Asynchronous Transfer Mode (ATM)

Asynchronous Transfer Mode (ATM)Arjan DurresiDepartment of Computer Science,Louisiana State University,Baton Rouge, LA 70803 Email: JainDepartment of Computer Science and Engineering,Washington University in St. Louis,St. Louis, MO 63130 Email: Transfer mode (ATM) is a cell-oriented switching and multiplexingtechnology that uses fixed-length (53 byte; 48 bytes of data, and 5 bytes of headerinformation) packets called cells to carry various typesof traffic, such as data,voice, video, multimedia, and so on, through multiple classes of services. ATM is a1connection-oriented technology, in which a connection is established between the twoendpoints before the actual data exchange provides a highly complex technology, with features intended for applicationsranging from global telco networks to private local area computer networks. ATM hasbeen a partial success as a technology, with widespread deployment, but generally onlyused as a transport for IP traffic; its goal of providing a single integrated end-to-endtechnology for LANs, public networks, and user services haslargely failed.

cation from higher layers is adapted to the lower ATM defined layers, which in turn pass the information onto the physical layer for transmission over a selected physical medium. The protocol reference model is divided into three layers: the ATM adaptation layer (AAL), the ATM layer, and the physical layer, as shown in Figure 1 [4].

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