| 摘要 |
PROBLEM TO BE SOLVED: To provide a power line communications apparatus connected to a network and a power line communications apparatus connected to equipment which acquire the frequency used by peripheral wireless stations, on the basis of their positional information for calculating the notch frequency and to reduce the output of the notch frequency. SOLUTION: A notch frequency setting system is constituted of: a master PLC modem 3 connected to a LAN 5; an external network; a broadband router 6; a customer information management database 10 for storing address information of the router 6 and a global IP address; a PLC information management server 11; and a wireless station information management database 14, a notch-setting circuit 37 of the master PLC modem 3 acquires the global IP address and transmits it to the PLC information management server 11, and the PLC information management server 11 acquires the address information from the customer information management database 10, acquires frequency information of a wireless station from the wireless station information management database 14, on the basis of the acquired address information to calculate notch frequency information, and transmits the notch frequency information to the master PLC modem 3 and sets therein the notch frequency. COPYRIGHT: (C)2006,JPO&NCIPI
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