Asynchronous Transfer Mode (ATM) is the cell relay standard set by the CCITT organization. ATM uses a cell of 53 bytes.
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A data transmission technology based on transmitting data in relatively small, fixed-size packets or cells. Each cell contains only basic path information that allows switching devices to route the cell quickly. Cell relay systems can reliably carry live video and audio because cells of fixed size arrive in a more predictable way than systems with packets or frames of varying size.
