JPS60116264A - Abnormality monitoring device for switching equipment - Google Patents

Abstract

PURPOSE:To prevent malfunction of an abnormal supervisory device attended with initialization of an exchange by providing a means inhibiting an output of an abnormal signal until the initialization of the exchange is finished. CONSTITUTION:The abnormal supervisory device 4 is provided with a transformer 41 receiving a dial tone signal S1 from the exchange 1, a dial tone detection circuit 42 and a decision circuit 43 judging whether or not the signal detected by the detection circuit 42 is normal. An output of the decision circuit 43 is given to a set terminal S of an FF47 and a system start end signal SIPL from the exchange 1 is fed to a reset terminal R. Thus, the initialization of the exchange 1 is finished, no abnormal signal S4 from the FF47 is generated. Thus, malfunction of the abnormal supervisory device attended with the initialization of the exchange is prevented in this way.

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to an abnormality monitoring device for monitoring the normality of the operation of a telephone exchange.

BACKGROUND TECHNOLOGY AND PRIOR ART AND PROBLEMS Telephone exchange systems are equipped with various abnormality monitoring devices. call,
There is an abnormality monitoring device that monitors the normality of an exchange by receiving all dial tones from the exchange in response to the call.

In such a telephone exchange system, when the system is activated, the telephone exchange generally has a built-in program control device that initializes the system upon activation. However, when the system is initialized by the program control device built into the exchange.

For example, it may take several minutes or more. However, the abnormality monitoring device does not require much time for initialization unlike a switchboard, and can be activated immediately if the system is started as a switchboard system at the same time as the switchboard control device. Therefore, if a call is made before the initialization of the exchange is completed, the exchange will not be able to send out a dial tone in response to the call, and the abnormality monitoring device will generate a signal that indicates an abnormality in the exchange.

There are various methods for preventing the above-mentioned damage caused by system startup. For example, the calling cycle of the abnormality monitoring device may be longer than the initialization time of the converter. However, this method has a problem in that abnormality detection is delayed. Another possible method is to turn on the power to the abnormality monitoring device after the initialization of the exchange is completed and activate the abnormality monitoring device, but this method requires a power-on control circuit and the device This is complicated and economically undesirable.

OBJECTS OF THE INVENTION An object of the present invention is to provide an abnormality monitoring device for an exchange that does not output an abnormality signal upon activation of the system, using relatively simple means, without delaying the timing of abnormality monitoring detection. .

Structure of the Invention In the present invention, a telephone is connected to an exchange as one of the telephones, and periodically calls the exchange, receives all the dial tones of the exchange in response to the call, and monitors the normality of the exchange. An abnormality monitoring device for an exchange that operates, including a means for not outputting an abnormality signal until the exchange is activated, completes a predetermined initial operation, and can respond to a call from the abnormality monitoring device. shall be. An embodiment of the invention in which an abnormality monitoring device is provided An embodiment of the invention will be described with reference to the accompanying drawings.

FIG. 1 shows a configuration diagram of an exchange system including an abnormality monitoring device of the present invention. In FIG. 1, an abnormality monitoring device 4 is connected to an exchange 1 in the same way as a normal telephone 3, and an abnormality monitoring signal s4 from the abnormality monitoring device is applied to a control device 2.

The abnormality monitoring device 4 shown in FIG. 1 shows only the part related to the present invention, and the dial tone signal S1 from the exchange 1 is
A transformer 41 . A dial tone detection circuit 42 is provided on the secondary side of the 1' lance. A determination circuit 4 that determines whether the signal detected by the detection circuit is normal.
3 is provided. The output of the determination circuit 43 is input to a set terminal S of a flip-flop 47, which will be described later.

Further, a periodic signal 8 having a constant period is based on a clock signal OLK generated by a clock signal generation circuit (not shown).
A timing circuit 44 for generating p't- is provided, and this periodic signal sp is turned on or turned off by a transistor 45 to operate or restore the H relay 46.

The contact 461 of this l-1 relay disconnects the primary circuit of the transformer 41, and sends a call to the exchange to send a dial tone signal Sl.
i The periodic signal Sp is applied to the detection circuit in response to the timing of the periodic signal Sp.

The fc periodic signal s is used to operate a calling circuit (not shown), a detection circuit 421, and a determination circuit 43.

