JP2001222784A - Monitoring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To specify an abnormal communication channel when the abnormality happens and also to display only an absolute minimum alarm in a monitoring system where the signals received from plural terminal devices are multiplexed and received by a single monitoring device. SOLUTION: A communication controller 4 configuring this monitoring system includes plural multiplexing means 41 which output the cutoff indication signals including logical channel numbers for identifying a communication channel when this channel is cut from a terminal device 11 and a communication control part 45 which previously stores one or plural logical channel numbers in response to each means 41, decides the abnormality has occurred on the communication channel set between a communication network and a means 41 when the cutoff indication signals including logical channel numbers are inputted about all logical channel numbers stored in response to the relevant means 41 within a prescribed time after the cutoff indication signal is inputted from the means 41 and then outputs a cutoff alarm including the channel number for identifying the means 41 to a monitoring device. The monitoring device 5 notifies the channel number that is included at least in the cutoff alarm when this alarm is inputted from the part 45.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a monitoring system, and more particularly to a monitoring system in which signals from a plurality of terminal devices are multiplexed and received by one monitoring device.

[0002]

2. Description of the Related Art For example, in the conventional monitoring system shown in FIG. 4, a sensor (not shown) is arranged in a monitoring area, and when an abnormality such as a fire or intrusion occurring in the monitoring area is detected by this sensor. And a communication network (for example, IS
(DN network).

Each of the terminal devices 11 to 15 includes a terminal device 11,
12 is a line connecting device 31, terminal devices 13 and 14 are a line connecting device 32, and terminal device 15 is a line connecting device 3
3 are always multiplex-connected.

[0004] The alarms transmitted from each of the terminal devices 11 to 15 are multiplexed in an ISDN network and are sent to the line connection devices 31 to 3.
3 and transmitted to the monitoring device 5 via the communication control device 4. When the monitoring device receives an alarm from each of the terminal devices 11 to 15, the monitoring device notifies the monitoring person at the monitoring center of the occurrence of the abnormality by the notification device 6 (for example, a monitor).

[0005] As described above, in the above-mentioned conventional monitoring system, by multiplexing the communication lines between the communication network and the monitoring device, many communication lines are not laid on the monitoring device side.
An alert from a plurality of terminal devices can be received.

[0006]

In the above-mentioned conventional monitoring system, the communication control device 4 usually has the terminal devices 11 to 11 connected thereto.
When a communication path set between the terminal device and the terminal device is disconnected, a disconnection alarm indicating that the communication path with the terminal device has been disconnected is output to the monitoring device 5. The monitoring device 5 to which the disconnection alarm has been input notifies the monitoring person at the monitoring center that the communication path with the terminal device has been disconnected by the monitor serving as the notification device 6.

However, for example, the line connection device 31
Is broken, or if an abnormality occurs in any communication line between the communication control device 4 and the line connection device 31 and the communication network, all the terminal devices 11 and 12 connected to the line connection device 31 The communication path set during is disconnected.

In this case, the monitoring device 5 is connected to the line connection device 3
It is determined that the communication lines between all the terminal devices 11 and 12 connected to 1 have been disconnected, and the disconnection of the lines for each of the terminal devices 11 and 12 is displayed on a monitor and individually notified.

For this reason, when the number of terminal devices connected to each line connection device increases, the notification device 6 notifies the disconnection of the communication path with each terminal device connected to the line connection device 31.
When all are displayed on the monitor, the other line connection device 3
Even if a highly urgent warning such as a fire or intrusion is received from the terminal devices 13 to 15 connected to the device 2, 33, the warning cannot be displayed on the monitor and the reception of the warning cannot be reliably notified. There was a problem.

[0010] The present invention has been made in view of the above points, and when an abnormality occurs in a multiplexed communication line of a monitoring device, only a minimum necessary alarm is displayed to provide an emergency. It is an object of the present invention to provide a highly reliable monitoring system by preventing delay in finding alarms related to highly likely fire or intrusion and automatically restoring communication lines.

