JPH08102800A - Monitoring and controlling device for data transmission/ reception - Google Patents

Abstract

PURPOSE: To provide a data transmission/reception monitoring and controlling device capable of flexibly detecting abnormality even when the present station is in a speech mode and is switched from the speech mode to a data communication mode. CONSTITUTION: This device is provided with an abnormality detection level selection part 16 for selecting abnormality detection time respectively corresponding to the time when the present station is in the speech mode and the time when the present station is switched from the speech mode to the data communication mode and outputting it to a comparator circuit 14. A data abnormality time counting part 12 counts the time when the present station is in the speech mode when the present station is in the speech mode and counts the time after the present station is switched from the speech mode to the data communication mode until normal data are received when the present station is switched from the speech mode to the data communication mode.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transmission / reception monitoring control apparatus for monitoring and controlling data transmitted / received via a communication dedicated line used for data transfer and telephone calls.

[0002]

2. Description of the Related Art FIG. 10 shows a block diagram of an apparatus for transferring data or making a call between a master station and a slave station that are separated from each other through the same communication line.

When receiving data from the master station, the data from the master station data unit 4P is input to the modulator / demodulator 2P, where the data is demodulated and input to the line switching circuit 62P. The line switching circuit 1P is set to the data communication mode in order to transfer data. Data from the line switching circuit 1P is input to the line switching circuit 1C on the slave station side via the communication line C, demodulated by the modulation / demodulation device 2C, and received by the data device 4C. When it is desired to use this communication line C as a communication line between the master station and the slave station, the line switching circuit 1
By switching C and 1P to the call mode, it is possible to make a call between the telephones 20P and 20C connected to the line switching circuits 1P and 1C, respectively. In such a device that transfers data and makes a call through the same communication line, there is little opportunity for actually being used for a call, and it is almost used for a data communication.

Next, a conventional data transmission / reception monitoring device 10 will be described with reference to the block diagram of FIG. 11 and the timing chart of FIG.

In FIG. 11, a data transmission / reception monitoring device 1
0 is for detecting / reporting an abnormality in the data input via the modulation / demodulation circuit 2 and the receiving circuit 3. The data transmission / reception monitoring device 10 detects whether the data input from the reception circuit 3 is normal or abnormal, and if normal, a data abnormality determination unit 11 that initializes an integrated voltage value of a data abnormality time counting unit 12 to be described later, Clock transmission unit 1 that constantly transmits the clock
Data abnormality time counting unit 12 that integrates the voltage of the clock from 3 and the integrated voltage value and a predetermined abnormality detection level value A
It is composed of a comparison circuit 14 for comparing with L and an abnormality output circuit 15 for notifying that the reception of data is abnormal when the integrated value exceeds a predetermined abnormality detection level AL.

In FIG. 12, first, normal data is received between the own station and the partner station in the data communication mode, and then both stations simultaneously switch to the call mode (time t1), and then only the partner station receives the data. The case where the communication mode is switched to the communication mode (time t2) and then the own station is switched to the communication mode (time t3) is shown. At the time of the first transmission / reception of data (before time t1), since the data is normal, the integrated value of the data abnormality time counting unit 12 is initialized by the data abnormality determining unit 11 and is equal to the output value of the clock transmitting unit 13. It will be the same value. Next, since the communication line C is not connected to the data transmission / reception monitoring device 10 from the time when the communication modes are switched to each other until the own station switches to the data communication mode (time t1 to time t3), the data transmission / reception monitoring device 10 operates. do not do. After the own station switches to the data communication mode (time t3), an abnormality is detected in the data on the communication line C, so that the integrated value of the data error time counting unit 12 starts the integration. When the integrated value exceeds the predetermined abnormality detection level AL, the abnormality output circuit 15 outputs an abnormality (time t4).

