Broad band network system
First Claim
1. A signal multiplex transmission system comprising:
- (a) plurality of terminal units including a plurality of first terminal units for processing information signals to generate first information signals which are multiplexed to be transmitted as first multiplexed information signals in a first frequency band and a plurality of second terminal units for processing information signals to generate second information signals which are multiplexed to be transmitted as second multiplexed information signals in a second frequency band;
(b) branch exchange means for allowing signal transmission between said first terminal units;
(c) signal separation means for receiving the first and second multiplexed information signals, for separating the first multiplexed information signals from the second multiplexed information signals, and for transmitting the first multiplexed information signals to said branch exchange means and outputting the second multiplexed information signals; and
mixer means, connected to said branch exchange means and said signal separation means, for receiving the first multiplexed information from said first terminal units through said branch exchange means and the second multiplexed information signals from said signal separation means, and for mixing the first and second multiplexed information signals to supply a composite signal to said first and second terminal units.
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Accused Products
Abstract
A signal multiplex transmission system has predetermined work stations included in a plurality of terminal units which respectively process data in predetermined forms, and a private branch exchange or PBX. A transmission line is connected between the predetermined work stations and the PBX to commonly transmit frequency-multiplexed data from the PBX to the predetermined work stations. A separation filter separates first multiplexed signals supplied from the predetermined work stations from second multiplexed signals from other work stations and supplies the separated first multiplexed signals to the PBX independently of the second multiplexed signals, which signals are amplified by an amplifier. A mixer is connected to the PBX, the amplifier and a reception line. The first and second multiplexed signals are mixed by the mixer, and composite data is sent onto the reception line. The signal lines are used to transmit the multiplexed signals having the same frequency band.
141 Citations
25 Claims
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1. A signal multiplex transmission system comprising:
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(a) plurality of terminal units including a plurality of first terminal units for processing information signals to generate first information signals which are multiplexed to be transmitted as first multiplexed information signals in a first frequency band and a plurality of second terminal units for processing information signals to generate second information signals which are multiplexed to be transmitted as second multiplexed information signals in a second frequency band; (b) branch exchange means for allowing signal transmission between said first terminal units; (c) signal separation means for receiving the first and second multiplexed information signals, for separating the first multiplexed information signals from the second multiplexed information signals, and for transmitting the first multiplexed information signals to said branch exchange means and outputting the second multiplexed information signals; and mixer means, connected to said branch exchange means and said signal separation means, for receiving the first multiplexed information from said first terminal units through said branch exchange means and the second multiplexed information signals from said signal separation means, and for mixing the first and second multiplexed information signals to supply a composite signal to said first and second terminal units. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification