| 摘要 |
A redundant security system relies on a Radio Frequency Identification (RFID) tag to convey security sensor data. If the RFID tag is unable to convey security sensor data, a backup photoelectric cell powered transmitter is activated to transmit security sensor data to a monitoring station. Alternately, a security safe is outfitted with a RFID tag based security sensor. The RFID tag allows remote monitoring of at least one of an opened/closed condition and a locked/unlocked condition of a door of the security safe.
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