JPS63272149A - Alarm transferring system for remote telephone exchange - Google Patents

Abstract

PURPOSE:To surely report the memory trouble, etc., of a remote station control equipment to a high rank equipment without fail by providing a circuit to detect a trouble and a logical circuit at the remote station control equipment of a master station side, connecting mutually a remote station control equipment and inputting the output of respective logic circuits to the high rank control equipment to execute the alarm action. CONSTITUTION:At plural remote station control equipments 10, 20 and 30 provided at a master station, a circuits 13, 23 and 33 to detect the trouble of respective equipments and all line troubles of a PCM carrier line connected to the respective equipments, and logic circuits 15, 25 and 35 whose inputs are the outputs of above circuits are provided. Further, after mutual connection is executed so that a part of the output of the logic circuits 15, 25 and 35 can be a part of the input of the logic circuit of other remote station control equipments 10, 20 and 30, the output of respective logical circuits 15, 25 and 30 is inputted to a high order control equipment to execute the alarm action, one remote station control equipment is mutually selected among respective remote station control equipments 10, 20 and 30 and the reporting of the alarm to the host equipment can be executed. Thus, even when the memory trouble of the remote station control devices 10, 20 and 30 occurs, the remote station alarm information can be outputted without fail.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an alarm transfer method for a remote telephone exchange, and particularly to a remote telephone exchange in which a plurality of control devices are arranged in a master station and a remote station, and switching processing is performed by load distribution. Regarding the alarm transfer method of the remote telephone exchange in the exchange explanation.

[Prior Art] Conventionally, as shown in FIG. 2, a plurality of (three in this case) remote station control devices 10. A plurality of terminal control devices 10 of remote stations each connected to
A remote station switching system has been proposed in which distribution and switching are performed using ', 20', and 30'. In this remote station switching system, even if all PCM carrier lines between a specific remote station controller and remote station terminal controller fail, alarm information is transferred between other controllers so that the In order to enable the master station to monitor alarms, remote station alarm information is transmitted from the alarm collection device 5 installed at the remote station to all terminal control devices 10', 20'.

30'. Then, on the master station side, an arbitrary remote station controller selected according to instructions from the central processing unit 3 on the condition that the carrier line 1 and the equipment status are normal transmits this alarm information to the call path controller 2. The alarm information is sent to the central processing unit 3 via software processing, and the central processing unit 3 outputs the alarm information to a typewriter 4 or the like.

(Problems to be Solved by the Invention) In the conventional remote station alarm transfer method described above,
On the condition that the M carrier line 1 and device status are normal, a command is sent from the central processing unit 3 of the master station to specify a remote station control device that transfers alarm information from the remote station to the host device. There is. At this time, the central processing unit 3 stores this command in the memory of the remote station controller, and when alarm information is received from the remote station, it determines whether or not to send the alarm information to the host device based on this stored information. It is determined whether Therefore, if this stored information is destroyed due to a failure that cannot be detected by the central processing unit, such as a temporary memory failure in the remote station controller, the central processing unit issues an instruction to specify a new remote station controller. As a result, the alarm information from the remote station is not transferred from any remote station control device to the host device, and there is a problem that the remote station alarm information is not output to a typewriter or the like.

SUMMARY OF THE INVENTION An object of the present invention is to provide a remote telephone exchange alarm transfer method that can reliably output remote station alarm information even when a memory failure occurs in a remote station controller.

[Means for solving problems]

The remote telephone exchange alarm transfer system of the present invention includes a plurality of remote station control devices provided on the master station side, a circuit for detecting a failure in each device and a failure in all the PCM carrier lines connected to each device; A logic circuit that takes the outputs of these circuits as input is provided, and a part of the output of this logic circuit is interconnected so that it becomes part of the input of the logic circuit of another remote station controller, and each logic circuit is The configuration is such that the output can be input to the higher-level control device that operates the alarm, and each remote station control device can mutually select one remote station control device to report the alarm to the higher-level device. .

〔Example〕

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

FIG. 1 is a block diagram of a master station in a remote telephone switching system. This embodiment shows an example in which one remote station is controlled by a royal remote station control device.

Station alarm information such as a fire or power failure occurring at a remote station (not shown) is sent to the first remote station controller 10 of the master station via the PCM carrier line l. It is transmitted to the second remote station controller 20 and the third remote station controller 30, and is transmitted to the line control circuits 11, 21 of each remote station controller 10, 20.30.
．． Alarm information receiving circuit 12, 22.3 via 31
2, respectively.

The fault detection circuits 13, 23, and 33 of each of the remote station control devices 10, 20, and 30 monitor the operating state of its own device and the operating state of the PCM carrier line 1, and detect a fault in its own device or the state connected to its own device. If all PCM carrier lines are out of order, two people will be sent to gates 14, 24, 34 and 3.
A logic 1 signal is sent to the driver gate 15, 25.35,
If both are normal, a logic O signal is output.