[0011]

In order to solve the above-mentioned problems, the invention according to claim 1 multiplexes a plurality of terminal devices transmitting various kinds of information as packet signals and a packet signal transmitted from the terminal devices. A communication network for converting and transmitting
A communication control device that outputs various information based on the packet signal when receiving a multiplexed packet signal in the communication network, and a monitor that notifies at least the input information when various information is input from the communication control device A communication system that outputs a disconnection instruction signal containing a logical channel number for identifying the communication line when the communication line with the terminal device is disconnected. Multiplexing means and one corresponding to each multiplexing means.
Alternatively, a plurality of logical channel numbers are stored in advance, and each logical channel number is stored for all logical channel numbers stored corresponding to the multiplexing unit within a predetermined time after the disconnection instruction signal is input from the multiplexing unit. When the disconnection instruction signal including the multiplexing means is input, it is determined that an abnormality has occurred in the communication line between the communication network and the multiplexing means, and a disconnection alarm including a line number for identifying the multiplexing means is sent to the monitoring device. A communication control unit for outputting, and when the disconnection alarm is input from the communication control unit, the monitoring device notifies at least a line number included in the disconnection alarm.

According to a second aspect of the present invention, in the monitoring system according to the first aspect, the communication control unit determines that an abnormality has occurred in a communication line between the communication network and the multiplexing unit. In this case, after performing the release operation of the communication line to which all the logical channel numbers stored corresponding to the multiplexing means are assigned, all the logical channels stored corresponding to the multiplexing means are performed. A connection operation of a communication line to which a number is assigned is performed.

According to a third aspect of the present invention, in the monitoring system according to the second aspect, the communication control unit is provided with all the logical channel numbers stored corresponding to the multiplexing means. When at least one communication line is connected as a result of performing the connection operation of the communication line, a recovery signal including a line number for identifying the multiplexing unit is output to the monitoring device, and the monitoring device When a restoration signal is input from the communication control unit, at least a line number included in the restoration signal is reported.

According to a fourth aspect of the present invention, in the monitoring system according to the second or third aspect, the communication control unit preliminarily stores identification information of a terminal device corresponding to each logical channel number. If, as a result of performing the connection operation of the communication lines assigned with all the logical channel numbers stored corresponding to the multiplexing means a predetermined number of times, at least one communication line could not be connected, the connection could not be established. A disconnection alarm including the identification information of the terminal device corresponding to the logical channel number is output to the monitoring device, and the monitoring device reports at least the identification information included in the disconnection alarm when the disconnection alarm is input from the communication control unit. It is characterized by:

According to the present invention, when an abnormality occurs in the communication line between the communication network and the multiplexing means of the communication control device, the abnormality is determined as an abnormality of the communication line, and the communication line is connected to the communication line. It is possible to eliminate the inconvenience caused by handling as an alarm from all of the terminal devices.

If an abnormality occurs in the communication line between the communication network and the communication control device, all communication lines to which the logical channel numbers stored corresponding to the multiplexing means are assigned are opened. By reconnecting, the communication line can be automatically repaired.

Further, when at least one communication line is connected as a result of the reconnection, the monitoring device can output a restoration signal including a line number to grasp the state of restoration of the communication line on the monitoring device side. It becomes possible.

If at least one communication line cannot be connected as a result of the connection operation, the communication control unit disconnects the terminal device identification information corresponding to the logical channel number that could not be connected to the monitoring device. By notifying the alarm, it is possible to grasp the abnormality of the communication line of the specific terminal.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a monitoring system using a communication control device according to the present invention will be described below with reference to the drawings.

<Configuration> FIG. 1 shows a block diagram of a monitoring system using the communication control device of the present invention. In the figure, terminal devices 11 to 1n are arranged in a monitoring area, and when a detection signal output from a sensor (not shown) is input when detecting the presence of a person or the occurrence of a fire in the monitoring area, When the operation mode is the security mode, information indicating the type of abnormality corresponding to the detection signal and an alarm including the identification information of the terminal devices 11 to 1n include a signal such as signal type information, a logical channel number, and a transmission sequence number. An alarm packet to which a header including information necessary for transmission of the alarm packet is added is transmitted to the ISDN 2.