[0007]

However, since the conventional data transmission / reception monitoring and control apparatus does not detect an abnormality when the own station is in the call mode, it does not matter whether the own station has terminated the call. If the handset does not return the handset correctly (which is often the case due to a missed return, incomplete return, etc., which is often the case), data will not be received indefinitely unless the observer is aware of this. It is inconvenient to continue. On the other hand, if the other station forgets to switch to the data communication mode after the other party has finished talking, even if an observer notices that switching is forgotten and tries to perform the switching operation, Before that, the data abnormal time counting unit 12 determined that the abnormality occurred and the abnormal output circuit 15 made an abnormal output, and the abnormal output was troublesome.

As described above, since the conventional data transmission / reception monitoring device detects an abnormality only when the own station is in the communication mode, when the user forgets to return the handset of the own station or the partner station after the call, the abnormality is completely detected. If the above is not performed or if a predetermined abnormality detection level is reached, an abnormal output is immediately output.

Therefore, an object of the present invention is to provide a data transmission / reception monitoring apparatus capable of flexibly detecting an abnormality not only when the local station is in the data communication mode, but also when in the call mode and when the call mode is switched to the data communication mode. To provide.

[0010]

A data transmission / reception monitoring apparatus of the present invention monitors and controls a data transmission / reception apparatus used for data communication or a call by switching the same dedicated communication line to either a data communication mode or a call mode. A data transmission / reception monitoring control device, which counts the time when an abnormal data is received, and a data abnormality determination unit which determines whether the data received from the communication dedicated line is abnormal when the own station is in the data communication mode. Data transmission / reception monitoring control device including a data abnormality time counting unit, a comparison unit that compares the counted time with a predetermined abnormality detection time to detect a communication abnormality, and an abnormality output unit that outputs an abnormality when a communication abnormality occurs In, when the local station is in the call mode and when the local station is switched from the call mode to the data communication mode, the corresponding abnormality detection time is selected and compared. Equipped with an abnormality detection level selection unit that outputs to the road, the data abnormality time counting unit counts the time when the own station is in the call mode when the own station is in the call mode, and the own station is switched from the call mode to the data communication mode. In this case, the time from when the local station is switched from the call mode to the data communication mode until it receives normal data is counted.

[0011]

The data transmission / reception monitoring apparatus of the present invention detects an abnormality occurring not only in the data communication mode but also in the call mode and when switching from the call mode to the data communication mode. The abnormality in the call mode is detected by comparing the time when the local station is switched to the call mode with a predetermined time for the call mode. For abnormalities that occur when switching from the call mode to the data communication mode, compare the time from when the local station switched from the call mode to the data communication mode until the normal data is received from the partner station with a predetermined time. To be detected.

[0012]

1 is a block diagram of an embodiment of a data transmission / reception monitoring and controlling apparatus according to the present invention. As shown in the figure, in the present embodiment, in addition to the abnormality detection level value AL1 in the data communication mode corresponding to the conventional abnormality detection level value AL, an abnormality detection level value AL2 in the call mode is newly added and data communication from the call mode is performed. Abnormality detection level value A when switching to mode
Three abnormality detection level values of L3 are prepared. One of these three values is selected by the abnormality detection level selection unit 30 according to the signal from the line switching circuit 1, and the selected value is output to the comparison circuit 14. Comparison circuit 14
Detects the abnormality by comparing the abnormality detection level value input from the abnormality detection level selection unit 30 with the integrated voltage value of the data abnormality time counting unit 12. Each abnormality detection level value corresponds to the time from the first detection of abnormality to the determination of abnormality (hereinafter referred to as diagnosis time). Therefore, the higher the abnormality detection level value, the longer the diagnosis time, and the accuracy of abnormality detection can be changed for each state by arbitrarily changing these values. Here, for example, the diagnosis time in the data communication mode is 60 seconds (abnormality detection level value A
(Corresponding to L1), the diagnosis time corresponding to the call mode is 5 minutes (corresponding to the abnormality detection level value AL2), and the diagnosis time when switching from the call mode to the data communication mode is 30 seconds (abnormality detection level value). It corresponds to AL3).