Further, each of the remote station control devices 10, 20, 30 is connected to the communication path control device 2, and further connected to the central processing device 3 and typewriter 4 as before.

Next, the operation of this embodiment system will be explained.

In FIG. 1, it is assumed that the first remote station control device 10 is experiencing a failure, and the second remote station control device 20 and the third remote station control device 30 are operating normally.

1st remote station control device 1002 people gate 14
A logic 1 signal is always input to the input terminal A of the , and a logic 1 signal is input from the fault detection circuit 13 to the other input terminal B. As a result, the 2 of the second remote station controller 20
A logic 1 signal is output to the input terminal A of the human AND gate 24 and the input terminal of the 3-input AND gate 25. Also,
Alarm information receiving port vr of the first remote station control device 10
12 outputs the remote station alarm information received from the remote station to the input terminal F of the 3-input AND gate 15; however, if the own device is in trouble, the fault detection circuit 13 outputs the remote station alarm information received from the remote station to the negative logic input terminal of the 3-input AND gate 15. Since a logic 1 signal is output to E, the remote station alarm information is not output to the output terminal G of the 3-input AND gate 15, and is not reported to the communication path control device 20, which is a host device.

On the other hand, the logic 1 signal is inputted from the first remote station control device 10 to the input terminal A of the two large chain gates 24 of the second remote station control device 20 as described above, and the logic 1 signal is input to the other input terminal B. A logic O signal is input from the detection circuit 23, and as a result, a logic 0 signal is output from the output terminal C of the two large AND gates to the third remote station controller 30. Also,
Alarm information receiving circuit 2 of second remote station control device 20
2 outputs the remote station alarm information received from the remote station to the input terminal F of the 3-input AND gate 25. A logic 0 signal is input from the fault detection circuit 23 to the negative logic input terminal E of the 3-input AND gate 25, and a logic I signal is input from the first remote station controller 10 to the other positive logic input terminal. Therefore, the 3-input AND gate 25 reports remote station alarm information from the output terminal G to the communication path control device 2, which is a host device.

Furthermore, the positive logic input terminal of the 3-input AND gate 35 of the third remote station controller 30 is connected to the second remote station controller 2.
Since the logic 0 signal is received from 0, the alarm information from the remote station received by the alarm information receiving circuit 32 similarly to the first remote station control device 10 is transmitted from the output terminal G of the 3-input AND gate 35 to the host device. It is not reported to the communication path control device 2, which is the communication path control device 2.

In this way, the remote station alarm information received from the remote station to the three remote station controllers 10, 20 and 30 of the master station is transmitted to one remote station controller (the second remote controller 20 in the example). The information is reported only to the communication path control device 2, and is output to the typewriter 4 via the central processing device 3.

Therefore, even if a memory failure or the like occurs in the remote station controller, remote station alarm information can be reliably reported to the host device by the remote station controller.

Here, in the above embodiment, three 21 mo station control devices are used as an example, but the present invention can be similarly applied to a configuration with four or more.

[Effects of the Invention] As explained above, the present invention provides a plurality of remote station control devices provided on the master station side with circuits for detecting faults in each device and all lines of the PCM carrier line, and outputs of these circuits. The remote station controllers are connected to each other by providing input logic circuits, and the output of each logic circuit can be input to the higher-level controller that operates the alarm, so there is no mutual connection between the remote station controllers. It is possible to select one remote station controller to report alarms to the higher-level device, and even if a memory failure of the remote station controller occurs, remote station alarm information can be reliably reported to the higher-level device. effective.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of the main parts of the present invention, and FIG. 2 is a configuration diagram showing the overall configuration of the remote office telephone switching system. ■... PCM carrier line, 2... Call path control device, 3... Central processing unit, 4... Typewriter, 5...
...Alarm information collection device, 10...First remote station control device, 20...Second remote station control device, 30.
...Third remote station control device, 10', 20', 30'
...Terminal control device, 11,21.31...Line control circuit, 12.22.32...Alarm information receiving circuit,
13゜23.33...fault detection circuit, 14.24.3
4...2 large gates, 15, 25, 3.5...
・Three major Kaand gates.

Claims (1)

[Claims] (1) In a remote station switching system that connects multiple remote station control devices installed in a master station and multiple terminal control devices installed in remote stations through PCM carrier lines, and performs switching processing operations by distributing the load. , the remote station control device is provided with a circuit for detecting a fault in each device and a fault in all of the PCM carrier lines connected to each device, and a logic circuit that receives the outputs of these circuits as inputs; A part of the output of the circuit is interconnected so that it becomes part of the input of the logic circuit of another remote station control device, and the output of each logic circuit is configured so that it can be input to the upper control device that operates the alarm. A remote telephone exchange alarm transfer method characterized by: