JPH04132354A - Fault notification system for remote station - Google Patents

Abstract

PURPOSE:To improve reliability by transmitting the fault of a remote station from a line terminating equipment through a channel device with a digital line different from the line being the fault, and inputting the fault through the channel device to the line terminating equipment which houses the digital line being the fault at a host station side. CONSTITUTION:The switchboard of the remote station is equipped with a controller 6, a first channel device 5, first and second line terminating equipments 3 and 1, and a fault communicating device 36. The switchboard of a host station is equipped with a central controller 8, second channel device 7, third and fourth line terminating equipments 4 and 2, and fault supervising device 46. Then, faulty information from the remote station is inputted through the fault communicating device 36, line terminating equipment 3, channel device 5, line terminating equipment 1, line terminating equipment 2, channel device 7 to the device 46 from an inserter/dropper circuit 42 of the line terminating equipment 4. Thus, a maintainability and operability can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a failure notification system, and more particularly to failure notification of failure information of a remote station exchange to a host station.

[Conventional technology]

Conventionally, this type of fault notification method involves inserting fault information from the remote station into a specific channel of the digital line connected to the host station at the line termination device, without going through the communication line equipment, and transmitting it to the host side. However, on the host side, there is a method in which a line termination device extracts the fault information channel and inputs it to a fault monitoring device.

[Problem to be solved by the invention]

In the conventional fault notification method described above, if a fault occurs in the digital line that sends the fault information of the remote station to the host side, there is no way to send the fault information of the remote station to the host side using another digital line. The host side cannot obtain fault information of the remote station until the fault in the line is repaired, which poses a problem in maintenance and operation.

[Means to solve the problem]

The fault notification method of the present invention is a fault notification method for notifying a host station of fault information in a remote station of a switching system consisting of a host station and a remote station connected via a digital line. first and second line termination devices accommodating each of the lines;
and a first channel device accommodating a second line terminating device, and a fault notification device that collects fault information and sends it to the first line terminating device;
a third and fourth line terminating device accommodating each of the digital lines, a second call path device accommodating the third and fourth line terminating devices, and a third line terminating device extracted from the third line terminating device. The host station is equipped with a fault monitoring device that monitors the fault information received by the host station, and the fault information entered into the first line terminating device of the remote station is normally inserted into a specific channel on the first digital line. The third line terminating device sends fault information extracted from a specific channel on the first digital line to the fault monitoring device, and the third line terminating device sends fault information extracted from a specific channel on the first digital line to the fault monitoring device. In the case of a fault in the digital line, the fault information channel input to the first line termination device of the remote station is connected to the first call path device, and from the first call path device to the second call path device. The fourth line terminating device of the host station sends the received fault information to the host station via the line terminating device and the second digital line, and the fourth line terminating device of the host station transmits the received fault information to the second channel device. The fault information is sent to a third line terminating device, and the third line terminating device extracts fault information from the channel from the second communication path device and sends it to the fault monitoring device.

In the above configuration, when the host station detects a failure in the first digital line, the failure information channel in the first line termination device of the remote station is connected to the first communication path device. A configuration may also be adopted in which a command instructing switching is sent to the remote station via the second digital line.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention. The switching system of this embodiment includes a control device 6, a first communication path device 5 controlled by the control device 6, and first and second circuits accommodated in the communication path device 6 in a remote exchange. It is equipped with terminal devices 3 and 1, and a fault notification device 36 that collects fault information that has occurred in the remote station and sends it to the line terminal device 3. a second communication path device 7 to receive the communication path device 7;
third and fourth line termination devices 4 and 2 housed in;
The central control device 8 monitors fault information from the line termination device 4.
A fault monitoring device 46 that notifies the line terminating device 1
and line termination device W2 are connected via digital lines 111 to 11N, and line termination device 3 and line termination device 4 are connected via digital lines 131 to 13N.

Each of the line termination devices 1.2 includes a control circuit 10.2.
20, the communication path interface circuit 11゜21, the inserter/dropper circuit 1.2.22, and the multiplexing circuit 13
．． 23 and a link control circuit 14.

Further, each of the line termination devices 3 and 4 includes a control circuit 30
．． 40, a communication path interface circuit 3141, an inserter/dropper circuit 32.42, and a multiplexing circuit 33.
43 and fault detection circuits 35 and 45, respectively.

Next, the operation will be explained.

Fault information of the remote station exchange is normally transmitted from the fault notification device 36 to the inserter/dropper circuit 3 of the line termination device 3.
2, passes through the multiplexing circuit 33 and the fault detection circuit 35, and is inserted into a specific channel of the digital line 131.
Output to the host station side. The fault information of the remote station received by the line termination device 4 of the host station is sent to the fault detection circuit 45.
Through the multiplexing circuit 43, the inserter/dropper circuit 42
The channel containing the fault information is extracted and sent to the fault monitoring device 46. The failure monitoring device 46 notifies the central control unit 8 of the exchange of the host station of the failure information of the remote station.

Now, if the digital line 131 becomes faulty, the fault detection circuit 45 of the line termination device 4 on the host station side detects the line fault, and the line is transmitted from the control circuit 40 via the communication path interface circuit 41 and communication path device 7 to the central Report to control device 8.

