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Topic: Asynchronous Transfer Mode

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In the News (Fri 24 May 19)

  Asynchronous Transfer Mode
ATM is based on the switching of 53-byte cells, in which each cell consists of a 5-byte header and a payload of 48 bytes of information.
Thus, the ATM layer is responsible for relaying cells from the AAL to the Physical layer for transmission, and in the opposite direction from the Physical layer to the AAL for use in an endpoint.
ATM Adaptation layers are distinguished from one another based on the method by which the 48-byte cell payload constructed as a data stream generated by a higher-level protocol is passed to the ATM layer.
technet.microsoft.com /en-us/library/bb726929.aspx   (5328 words)

 Asynchronous transfer mode - Hill2dot0
Asynchronous transfer mode (ATM) derives its name from the fact that the transmission system can accommodate traffic arriving at fixed time intervals, which is demanded by voice and video applications, as well as bursty traffic that arrives at no preset rate.
ATM is akin to an escalator serving two types of traffic: people with infants who we assume should have priority access to the moving stairs and people who are able to wait.
ATM is a transmission scheme that combines aspects of statistical multiplexing and synchronous transfer mode.
www.hill2dot0.com /wiki/index.php?title=ATM   (1704 words)

  Asynchronous Transfer Mode (ATM) Switching
ATM is a cell-switching and multiplexing technology that combines the benefits of circuit switching (guaranteed capacity and constant transmission delay) with those of packet switching (flexibility and efficiency for intermittent traffic).
The ATM physical layer has four functions: Cells are converted into a bitstream, the transmission and receipt of bits on the physical medium are controlled, ATM cell boundaries are tracked, and cells are packaged into the appropriate types of frames for the physical medium.
ATM signaling uses the one-pass method of connection setup that is used in all modern telecommunication networks, such as the telephone network.
www.cisco.com /univercd/cc/td/doc/cisintwk/ito_doc/atm.htm   (7582 words)

 Asynchronous Transfer Mode - Wikipedia, the free encyclopedia
Asynchronous Transfer Mode (ATM) is a cell relay network protocol which encodes data traffic into small fixed-sized (53 byte; 48 bytes of data and 5 bytes of header information) cells instead of variable sized packets (sometimes known as frames) as in packet-switched networks (such as the Internet Protocol or Ethernet).
ATM will remain deployed for some time in higher-speed interconnects where carriers have already committed themselves to existing ATM deployments; ATM is used here as a way of unifying PDH/SDH traffic and packet-switched traffic under a single infrastructure.
An ATM cell consists of a 5 byte header and a 48 byte payload.
en.wikipedia.org /wiki/Asynchronous_Transfer_Mode   (2650 words)

 Asynchronous Transfer Mode (ATM)
The term Asynchronous Transfer Mode (ATM) strictly speaking refers to a generic mode of data transfer in which units of data being transmitted are not time related to each other.
The ATM layer is responsible for routing cells along the virtual path established during call setup and also performs multiplexing, de-multiplexing and header error control.
The ATM adaptation layer performs the transformation between the message format used by the higher layers and the fixed length cell format of the ATM layer.
www.sussex.ac.uk /USCS/NSG/atm.shtml   (924 words)

 Asynchronous Transfer Mode (ATM) > Asynchronous Transfer Mode (ATM)   (Site not responding. Last check: )
Asynchronous Transfer Mode is the progeny of both the telecom world and the computer-networking world.
Asynchronous, in the context of ATM, means that sources are not limited to sending data during a set time slot, which is the case with circuit switching, used in the old standby T1.
The ATM cell is 53 octets in length and is divided into two portions: the header, which is 5 octets, and the payload, which is 48 octets.
www.informit.com /articles/article.asp?p=21316   (2464 words)

 Asynchronous Transfer Mode | TelecomSpace
Asynchronous Transfer Mode (ATM) is a high-performance, cell-oriented switching and multiplexing technology that utilizes fixed-length packets to carry different types of traffic.
ATM is a technology that will enable carriers to capitalize on a number of revenue opportunities through multiple ATM classes of services; high-speed local-area network (LAN) interconnection; voice, video, and future multimedia applications in business markets in the short term; and in community and residential markets in the longer term.
ATM is considered as a specific packet oriented transfer mode based on fixed length cells.
www.telecomspace.com /vop-atm.html   (680 words)

 An ATM Tutorial   (Site not responding. Last check: )
The ATM network is also time independent, as their is no relationship between the timing of the source application and the network clock.
ATM, on the other hand, if used throughout the LAN, then the transition to a MAN or WAN would be "seamless", as the same language and technologies would be used throughout.
ATM is a scalable, flexible and "future-proof" technology that allows for transportation of various forms of information, including data, voice, video or multiples of them.
usuario.cicese.mx /~aarmenta/frames/redes/atm/tutorial1/tute.html   (3409 words)

