Extended range paging for a radio frequency communication system

Telephonic communications – Having light wave or ultrasonic link for speech or paging... – Including fiber optic link within telephone network

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379 58, 379 60, 379 61, 455 331, 455 342, H04M 1100, H04Q 700

Patent

active

053634268

ABSTRACT:
A method of determining when a communication device (11) is out-of-range of an incoming call from a central station (25), disallows communication between them for the out-of-range condition. In the central station (25), a page signal is transmitted (20) representing a call to the communication device (11). The central station (25) is capable of receiving (12) signals transmitted by the communication device (11). Recognizing (40) a lack of response by the communication device to the page signal from the central station, the central station withholds the transmission of a call set-up grant signal. Meanwhile, in the communication device, signals transmitted by the central station are received (50). The communication device transmits a page-response signal (555) representing the reception of the page signal. Recognizing an absence of a call set-up grant signal (562), the communication device indicates (563) to the subscriber that the communication device is out-of-range of the coverage area of the central station for the call.

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