JPH0220932A - Line switching and connecting system - Google Patents

Abstract

PURPOSE:To decrease the number of stand-by lines which become necessary by constructing an alternate line of a line terminal having priority of a high level which has become a fault by using a part or all of existing lines of a line terminal having priority of a low level. CONSTITUTION:When an existing line 11 has become a fault, a control signal is sent to each line switching part 2, 3 and 4 through control signal lines 5, 6 and 7 from a line switching control part 1, a line terminal 21 is detached from the existing line 11 and connected to an existing line 12 by a line switching and connecting part 2, and the existing line 12 and an existing line 13 are connected by the line switching and connecting part 3. In the line switching and connecting part 4, the existing line 13 and the line terminal 21 are connected, and by constructing an alternate line of the existing line 11 which has become a fault by using the existing lines 12, 13, communication of the line terminal 21 is restored. In such a way, the constitution of the alternate line is allowed to have a redundancy, and the line can be switched and connected quickly and, as occasion may demand, in accordance with a state.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a line switching connection system, and in particular to a line switching connection system in which priority is given to line terminals and the line switching connection unit is centrally managed by a line switching control unit. This invention relates to a line switching connection system that enables communication to be restored on an ad hoc basis depending on the state of the failure when the working line of a line terminal with a high priority level becomes a failure.

Conventional technology This type of line switching system has traditionally installed a number of backup lines equivalent to the number of working lines, and when the working line cannot be used due to a failure or maintenance, communication is maintained by switching to and connecting to the protection line. Restoration Method % Formula % Problems to be Solved by the Invention The conventional line switching connection method described above installs a number of protection lines equivalent to the number of working lines and performs switching connection, so the number of lines required is This method has the drawback that the line usage efficiency deteriorates as the line becomes large, and the switch connection is fixedly performed between the working line and the protection line, so it is not possible to take flexible measures depending on the situation.

The present invention has been made in view of the above-mentioned conventional situation,
Accordingly, an object of the present invention is to provide a new line switching connection system that makes it possible to eliminate the above-mentioned drawbacks inherent in the conventional technology.

Means for Solving the Problems In order to achieve the above object, the line switching connection system according to the present invention prioritizes line terminals, and when the working line of a line terminal with a higher priority becomes a failure. means for constructing a detour line for a faulty line using part or all of the working lines of one or more line terminals that have a lower priority, and a line switching centering on a line switching connection part. and means for centrally managing the control unit.

Embodiment Next, a preferred embodiment of the present invention will be specifically explained with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention.

Referring to FIG. 1, reference number 1 is a line switching control unit;
, 3.4 are line switching connection parts, and 5 and 6.7 are control signal lines, respectively. When the working line 11 becomes a failure,
A control signal is sent from the line switching control unit 1 to each line switching unit 2, 3.4 via control signal lines 5, 6.7, and the line terminal 21 is disconnected from the working line 11 at the line switching connection unit 2 and used The line switching connection section 4 connects the working line 12 and the working line 13 to the working line 12, and connects the working line 12 and the working line 13 to the working line 12 and 13.
The communication of the line terminal 21 is restored by constructing a detour line for the failed working line 11 using .

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, as described in detail, a failed line terminal having a higher priority level can be bypassed by using part or all of the working line of a line terminal having a lower priority level. By constructing a line and centrally managing the line switching connection unit by the line switching control unit, it is possible to reduce the number of backup lines required and increase the efficiency of line usage. In addition, by providing redundancy to the configuration of the detour line, it is possible to quickly and flexibly switch connections depending on the situation.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, and the priority order of working lines 11 to 13 is 11>12>13. 1800 line disconnection line switching connection, 3,4. ,, line switching connection section, 5, 6, 7. ,,control signal lines, 11-13. . Current line, 21-23. ,, line terminal

Claims (1)

[Claims] By setting priorities for line terminals, if the working line of a line terminal with a higher priority becomes a failure, the line switching connection unit is centrally controlled by the line switching control unit,
Line switching characterized by using part or all of the working lines of one or more line terminals with lower priorities to restore communication of a faulty line terminal with higher priorities. Connection method.