The ISDN network 2 uses an empty line to transmit a signal received from the line connection device 31 to 31n to the terminal device 11.
To 1n, and the received signals from the terminal devices 11 to 1n are transmitted to the line connection devices 31 to 3n. When each received signal is transmitted to the other party, the signals are rearranged based on the transmission order number included in the header, and then transmitted to the other party. Also, the terminal devices 11 to 1n and the line connection devices 31 to 3
When an error occurs in the communication line between the terminal device 11
1 to 1n and the line connection devices 31 to 3n, and transmits a disconnection instruction packet including information such as the reason why communication is disabled (disconnection reason) and the logical channel number of the disconnected communication line.

The line connection devices 31 to 3n are branch points of wiring between the ISDN network and the monitoring center of the security company, etc., and are installed in the monitoring center of the security company or the like. Input signal from ISDN
The signal is transmitted to the network 2 and the received signal from the ISDN 2 is supplied to the multiplexing means 411 to 41n constituting the communication control device 4.

The communication control device 4 is arranged at a monitoring center such as a security company, and includes multiplexing means 411 to 41n, a timer 4
2, a counter 43, a storage unit 44, and a communication control unit 45.

Upon receiving a signal from the communication control unit 45, the multiplexing means 411 to 41n add a header including information necessary for signal transmission such as signal type information, a logical channel number, and a transmission sequence number. The input signal is sent to the line connection device 31
~ 3n. Further, when an alarm packet from the line connection device 31 to 3n is input, an alarm included in the alarm packet is output to the communication control unit 45. Further, when disconnection instruction packets are input from the line connection devices 31 to 3n, a disconnection instruction signal including a logical channel number for identifying the disconnected communication line is output to the communication control unit 45.

The timer 42 is started when a start signal is input from the communication control unit 45, and outputs a time-out signal to the communication control unit 45 when a predetermined time is counted. When a reset signal is input from the communication control unit 45, the timer stops counting and resets.

When the count signal from the communication control unit 45 is input, the counter 43 adds 1 to the stored count value.
Is added, and when a reset signal is input, the count value is reset to an initial value (here, 0).

The storage unit 44 stores in advance line information for each of the terminal devices 11 to 1n (identification information given to each of the terminal devices 11 to 1n in advance, a line number given to each of the multiplexing means 411 to 41n, a telephone number, Number, line connection status, etc.).

The communication control unit 45 includes multiplexing means 411 to 4
When an alarm from 1n is input, the alarm is output to the monitoring device 5.

When a disconnection instruction signal from the multiplexing means 411 to 41n is input, an activation signal is output to the timer 42 and included in the disconnection instruction signal based on the line information stored in the storage unit 44. When disconnection instruction signals are input for all logical channel numbers corresponding to the same line number as the line number corresponding to the logical channel number, it is determined that the multiplexed communication line from the ISDN network to the multiplexing means 411 to 41n is abnormal. Judgment is made, and a disconnection alarm including the information indicating the abnormality of the communication line and the line number is output to the monitoring device 5. Then, based on the line information stored in the storage unit 44, after performing an opening operation of the communication lines with all the terminal devices 11 to 1n corresponding to the line numbers, the terminal devices 11 to 11n are again operated.
1n is connected to the communication line. As a result, when a communication line with at least one terminal device is connected, the information indicating that the communication line is connected and a recovery signal including the line number are output to the monitoring device 5. At this time, if there is a terminal device to which the communication line could not be connected, the counter 4
If the count value of No. 3 has not reached the predetermined value (here, 2), a count signal is output to the counter 43, and after the communication line with the terminal device is opened, the terminal device and the terminal device are re-connected. The connection operation of the communication line is performed.
If the count value of the counter 43 has reached the predetermined value, the monitoring unit 5 outputs a disconnection alarm including identification information of the terminal device to which the line cannot be connected and information indicating that the line could not be connected.

