LOCAL AREA COMMUNICATION SYSTEM USING MASTER ANTENNA NETWORK

摘要

PURPOSE: A local area communication system using a master antenna network is provided to offer an Internet service and additional services using the master antenna network in which lines are installed in a structure work. CONSTITUTION: A dedicated line modem(12) controls signals inputted and outputted through a dedicated line(11), modules a downward signal on a LAN(Local Area Network), demodulates an upward signal one the LAN transmitted through a terminal modem(15), and transmits the demodulated signal to a server(10). The first signal noise filter unit(13) removes a signal noise which exists in the upward and downward signals between a master antenna network(20) and the server(10). The terminal modem(15) modulates interface data about a terminal(30), a response about the control of the dedicated line modem(12), and itself diagnosis data, and demodulates a downward signal such as control data of the dedicated line modem(12) and web data. The second signal noise filter unit(14) removes a signal noise which exists in the upward and downward signals between the terminal(30) and the master antenna network(20). An Internet service is started to the terminal(30) by constructing the LAN using the master antenna network(20).