| 摘要 |
A portable remote device (11) includes a far call transmitter which may be part of a transceiver (24) responding to a beacon (33), or may be a transmitter (24a) responding to a switch (39), or both, so as to provide any or all of: panic alarms, calls for elevator service, authentication, access to vehicles, or access to buildings, garages or other spaces. The device (11) also has a RFID portion (13) which, when near the elevator, vehicle, garage or other space, responds to a beacon (37) utilizing power provided by the beacon in a conventional fashion, whereby to assure access even though a battery (26) of a transceiver (24) or a transmitter (24a) may have failed. Instead of a battery (26), the transceiver (24) or the transmitter (24a) may instead be powered by a stored energy section (20a) of the RFID portion (13) of the device (11), or by a microgenerator (26b), thereby eliminating the need for a battery. The far transceiver or transmitter may be automatically turned off after use, and turned on by the RFID in response to a beacon.
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