A standardized format for cell relay, with 53-byte cells including a five byte header and 48 bytes of data. Also, the layer in the protocol stack that translates the cells to the physical media.

A 53-byte cell switching technology well suited for carrying voice, data, and video traffic on the same infrastructure. It is inherently scalable in throughput and was designed to provide Quality of Service (QoS).

(ATM) A high speed packet switching technology used to transmit video, data, voice, etc. via fixed-length cells of 53bytes.

Edit / ATM - A high-speed cell switching network technology for LAN s and WAN s that handles data and real-time voice and video. It combines the high efficiency of packet switching used in data networks, with the guaranteed bandwidth of circuit switching used in voice networks and is currently used mostly by large WANS such as telephone companies or as backbones in large LAN installations. It was once thought that ATM would become popular to the desktop but its expense, coupled with tremendous improvements in Ethernet technology took ATM out of the running. ATM is widely implemented by telephone companies in their fiber loops (OCR-xx), ATM provides "bandwidth on demand" so customers can be charged for the amount of data they send rather than fixed-cost digital lines that often go underutilized.

A wide area network design that uses high-speed switching devices to route messages.

A transmission mode in which information is organized in cells (packets). It is asynchronous in the sense that the recurrence of cells depends upon the required or instantaneous bit rate.

(1) High bandwidth, low-delay packet switching and multiplexing technique used to transfer voice, video, images and character-based data. (2) Method of formatting, multiplexing, cross-connecting and switching information in 53 byte cells. (3) Transmission method that operates over various physical media, including Synchronous Optical Network (SONET), Synchronous Digital Hierarchy (SDH) and digital cross-connect (DCS) systems.

A mode of transferring data in fixed length packets or cells of 53 bytes. Each cell contains a fixed header of 5 bytes and an information payload of 48 bytes. Cells are allocated on a demand basis, hence the term asynchronous. source: EU-P103 domain: General acronyms: ATM usage: EU-P103

a multiplexing or switching technique in which information is organized into fixed-length cells with each cell consisting of an identification header field and an information field; the transfer mode

a type of switching technology in which the switches are small, fixed-length cells containing data.

Broad bank communication format. Transmission is controlled by start and stop bits at the beginning and end of each character. Time intervals between transmitted characters may be of unequal length. No other synchronizing or timing information need be transmitted.

The mode of broadband ISDN that transmits data in a packetized format. Compare with Synchronous Transfer Mode. Click here to view a diagram.

A high-bandwidth packet switching and multiplexing technique. Each cell in a stream is presented to the network on a start-stop basis (asynchronously), rather than having a circuit or a regular time slot reserved for the stream.

A fast packet-switching technology for carrying large volumes of data of different types (such as voice, video, fax and computer data) on wide-area networks.

Asynchronous Transfer Mode (ATM) Network Service is a form of 'fast packet' switching service for high speed networks which require flexible bandwidth, high-performance transport and switching for connectivity between and among widely distributed customer locations. Learn more.

A standard which defines high-load, high-speed (1.544Mbps through 1.2Gbps), fixed-size packet (cell) switching with dynamic bandwidth allocation. ATM is also known as "fast packet." [Source: RFC1983

ATM An international ISDN high-speed, high-volume, packet-switching transmission protocol standard. ATM uses short, uniform, 53-byte cells to divide data into efficient, manageable packets for ultrafast switching through a high-performance communications network. The 53-byte cells contain 5-byte destination address headers and 48 data bytes. ATM is the first packet-switched technology designed from the ground up to support integrated voice, video, and data communication applications. It is well-suited to high-speed WAN transmission bursts. ATM currently accommodates transmission speeds from 64 Kbps to 622 Mbps. ATM may support gigabit speeds in the future.

ATM is a technology used to pass information in "cells" (small frames) across a network. An ATM network consists of multiple ATM switches that forward each individual cell to its final destination. ATM can provide transport services for audio, data, and video.

A cell-switching technique using the cell relay method of transmission; i.e., 53-byte fixed-size cells to provide high-speed (150M bps and higher) local and enterprise-wide WAN transport. ATM is asynchronous in the sense that it is not synchronized in time to establish ownership; rather, a header field is added to each data block to identify ownership.

Cell switched technology. Uses 53 byte cells to transmit information (Voice or Data) across the ATM network.

n. A transfer mode in which the information is organized into cells; it is asynchronous in the sense that the recurrence of cells containing information from an individual user is not necessarily periodic. ATM is specified in international standards such as ATM Forum UNI 3.1.

