| 摘要 |
A switch executes complex protocol processing on control cells easily at a high speed, and flexibly copes with new or modified specifications and standards which may be established in a future in relation with processing on RM and OAM cells, in the same manner as the flow of processing of normal cells. Each link interface portion 1 includes an input cell processing portion 7 and an output cell processing portion 8 provided at the input side and output side of a cell exchange portion 2, and cooperates with a control information maintenance portion 9 to execute application of switching information that the cell exchange portion 2 requires in input cells, and rewriting of ATM cell headers of input cells to and output cells from the cell exchange portion 2. The input cell processing portion 7 and the output cell processing portion 8 each include a fixed sequencer and a microcode sequencer to execute complex protocol processing such as OAM, RM and other control functions in the microcode sequencer. <IMAGE> |
