JPH04167747A - Fault monitoring device for electronic exchange - Google Patents

Abstract

PURPOSE:To surely detect a fault by providing an audible tone monitor circuit superimposing it that when no audible tone signal is stopped while no talking is implemented to each subscriber circuit. CONSTITUTION:Subscriber circuits 111-11n and an audible tone generating circuit 13 are all connected to a time division channel bus 15 and audible tone monitor circuits 171-17n are respectively provided to the subscriber circuits 111-11n. Then a specific time slot of a time division channel bus 15 is allocated for an audible tone signal and the stop of a change in a data pattern of a designated audible tone signal is detected for a period while no talking is implemented in the subscriber circuits 111-11n. and the trunk circuit. Thus, before the user listens actually to an audible tone, the stop of the audible tone is found out in advance and the deteriorated service performance of the system and occurrence of a complaint from the user are prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a failure monitoring device for an electronic exchange, and more particularly to a failure monitoring device for an electronic exchange that is capable of detecting a failure by directly using an audible signal. .

[Conventional technology]

Conventionally, this type of electronic exchange has a plurality of subscriber circuits and trunk circuits, an audible sound generating circuit that creates a digitized audible sound signal, and the subscriber circuits, trunk circuits, and audible sound generating circuit connected to each other. , a time-shared channel bus having a plurality of time slots, and a central controller for specifying time slots for use by the subscriber circuits and trunk circuits.

Such an electronic switch allows the subscriber circuits and trunk circuits to send and receive call data using the designated time slots.

By the way, according to the above-mentioned electronic exchanges, although some have been proposed that are equipped with a failure detection function, there have been almost no examples of electronic exchanges that directly detect failures using audible signals.

In addition, in some of the above electronic exchanges, it is possible to detect tarot disconnection in the audible sound generation circuit, or when the subscriber circuit or trunk circuit actually receives an audible sound signal and sends it to the terminal or player, It only had a parity error detection function.

[Problem that the invention seeks to solve]

The conventional failure monitoring device for electronic exchanges described above does not directly monitor the audible signal data itself, and does not directly monitor the audible signal data itself.
This was indirect monitoring by detecting parity errors on the communication path.

For this reason, failure monitoring devices that detect failures due to clock interruptions have the disadvantage that failures cannot be detected at all if the data generation circuit in the audible sound generation circuit itself fails or if the data generation itself is incorrect. there were.

Additionally, fault monitoring equipment that uses a parity error detection method on the communication path bus usually monitors when receiving from the communication path bus in order to actually use audible sound, so detection may be delayed. There is a drawback. In other words, this method has a major drawback in that a malfunction is discovered only after a user complains that they cannot hear the audible sound when they actually try to listen to the audible sound. In particular, if the dial tone or ring tone stops, there is a risk that the user will stop making the call itself, and from the user's perspective, this has the disadvantage of having the same effect as a system down.

SUMMARY OF THE INVENTION An object of the present invention is to provide a failure monitoring device for an electronic exchange that can solve the above-mentioned problems and reliably detect failures.

[Means to solve the problem]

A failure monitoring device for an electronic exchange according to the present invention has a plurality of subscriber circuits, an audible sound generating circuit for creating a digitized audible sound signal, and a plurality of time slots, the subscriber circuit and the audible sound generating circuit and a central control unit that specifies time slots to be used by the subscriber circuits, and the subscriber circuits use the specified time slots to transmit and receive call data. In the electronic exchange, each of the above-mentioned subscriber circuits, when not making a call via the time-division communication path A, uses the time-division communication path bus allocated for the audible sound signal from the audible sound generation circuit. The present invention is characterized in that an audible sound monitoring circuit is provided which receives an audible sound signal of a specific time slot and monitors whether the audible sound signal has stopped.

In addition, the time-division communication path consists of a communication data bus for passing communication data and a control signal line for passing control signals, and the audible sound generation circuit generates a header signal indicating the start of a data pattern cycle for each of the various digitized audible sounds. A periodic header sending circuit that can be sent to a control signal line is provided, and an audible sound monitoring circuit provided in each subscriber circuit has a pattern memory that stores the data pattern of the digitized audible sound signal, and reads out the data pattern from the pattern memory. It may consist of a comparison circuit that detects coincidence with audible signal data received from the time-division channel bus when no communication is performed.