ATM is designed to transfer voice, video, and other multimedia data that requires short bursts of large quantities of data that can survive small losses but must be broadcast in real time. ATM uses uniform 53-byte cells. (Each cell has a 5-byte address header and 48 bytes of data.) These short, standardized cells can be processed through a digital ATM switch very quickly, allowing for data transmission speeds surpassing 600 mbps. It also allows telephone and cable TV companies to dynamically assign bandwidth to individual customers.

A very high speed network utilizing SONET optical transmission methods through the public telecommunications system.

A high speed, connection-oriented switching and multiplexing technology for transmitting information across a wide area or local area network in units called cells. ATM divides information up into fixed-length cells capable of transmitting several different types of traffic simultaneously. It is asynchronous in that information streams can be sent independently, without a common clock. ATM can be described in three planes: The user plane coordinates the interface between protocols and ATM; The management place coordinates the layers of the ATM stack; and the control plan coordinates signaling, setting up and tearing down virtual circuits.

is a dedicated-connection switching technology that organizes digital data into 53-byte cell units and transmits them over a physical medium using digital signal technology. Because ATM is designed to be easily implemented by hardware (rather than software), faster processing and switch speeds are possible.

a means of digital communications that is capable of very high speeds; suitable for transmission of images or voice or video as well as data; "ATM is used for both LAN and WAN"

or "ATM" a switching and transmission technology that is one of a general class of packet technologies that relay traffic by way of an address contained within the first five bits of a standard fifty- three bit-long packet or cell. ATM-based transport was specifically developed to allow switching and transmission of mixed voice, data and video at varying rates

A high-speed, connection-oriented, data transmission technology thattransmits fixed-size cells rather than variable-length packets.

A high-speed multiplexing and switching method utilizing fixed-length cells of 53 obtects to support multiple types of traffic. Note: ATM, specified in international standards, is asynchronous in the sense that cells carrying user data need not be periodic.

Asynchronous transfer mode (ATM) is a packet data and switching technique that transfers information by using fixed length 53 by cells. The ATM system uses high-speed transmission (155 Mbps) and is a connection-based system. When an ATM circuit is established, a patch through multiple switches is set up and remains in place until the connection is completed. ATM service was developed to allow one communication media (high speed packet data) to provide for voice, data and video service.

Asynchronous Transfer Mode; technology that permits the sharing of transmission facilities between different data types (i.e. voice, data and video by carrying the data in small fixed-sized cells).

A switched network transmission technology that is highly scalable and provides typical speeds of up to 644 Mbps.  ATM services are highly reliable and commonly include Quality of Service (QoS) guarantees.  See also Frame Relay, Dedicated Leased Line.

ATM is a broad-bandwidth, low delay, packet-like (cell relay) switching and multiplexing technique. It is essentially connection oriented, although it is envisioned to support all services. ATM networks will accept or reject connections based on user's average and peak bandwidth requirements providing flexible and efficient service for LAN-to-LAN, compressed video and other applications that involve variable bit rate (VBR) traffic.

A cell- based data transfer technique in which channel demand determines packet allocation. ATM offers fast packet technology, real time, demand led switching for efficient use of network resources. It is also the generic term adopted by ANSI and the ITU-TS to classify cell relay technology within the realm of broadband WANs, specifically B-ISDN. In ATM, units of data are not time related to each other and, as part of the B-ISDN standard, is specified for digital transmission speeds from 34Mbit/s to 622Mbit/s. IBM currently offers ATM at a non standard 25Mbit/s format. ATM will be the high band width networking standard of the decade.

High bandwidth, low-delay, connection-oriented, packet switching technique requiring 53-byte, fixed-sized cells.

A switching technology that allows for the high-speed movement of voice, data and video information over a common data communications network.

A high bandwidth, controlled-delay fixed-size packet switching and transmission system. Uses fixed-size packets also known as "cells"; ATM is often referred to as "cell relay". ATM will provide the basis for future broadband ISDN standards.

Broadband ISDN mode similar to asynchronous time division multiplexing. ATM uses small fixed length packets called cells.

