Video and data distribution module with subscriber terminal
AssigneeThe Manitoba Telephone System
InventorsIrving Gimple, William Rodman
Life of this patent
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Abstract
A subscriber data distribution system comprising first means for translating data received from a transmission line and transmitting the data to a subscriber terminal via a subscriber drop, second means for translating data received from a subscriber terminal and transmitting the data to the transmission line, the first and second means including means for isolating the transmission line from the subscriber terminal, and for regenerating the data transmitted both to and from the subscriber terminal.
Claims27
A subscriber communication terminal comprising:
- (a) a modem for receiving incoming data signals from an incoming carrier having a first frequency, for deriving a bit clock signal from the incoming carrier, for generating an outgoing carrier from the incoming carrier and for transmitting outgoing data signals on the outgoing carrier,
- (b) the incoming data signals being in the form of frames of data bits, each frame being divided into channels of a predetermined number of bits and ending with an extra frame bit, the frame bits form a predetermined pattern, control signals being contained in a predetermined channel,
- (c) a first shift register connected in a circuit with the modem for receiving the data signals,
- (d) means for enabling the shift register during the time of the predetermined channel whereby the control signals are read into and stored in the shift register during the time of the predetermined channel,
- (e) a bus system for receiving the control signals from the shift register,
- (f) means for receiving the bit clock signal and for generating frame and channel count timing signals therefrom,
- (g) a second shift register connected to the bus system for receiving outgoing data signals,
- (h) a circuit including a switch for carrying the outgoing data signals to the modem for modulation on the outgoing carrier,
- (i) a time slot generator adapted to receive the timing signals for generating control signals for said switch and for the second shift register, for controlling the time of application of said outgoing data signals in a predetermined outgoing channel,
- (j) port means connected to the bus system for connecting to at least one of data generating and receiving apparatus, and
- (k) a microprocessor connected to the bus system for receiving the incoming data signals, generating control signals, reading signals from the port means and writing signals to the port means, and generating said outgoing data signals.
A digital data transmission system comprising a central station including means for transmitting and receiving digital data signals in a format having a series of frames each having a plurality of time slots and each time slot having a plurality of bits, a plurality of remote subscriber terminal units each including means for transmitting and receiving digital data signals in said format, a plurality of remote receiving stations, each receiving station having connected thereto a plurality of said subscriber terminal units, and tree-type transmission means interconnecting said central station with each of said receiving stations, each receiving station including means for receiving digital data signals in said format from said central station and from said subscriber terminal units connected thereto and for regenerating from said received data signals new data signals in said format and means for transmitting said new data signals to said subscriber terminal units and to said central station respectively.
Dependencies are inferred from the claim text.