Furthermore, it is preferable that the audible sound monitoring circuit is provided with means capable of switching reception time slots to periodically change the type of received audible sound signal.

According to the above invention, a specific time slot of the time-division channel bus is allocated for an audible signal, and a pig pattern of a specified audible signal is transmitted in each subscriber circuit and trunk circuit during a period when no call is being made. It is possible to detect the stop of change, and to discover the stop of audible sound in advance, before the user actually listens to the audible sound.

Further, the present invention stores a data pattern of an audible signal in advance in each subscriber circuit and trunk circuit, and compares the data pattern with the audible signal data on a time-division channel bus to generate a simple audible signal. It is possible to detect not only system outages but also data abnormalities in advance.

Furthermore, the present invention can constantly monitor abnormalities in a plurality of audible sound signals by periodically changing the audible sound signals to be monitored.

〔Example〕

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

FIG. 1 is a system block diagram of an embodiment of a failure monitoring device for an electronic exchange according to the present invention.

In FIG. 1, subscriber circuits 11□ to 11. , and the audible sound generating circuit 13 are all connected to the time-division communication path bus 15, and each subscriber circuit 111-11, , is provided with an audible sound monitoring circuit 17□-17, respectively. Also,
Each subscriber circuit 11, to 11, and audible sound generation circuit 1
3 is connected to the central control unit 19 via the CPU bus 21.

Access control to the time-division channel bus 15 is also performed under instructions from the central controller 19. The system clock generation circuit 23 generates various clocks for synchronizing the frames of the time division time slots of the time division channel bus 15.
Each subscriber circuit 111 to 11n via a clock bus 25
and audible sound generation circuit 13. is supplied to.

FIG. 2 is an explanatory diagram showing a time slot configuration of a time-division channel bus used in an embodiment of the present invention.

Here, the clock (CLK) and frame synchronization signal (FH) supplied by the clock bus 25 cause
+1 time slot (TS.

~TS,) is shown. Further, in this example, three time slots TS and -TS2 are allocated to audible sound signals, indicating that three types of audible sounds a-C correspond to TSo-TS2, respectively.

FIG. 3 is a block diagram showing an embodiment of the audible sound monitoring circuit in the subscriber circuit in the above embodiment.

In FIG. 3, each audible sound monitoring circuit 17. 17r are the same circuits, so one circuit configuration will be explained and the other configurations will be omitted. The audible sound monitoring circuit 17 includes an audible sound time slot estimation circuit 300, a call reception time slot designation circuit 301, a passage data reception circuit 302, a reception timing generation circuit 303, a selection circuit 304, a gate circuit 306,
It consists of a data holding circuit 307 and a comparison circuit 308. In addition, signal lines 310.311.312.313 are connected between each element.
．． 314.315.

Next, the operation will be explained with reference to FIGS. 1, 2, and 3.

Each subscriber circuit 11, -11. ．． is the time-sharing route bus 15
When making a telephone call via the central control unit 19, reception-on information indicating the time slot number to be received is written into the telephone reception time slot designation circuit 301 according to an instruction from the central controller 19. This reception-on information causes the signal line 312 to go to a high level (hereinafter referred to as "H").
The selection circuit 304 selects the reception time slot number information side output from the call reception time slot designation circuit 301. The reception timing generation circuit 303 receives CLK which is manually input via a bus 313 connected to the clock bus 25.

Time slot timing information is created based on the FH multiplied signal, and a data reception timing signal corresponding to the reception time slot information manually entered via the selection circuit 304 is output to the signal line 311. It is also connected to the time-division call path bus 15, and the call data input via the signal line 310 is latched into the call data receiving circuit 302 by the reception timing signal on the signal line 311.

The received data taken into the call data receiving circuit 302 is transmitted to the subscriber circuits 111 to 1 through the gate circuit 306.
1. , or to the terminal side.

