Transmission system for security installation, has analog-to-digital interface that converts analog signal to digital signal sent to alarm receiving center, and digital-to-analog interface that converts digital signal into analog signal

摘要

The transmission system has an electronic control unit (ECU) (1) with sensors (5) that detect different anomalies occurring in the security system. The ECU transmits an alarm signal to an alarm receiving center (ARC) (4) based on signal from sensors. An analog-to-digital interface (2) converts analog signal to digital signal that is sent via global system for mobile communications (GSM) to the ARC. A digital-to-analog interface (3) converts the digital signal into an analog signal.