Telephonic communications – Multi-line or key substation system with selective switching...
Patent
1994-12-20
1997-12-16
Kuntz, Curtis
Telephonic communications
Multi-line or key substation system with selective switching...
379164, 379177, 379373, 379376, 379251, 379252, H04M 100, H04M 160, H04M 300
Patent
active
056994192
ABSTRACT:
A keyset that connects to telephone switches via analog lines, wherein a processor in the keyset communicates with the switch via in-band signaling to provide keyset functionary. When a call comes into the switch for one of the directory numbers (DNs) associated with the keyset, the switch sends a frequency shift key (FSK) encoded message to all of the keysets associated with that DN. The FSK message includes at least the DN of the terminating telephone line, and may also include an extension number or other code. The processor in the keysets receives the message, decodes it, and then alerts the users of the incoming call.
REFERENCES:
patent: Re31789 (1985-01-01), Hashimoto
patent: 4582956 (1986-04-01), Doughty
patent: 4672660 (1987-06-01), Curtin
patent: 4720848 (1988-01-01), Akiyama
patent: 4763191 (1988-08-01), Gordon et al.
patent: 4763353 (1988-08-01), Canale
patent: 4776005 (1988-10-01), Petriccione
patent: 4788682 (1988-11-01), Vij
patent: 4873716 (1989-10-01), Brady
patent: 4873717 (1989-10-01), Davidson
patent: 4893336 (1990-01-01), Wuthnow
patent: 4905274 (1990-02-01), Cooper
patent: 4907259 (1990-03-01), Frech
patent: 4942598 (1990-07-01), Davis
patent: 4985913 (1991-01-01), Shalom et al.
patent: 4998273 (1991-03-01), Nichols
patent: 5029202 (1991-07-01), Doernbach
patent: 5040209 (1991-08-01), Greenberg
patent: 5097528 (1992-03-01), Gursahaney
patent: 5144653 (1992-09-01), Masuoka
patent: 5263084 (1993-11-01), Chaput
patent: 5265145 (1993-11-01), Lim
patent: 5544235 (1996-08-01), Ardon
"Facilities for Users of SOPHO-SET Feature Phones", PTR Philips Telecommunication and Data Systems Review, 48(1990) Mar., No. 1, Hilversum, NL, pp. 20-27.
"Digital Answering System Speakerphone 1545"--Owner's Manual 503-501-029--AT&T 1992.
Johannesen Michael B.
Kuntz Curtis
Lucent Technologies - Inc.
Shankar Vijay
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