| 摘要 |
A combination cordless telephone and premise-monitoring alarm system has a base unit, a cordless handset, and one or more remote alarm detectors. The alarm detectors can be generally either smoke detectors, motion detectors, or open-entry detectors. The base unit includes at least one interface for the public telephone network, and another interface for radio communication with the cordless handset. The base unit preferably also communicates with the remote alarm sensors across the same radio interface. The base unit includes telephone call circuitry to relay telephone calls between the public telephone network and the handset. The base unit also includes alarm processing circuitry to send an alarm warning to a central alarm-monitoring station in response to an alarm signal from a remote detector. The base unit has control circuitry that is configured such that if, during a telephone call, the base unit is given an alarm signal, the base unit will either (i) hang up the telephone call and call up the central alarm-monitoring station to give warning, or (ii) call up the central alarm-monitoring station on a second telephone line (if available).
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