JP2522038B2 - switch - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exchange in which communication of control data between a main control device and a peripheral circuit is executed via the communication control device. The present invention relates to an exchange having a function of performing diagnostic control.

[Conventional technology]

In an exchange that executes communication of control data between a main control device and a peripheral circuit via the communication control device, regular diagnosis control of the peripheral circuit is performed based on a program prepared in the main control device. That is, in such a switch,
A program for controlling the periodic diagnosis is installed in the main control unit, and the main control unit periodically transmits / receives a diagnostic command to / from the peripheral circuit to perform the periodic diagnosis of the peripheral circuit.

[Problems to be Solved by the Invention]

For this reason, in such an exchange, the processor in the main control unit is used when transmitting and receiving the diagnostic command periodically, so that if the number of peripheral circuits accommodated in the exchange is large, the processor is not processed during the periodic diagnosis. The resource monopoly time will increase in proportion to this. As a result of this,
There is a problem that the call processing capability of the processor of the main control unit is reduced.

Therefore, an object of the present invention is to provide an exchange capable of performing regular diagnosis without deteriorating the call processing capability of the communication control device.

[Means for solving the problem]

In the present invention, (i) a main switch, (ii) some peripheral circuits connected to this main switch, (iii) a main controller connected to the main switch via an internal control bus, (iv) ) A processor independent of this main controller is provided, which sends and receives control commands to and from the peripheral circuits and periodically sends diagnostic commands to the peripheral circuits, and when a diagnostic response command is returned from the peripheral circuits, this command is sent. And the communication control device for notifying the main control device of this when an abnormality of the peripheral circuit is detected by analyzing the above.

That is, in the present invention, the processor on the communication control device side controls the periodic diagnosis to reduce the load on the main control device side and achieve the above-mentioned object.

〔Example〕

 Hereinafter, the present invention will be described in detail with reference to Examples.

FIG. 1 shows the structure of an exchange according to an embodiment of the present invention. This switch has a primary switch 11
And the second peripheral circuits 12 and 13 are connected. The main controller 15 is connected to the main switch 11 and the communication controller 17 via an internal bus 16 and controls these. The communication controller 17 controls the peripheral circuit control bus 18 to execute transmission and reception of control command data between the main controller 15 and the peripheral circuits 12 and 13. Further, at the time of regular diagnosis, a diagnostic command is transmitted to these peripheral circuits 12 and 13, and when a diagnostic response command is returned from the peripheral circuits 12 and 13, this is analyzed. In this way, it is regularly diagnosed and processed whether these peripheral circuits 12 and 13 are operating normally. For this reason, the communication control device 17 is provided with a CPU (central processing unit) different from the main control device, and the periodic diagnosis is performed using a program stored in its own ROM (read only memory). It is designed to control.

FIG. 2 shows the structure of the program stored in the ROM of this communication control device. In this way, the communication control device 17 includes (a) a peripheral circuit periodic diagnosis control program 21 for processing the periodic diagnosis of the peripheral circuits 12 and 13,
(B) A control command transmission / reception control program 22 for processing transmission / reception of control commands between the main controller 15 and the peripheral circuits 12 and 13 exists as a main program. Both of these control programs 21 and 22 call the main controller communication control program 23 to execute transmission / reception of control data to / from the main controller 15. Further, the peripheral circuit communication control program 24 is called to execute transmission / reception of control data with the peripheral circuits 12 and 13.

FIG. 3 shows a state of the periodic diagnosis control performed by the communication control device. That is, the communication control device 17 periodically transmits a diagnostic command to the peripheral circuits 12 and 13 in accordance with the description of the peripheral circuit periodic diagnosis control program 21 (step in FIG. 3). And the peripheral circuit 12,
Check if the diagnostic response command for this is returned from 13 (step,). If the diagnostic response command is returned before the predetermined time t has elapsed (step; Y), it is checked whether this command is normal (step). If the diagnostic response command is not normal (N), or if the diagnostic response command is not returned before the time t has elapsed (step; Y), the peripheral circuit 12 or
13 is determined to be abnormal. In this case, the number of the peripheral circuit 12 or 13 in which the abnormality is determined is added and the main controller 15 is notified of this (step).

When the main control unit 15 receives the peripheral circuit abnormality notification from the communication control unit 17, the peripheral control unit 12 or 13 performs a failure process such as initialization restart control or blocking control.

〔The invention's effect〕

As described above, according to the present invention, the communication control device in the exchange performs the transmission of the diagnostic command to the peripheral circuit and the reception and analysis of the diagnostic response command, and the main control is performed only when an abnormality is detected. The device is notified. Therefore, the main control device only needs to perform the failure process when receiving the notification that the abnormality is detected, and does not need to perform any process such as sending the diagnostic command. The burden can be greatly reduced. As a result, the call processing capability of the processor of the main control device can be increased.

[Brief description of drawings]

The drawings are for explaining one embodiment of the present invention, in which FIG. 1 is a block diagram showing an outline of a circuit configuration of an exchange, and FIG. 2 is an explanatory diagram showing a configuration of a program of a communication control device. FIG. 3 is a flow chart showing the regular diagnosis operation of the communication control device. 11 …… Main switch, 12,13 …… Peripheral circuit, 15 …… Main control unit, 16 …… Internal control bus, 17 …… Communication control unit, 21 …… Peripheral circuit periodic diagnosis control program.

Claims (1)

(57) [Claims] 1. A main switch, a peripheral circuit connected to the main switch, a main controller connected to the main switch via an internal control bus, and a processor independent of the main controller, Abnormality of the peripheral circuit was detected by transmitting and receiving control commands to and from the peripheral circuit and periodically sending a diagnostic command to the peripheral circuit, and analyzing when the diagnostic response command was returned from the peripheral circuit. And a communication control unit for notifying the main control unit to that effect.