In the call mode, a signal abnormality is not detected, but the call time is measured and the measured time is 30 seconds.
When it exceeds the second, it is judged to be abnormal (described later). As described in the prior art, this judgment is made by using this communication line for a call in a system in which the same communication dedicated line is switched to either the data communication mode or the call mode. Is almost never.

Here, the abnormality detection processing in the call mode and the abnormality detection processing when switching from the call mode to the data communication mode will be described with reference to the timing charts of FIGS. 1 and 2. Note that the abnormality detection processing in the data communication mode has been described above, and will be omitted.

First, the abnormality detection process in the call mode will be described. When the own station switches from the data communication mode to the call mode, the line circuit switching circuit 1 causes the communication abnormality control unit 11
This is notified to the abnormality detection level selection unit 30.
The communication abnormality control unit 11 stops outputting a signal for initializing the integration of the data abnormality time counting unit 12 from this time.
Therefore, the data abnormal time counting unit 12 continues to accumulate the voltage value of the clock of the clock transmitting unit 13 until the data communication mode is switched again. The comparison circuit 14 includes an integrated voltage value of the data abnormality time counting unit 12 and an abnormality detection level selection unit 30.
The abnormality detection level value AL2 input from is compared, and if the integrated voltage value is larger, that is, when the communication mode time of the own station exceeds 5 minutes, it is determined as an abnormality and the abnormality output circuit 1
5 is output abnormally. In FIG. 2, the call mode time is 5
No error is output because the local station is switched to the data communication mode before the minutes have passed.

Next, the abnormality detection processing when switching from the call mode to the data communication mode will be described. When the local station switches from the call mode to data, the line circuit switching circuit 1 notifies the communication abnormality control unit 11 and the abnormality detection level selection unit 30 of this. The communication abnormality control unit 11 first outputs a signal for initializing the accumulated voltage value of the data abnormality time counting unit 12 up to this point, and from this time starts determining whether or not the data input from the receiving circuit is normal. If the input data is normal, a signal for initializing the integrated voltage value of the abnormal data time counting section 12 is output. The comparison circuit 14 compares the integrated voltage value of the data abnormality time counting unit 12 with the abnormality detection level value AL3 input from the abnormality detection level selection unit 30.
If the integrated voltage value is larger, that is, if normal data is not received from the partner station within 30 seconds after switching from the call mode to the data communication mode,
It is determined that there is an abnormality and the abnormality output circuit 15 is caused to output an abnormality. Figure 2
A timing chart in the case where normal data is not received even after 30 seconds have passed since the self station was switched to the data communication mode is shown.

The abnormality output circuit 1 is provided for each abnormality detection type.
The output signal from 5 may be divided to divide the abnormality notification.

Next, another embodiment according to the present invention will be described with reference to the block diagram of FIG.

The present embodiment does not judge each diagnosis time by changing the abnormal level detection value, but
The determination is made by changing the number of clocks to be integrated by the data abnormal time counting section 12. As shown in the figure, a clock transmission unit 1 for transmitting a clock having a frequency corresponding to each diagnostic time when switching from a data communication mode, a call mode and a call mode to a data communication mode.
Each of 3a, 13b and 13c is connected to the data abnormal time counting section 12 via the clock transmission selecting section 130. The clock transmission selection unit 130 uses the line switching circuit 1
The signals from the clock generators 13a, 13b, 1
Input any one of 3c to the data abnormal time counting section 12. In this way, since the frequency of the clock transmitted from the clock transmission unit is changed, only one abnormality detection level is input to the comparison circuit 14. FIG. 4 shows a timing chart in the case where normal data is not received even after 30 seconds have elapsed since the own station was switched to the data communication mode.

As described above, the abnormality can be detected not only in the data communication mode but also in the call mode and when the call mode is switched to the data communication mode. Further, by changing each abnormality detection level or the frequency of the clock. It is possible to arbitrarily change the accuracy of abnormality detection.

