a loop, rather than in its topologically correct star) is used to interconnect the user stations and FDDI loops are used for the servers and backbone tier.
	www.officewizard.com /books/network/ch05.htm (3468 words)

	ITNW 2313 - Exploring Network Topologies
		An important characteristic to remember in bus topologies is that all data signals are broadcast throughout the bus structure.
		Token Ring uses central wiring hubs, and each node is wired to the hub with an individual run of cable.
		Token Ring is wired in a physical star to obtain the advantages of a central wiring hub.
	www.delmar.edu /Courses/ITNW2313/topology.htm (2156 words)

	WildPackets - Introduction
		The concept of passing a token message to grant the right to access the physical network media is not unique to the 802.5 standards.
		In a Token Passing Bus architecture the token message must have an address, since it is being sent to the 'next' station in a logical, numerically sequential, ordering of devices.
		The token message is sent from one station to the next and finally back to the first station.
	www.wildpackets.com /support/compendium/token_ring/introduction (655 words)

	CS 635, Lecture 5, Part 1 (Site not responding. Last check: 2007-11-06)
		In a token ring system with n stations and T sec to send a frame, no frame will wait more than nTsec to be sent (this is the upper bound that is missing in 802.3).
		Physically, the token bus is a linear or tree-shaped cable.
		If the token sender does not hear a vlid frame following its token pass, it attempts to asses the status of the network and may implement measures to pass around the problem station by establishing a new successor.
	members.tripod.com /~vsukonnik/lecture5-1.html (1121 words)

	token bus network - Internetnews.com - Webopedia.com
		A type of local-area network (LAN) that has a bus topology and uses a token -passing mechanism to regulate traffic on the bus.
		A token bus network is very similar to a token ring network, the main difference being that the endpoints of the bus do not meet to form a physical ring.
		Token bus networks are defined by the IEEE 802.4 standard.
	inews.webopedia.com /TERM/T/token_bus_network.html (93 words)

	Token Ring FAQ (Site not responding. Last check: 2007-11-06)
		Token Ring was introduced at roughly the same time but suffered from an early dispute over a patent meaning potential users stayed away until this was resolved.
		Token Ring was backed by IBM (the king of the computer industry in the early 1980's) meaning its popularity was almost guarenteed.
		The Token Bus standard resulted from a compromise between people who did not like the non-detministic nature of CSMA/CD or the active repeater element within Token Ring.
	www.cs.bham.ac.uk /~gkt/Teaching/SEM335/token/faq.html (601 words)

	BlackNews.com - Historical Token Commemorates Civil Rights Bus Boycott With Cufflinks (Site not responding. Last check: 2007-11-06)
		The bus token that was a mighty symbol of the struggle and used by thousands of Blacks to ride Montgomery's segregated buses has been made available to the public.
		Other token items that are sold are very prestigious award medallions, pendants, t-shirts, and now the cufflinks commemorating the 381-day boycott that was prompted by the Dec. 1st arrest of Rosa Parks in 1955.
		The actual bus token used during the Montgomery bus boycott was preserved by his great-grandmother.
	www.blacknews.com /pr/token101.html (304 words)

	datalink
		Token Ring performance does not deteriorate to the same extent as Ethernet when network traffic increases.This means that at high loads, the presence of collisions of data frames on Ethernet networks becomes a major problem and can seriously affect the throughput.
		Token Bus is not as deterministic as Token Ring but like Token Ring it has excellent throughput and efficiency at high load.
		Token Bus uses broadband transmission and cabling which obviously gives it a bandwidth advantage over Token Ring but the downside is the equipment costs (modems, wideband amplifiers, etc).The IEEE 802.4 protocol is also extremely complex compared to IEEE 802.5 and it has a substantial delay at low loads.
	ntrg.cs.tcd.ie /mepeirce/Dce/98/token/compare7.htm (378 words)

	Reliable broadcast protocol for a token passing bus network - Patent 4725834
		The possible token sites are identified in a token list to which stations may be added or from which stations may be deleted.
		The token list is transmitted to all stations in the broadcast group to assure that no more than one token site exists at any instant of time.
		For example, a token may be passed from a present primary receiver to a next primary receiver.
	www.freepatentsonline.com /4725834.html (8400 words)

