Optical PCM group transmission repeating system
First Claim
1. A light PCM group transmission repeating system for transmitting PCM information by means of a plurality of optical fiber groups each of which is composed of a plurality of optical fibers comprising:
- group repeaters provided for each optical fiber group, each group repeater having a plurality of individual means for regenerating the PCM information as transmitted through a plurality of said optical fibers, each group repeater having additional means commonly connected to said individual means for simultaneous control thereof;
each of said individual means for each group repeater including an individual opto-electric converter circuit, an amplifier, an equalizer and an electro-optic converter circuit for each of a plurality of said optical fibers, and said commonly connected additional means for simultaneous control of said individual means including at least one of the following circuits, an automatic gain control circuit, a light element control circuit, a power supply circuit, a timing circuit, and a supervisory circuit.
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Accused Products
Abstract
An optical fiber communication system using group transmission which transmits PCM information by utilizing an optical fiber group composed of a plurality of optical fibers. The PCM information in a plurality of optical fibers is stored in a memory of the system'"'"'s sending terminal, the stored information of each memory is read out by simultaneous clock pulses so as to send out the information to a transmission line which is composed of a plurality of said optical fibers. A repeater is provided in the transmission line having at least one of the following circuits, an AGC circuit, a light element control circuit, a power supply circuit and a supervisory circuit. The supervisory circuit is commonly provided for checking a plurality of signals which is transmitted by the above-mentioned optical fibers. In the repeater, the signals are regenerated by simultaneous clock pulses which are generated from one common timing circuit, and the phases of the signals are arranged in order for sending out said signals to the transmission line composed of said optical fibers.
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Citations
12 Claims
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1. A light PCM group transmission repeating system for transmitting PCM information by means of a plurality of optical fiber groups each of which is composed of a plurality of optical fibers comprising:
- group repeaters provided for each optical fiber group, each group repeater having a plurality of individual means for regenerating the PCM information as transmitted through a plurality of said optical fibers, each group repeater having additional means commonly connected to said individual means for simultaneous control thereof;
each of said individual means for each group repeater including an individual opto-electric converter circuit, an amplifier, an equalizer and an electro-optic converter circuit for each of a plurality of said optical fibers, and said commonly connected additional means for simultaneous control of said individual means including at least one of the following circuits, an automatic gain control circuit, a light element control circuit, a power supply circuit, a timing circuit, and a supervisory circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
- group repeaters provided for each optical fiber group, each group repeater having a plurality of individual means for regenerating the PCM information as transmitted through a plurality of said optical fibers, each group repeater having additional means commonly connected to said individual means for simultaneous control thereof;
Specification