The central control device 8 performs the following processing in order to obtain fault information of the remote station via the digital lines 111 to 11N accommodated in the line termination device 1. First, the inserter/dropper circuit 32 is controlled by the control circuit 30 so as to send the fault information input from the fault notification device 36 of the remote station to the inserter/dropper circuit i32 of the line termination device 3 to the communication path device 5. This is done as follows. First, the central control device 8 causes the inserter/dropper circuit 32 to send fault information of the remote station from the fault notification device 36 inputted to the inserter/dropper circuit 32 of the line termination device 3 of the remote station to the channel device 5. A command to control is sent to the line termination device 2 via the communication path device 7. Communication path interface circuit 2 of line termination device 2
1, the channel containing this command is extracted and input to the control circuit 20. In the control circuit 20, since this command is for a remote station, for example, the digital line 111 used for control between the host station and the remote station
The link control circuit 21. inserter/
Dropper circuit 22. It is inserted through the multiplexing circuit 23 and is inserted into the multiplexing circuit 13 of the line termination device 1 on the remote station side. to the inserter/dropper circuit 12. The inserter/dropper circuit 12 extracts the channel containing this command and inputs it to the control circuit 10 via the link control circuit 14.

The control circuit 10 sends the received command to the channel interface circuit 11 and notifies the control device 6 via the channel device 5. The control device 6 inputs this command to the control circuit 30 via the communication path device 51 and the communication path interface circuit 31 of the line termination device 3. The control circuit 30 controls the inserter/dropper circuit 31 according to the command, and the fault notification device 36
The fault information from the inserter/dropper circuit 321 is sent to the channel device 5 via the channel interface circuit 31.

The fault information of the remote station sent to the communication path device 5 is input to the line termination device 1 according to instructions from the control device 6, and the fault information is sent to the host 1 to the station side through an empty channel among the digital lines 111 to 11N. is sent to the line termination device 2. The selection of an empty channel is instructed from the central control device 8 on the host station side to the control device 6 on the remote station side in the same manner as described above.

The fault information of the remote station inputted to the line termination device 2 on the host station side passes through the communication path device 7 and is inputted to the line termination device 4. The central controller 8 sends the fault information of the remote station input to the line termination device 4 to the fault monitoring device 46 through the communication path interface circuit F! The controller 40 instructs the control circuit 40 of the line termination device 4 via the channel device 71 and the channel interface circuit 41 to connect @41 and the fault monitoring device 46.

In this way, the fault information from the remote station is transmitted to the inserter/dropper circuit of the line terminating device 4 via the fault notification device 361 line terminating device 31 channel device 57 line terminating device]1 line terminating device 21 channel device 6. 42 to the fault monitoring device 46.

〔Effect of the invention〕

As explained above, in the case where a fault occurs in the digital line for failure notification of a remote station, the failure of remote stations 1 to 1, which is input from the failure notification device to the line termination device, is transmitted from the line termination device to the remote station. The fault information is sent to the host station's line termination equipment via the communication line equipment of the exchange on a digital line different from the faulty line, and the host station transmits the received fault information to the communication line equipment. By connecting the fault monitoring device via the network terminal and inputting the input to the line termination device that accommodates the faulty digital line, even if the digital line in use becomes faulty, the fault at the remote station can be detected via another route. Information can be notified to the host station, and failure information of the remote station can be notified without waiting for the digital line to recover from the failure, which has the effect of increasing system reliability.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention. 1 to 4... line termination device, 5.7... call path device,
6...Control device, 8...Central control device, 10.20
30.40...control circuit, 11.21,31. ．． 41
...Call interface circuit, 12, 22.324
2. Inserter/dropper circuit, 13.23°33.
43... Multiplexing circuit, 14.24... Link control circuit, 35.45... Fault detection circuit, 36... Fault notification device, 46... Fault monitoring device.

Claims (1)

[Scope of Claims] 1. In a failure notification method for notifying a host station of failure information in a remote station of a switching system consisting of a host station and a remote station connected via a digital line, a first
and a second line terminating device accommodating each of the first and second line terminating devices; a first communication path device accommodating the first and second line terminating devices; a fault notification device for sending out a fault notification to the first line terminating device; third and fourth line terminating devices accommodating each of the first and second digital lines; A host station includes a second communication path device that accommodates a line termination device, and a fault monitoring device that monitors failure information extracted from the third line termination device, and the first line termination device of a remote station Normally, the fault information entered into the first digital line is inserted into a specific channel on the first digital line and sent to the third line terminating device of the host station.
The line terminating device sends fault information extracted from a specific channel on the first digital line to the fault monitoring device, and when the first digital line has a fault, the first line of the remote station A channel of fault information input to a termination device is connected to the first communication path device, and from the first communication path device to the host station via the second circuit termination device and the second digital line. The fourth line termination device of the host station sends the received failure information to the third line termination device via the second channel device, and the fourth line termination device of the host station sends the received failure information to the third line termination device via the second communication path device. The remote station fault notification method is characterized in that fault information is extracted from a channel from the second channel device and sent to the fault monitoring device. 2. When the host station detects a failure in the first digital line, it instructs the first line termination device of the remote station to switch the connection of the failure information channel to the first communication path device. 2. The remote station fault notification system according to claim 1, wherein a command is sent to the remote station via the second digital line.