 Asynchronous Transfer Mode
Asynchronous Transfer Mode (ATM) technology is based on the efforts of the International Telecommunication Union Telecommunication Standardization Sector (ITU-T) Study Group XVIII to develop Broadband Integrated Services Digital Network (BISDN) for the high-speed transfer of voice, video, and data through public networks.
ATM is a cell-switching and multiplexing technology that combines the benefits of circuit switching (constant transmission delay and guaranteed capacity) with those of packet switching (flexibility and efficiency for intermittent traffic).
ATM time slots are made available on demand, with information identifying the source of the transmission contained in the header of each ATM cell.
www.ba-stuttgart.de /~schulte/htme/55755.htm   (3513 words)

 Asynchronous Transfer Mode (ATM)
ATM is based on fixed-length, 53-byte cells, whereas other technologies employ frames that vary in length to accommodate different amounts of data.
Asynchronous refers to the characteristic of ATM in which transmission time slots don’t occur periodically but are granted at irregular intervals.
ATM is relatively new technology, and only a few suppliers provide the equipment necessary to support it.
www.measureup.com /testobjects/MS_NetEss/5a79371.htm   (728 words)

 Using Asynchronous Transfer Mode Modules   (Site not responding. Last check: )
The parameter specifies a sub-interface on the ATM port.
BigIron(config-subif-4/1.1)# atm pvc 1 300 vbr 10000 5000 200
When an ATM sub-interface is configured as a bridging interface, the MTU of the payload is 1528 bytes (compared to a default MTU of 4470 bytes and maximum MTU of 9180 bytes when the sub-interface is configured as a router interface).
www.foundrynet.com /services/documentation/sribcg/ATM.html   (7762 words)

 Asynchronous Transfer Mode Security
ATM is a high-speed connection-oriented networking standard envisioned to integrate in the network a variety of applications (voice, video, data, image, etc.) with different quality of service (QoS) requirements.
ATM security, as defined by the ATM Forum Security Working Group, is modeled after the ATM protocol reference model, which is divided into three planes: user, control, and management [5].
Currently, the ATM Forum Security Working Group is working on a specification for a control plane authentication service, which allows signaling entities (such as endpoints and switches) to validate the source and contents of the signaling message [6].
www.comsoc.org /ni/private/1997/may/Peyravian.html   (5644 words)

 ATM Portal
In April 2005, the ATM Forum, which was founded in 1991, merged with the Frame Relay Forum and the MPLS Forum to form the MFA (MPLS-Frame Relay-ATM) Forum.
ATM will apparently not be the technology to bring about convergence of voice and data.
But, ATM has been widely implemented in public networks, and corporate networks do connect to these public services in much the same way they used to connect to frame relay or X.25 services.
www2.rad.com /networks/infrastructure/atm/main.htm   (1258 words)

 Asynchronous Transfer Mode (ATM)   (Site not responding. Last check: )
ATM is a connection-oriented technique based on the use of fixed size packets termed cells.
The words transfer mode say that this technology is specific way of transmitting and switching through the network.
The term asynchronous refers to the fact that the packets are transmitted using asynchronous techniques, and the two end-points need not have synchronised clocks.
www.cs.ucl.ac.uk /staff/S.Bhatti/D51-notes/node41.html   (558 words)

 ATM (Asynchronous Transfer Mode) (Linktionary term)
ATM is a high-speed network technology that is designed for LANs, WANs, carrier and service provider networks, and Internet core networks.
ATM was originally defined by the telephone companies and has been heavily promoted by them as an end-to-end networking technology, as well as a voice technology.
In this respect, ATM is both a LAN and WAN technology that can potentially allow customers to replace their separate voice and data networks with a single network to handle both voice and data, as well as other multimedia content such as video.
www.linktionary.com /a/atm.html   (786 words)

 atm asynchronous transfer mode
ATM is a technology that will enable carriers to capitalize on a number of revenue opportunities through multiple ATM classes of services; high-speed local-area network (LAN) interconnection.
The ATM Forum is an international non-profit organization formed with the objective of accelerating the use of ATM (Asynchronous Transfer Mode) products and services through a rapid convergence of interoperability specifications.
Asynchronous Transfer Mode (ATM) is a technology that has the potential of revolutionizing data communications and telecommunications.
www.eeglossary.com /atm.htm   (676 words)

 Asynchronous Transfer Mode (ATM)
ATM is a complex network technology, developed by both   telephone companies ( Telecom) and computer communication companies ( Datacom).
ATM connections have properties which describe the kind of traffic carried over the connection and the way it is treated by the network.
ATM switches have ``  cross-connect tables'' to translate the VPI/VCI connection (or rather, link) identifiers in the incoming   ATM Cells to VPI/VCI combinations in outgoing ATM Cells.
margo.student.utwente.nl /simon/finished/thesis/thesis2/node26.html   (2972 words)

 ATM - Asynchronous Transfer Mode
ATM is used as a technology for the broadband transmission of telecommunications signals.
In asynchronous transfer mode, the information being transmitted is organized into cells.
ATM provides considerable flexibility, because the capacity of an individual subscriber's switched connection adapts to current requirements.
www.ericsson.com /technology/tech_articles/ATM.shtml   (69 words)

 Hill Associates - Asynchronous Transfer Mode (ATM) Courses
Uniquely combining some of the features of circuit-switched networks with some of the features of packet-switched networks, ATM seemed to be the long sought "grand unifying theory" of the telecommunications industry.
Over the years, ATM has been pushed back from the desktop, where Ethernet clearly rules, into the traditional place occupied by circuit-oriented packet technologies: the wide area network and the network backbone.
Today ATM is considered by many to be under pressure from the world of IP.
www.hill.com /training/topics/topic.asp?t=atm   (206 words)

 ATM (Asynchronous Transfer Mode)
ATM is a packet technology, which means that all the information sent over an ATM network is broken down into discrete packets.
ATM was designed specifically to handle broadband applications efficiently and at the same time let users give certain types of traffic priority treatment on the network.
ATM networks are linked together by a series of ATM switches that take in cells from various sources and switch them out again.
www.networkworld.com /details/450.html   (1030 words)

 Qwest | Wholesale | Resale - Asynchronous Transfer Mode (ATM)
ATM is offered on an intrastate basis in Arizona, Minnesota, New Mexico, South Dakota and Utah and is grandfathered in Colorado, Idaho, Montana, Oregon and Washington.
At the end of the initial service period, ATM service may be obtained on a month-to-month basis or for any of the specified fixed period Contract Service Arrangement (CSA).
ATM is ideal for data intensive business computing applications that require near-real-time mixed media, (e.g., data, video, and image) communications among multiple locations.
www.qwest.com /wholesale/pcat/resaleatm.html   (2651 words)

 Free Essay History of Asynchronous Transfer Mode (ATM)
Asynchronous Transfer Mode or ATM came about through the evolution of the Integrated Services Digital Network (ISDN) in the 1980's and the demand for high-speed packet communications.
The ATM cell was chosen to be 53 bytes (or octets) long of which 48 bytes would be user data and the remaining 5 bytes would be a header field.
ATM Adaptation Layer: This is actually split into two sub layers and lies between the ATM layer and other higher layers ensuring the correct mapping of user requirements with available ATM services.
www.echeat.com /essay.php?t=26457   (17033 words)

 ATM: Asynchronous Transfer Mode Protocol | NetworkDictionary
The Asynchronous Transfer Mode (ATM) composes a protocol suite which establishes a mechanism to carry all traffic on a stream of fixed 53-byte packets (cells).
ATM is a connection-oriented technology, i.e.; two systems on the network should inform all intermediate switches about their service requirements and traffic parameters in order to establish communication.
The ATM reference model, which has two forms - one for the user-to-network interface (UNI) and the other for the network-to-node interface (NNI), is divided into three layers: the ATM adaptation layer (AAL), the ATM layer, and the physical layer.
www.networkdictionary.com /protocols/atm.php   (358 words)

 Qwest | Wholesale | Asynchronous Transfer Mode (ATM) Service
Asynchronous Transfer Mode (ATM) Service requires the use of Customer Premises Equipment (CPE) that puts customer data into cells suitable for transmission over the Qwest® ATM network.
Asynchronous Transfer Mode (ATM) Service is available where facilities exist throughout Qwest's 14-state local service territory.
ATM is a high speed networking technology based on two very simple concepts-network conformity and QoS.
www.qwest.com /wholesale/pcat/datm.html   (2118 words)

 Asynchronous Transfer Mode
This manual has been revised to document all of the Asynchronous Transfer Mode changes that are part of the current release.
Describes the ATM device driver interface, its tasks and routines, and associated data structures.
Describes the ATM convergence module interface, its tasks and routines, and associated data structures.
www.pdc.kth.se /doc/osf/osf40b/HTML/AA-QDP5C-TE_html/atmprog1.html   (807 words)

 Asynchronous Transfer Mode
The ATM layer which is responsible for flow control, header generation and extraction, virtual circuit and path management and multiplexing.
ATM tries to do routing at a much lower level of the protocol stack than is the case in the OSI model.
It is this ability to do switching in hardware that makes the data rates of ATM possible whilst at the same time requiring that the packet size remain small.
www.sju.edu /~jhodgson/netw/atm.html   (293 words)

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