Power line carrier multi telephone extension system for full duplex conferencing between telephones
First Claim
1. A System for signalling between stations on the power line in a building comprising,(a) a main station, denoted M, and one or more (up to N) satellite stations denoted E1, E2--En--EN.(b) a the M station:
- (b1) an M transmitter that transmits information signals as modulations of the carrier frequency Fm,(b2) N receivers, one for each of the satellite stations, each for receiving a corresponding one of the satellite carrier frequencies F1, F2,--Fn-FN, each receiver detecting the corresponding satellite station information signal modulations of the station carrier frequency Fn and producing an output, representative thereof,(b3) means for combining the outputs for said M receivers producing a combined receiver output signal, referred to herein as MRXN,(b4) means for coupling said MRXN to the input of the M transmitter, and(b5) means for coupling the inputs to the said N receivers and the output of the M transmitter to the power line in the building;
(b6) whereby all information signals from the N receivers are transmitted over the power line on the carrier Fm; and
(c) at each satellite station, En;
(c1) an En receiver for receiving Fm,(c2) an En transmitter for transmitting information signals as modulations of the station carrier frequency Fn,(c3) a source of En information signals,(c4) an En received signal utilization device,(c5) means for coupling the En source output to the En transmitter input,(c6) means for coupling the En receiver output to the En utilization device, and(c7) means for coupling the input of the En receiver and the output of the En transmitter to the power line in the building;
(d) whereby two or more of said satellite stations can communicate with each other simultaneously, full duplex.
6 Assignments
0 Petitions
Accused Products
Abstract
In a power line carrier telephone extension system for transmitting electrical signals between the telephone line and an extension telephone over the AC electric power line available at a telephone subscriber'"'"'s premises, that includes a main station for processing signals between the subscriber'"'"'s telephone line and power lines and an extension telephone of the system that plugs into the power line, means that provides for a plurality of such extension telephones all of which can place calls to the telephone line, answer calls from the telephone line and conference together in full duplex communication.
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Citations
33 Claims
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1. A System for signalling between stations on the power line in a building comprising,
(a) a main station, denoted M, and one or more (up to N) satellite stations denoted E1, E2--En--EN. (b) a the M station: -
(b1) an M transmitter that transmits information signals as modulations of the carrier frequency Fm, (b2) N receivers, one for each of the satellite stations, each for receiving a corresponding one of the satellite carrier frequencies F1, F2,--Fn-FN, each receiver detecting the corresponding satellite station information signal modulations of the station carrier frequency Fn and producing an output, representative thereof, (b3) means for combining the outputs for said M receivers producing a combined receiver output signal, referred to herein as MRXN, (b4) means for coupling said MRXN to the input of the M transmitter, and (b5) means for coupling the inputs to the said N receivers and the output of the M transmitter to the power line in the building; (b6) whereby all information signals from the N receivers are transmitted over the power line on the carrier Fm; and (c) at each satellite station, En; (c1) an En receiver for receiving Fm, (c2) an En transmitter for transmitting information signals as modulations of the station carrier frequency Fn, (c3) a source of En information signals, (c4) an En received signal utilization device, (c5) means for coupling the En source output to the En transmitter input, (c6) means for coupling the En receiver output to the En utilization device, and (c7) means for coupling the input of the En receiver and the output of the En transmitter to the power line in the building; (d) whereby two or more of said satellite stations can communicate with each other simultaneously, full duplex. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A power line RF carrier telephone extension system for signalling between (1) a telephone subscriber'"'"'s telephone line of a conventional telephone communication system wherein a separate telephone line is provided from a central switching system at one location to each subscriber at the subscriber'"'"'s premises and each subscriber'"'"'s telephone line includes at least two wires, the ring line and the tip line and, (2) each of one or more extension telephones by RF carrier over the available power line at the subscriber'"'"'s premises, including at the subscriber'"'"'s premises:
- a subscriber main station (M) near said subscriber telephone line and having access to said power line and one or more (up to N) subscriber extension stations (E1, E2 ---En--- EN), each having access to said power line, comprising,
