cell relay function (CRF)
The Cell Relay Function (CRF) is a basic function that executes an ATM network and thus provides a cell relay service, i.e. a cell-oriented service, for the ATM end station. For this purpose, the ATM Adaption Layer ( AAL) provides a convergence function for the ATM layer, which is intended to appear to the higher layers in the same way as the underlying Cell Relay Function (CRF).