ASYNCHRONOUS TRANSFER MODE LAYER SIDE INTERFACE APPARATUS, PHYSICAL LAYER SIDE INTERFACE APPARATUS AND CELL PROCESSING METHOD AS WELL AS ASYNCHRONOUS TRANSFER MODE COMMUNICATION APPARATUS

摘要

The invention provides an improved ATM technique which can achieve common processing without depending upon the level or the mode of a cell used by the physical layer side, the bit width in the same mode, the parity adding method depending upon the level or the operation mode and the ATM layer side can cope individually with all modes where all cell information such as a level, a mode, presence or absence of a UDF, a bit width and a parity adding method is recognized in advance. An ATM communication apparatus includes a physical layer side interface apparatus which in turn includes a FIFO processing section and a UTOPIA interface section, and an ATM layer side interface apparatus which in turn includes a detection circuit, a UTOPIA circuit, and a selector.