The set terminal S of the clipfrosive 47 receives the judgment signal from the judgment circuit 43, which is logic "1" in case of abnormality.

is applied to the reset terminal R, and a system start-up completion signal 5XPL is applied from the exchange 1 to the reset terminal R, which is an inverted logic "1" when the system start-up is completed. If the ζ terminal of the flip-frog 47 determines that exchange 03!1 is abnormal and fc, the abnormal output signal S4 of logic "1" is output from the control bag @2.
and also. The terminal is connected via the buffer circuit 48.
When the exchange 1 is abnormal, one light emitting diode 49 is turned on.

The operation of the present invention will be described below with reference to FIG. Assume that the power PwR of the switching system is turned on at timing tl (FIG. 2(a)) at 6 (FIG. 2(b)).

As a result, switch 1. The control device 2° and the abnormality monitoring device 4 are activated.

Since the activation of abnormality monitoring bag #4 is completed immediately, a periodic signal sp with a constant time width τ is not generated (see Fig. 2 (C)).
As a result, a calling signal is issued to the exchange 1 by a circuit not shown (FIG. 2(d)).

However, exchange 1 is in the process of system initialization.

Since it is not ready to respond to the calling signal, the dial tone signal 81 is not issued within the predetermined time τ.

Therefore, the determination circuit 43 of the abnormality monitoring device 4 applies a logic "1" signal to the set terminal S of the 7-lip 70 knob 47, but also applies a logic "0" system startup completion signal S to the reset terminal 4. L is inverted and applied to the Noritsubu flop 47. Leave the terminal at “0” and the ζ terminal at “1”.
Therefore, exchange 1 is not considered to be abnormal.

The above operation continues at a constant period T (FIG. 2(C)).

At least as long as the system startup completion signal S, L from the exchange 1 does not become logic "1" indicating startup completion, the output signal S4 of the abnormality monitoring device 4 is logic "0" and the light emitting diode 49 lights up. do not.

At timing t2 (FIG. 2 fa), the system startup of the exchange 1 is completed, and the system startup completion signal S□
, L becomes 11'', a calling signal Sc is issued by the 1 periodization signal Sp, and if the dial tone signal S1 is normally input to the abnormality monitoring device 4 within a certain period, the exchange 1 is judged to be normal. be done.

However, at timing t3 (Fig. 2 (aJ)
.

If the dial tone signal S1 is not normally inputted within a certain time τ in response to the calling signal Sc, the flip-flop 47 is set and an error signal S4 is output from the Q terminal to the control device 2 (see FIG. 2). ).

The light emitting diode 49 lights up (FIG. 2(h)).

In the above embodiment, the system startup completion signal S
．． Although the case has been described in which the signal is automatically outputted from the exchanger 1, it may also be applied manually by the operator.

Further, in the above embodiment, the flip-flop 47 is set to the first
I have described the case where the LC is connected as shown in the figure.

System start-up completion signal As a signal for activating the clock signal generation circuit (not shown), the power is turned on and ready for operation V
C. However, the abnormality monitoring device itself may not be activated at all.

Effects of the Invention As described above, according to the present invention, with a relatively simple circuit configuration, it is possible to detect an irreversible switching equipment abnormality due to system initialization of the switching equipment without extending the abnormality monitoring interval. can be prevented.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing an embodiment of the present invention. FIG. 2 is a signal timing diagram of the circuit of FIG. 1. (Explanation of symbols) 1... Exchange machine. 2...Control device. 3...Telephone. 4... Abnormality monitoring device. 41...Trance. 42...Detection circuit. 43...judgment circuit, 44...Timing circuit. 45...Transistor. 46...l] relay. 47...Flip-flop. 48...Buffer. 49... Light emitting diode. patent applicant Fujitsu Limited patent application agent Patent attorney Akira Aoki Patent attorney Kazuyuki Nishidate Patent attorney 1) Yukio Patent attorney Akira Yamaguchi

Claims (1)

[Claims] 1. Connected to an exchange as one of the telephones. In an abnormality monitoring device for an exchange, which periodically makes a call to an exchange, receives the dial tone of the exchange that responds to the call, and monitors the normality of the exchange, the exchange is activated, a predetermined initial operation is completed, and the abnormality is detected. The present invention is characterized by providing a means for not outputting an abnormal signal until a call from the monitoring device can be answered. Abnormality monitoring device.