Next, when the call is not being made, that is, when the call has ended, the central controller 19 instructs the call reception time slot designation circuit 301 to write reception off information. As a result, the signal line 312 becomes a low level (hereinafter referred to as "L level"), the selection of the selection circuit 304 is switched to the audible time slot designation circuit 300, and the gate of the gate circuit 306 is closed. Here, in the audible sound time slot designation circuit 300, a time slot number for an audible sound signal specified in advance is written. For example, in the example of FIG. 2, if audible sound a is specified, "TSo" number information is written. This audible signal time slot number information is
Reception timing generation circuit 303 via selection circuit 304
The audible sound signal data is input to the call data receiving circuit 302 in the same manner as when receiving the call data.

This received audible sound signal data is latched into the data holding circuit 307 in the next frame period. In this way, the audible sound signal data of the current frame period and the audible sound signal data of the previous period outputted from the data holding circuit 307 are inputted to the comparison circuit 308, and the two are compared. 314. Here, when the signal line 314 shows a match in the comparison result, it means that there is no change in the audible sound signal data, that is, there is no sound, and it is possible to detect the stop of the audible sound signal.

In the embodiment shown in FIG. 3, an audible time slot designation circuit 300 is provided, but when the central controller 19 ends a call, it sends the audible time slot number to the call reception time slot designation circuit 301 along with reception off information. If you decide to write information, the audible time slot designation circuit 30
0 and selection circuit 304 are no longer necessary.

Next, regarding other embodiments (corresponding to claim 2), in addition to FIGS. 1, 2, and 3, FIGS. 4, 5,
This will be explained with reference to No. 6.

FIG. 4 is a block diagram showing another embodiment.

Here, time-division call path bus 15 is shown to include both a call data bus 411 for passing actual call data and a control signal line 410 for passing control information. This shows that the audible sound generation circuit 13 includes a periodic header sending circuit 400 that creates digital pattern periodic information of various audible sounds produced by the digital audible sound creation path and sends this to the control signal line 410. ing.

FIG. 5 shows the relationship between the digitization of the audible sound created by the audible sound generation circuit 13 and the periodic header information.

Here, an audible sound with a frequency of 8007 is expressed as 8Kl (
/- shows an example in which data is converted into digitized data according to the PCM encoding rule using a sample link. In this example, 10 cycles and 10 frames) is exactly one cycle, and the PC
The M digital data turn will repeat 10 patterns. A header signal indicates the start timing of this cycle.

FIG. 6 shows subscriber circuit 11. ~11. FIG. 2 is a block diagram illustrating an embodiment of an audible sound monitoring circuit in the device.

This embodiment has exactly the same configuration as the embodiment shown in FIG. 3, except for the pattern memo IJ 600 and memory readout circuit 601.

Again, as explained in the embodiment of FIG. 3, when a call is not being made, the call data receiving circuit 302 receives the audible signal data of the time slot specified by the audible time slot designation circuit 300. That will happen.

The pattern memory 600 stores in advance a data pattern of a specified audible sound signal.

In the example of 8007 audible sounds shown in FIG. 5, 10 bytes of data are stored. Then, data patterns are sequentially read out according to instructions from the memory read circuit 601. Here, the signal line 610 is connected to the control signal line 410 and receives the period header signal, and the memory read circuit 601 determines the start of the memory read period based on this period header signal. Become.

In this way, the audible sound signal data pattern read from the pattern memory 600 is received by the call receiving circuit 302. The audible sound signal data are compared by a comparison circuit 308, and whether or not they match is outputted to a signal line 314.

In this case, unlike the case of the embodiment shown in FIG. 3, the fact that the two do not match indicates that the audible sound signal supplied from the audible sound generation circuit 13 has become abnormal. Note that in both the embodiments shown in FIGS. 6 and 3, the comparison circuit 308
outputs the result only when the reception is off, that is, when the signal line 312 is at the "L" level.

Next, a third embodiment (corresponding to claim 3) will be explained with reference to FIGS. 1 to 7.

FIG. 7 is a block diagram showing an example of the configuration of the audible sound time slot designation circuit 300 in FIGS. 3 and 6. FIG.

In FIG. 7, a audible time slot designation circuit 70
o, n audible time slot designation circuit 701,...
It has an audible time slot designation circuit 70° and a switching synchronization counter circuit 71.