Still another embodiment will be described with reference to FIGS. 5 and 6. In this embodiment, when the own station is in the call mode, the switching failure of the own station or the partner station is detected, and if the state of the switching failure continues, the mode of the own station is switched to the data communication mode.

In FIG. 5, an automatic switching unit 40 is newly connected to the communication line C, the line switching circuit 1, the communication abnormality control unit 11, and the abnormality detection level selection unit 30. Automatic switching unit 4
0 integrates the carrier signal detection unit 401 that detects the carrier signal on the communication line C and the time when the carrier signal is detected. When the integrated time exceeds a predetermined time, the line switching unit 1 It is composed of a line switching time determination unit 402 that switches modes.

First, let us consider a case in which, when the own station switches from the data communication mode to the call mode (time t1 in FIG. 6), the other station remains in the call mode due to inadequate switching of the other station. The carrier signal is received by the carrier detection unit 401 because the partner station is in the call mode. The detection unit 401 indicates that the carrier signal has been received by the line switching time determination unit 4
02 and the abnormality detection level selection unit 30. The line switching time determination unit 402 measures the time during which the carrier signal is received, and switches the line switching unit 1 to the data communication mode when a predetermined switching time, for example, 30 seconds has elapsed. The switching level value corresponds to this predetermined time. In this case, since the partner station has switched to the call mode before the switching time has elapsed since the carrier signal was detected, the switching has not occurred on the local station side (time t2 in FIG. 6). If switching at the local station is unnecessary, for example, when performing a test, the line switching time determination unit 402 may be turned off in advance.

Next, let us consider a case in which when the partner station switches from the call mode to the data communication mode (time t3 in FIG. 6), the own station forgets to switch and the station remains in the talk mode.

In this case, since the carrier signal is sent from the partner station even though the own station has been in the call mode for a long time, the carrier detection unit 401 judges that the carrier signal has been received by the line switching time. The information is transmitted to the unit 402 and the abnormality detection level selection unit 30. Line switching time determination unit 40
In 2, the time for receiving the carrier signal is measured, and the line switching unit 1 is switched to the data communication mode when the switching time, for example, 30 seconds has elapsed. In FIG. 4, the carrier signal is sent from the partner station even after 30 seconds have elapsed since the carrier signal was detected, so the local station switches to the data communication mode (time t4 in FIG. 6). Defective switching can be quickly detected depending on the presence or absence of a carrier signal, and the local station can switch to another mode.

Still another embodiment is shown in FIGS. 7 and 8.

As shown in FIG. 7, in this embodiment, the abnormality detection levels when the own station is in the call mode are AL2a and AL2.
The abnormality detection is performed with two of 2b. The abnormality detection level AL2a corresponds to the diagnosis time when the own station switches from the data communication mode to the call mode, as in the above-described embodiment, and the diagnosis time is set to 5 minutes, for example. The abnormality detection level AL2b is an abnormality detection level value when only the partner station switches to the data communication mode after both the own station and the partner station are connected in the call mode, and the corresponding diagnosis time is, for example, It is set to 30 seconds. As shown in FIG. 8, when the local station is switched to the call mode, the abnormality detection level selection unit 16 selects AL2a as the abnormality detection level by the signal from the line switching circuit 1 (time t1 in FIG. 8). After that, when only the partner station switches to the data communication mode, the abnormality detection level selection unit 16 selects AL2b as the abnormality detection level by the carrier signal detection for detecting the carrier signal (time t3 in FIG. 8).

Further, although not shown here, AL1 and AL are set as the abnormality detection level values similarly to those described in FIG.
It is also possible to detect abnormality by setting the oscillation frequencies of the clock oscillator to four, without dividing into 2a, AL2b and AL3.

As described above, the function of switching the mode when the own station is in the call mode and the function of detecting various abnormalities may be combined.

Finally, as shown in FIG. 9, in the embodiment described above, the carrier signal on the communication line C is detected to identify the mode of the partner station, and the received data itself (not the voice signal) is recognized. By doing so, the mode of the partner station is identified. In this embodiment, the data abnormality judging section 11 judges the data on the communication line C via the newly provided modulator / demodulator 2 and the receiving circuit 3, and if the switching level value is exceeded, the mode of its own station is switched.

