Supervisory system in communication system
First Claim
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1. A supervisory system in a communication system, comprising:
- first and second repeater stations, first, second and third terminal stations, and transmission lines, the repeater stations and the terminal stations being fixedly connected in tandem through the transmission lines;
each of the first and second repeater stations and the first, second and third terminal stations including transmission line supervisory equipment, each repeater station including a slave station, the first and second terminal stations including master stations and the third terminal station including a central master station, the first and second terminal stations each including a slave station;
each slave station being located between at least two master stations and being polled therefrom and transmitting supervisory information to both of the at least two master stations;
said central master station polling each of said master stations, and each master station collecting and transmitting the supervisory information to said central master station;
each of the master stations and the central master station having connected thereto a slave station which is connected to one of the first and second repeater stations; and
the master stations and the central master station polling said slave stations and collecting said supervisory information.
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Abstract
In a communication system wherein repeater stations and terminal stations are connected in tandem, a supervisory system in which a logical hierarchical configuration is used for the transmission of supervisory information regarding the stations and a redundant polling is used to easily and securely collect the supervisory information from the slave or repeater stations or the like. Whereby, if faults occur in some of the stations, the collection of the information is carried out without interruption and without the need to install a special information collecting line.
40 Citations
16 Claims
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1. A supervisory system in a communication system, comprising:
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first and second repeater stations, first, second and third terminal stations, and transmission lines, the repeater stations and the terminal stations being fixedly connected in tandem through the transmission lines; each of the first and second repeater stations and the first, second and third terminal stations including transmission line supervisory equipment, each repeater station including a slave station, the first and second terminal stations including master stations and the third terminal station including a central master station, the first and second terminal stations each including a slave station; each slave station being located between at least two master stations and being polled therefrom and transmitting supervisory information to both of the at least two master stations; said central master station polling each of said master stations, and each master station collecting and transmitting the supervisory information to said central master station; each of the master stations and the central master station having connected thereto a slave station which is connected to one of the first and second repeater stations; and the master stations and the central master station polling said slave stations and collecting said supervisory information. - View Dependent Claims (2, 3, 4, 5)
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6. A supervisory system, comprising:
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a first slave station collecting and transmitting first slave supervisory information; at least first and second master stations fixedly connected to said first slave station, each of said first and second master stations collecting the first slave supervisory information from said first slave station by polling; and a single central master station fixedly connected to said first and second master stations and collecting the slave supervisory information and master supervisory information from said first and second master stations. - View Dependent Claims (7)
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8. A supervisory system in a communication system, comprising:
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a first group of repeater stations connected in series each repeater station producing respective repeater supervisory information and having first and second ends; a second group of repeater stations connected in series, each repeater station producing repsective repeater supervisory information and having first and second ends; a first terminal station connected to said first group of repeater stations at the first end thereof, capable of communicating with said first group of repeater stations to produce first group supervisory and terminal information; a second terminal station connected to said first group of repeater stations at the second end thereof, connected to said second group of repeater stations at the first end thereof, capable of communicating with said first group of repeater stations to produce the first group supervisory and terminal information and capable of communicating with said second group of repeater stations to produce second group supervisory and terminal information; and a third terminal station connected to said second group of repeater stations at the second end thereof, capable of communicating with said second group of repeater stations to produce the second group supervisory and terminal information, producing system supervisory information from the first and second group supervisory and terminal information. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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Specification