Patent ID: 6980553

Claim:
A packet switching device, which is connected to a plurality of communication nodes, comprising: a line-corresponding unit for transforming first communication signals from a plurality of lines, respectively, into a plurality of second communication signals, which include destination address information of the first communication signals, and multiplexing said plurality of second communication signals to be output; a switch, provided with a plurality of input ports and output ports, for receiving said second communication signals output from said line-corresponding unit by any one of said plurality of input ports, and switching and outputting said second communication signals to any one of said plurality of output ports in accordance with said destination address information held by said second communication signals; and a controller for determining, based on said second communication signals received at said switch, said destination address information of said first communication signals, which are transmitted from said plurality of lines, wherein after said controller determines said destination address information of said first communication signals, which are transmitted from said plurality of lines, said controller transmits said destination address information to said line-corresponding unit.