A network technology capable of transmitting data, voice, video, and frame relay traffic in real time. Data, including frame relay data, is broken into packets containing 53 bytes each, which are switched between any two nodes in the system at rates ranging from 1.5 to 622 Mbps. ATM is defined in the broadband ISDN protocol at the levels corresponding to levels 1 and 2 of the ISO/OSI model. It is currently used in local area networks involving workstations and personal computers. See also Integrated Services Digital Network; International Organization for Standardization Open Systems Interconnection model.

ATM) A high performance switching and multiplexing (sharing) technology that utilises fixed-length packets to carry different types of traffic. ATM technology can carry multiple classes of services such as high speed local area network ( LAN) interconnection, voice video and future multi-media business applications. It is widely used because of its flexibility and ability to streamline network operations with its underlying packet architecture. For example, network operators can centrally configure an ATM service to meet the bandwidth and quality of service characteristics selected by the customer. ATM systems typically operate at speeds of 2 to 155 megabits per second ( Mbps).

Asynchronous transfer mode (ATM) is a dedicated-connection switching technology that organizes digital data into 53-byte cell units and transmits them over a physical medium using digital signal technology.

ATM) A transfer method that dynamically allocates bandwidth using a fixed-size " packet," or "cell." Also known as "fast packet."

An international standard of connection-oriented technology used in both LAN and WAN environments.

A method for the dynamic allocation of bandwidth using a fixed- size packet (called a cell). ATM is also known as "fast packet".

"Asynchronous" is a fancy word for "same." ATM is a switching technology that allows voice, data and video information to be moved over the same (asynchronous) communications network.

(1) The CCITT standard for cell relay wherein information for multiple types of services (voice, video, data) is conveyed in small, fixed-size cells. ATM is a connection oriented technology used in both LAN and WAN environments. (2) A fast-packet switching technology allowing free allocation of capacity to each channel. The SONET synchronous payload envelope is a variation of ATM. (3) ATM is an international ISDN high speed, high-volume, packet switching transmission protocol standard. ATM currently accommodates transmission speeds from 64 Kbps to 622 Mbps.

A networking medium which uses a fixed-size packet, called a cell, to transfer data. ATM can handle the "high bandwidth" requirements of multimedia data transmission (video and sound data use an extremely large amount of bits).

A high-speed, connection-oriented switching and multiplexing technology for transmitting information across a wide area or local area network. ATM divides information into fixed-length cells capable of transmitting different types of traffic simultaneously, including voice, video, and data.

A very high-speed telecom transmission technology, it is a networking and communication protocol designed for the transfer of multimedia data. It is a high-bandwidth, low-delay packet-switching and multiplexing technique (based on a fixed-length 53-byte cell).

A method of sending audio, visual and computer data at the same time over one high-speed digital line.

A very high-speed method in which fiber-optic lines are used to simultaneously transmit audio and video data.

A networking protocol designed to move multimedia data around with high reliability and speed. Some Internet Service Providers (ISP) use ATM as the protocol for their backbones.

A transmission protocol which routes data in packets (or cells) of fixed 53 byte length. Each packet may take a different route over the network, arrive at irregular time intervals, but is ultimately reassembled, buffered, and output as the original data stream at the receiving end. (This sounds crude, but it is a really rich, and fast way to transmit data. Remember, only one stream of data can occupy a link at any given time - and everyone shares links. Each ATM packet, instead of waiting for its turn on a fixed link, takes any route it can find to get to its destination. There are always empty links somewhere - so why wait? While everyone else plays burst - wait - burst, ATM just keeps cooking!)

A network protocol that transmits data at a speed of 155 Mbps and higher. It is most often used to interconnect two or more local area networks.

(ATM): A transmission standard widely used by the telecom industry. A digital transmission switching format with cells containing 5 bytes of header information followed by 48 data bytes. Part of the B-ISDN standard.

ATM is a high-bandwidth low-delay switching and multiplexing technology. It is a data link layer protocol. This means that it is a protocol-independent transport mechanism. ATM allows integration of real-time voice and video as well as data. ATM allows very high speed data transfer rates at up to 155 Mbit/s.

A communications protocol defined for high-speed data communications.

Technology permitting sharing of transmission facilities between different data types i.e. video, voice or data.

A networking protocol initially designed to move multimedia data around with high reliability and speed. It uses small, fixed-size cells of data that can...

A virtual circuit based transport technology; supports circuits with QoS and reserved bandwidth.

A technology for broadband transmission of high-capacity telecommunications signals.