(a) at the M station; (a1) means connected to the telephone line for detecting audio frequency signals on the telephone line, referred to herein as TL signals, (a2) an M transmitter including means for producing a main carrier frequency, Fm, and modulating means for modulating Fm, (a3) N receivers, one for each of the En stations, each receiver for receiving a different one of the En stations transmitted RF carrier frequencies, F1, F2 --Fn ---FN and including an Fn demodulator, and producing modulations of Fn in the output thereof, (a4) means for combining the outputs of said N receivers, producing a combined receiver output signal, referred to herein as MRXN, (a5) means for combining the detected TL and MRXN signals and, coupling the combined signals to the input of the transmitter, said transmitter input of the transmitter, said transmitter input being referred to herein as MTX, and (a6) means for coupling the transmitter output to the power line, whereby the power line carries the modulated Fm to the NE stations; and (b) at each E station, denoted generally as En; (b1) an En telephone, (b2) a source of power for the En telephone, whereby the En telephone produces audio and dial signals when it is used, (b3) an En receiver for modulated Fm including an Fm demodulator, and producing the modulations of Fm in the output thereof, referred to herein as EnRX, (b4) means for coupling modulated Fm from the power line to the input of the receiver and (b5) means for coupling said EnRX to the En telephone, whereby the En telephone receives the TL and MRXN signals, (b6) the extension telephone producing information signals, which may include audio and data signals, and dial signal and a telephone line hold signal when it is used by the subscriber, (b7) an En transmitter including means for producing the En telephone carrier frequency, Fn and modulating means for modulating Fn by the En telephone audio signals and signals representative of the En dial signals and hold signal producing modulated Fn and (b7) means for coupling the modulated Fn to the power line, whereby the power line carries the modulated Fn to the main station and telephone calls from the telephone line can be answered by any of the E1, E2 -- En---EN telephones and telephone calls can be made to the telephone line by any of the E1, E2 --En ---EN telephones and any or all of the E1, E2 --En telephones can conference on a telephone line call. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
- a subscriber main station (M) near said subscriber telephone line and having access to said power line and one or more (up to N) subscriber extension stations (E1, E2 ---En--- EN), each having access to said power line, comprising,
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27. A telephone extension system for signalling between (1) a telephone subscriber'"'"'s telephone line of a conventional telephone communication system wherein a separate telephone line is provided from a central switching system at one location to each subscriber at the subscriber'"'"'s premises and each subscriber'"'"'s telephone line includes at least two wires, the ring line and the tip line and, (2) each of one or more extension telephones by RF carrier over transmission line line at the subscriber'"'"'s premises, including at the subscriber'"'"'s premises:
- a subscriber main station (M) near said subscriber telephone line and having access to said transmission line and one or more (up to N) subscriber extension stations (E1, E2 ---En--- EN), each having access to said transmission line, comprising,
(a) at the M station; (a1) means connected to the telephone line for detecting audio frequency signals on the telephone line, referred to herein as TL signals, (a2) an M transmitter including means for producing a main carrier frequency, Fm, and modulating means for modulating Fm, (a3) N receivers, one for each of the En stations, each receiver for receiving a different one of the En stations transmitted RF carrier frequencies, F1, F2-- Fn---FN and including an Fn demodulator, and producing modulations of Fn in the output thereof, (a4) means for combining the outputs of said N receivers, producing a combined receiver output signal, referred to herein as MRXN, (a5) means for combining the detected TL and MRXN signals and, coupling the combined signals to the input of the transmitter, said transmitter input being referred to herein as MTX, and (a6) means for coupling the transmitter output to the transmission line, whereby the transmission line carries the modulated Fm to the NE stations; and (b) at each E station, denoted generally as En; (b1) an En telephone, (b2) a source of power for the En telephone, whereby the En telephone produces audio and dial signals when it is used, (b3) an En receiver for modulated Fm including an Fm demodulator, and producing the modulations of Fm in the output thereof, referred to herein as EnRX, (b4) means for coupling modulated Fm from the transmission line to the input of the receiver and (b5) means for coupling said EnRX to the En telephone, whereby the En telephone receives the TL and MRXN signals, (b6) the extension telephone producing information signals, which may include audio, dial and command signals when it is used by the subscriber, (b7) an En transmitter including means for producing the En telephone carrier frequency, Fn, and modulating means for modulating Fn by the En telephone audio signals and signals representative of the En dial signals producing modulated Fn and command (b7) means for coupling the modulated Fn to the transmission line, whereby the transmission line carries the modulated Fn to the main station and telephone calls from the telephone line can be answered by any of the E1, E2 -- En---EN telephones and any or all of the E1, E2 --En ---EN telephones can conference on a telephone line call. - View Dependent Claims (28, 29, 30)
- a subscriber main station (M) near said subscriber telephone line and having access to said transmission line and one or more (up to N) subscriber extension stations (E1, E2 ---En--- EN), each having access to said transmission line, comprising,
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31. A System as in claim in 27 wherein,
(a) the RF carrier modulation by the information signals that are analog (such as the audio) is frequency modulation, the RF carrier modulation by the binary bits is digitally modulated frequency shift keying, and (b) the percent modulation of the binary bits is greater than the percent modulation of the analog signal.
Specification