Patent ID: 6560221
Filing Date: 2003-05-06
Classification: H04B,H04L,H04N

Abstract:
A communication path control device for controlling communication paths between a first network and a second network comprising:a first interface section for connecting to said first network, wherein said first network is a local area network; a second interface section for connecting to a first communication path for two-way data transfer with said second network, wherein said second network includes an internet; a third interface section for connecting to a second communication path having a transmission capacity larger than said first communication path for one-way data transmission from said second network to said first network; and control means for selecting one of said first communication path and said second communication path as a return path for reply data responsive to an internet protocol packet transmitted from said first network to said second network through said first communication path, wherein data transferred from said second network through said second communication path is data generated by multiplexing a plurality of data addressed to a plurality of destinations, and said control means selects data to be received with reference to a destination address in a packet of multiplexed data.