| 摘要 |
An ATM switching system concentrates cell streams, which are output by respective ones of a plurality of line interfaces (111 ... 11n), by a concentrator (31), enters a resulting cell stream into an ATM switch unit (13), deconcentrates cells, which have been switched by the ATM switch unit (13), by a deconcentrator (32) on a per line interface basis and sends the cells to lines. Each line interface converts a VPI/VCI included in the header of a cell that has entered from a line to an internal cell address having a number of bits smaller than the number of bits of the VPI/VCI. Each unit in the ATM switching system performs management of various data and controls cell switching based upon a converted cell address without relying upon the VPI/VCI. The line interface restores an internal cell address, which is included in the header of a cell that enters from the side of the ATM switch, to the VPI/VCI and sends the cell to a line. <IMAGE> |
