Telephonic communications – Having light wave or ultrasonic link for speech or paging... – Including fiber optic link within telephone network
Patent
1993-08-02
1996-02-20
Kuntz, Curtis
Telephonic communications
Having light wave or ultrasonic link for speech or paging...
Including fiber optic link within telephone network
379 61, 379 95, 379100, H04Q 732
Patent
active
054936039
ABSTRACT:
In a radio telephone set for digital communication, tone sound is generated under a state where digital data is received. For this purpose, a tone generator is provided to make the tone sound. The tone generator is actuated when a received digital signal is for digital data communication.
REFERENCES:
patent: 4908851 (1990-03-01), Kotani et al.
patent: 5056132 (1991-10-01), Coleman et al.
patent: 5247566 (1993-09-01), Hiramatsu
patent: 5263078 (1993-11-01), Takahashi et al.
patent: 5282238 (1994-01-01), Berland
Cumming William
Kuntz Curtis
NEC Corporation
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