Telephonic communications – Having light wave or ultrasonic link for speech or paging... – Including fiber optic link within telephone network
Patent
1988-01-07
1989-04-25
Lev, Robert
Telephonic communications
Having light wave or ultrasonic link for speech or paging...
Including fiber optic link within telephone network
379 63, H01Q 700
Patent
active
048254568
ABSTRACT:
An apparatus for interfacing a telephone system having a central processor and a plurality of telephone extension lines operatively connected to the central processor to at least one pager transmitter. For each pager transmitter there is an interface circuit which is connected to one of the telephone extension lines and to one of the pager transmitters. The interface circuit includes a ring signal detector to detect activation of the telephone extension line connected thereto and for providing an output indicative of the activation. The interface circuit further includes a pager transmitter activator responsive to the output of the detector means for activating one of the pager transmitters.
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