| 摘要 |
<p>PURPOSE:To simplify the address information of the packet and to execute rapidly the exchanging processing or the packet by giving a trunk line node number and a branch line node number and a line number between trunk line nodes as an address information, deciding the transfer destination by the address information and executing the packet transfer. CONSTITUTION:For the packet from the subscriber line or the transmission line, in a flag removing FCS chain circuit 31, a flag F is removed, the address is designated and reading is executed to a data bus 34. A hardware switch 35 stipulates the address of an FIFO buffer, outputs to an address bus 37 and outputs the data to a data bus 38 by a line number, a trunk line node number, a branch line node number and a terminal number in the transmission head TH of the packet. Thus, the designated FIFO buffer 39 reads the data from the data bus 38, adjusts the timing and outputs it, and a flag adding FCS adding circuit 40 adds the flag F and a frame checking sequence FCS and outputs to the subscriber line or the transmission line.</p> |