A high-bandwidth, low-delay, standard for digital backbone networks.

Asynchronous Transfer Mode is a low delay, broad-bandwidth, packet-like (cell relay) multiplexing and switching technique. Essentially it is connection oriented, although its evisioned to support all services. ATM networks either accept or reject connections dependent on a given user's average and peak bandwidth requirements. This provides both an efficient and flexible service for compressed video, LAN-to-LAN and other applications involving variable bit rate traffic.

(ATM) The technology selected by the Consultative Committee on International Telegraphy and Telephony (CCITT) to deliver broadband-ISDN services for the world-wide telecommunications network. It is fast, packet-sized technology based on a fixed packet (or cell) size.

(ATM): ATM is the name given to a network technology based on transferring data in cells or packets of a fixed size. The cell used with ATM is relatively small compared to units used with older technologies. The small, constant cell size allows ATM equipment to transmit video, audio, and computer data over the same network, while ensuring that no single type of data dominates the line.

A set of network protocols designed for multimedia transmission. Data is partitioned into cells (53 bytes each) and passed along a virtual circuit. ATM allows for building very high speed networks.

Dedicated-connection switching technology that organizes digital data into 53 -byte cell units and transmits them over a physical medium using digital signal technology. Individually, a cell is processed asynchronously relative to other related cells and is queued before being multiplexed over the transmission path.

A cell-based data transfer technique in which channel demand determines packet allocation. ATM offers fast packet technology, real-time, demand led switching for efficient use of network resources. It is also the generic term adopted by ANSI (American National Standards Institute) and the ITU-TS (International Telecommunication Union-Telecommunication Standardization Sector) to classify cell relay technology within the realm of broadband WANs, specifically B-ISDN. In ATM, units of data are not time related to each other and, as part of the B-ISDN standard, are specified for digital transmission speeds from 34Mbps to 622Mbps. IBM currently offers ATM at a non-standard 25Mbps format.

Communication technology that uses high-bandwidth, low-delay transport technology, and multiplexing techniques. Through dedicated media connections it provides simultaneous transport of voice, video, and data signals more than 50 times faster than current technology. May be used in phone and computer networks of the future.

a packet switching method based on fixed length packets called cells having a 5 byte header and a 48 byte payload, giving high bandwidths and low delays required for a multiservice network.

See ATM.

A very high speed fast-packet transmission protocol.  It is capable of interface speeds from 50 Mbps to 24 Gbps

A high-speed dedicated-connection switching technology that organizes digital data into 53-byte cell units to support multiple types of traffic. ATM is designed to be easily implemented by hardware (rather than software) to enable faster processing and switching speeds. ATM, specified in international standards, is asynchronous in the sense that cells carrying user data need not be periodic.

is a global industry standard for broadband communications that uses high-speed switching capabilities to carry two digital signals of varying bandwidth.

A method of data multiplexing that can provide large, instantaneous bandwidths for busy traffic while permitting slow traffic to use that bandwidth between bursts. Very short, fixed-length packets or cells are used to transmit information. Its basic cell is 53 bytes long.

Asynchronous Transfer Mode. International sandard for cell relay in which multiple service types (such as voice, video, or data) are conveyed in fixed-length (53-byte) cells. Fixed-length cells allow cell processing to occur in hardware, thereby reducing transit delays. ATM is designed to take advantage of high-speed transmission media such as E3, SONET, and T3.

The transfer mode in which the information is organized into cells. It is asynchronous in the sense that the recurrence of cells containing information from an individual user is not necessarily periodic. Or a protocol for the transmission of a variety of digital signals using uniform 53-byte cells.

(n.) A broadband cell relay protocol that cuts subscriber data into fixed size packets for transfer across the wide area network.

A high-speed connection-oriented protocol used to transport many different types of network traffic. ATM packages data in a 53-byte, fixed-length cell that can be switched quickly between logical connections on a network. See also: protocol

Asynchronous Transfer Mode (ATM) is a cell relay, Circuit switching network and data link layer protocol which encodes data traffic into small (53 bytes; 48 bytes of data and 5 bytes of header information) fixed-sized cells. This differs from other technologies based on packet-switched networks (such as the Internet Protocol or Ethernet), in which variable sized packets (sometimes known as frames) are used. ATM is a connection-oriented technology, in which a logical connection is established between the two endpoints before the actual data exchange begins.