Multifunction telephone with message information and control inf

Details Multifunction telephone with message information and control inf Multifunction telephone with message information and control inf

1980-02-11

1982-03-30

Brigance, Gerald L.

179 99M, 179 18AD, H04Q 518

Patent

active

043225810

ABSTRACT:
A private telephone network that includes multifunction telephones. Multifunction telephones are connected to common equipment by a voice signal path and a data signal path. Supervisory information passes over the data signal path in the form of polled messages that are sent from the common equipment to the telephone. Sense information is received by the common equipment from the telephone. The transmission is by frequency modulation, such as frequency-shift-keying modulation, techniques. At the multifunction telephone, a programmed microcomputer contains three blocks of instructions for enabling the microcomputer to perform background operations, to respond to the initial receipt of a message, and to thereafter transmit and decode the message. Further, in response to the decoding block of instructions, that are provided on a fixed time basis, the microcomputer is able to transmit frequency-shift-keyed signals without the need for a separate frequency-shift-keyed transmitter.

REFERENCES:
patent: 3973085 (1976-08-01), Shiff
patent: 4061887 (1977-12-01), Kasson et al.
patent: 4125749 (1978-11-01), Kinoshita et al.
patent: 4160131 (1979-07-01), Kaul et al.
patent: 4203011 (1980-05-01), Coviello
patent: 4211895 (1980-07-01), Davis et al.
"ITT Electronic Key Telephones", F-482-1 (1-77) 2M Issue 1, Jan., 1977.
"Electronic Key Telephone", Soles Bulletin ITT Telecommunications Apparatus Dept. vol. No. III, Issue No. 23 11-30-77.
"Novakey Data Controlled Key System", Electrical Communication, vol. 52, No. 4, 1977, Howett and Sarby.

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