If it is desired to monitor a plurality of audible sounds in the reception off state, the audible sound signal time slot number information is sent to each audible sound time slot designation circuit 70. ~7
0. Write it in. The switching period counter circuit 71 controls the selection circuit 71o at an arbitrary period to switch the audible time slot number information to be monitored.

In this way, it is possible to sequentially monitor a plurality of audible sound signals in the manner described in the embodiment of FIG. 3 or FIG. 6.

In this case, if the central control unit 19 uses a method of sequentially rewriting the time slot number of the call receiving time slot designation circuit 301 to an audible signal time slot at an arbitrary timing, the circuit shown in FIG. 7 is unnecessary. Become.

〔Effect of the invention〕

As explained above, the present invention allocates a specific time slot of a time-division channel bus for an audible signal, and allows a specified audible signal to be transmitted in each subscriber circuit and trunk circuit during a period when no call is being made. By detecting the stoppage of change in the data pattern, it is possible to detect the stoppage of audible sound before the user actually listens to the audible sound, which has the effect of preventing system service degradation and user complaints.

Further, the present invention stores a data pattern of an audible signal in advance in each subscriber circuit and trunk circuit, and compares the data pattern with the audible signal data on a time-division channel bus to generate a simple audible signal. This has the effect of not only stopping data but also detecting data abnormalities in advance.

Furthermore, the present invention has the advantage that abnormalities in a plurality of audible sound signals can be constantly monitored by periodically changing the audible sound signals to be monitored.

[Brief explanation of drawings]

FIG. 1 is a system block diagram showing an embodiment of the fault monitoring device for an electronic exchange according to the present invention, FIG. 2 is a diagram showing an example of the time slot configuration of a time-division channel bus, and FIG. 4 is a block diagram showing another embodiment of the present invention, FIG. 5 is a block diagram showing the relationship between the digitization method of an audible sound signal and a header signal, and FIG. FIG. 7 is a block diagram showing an embodiment of the audible sound monitoring circuit, and FIG. 7 is a block diagram showing an example of the configuration of the audible sound time slot designation circuit. 11, ~11. ... Subscriber circuit, 13 ... Audible sound generation circuit, 15 ... Time division communication path bus, 17, ~ 17h ... Audible sound monitoring circuit, 19 ... Central control unit, 21 ... CPU bus, 23... System clock generation circuit, 300... Audible sound time slot designation circuit, 301... Call reception time slot designation circuit, 302... Call data reception circuit, 303... Reception timing generation circuit. , 304.71...Selection circuit, 307...Data holding circuit, 308...Comparison circuit, 4
00... Cycle header sending circuit, 600... Pattern memory, 601... Memory reading circuit, 71... Switching cycle counter.

Claims (1)

[Scope of Claims] 1. A plurality of subscriber circuits, an audible sound generation circuit that creates a digitized audible sound signal, and a plurality of time slots, and the subscriber circuits and the audible sound generation circuit are connected. and a central control unit that specifies a time slot to be used by the subscriber circuit, and the subscriber circuit transmits and receives call data using the specified time slot. an electronic switching system, wherein each of the subscriber circuits is connected to the time-division talk bus allocated for an audible tone signal from the audible tone generation circuit when not making a call via the time-division talk bus; 1. A failure monitoring device for an electronic exchange, comprising an audible sound monitoring circuit that receives an audible sound signal in a specific time slot and monitors whether the audible sound signal has stopped. 2. The time-division communication path bus consists of a communication data bus for passing communication data and a control signal line for passing control signals, and the audible sound generation circuit generates a header signal indicating the start of a data pattern cycle for each of the various digitized audible sounds. An audible sound monitoring circuit provided in each subscriber circuit has a pattern memory for storing data patterns of digitized audible sound signals, and a periodic header sending circuit capable of sending data patterns to the control signal line. 2. A failure monitoring device for an electronic exchange according to claim 1, further comprising a comparison circuit for reading out the data and detecting coincidence with audible signal data received from the time-division channel bus when no communication is performed. 3. Failure monitoring of an electronic exchange according to claim 1 or 2, wherein the audible sound monitoring circuit is provided with means capable of switching reception time slots to periodically change the type of received audible sound signal. Device.