What is ATM (Asynchronous Transfer Mode)? Definition
What does ATM stands for? The acronym ATM stands for Asynchronous Transfer Mode.
What is ATM? Definition: ATM is a switching and multiplexing high speed technology used for both LAN and WAN networks for carriage of a complete range of simultaneous traffic including voice, video and data. The key to this flexibility is an ATM Adaptation Layer (AAL) that maps multiple protocols and services used on the ATM layer.
ATM uses an asynchronous time-division multiplexing and encodes the data in small fixed-sized packets called cells. A cell is processed asynchronously relative to other related cells and is queued before being multiplexed over the transmission path.
Cells used with ATM are relatively small as compared to units used with older technologies.
ATM is expressed sometimes through levels OC (Optical Carrier), written as “OC-xxx.” The most common performance levels for ATM 155 Mbps (OC-3) and 622 Mbps (OC-12).
ATM protect the network and the end systems of the congestion, in order to provide a level of quality specified and guaranteed service (QoS)