	IEEE 802 Standards
		Token bus and token ring: Every device within the LAN knows about the address of the device to its "right" or "left".
		Whichever device holds this token is allowed to send data, afterwards it gives the token to its neighbour.
		The difference between token bus and token ring is the physical layout of the network; the token is always passed around in a (virtual) circle.
	www.ictglobal.com /ICT009/ieee_802_standards.html (422 words)

	token bus network Definition: TechEncyclopedia from TechWeb
		Stations are logically connected in a ring but are physically connected by a common bus.
		All tokens are broadcast to every station in the network, but only the station with the destination address responds.
		After transmitting a maximum amount of data, the token is passed to the next logical station in the ring.
	www.techweb.com /encyclopedia/defineterm.jhtml?term=token+bus+network (277 words)

	Topology
		The bus requires the least amount of cable to connect the computers together and is therefore less expensive than other cabling arrangements.
		The difference between a token bus and a token ring is that with a token ring, the LAN does not use a master controller to control the token.
		The bus network might be missing a terminator and you exceeded the maximum cable length for the network by adding new cable.
	home.att.net /~charlie.net/cMctopology.htm (1073 words)

	45. Token Ring (cont'd) (Site not responding. Last check: 2007-11-06)
		Token Ring has been used mainly in large corporations and was considered in the past to be the only way to handle data communications in large networks (1000+) nodes.
		Token Ring equipment is more expensive than Ethernet and is one of the reasons that Ethernet is more popular.
		Token Ring is a token passing bus arbitration.
	www.techbooksforfree.com /intro_to_data_com/page176.html (155 words)

	RFC 1230 (rfc1230) - IEEE 802.4 Token Bus MIB
		RFC 1230 (rfc1230) - IEEE 802.4 Token Bus MIB
		RFC 1230 - IEEE 802.4 Token Bus MIB
		In particular, this memo defines managed objects used for managing subnetworks which use the IEEE 802.4 Token Bus technology described in 802.4 Token-Passing Bus Access Method and Physical Layer Specifications, IEEE Standard 802.4.
	www.faqs.org /rfcs/rfc1230.html (2413 words)

	Networking Coursebook - Chapter 2 (Site not responding. Last check: 2007-11-06)
		Token Ring technology allows for devices with token ring cards in them to revert to a bus topology in the event their usual topology (a ring) is broken.
		Though tokens are mostly used with ring topologies (to be discussed later), standards exist for what is known as a token bus.
		Token ring LANs, and their FDDI cousins, are the most sophisticated, fault-tolerant, and, consequently, the most ex-pensive systems available in the current marketplace.
	www.netguru.net /courses/ntc/NTCC2.htm (8125 words)

	token - Inside ID Online Glossary of Identity Management Terminology
		For example, a token could be a keyword, an operator, or a punctuation mark.
		As the token circulates, computers attached to the network can capture it.
		There is only one token for each network, so there is no possibility that two computers will attempt to transmit messages at the same time.
	insideid.webopedia.com /TERM/T/token.html (192 words)

	Local Area Networks - Medium Access Control Methods
		On the network, a control token is a kind of package which is created on the network once.
		The control token prevents the collisions on the network because it ensures that only one DTE with the token can send data on the network.
		In some cases, the token is assigned a priority allowing higher priority frames to be sent before the token.
	www.ii.metu.edu.tr /~ion504/demo/lan/html/medium.html (785 words)

	Biologie - Token Bus (Site not responding. Last check: 2007-11-06)
		Bei Token Bus hingegen ist das Risiko geringer, sofern der Bus nicht durchtrennt wird.
		Wird das ankommende Token nicht benötigt, wird ein neues Token mit der Nachbaradresse erstellt und weitergeschickt.
		Eine typische Anwendung von Token Bus ist ARCNET oder der Feldbus Profibus.
	www.biologie.de /biowiki/Token_Bus (205 words)

	Network Topologies
		A network in which all nodes are connected to a single wire (the bus) that has two endpoints.
		bus topology: All devices are connected to a central cable, called the bus or backbone.
		Bus networks are relatively inexpensive and easy to install for small networks.
	members.fortunecity.com /snackwell/help/networktopology.htm (5197 words)

	[No title]
		Token Ring performance depends heavily on the type of machine/bus/net card used for the measurements.
		Token Ring technology was developed in the 1970s by IBM.
		If a node receiving the token has no information to send, it passes the token to the next end station.
	www.lycos.com /info/token-ring.html (299 words)

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