Radio pager system which transmits secret coded messages from a

Details Radio pager system which transmits secret coded messages from a Radio pager system which transmits secret coded messages from a

1991-02-04

1993-10-26

Ng, Jin F.

Telephonic communications

Having light wave or ultrasonic link for speech or paging...

Including fiber optic link within telephone network

34082544, H04M 1100

Patent

active

052573079

ABSTRACT:
A radio pager system and pager terminal apparatus used in the system are disclosed. A pager signal to be transmitted includes destination information and message specifying information for specifying a message to be transmitted. The pager terminal apparatus includes a receiver for receiving an incoming pager signal, a detector for detecting that the received pager signal is a signal destined for the pager terminal apparatus, an extracting circuit for extracting message specifying information from the pager signal transmitted to the pager terminal apparatus and message displaying apparatus responsive to the extracted message specifying information for displaying a message corresponding to the extracted message specifying information in a visually recognizable manner. The radio pager system includes the above pager terminal apparatus, a station for transmitting via radio a pager signal, and transmission terminal apparatus for supplying the destination information and the message information to the station. The data to be transmitted is not the body of the message but message specifying information, so that the amount of data to be transmitted is reduced and the communication is kept secret.

REFERENCES:
patent: Re32365 (1987-03-01), Sebestyen
patent: 4336524 (1982-06-01), Levine
patent: 4490579 (1984-12-01), Godoshian
patent: 4994797 (1991-02-01), Breeden
patent: 5049874 (1991-09-01), Ishida et al.
patent: 5066949 (1991-11-01), Breeden et al.
Electronics International, Paging System Broadcasts Nationwide on FM Radio Channel, Jan. 1979, p. 68.
"NTT Paging System" by Masahiro Wada, May 1, 1989 NTT Review pp. 45-53.

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