In addition, the abnormality detection level is not a single one according to each diagnostic mode, and may be, for example, a light failure / major failure, data communication mode / speech mode switching (consistency) alarm / abnormality,
A method may be adopted in which two or more types of abnormality detection levels are provided according to each diagnostic mode such as alarm / line abnormality of the communication line, and an abnormality is output when each abnormality detection level is reached. That is, it is possible to make a detailed diagnosis and output method according to the intended use, and to make an accurate announcement by, for example, lamp output / bell or buzzer sound.

[0032]

According to the present invention, there is provided a data transmission / reception monitoring device capable of flexibly detecting an abnormality not only when the local station is in the data communication mode but also when in the call mode and when the call mode is switched to the data communication mode. can do.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a data transmitting / receiving apparatus according to the present invention.

FIG. 2 is a timing chart showing the operation of the embodiment according to the present invention.

FIG. 3 is a block diagram showing another embodiment according to the present invention.

FIG. 4 is a timing chart showing the operation of another embodiment according to the present invention.

FIG. 5 is a block diagram showing still another embodiment according to the present invention.

FIG. 6 is a timing chart showing the operation of still another embodiment according to the present invention.

FIG. 7 is a block diagram showing still another embodiment according to the present invention.

FIG. 8 is a timing chart showing the operation of still another embodiment according to the present invention.

FIG. 9 is a block diagram showing still another embodiment according to the present invention.

FIG. 10 is a block diagram showing an example of a conventional technique.

FIG. 11 is a block diagram showing an embodiment according to a conventional technique.

FIG. 12 is a timing chart showing the operation of the embodiment according to the related art.

[Explanation of symbols]

 1 Line Switching Circuit 2 Modulator / Demodulator 3 Reception Circuit 11 Data Abnormality Judgment Unit 12 Data Abnormality Time Counting Unit 13, 13a, 13b, 13c Clock Transmission Unit 14 Comparison Circuit 15 Abnormality Output Circuit 16 Abnormality Detection Level Selection Unit 130 Clock Transmission Selection Unit 40 Automatic switching unit 401 Carrier signal detection unit 402 Line switching time determination unit

Claims (3)

[Claims] 1. A data transmission / reception monitoring control device for monitoring and controlling a data transmission / reception device used for data communication or a call by switching the same dedicated communication line to either a data communication mode or a call mode. In the communication mode, a data abnormality determination unit that determines whether the data received from the communication dedicated line is abnormal, a data abnormality time counting unit that counts the time when the abnormal data is received, and the counted time. In a data transmission / reception monitoring and control device equipped with a comparison unit that detects a communication error by comparing with a predetermined error detection time and an error output unit that outputs an error when a communication error occurs, when the own station is in a call mode and Equipped with an abnormality detection level selection unit that selects the abnormality detection time corresponding to each time the station is switched from the call mode to the data communication mode and outputs it to the comparison circuit The data abnormal time counting unit counts the time when the own station is in the call mode when the own station is in the call mode, and when the own station is switched from the call mode to the data communication mode, the own station changes the data communication from the call mode. A data transmission / reception monitoring and control device, which counts the time from when the mode is switched to when normal data is received. 2. An abnormal signal detection unit for detecting a carrier signal from the dedicated communication line when the own station is in a call mode,
A line switching time determination unit for counting the time during which the carrier signal is detected and switching the own station to the data communication mode when the counted time exceeds a predetermined switching time. Item 1. A data transmission / reception monitoring and control device according to Item 1. 3. A signal detecting section for detecting a data signal from the dedicated communication line and a time during which the data signal is detected when the local station is in a call mode, and the counting time is a predetermined switching time. 2. The data transmission / reception monitoring and control apparatus according to claim 1, further comprising a line switching time determination unit that switches its own station to a data communication mode when it exceeds the limit.