Cash flow monitoring system

摘要: A computerized monitoring system which incorporates the power lines that provide electrical to remote devices as physical communications medium of a serial data bus for computer system. The comprises central and plurality sensor modules within individual devices. each has associated with it respective link coupling signal generating receiving means distribution manipulating signals from form suitable transmission on lines. Phase shift keying is used wherein binary bits are represented 180° phase shifts pulses in carrier pulse train. rate approximately 15,000 baud frequency 120 kHz typical. polling includes preamble pure frequency, followed by number device being polled, (or instructions) defining message content. Each its own clock train at very close common bringing into predetermined relationship appearing