The portion of the ATM Adaptation Layer that converts frames into cells (and cells into frames). Click here to view a diagram.
The protocol that divides packets into cells and combines cells into packets.
(1) In ATM, a sublayer (SAR) of AAL; a process performed on ATM information cells.(2) In APPN, a flow control operation that functions at SNA layer 4.
Segmentation and Reassembly refers to the process used to fragment and reassemble packets so as to allow them to be transported across Asynchronous Transfer Mode networks. Since ATM's payload is only 48 bytes, nearly every packet from any other protocol has to be processed in this way. Thus, it is an essential process for any ATM node.