Continuous radio announcer

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

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379 88, 379101, H04M 1108

Patent

active

049612158

ABSTRACT:
A continuous radio announcer device capable of transmitting a stored sound message in digitized format at predetermined time intervals. The radio announcer device includes a central unit and a remote unit that can be remotely accessed and the sound messages are stored in memory. The remote unit is a stand along device that can also be programmed on site. If remotely accessible, a modem and associated coded signals need to be provided to effect the communication over the public telephone network or through a wireless transmission. The amount of stored information will depend on the size of the memory.

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Mitel, (Application Notes), Integrated DTMF Transceiver, Jan. 1988, pp. 3-157, through 3-172.
High Speed Optocouplers, Hewlett Packard, (Application Notes), Aug. 1983.
Video Optocoupler HCPL-4562, Hewlett Packard, (Application Notes), May 1988, pp. 1-6.

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