Class C ATM traffic

In ITU-T standards for asynchronous transfer mode (ATM), a class of traffic supported by ATM Adaptation Layer 3/4 (AAL3/4). Such traffic is connection-oriented variable bit rate (VBR) traffic with no timing relationship between the source and the sink. Examples of Class C traffic include X.25 and frame relay. See also AAL, AAL3/4, ATM, connection-oriented, frame relay, ITU-T, sink, source, VBR, and X.25.