Message communication system
First Claim
Patent Images
1. In an office complex, a message communication system comprising:
- means for generating an analog carrier signal,means for modulating said analog carrier signal with a digital message signal such that said digital message signal is phase coherent with said analog carrier signal, said digital message signal including information identifying a unique address or set of unique addresses of one or more of the plurality of remote locations,means for transmitting said message signal from a first central location over an office power line to a group of remote locations, andmessage display means each having one or more unique destination address means corresponding to said specified information and responsive to said transmitted message signal for displaying said message.
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Abstract
A message communication system which provides instant messages and memoranda at a telephone user'"'"'s desk. In an office complex, a message is transmitted over pre-existing office power lines to printers located in a user'"'"'s office and is automatically posted with time of day, date and sequence number. When a telephone call cannot be completed, messages are entered at the terminal by a telephone operator or message attendant. A computer automatically formats message forms and stores the text on a magnetic diskette. Messages are transmitted to outlying printers and can be recalled for display or resending at any time.
82 Citations
41 Claims
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1. In an office complex, a message communication system comprising:
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means for generating an analog carrier signal, means for modulating said analog carrier signal with a digital message signal such that said digital message signal is phase coherent with said analog carrier signal, said digital message signal including information identifying a unique address or set of unique addresses of one or more of the plurality of remote locations, means for transmitting said message signal from a first central location over an office power line to a group of remote locations, and message display means each having one or more unique destination address means corresponding to said specified information and responsive to said transmitted message signal for displaying said message.
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2. A message communication system comprising means for generating an analog carrier signal, means for modulating said analog carrier signal with a digital message signal such that said digital message signal is phase coherent with said analog carrier signal, said digital message signal including information identifying a unique address or set of unique addresses of one of a plurality of remote locations, means for transmitting said modulated carrier signal from a central location to a plurality of remote locations, each of said remote locations including a message receiver where one of said message receivers has one or more unique address means corresponding to said specified addresses, said message receivers each including means responsive to said modulated carrier signal for generating a digital data stream corresponding to said message, control means responsive to said data signal for generating drive control signals corresponding to said message, and means responsive to said drive control signals for displaying said message.
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3. In an office complex, a message communication system comprising
means for generating an analog carrier signal, means for modulating said analog carrier signal with a digital message signal such that said digital message signal is phase coherent with said analog carrier signal, said digital message signal including information identifying a unique address or set of unique addresses of one or more of the plurality of remote locations, means for transmitting said phase coherent message signal from a first central location over an office power line to a group of remote locations and message printer means located at each of said remote locations, each of said message printer means having one or more unique destination address means corresponding to said specified information and responsive to said transmitted phase coherent message signal for displaying said message.
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19. In an office complex, a message communication system comprising means for transmitting a message signal having specified information including information identifying a unique address or set of unique addresses of one of a plurality of remote locations from a first central location over an office power line to a group of remote locations, and message printer means located at each of the remote locations, each of said message printer means having one or more unique destination address means corresponding to said specified information and responsive to said transmitted message signal for displaying said message, said message printer means including a low Q input filter for filtering said transmitted message signal.
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21. In an office complex, a message communication system comprising
means for generating an analog carrier signal, means for modulating said analog carrier signal with a digital message signal such that said digital message signal is phase coherent with said analog carrier signal, said digital message signal including information identifying a unique address or set of unique addresses of one or more of the plurality of remote locations, means for transmitting a message signal having specified information including information identifying a unique address or set of unique addresses of one of a plurality of remote locations from a first central location over an office power line to a group of remote locations and message printer means located at each of said remote locations, said message printer means having one or more unique addresses corresponding to said specified information responsive to said transmitted message signal for displaying said message.
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22. In an office complex, a message receiver comprising
means connected to an office power line responsive to a message signal transmitted over said power line representing a message for generating a digital data stream corresponding to said message, control means responsive to said data signal for generating control signals corresponding to said message, means responsive to said control signal for displaying said message, said means for generating including a low Q input filter for filtering said transmitted message signal.
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23. In an office complex, a message receiver comprising filter means responsive to a transmitted modulated carrier signal representing a message where said message is phase coherent with said carrier signal for generating a digital data stream corresponding to said message, means for generating a frequency variable control signal, tone decoder means for comparing the phase of the receiver carrier signal with said variable control signal to obtain phase coherency corresponding to said transmitted phase coherency, means for checking said phase coherency for a predetermined period of time, control means responsive to said digital data stream for generating control signals corresponding to said message, and means responsive to said control signals for displaying said message.
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24. In an office complex, a message receiver comprising
means connected to an office power line responsive to a phase coherent message signal transmitted over said power line representing a message for generating a digital data stream corresponding to said message, control means responsive to said data signal for generating control signals corresponding to said message, and means responsive to said control signal for displaying said message.
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33. In an office complex, a message communication system comprising
memory means, operator controllable key word terminal means located at a central location in said complex for entering one or more operator controllable message signals each having specified information including information identifying a unique address or set of unique addresses of one of a plurality of remote locations into said memory means, means for generating and transmitting specified ones of said message signals from said central location over an office power line to a group of remote locations, said means for generating including means for generating an analog carrier signal, means for modulating said analog carrier signal with a digital message signal such that said digital message signal is phase coherent with said analog carrier signal, message display means having one or more unique address means corresponding to the specified information in a specified one of the transmitted message signals, and control means for controlling the operation of said system.
Specification