| 摘要 |
PROBLEM TO BE SOLVED: To provide a communication apparatus for suppressing a transmission efficiency from being decreased by avoiding packets whose destination is not clear from being outputted to a slave unit among packet distributed to a terminal. SOLUTION: Address storage means 1ba, 1bb,... extract addresses of terminals 5a to 5d,..., 6a to 6d,... connected to slave units 3a, 3b,..., 4a, 4b,... from an uplink packet and registers the extracted addresses to address management tables 1ca, 1cb,... Address extract means 1da, 1db,... extract addresses of destination terminals included in a packet outputted from a layer 2 switch 1a. Address determination means 1ea, 1eb,... determine whether or not the address of the transmission destination terminal is registered in the address management tables 1ca, 1cb,... Packet output means 1fa, 1fb,... output a downlink packet to couplers 2a, 2b,... in accordance with a result of the judgment. COPYRIGHT: (C)2005,JPO&NCIPI
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