Note that, based on the line information stored in the storage unit 44, disconnection instructions are issued for all logical channel numbers corresponding to the same line numbers as the logical channel numbers included in the disconnection instruction signal. If the signal is not input, it is determined that the communication line from the terminal devices 11 to 1n to the ISDN network is abnormal, and the disconnection alarm including the information indicating the communication line abnormality and the identification number of the terminal device is monitored.
Output to Then, based on the line information stored in the storage unit 44, after performing an opening operation of the communication line with the terminal devices 11 to 1n, a connection operation of the communication line with the terminal devices 11 to 1n is performed again. Do. As a result, when a communication line with the terminal device is connected, a recovery signal including information indicating that the communication line is connected and identification information of the terminal device is output to the monitoring device 5. At this time, if the communication line cannot be connected, if the count value of the counter 43 has not reached a predetermined value (here, 2), a count signal is output to the counter 43 and communication with the terminal device concerned is performed. After performing the line release operation, the communication line connection operation with the terminal device is performed again.

The monitoring device 5 is arranged at a monitoring center such as a security company and includes a control unit 51 and a storage unit 52.

When an alarm from the communication control unit 45 of the communication control unit 4 is input, the control unit 51 stores the information stored in the storage unit 52 based on the identification information of the terminal devices 11 to 1n included in the alarm. The individual information of the terminal devices 11 to 1n is read, and the individual information and information indicating the type of abnormality included in the alarm are output to the notification device 6. In addition, when a disconnection alarm is input from the communication control unit 45, the line number included in the disconnection alarm and information indicating an abnormality of the communication line are output to the notification device 6. Further, when the recovery signal is input from the communication control unit 45, the communication unit 45 outputs to the notification device 6 the line number included in the recovery signal and information indicating that the communication line is connected.

The storage section 52 stores in advance individual information of the monitored area (identification information, name, address, telephone number, map information, etc., which are given in advance for each of the terminal devices 11 to 1n).

The notification device 6 receives information from the control unit 52 of the monitoring device 5 indicating the type of alarm and the abnormality or connection of the communication line.
When the individual information and the line number are supplied, the input signal is notified by voice or display.

<Operation> Next, the operation of the monitoring system shown in FIG. 1 will be described with reference to the operation flowcharts of FIGS. FIG. 2 is an operation flowchart of the communication control device 4, and FIG. 3 is an operation flowchart of the monitoring device 5. 1. Detection of abnormality in the monitoring area For example, when a window of the monitoring area is opened by an intruder, the sensor detects the opening of the window, and the sensor detects terminal devices 11 to 11.
1n, a detection signal is output. Terminal devices 31 to 3
n is the information indicating the type of abnormality based on the detection signal when the detection signal from the sensor is input and the operation mode is the security mode, and the identification information previously assigned to each of the terminal devices 31 to 3n. Is transmitted to the ISDN 2 with a header including information necessary for data transfer such as a logical channel number and a data transmission sequence number.

When receiving the alarm packet, the ISDN network 2 sends the alarm packet to the line connection devices 31 to 31n corresponding to the multiplexing means 411 to 41n of the communication control device 4 as the transmission destination based on the logical channel number included in the header. The alarm packet is transmitted to the server.

When receiving the alarm packet from the ISDN, the line connection devices 31 to 3n output the alarm packet to the multiplexing means 411 to 41n of the communication control device 4.

Multiplexing means 411 to 41 of communication control device 4
When the alarm packet is supplied, n outputs an alarm included in the alarm packet to the communication control unit 45.

The communication control unit 45 comprises multiplexing means 411 to 4
When an alarm from 1n is input, the alarm is output to the monitoring device 5.

When an alarm from the communication control unit 45 of the communication control unit 4 is input, the control unit 51 of the monitoring device 5 stores the alarm in the storage unit 52 based on the identification information of the terminal devices 11 to 1n included in the alarm. The stored individual information of the terminal devices 11 to 1n is read, and the read individual information and information indicating the type of abnormality included in the received alarm are output to the notification device 6.

When the individual information of the terminal devices 11 to 1n and the information indicating the type of abnormality output from the control unit 51 of the monitoring device 5 are input, the notification device 6 receives the terminal devices 11 to 1n.
The type of the abnormality and the like are notified to the supervisor of the monitoring center by voice or text together with the n individual information (address, telephone number, etc.).
2. Detection of line disconnection (terminal side disconnection) Terminal devices 11 to 1n break down, or the exchanges that constitute the ISDN network or the communication line connecting the exchanges are disconnected for some reason after setting the communication path. In this case, the ISDN network 2 transmits a disconnection instruction packet including the reason (communication reason) that communication with the line connection devices 31 to 3n installed in the monitoring center is disabled (reason for disconnection) and the logical channel numbers of the terminal devices 11 to 1n. Send.

For example, if an error occurs in the communication line between the terminal device 11 and the ISDN network 2 and this communication path is disconnected, the line connection device (communication path) to which the communication path with the terminal device 11 is set is set. Here, a disconnection instruction packet including the reason for disconnection and the logical channel number of the terminal device 11 is transmitted from the ISDN network 2 to the line connection device 31).

When receiving the disconnection instruction packet, the line connection device 31 outputs the disconnection instruction packet to the multiplexing means 411 of the communication control device 4.

When a disconnection instruction packet is input from the line connection device 31 (S101), the multiplexing means 411 performs communication control on the disconnection instruction signal containing the disconnection reason and the logical channel number of the terminal device 11 included in the disconnection instruction packet. Output to the unit 45.

When the disconnection instruction signal from the multiplexing means 411 is input, the communication control unit 45 of the communication control device 4 outputs an activation signal to the timer 42 (S102) and checks whether a new disconnection instruction signal is input. Determine whether or not. At this time, when a new disconnection instruction signal is input, the line information of the terminal device 31 stored in the storage unit 44 is read based on the logical channel number included in the previously input disconnection instruction signal, and this read is performed. It is determined whether or not disconnection instruction signals have been received from all terminal devices having the same line number as the line number included in the line information (S103).

The timer 42 is activated when an activation signal is input from the communication control unit 45, measures a predetermined time (here, 10 seconds), and after 10 seconds, the communication control unit 4
In response to 5, a time-out signal is output.

In step 103, the communication control unit 45 of the communication control unit 4 determines whether a new disconnection instruction signal has not been input or a disconnection instruction signal has not been input from all terminal devices having the same line number. When the end of time measurement is input from the timer 42 (S120), the line information of the terminal device 11 stored in the storage unit 44 is read based on the logical channel number included in the disconnection instruction signal,
The disconnection alarm including the identification information of the terminal device 11 included in the read line information and the disconnection reason included in the disconnection instruction signal is output to the control unit 51 of the monitoring device 5 (S121).
Further, a disconnection confirmation packet indicating that the line opening operation is to be started is output to the line connection device 31 via the multiplexing means 411, and the communication path opening operation is performed (S122).

When a disconnection alarm is input (S201), the control unit 52 of the monitoring device 5 stores the terminal device 11 stored in the storage unit 52 based on the identification information of the terminal device 11 included in the disconnection alarm. And outputs the read individual information and the supplied disconnection reason to the notification device 6.
(S203).

When the individual information of the terminal device 11 and the reason for the disconnection are supplied, the notifying device 6 reports the occurrence of an abnormality in the communication line with the terminal device 11 together with the individual information such as the address of the monitored area and the telephone number. The monitoring center is notified by voice or text.

When the communication control unit 45 of the communication control unit 4 completes the operation of opening the communication path in step 122,
The operation of restoring the communication path setting with the terminal device 11 (connection of the communication line) is performed (S123).

The communication control section 45 of the communication control device 4 outputs a connection command signal to the multiplexing means 411 in order to start setting a communication path with the terminal device 11. The procedure for setting a communication path will be described below.

When a connection command signal is input from the communication control unit 45, the multiplexing means 411 first receives the CCITT Recommendation Q.1 which defines a subscriber protocol in packet communication. 9
The communication path setting packet, which is the D channel information for call setting, is supplied to the line connection device 31 based on 31. In this case, the data communication mode to be implemented after the communication path is set is described in the SAPI of the communication path setting packet in the layer 2 in CCITT Recommendation X.264. “16” indicating that the communication is a D-channel packet communication based on C.25 is set.

The line connection device 31 transmits the communication path setting packet from the multiplexing means 411 via the communication line to the ISDN
Send to network 2. Upon receiving this communication path setting packet, the ISDN network 2 terminates the layer 2 and checks the SAPI of the received communication path setting packet.
Since PI = 16, it is determined that the requested data communication mode is the D-channel packet communication mode, and a setting confirmation packet indicating that the communication path setting packet has been received is returned to the line connection device 31. The line connection device 31 supplies the received setting confirmation packet to the multiplexing means 411 of the communication control device 4.

The multiplexing means 411 of the communication control device 4 receives the setting confirmation packet from the line connection device 31,
It determines that a communication path has been established with the line connection device 31, and outputs a call request packet with a header including the telephone number of the terminal device 11 to the line connection device 31. When the call request packet is supplied from the communication control device 4, the line connection device 31 transmits the call request packet to the ISDN 2 via the communication line. Upon receiving the call request packet from the line connection device 31, the ISDN network 2 recognizes the terminal device 11 specified by the telephone number included in the header, and transmits a call setting packet to the terminal device 11. Upon receiving the call setting from the ISDN 2, the terminal device 11 supplies the call setting to the ISDN 2 via a response packet indicating that the communication path can be set. ISDN network 2
Upon receiving a response packet from the terminal device 31, the terminal device returns a communication path setting packet for setting the use channel to the D channel and the communication mode setting to the packet mode to the terminal device 11.

Upon receiving the communication path setting packet from the ISDN 2, the terminal device 11 sets the data communication mode to D.
A channel packet communication mode is set, and a setting confirmation packet indicating that the communication path setting has been received is transmitted to the ISDN 2. Upon receiving the setting confirmation packet from the terminal device 11, the ISDN 2
It determines that a communication path has been set, and transmits an incoming call packet to the terminal device 11.

Upon receiving the incoming packet from the ISDN 2, the terminal device 11 transmits to the ISDN 2 an incoming call accepting packet indicating that the incoming packet has been accepted.

Upon receiving the call accepting packet from the terminal device 31, the ISDN network 2 indicates to the communication control device 4 via the line connection device 31 that the communication path with the terminal device 11 has been set. Send a call completion packet. As a result, a packet communication path is set between the terminal device 11 and the communication control device 4.

Upon receiving the call completion packet from the line connection device (S124), the multiplexing means 411 outputs a call completion signal to the communication control unit 45.

When the call completion signal from the multiplexing means 411 is input, the communication control unit 45 of the communication control device 4 sets (restores) a packet communication path with the terminal device 11 again, and sets a state in which monitoring is possible. Judgment has been made, and this state is maintained. Then, the line information of the terminal device 31 stored in the storage unit 44 is read, and the identification information of the terminal device 31 included in the read line information and the terminal device 3 are read.
A restoration signal including information indicating that the communication path with the communication device 1 has been restored (connected) is output to the control unit 51 of the monitoring device 5 (S13).
0). Further, a reset signal is output to the timer 42 and the counter 43 (S131). The timer 42 and the counter 43 are reset when a reset signal from the communication control unit 45 is input.

The control unit 51 of the monitoring device 5 receives the recovery signal from the communication control unit 45 of the communication control device 4 (S2
05), the terminal device 3 stored in the storage unit 52 based on the identification information of the terminal device 31 included in the restoration signal.
1 and reads out the read individual information and information indicating that the communication path with the terminal device 31 has been set to the notification device 6 (S206).

When the notification device 6 is supplied with the individual information of the terminal device 31 and the information indicating that the communication path with the terminal device 31 has been set, the notification device 6 sends the terminal device together with the individual information such as the address of the monitored area and the telephone number. The fact that a communication path with the communication center 31 has been set, etc., is notified to the supervisor of the monitoring center by voice or text.

When the line connection operation is performed in step 123 and the communication line with the terminal device 11 cannot be connected for some reason (the packet communication path cannot be set), the ISDN network 2 The disconnection instruction packet including the disconnection reason and the logical channel number of the terminal device 11 is transmitted to the connection device 31. When receiving the disconnection instruction packet, the line connection device 31 transmits the disconnection instruction packet to the multiplexing unit 41 of the communication control device 4.
Output to 1.

When the disconnection instruction packet is supplied from the line connection device 31, the multiplexing means 411 of the communication control device 4
(S125), and outputs a disconnection instruction signal to the communication control unit 45. Upon receiving the disconnection instruction signal from the multiplexing unit 411, the communication control unit 45 outputs a disconnection confirmation packet indicating that a communication path opening operation is to be started to the line connection device 31 via the multiplexing unit 411. The communication path is opened (S126), and a count signal is output to the counter 43. Upon receiving the count signal from the communication control unit 45, the counter 43 adds 1 to the stored count value (S127).

When the operation of opening the communication path is completed in step 126, the communication control unit 45 determines whether or not the count value of the counter 43 is a predetermined value (here, 2) (S128). If the value is not 2, the process proceeds to step 123, and the operation of restoring the communication path setting with the terminal device 11 (connection of the communication line) is performed again.

The communication control unit 45 determines in step 128
In the above, the count value of the counter 43 is 2, that is, the operation of setting the communication path with the terminal device 11 is performed twice, but if the communication path with the terminal device 11 cannot be set,
A reset signal is output to the timer 42 and the counter 43
(S129), the process proceeds to step 101.

The timer 42 is reset when a reset signal from the communication control unit 45 is input. When a reset signal is input from the communication control unit 45, the counter 43 returns the count value to an initial value (here, 0).

As described above, when the terminal devices 11 to 1n are out of order, or the exchanges constituting the ISDN network or the communication lines connecting the exchanges are disconnected for some reason after the establishment of the communication path, the communication operation is stopped. It can be grasped as a fault on the line, and a faulty terminal or a disconnected communication line can be specified. 3. Detection of disconnection of line (disconnection of center side line) Line connection device 31 to 3n or line connection device 31 to 3
When the exchange to which n is connected fails or the line between the exchanges constituting the ISDN network and the line connection devices 31 to 3n or between the line connection devices 31 to 3n and the communication control device 4 establishes a communication path, When the connection is cut off for some reason, the multiplexing units 411 to 41n of the communication control device 4 are connected to the reason why communication with the communication control unit 45 is disabled (reason for disconnection) and the multiplexing units 411 to 41n. It outputs a disconnection instruction signal including the logical channel numbers of the terminal devices 11 to 1n.

For example, the line connection device 31 and the ISDN 2
When an error occurs in the communication line between the multiplexing unit 411 and the multiplexing unit 411 connected to the line connection device 31, the multiplexing unit 411 connected to the line connection device 31 Terminal device 11, 1 connected to
A disconnection instruction signal including the logical channel number of No. 2 is output.

Upon receiving the disconnection instruction signal from the multiplexing means 411 (S101), the communication control section 45 outputs a start signal to the timer 42 (S102) and determines whether or not a new disconnection instruction signal has been input. Judge. At this time, when a new disconnection instruction signal is input, the storage unit 44 stores the logical channel number included in the previously input disconnection instruction signal.
And reads the line information of the terminal device 31 stored therein.
It is determined whether or not disconnection instruction signals have been received from all terminal devices having the same line number as the line number included in the read line information (S103).

The timer 42 starts when an activation signal is input from the communication control unit 45, measures a predetermined time (here, 10 seconds), and after 10 seconds elapses, the communication control unit 4
In response to 5, a time-out signal is output.

As described above, the line connection devices 31 to 3n or the exchanges to which the line connection devices 31 to 3n are connected fail or the exchanges constituting the ISDN network are connected to the line connection devices 31 to 3n or the line connection device 31. If the line between the communication control device 4 and the communication control device 4 is disconnected for some reason after the communication path is set, the multiplexing unit 411 sends the communication control unit 45 the reason for disconnection and the connection to the multiplexing unit 411. A disconnection instruction signal including the logical channel numbers of the terminal devices 11 and 12 is output for each logical channel number. That is, the disconnection instruction signals for all the terminal devices 11 and 12 connected to the multiplexing unit 411 are input to the communication control unit 45 in a very short time.

Therefore, the communication control unit 45 of the communication control device 4
Based on the logical channel number included in the disconnection instruction signal and the line information corresponding to the logical channel number stored in the storage unit 44, disconnection instruction signals from all terminal devices having the same line number are It is determined whether or not it has been entered.

In step 103, if disconnection instruction signals from all terminal devices having the same line number have been input, the disconnection instruction signal is stored in the storage unit 44 based on the logical channel number included in the disconnection instruction signal. Among the line information, the disconnection alarm including the line number stored corresponding to the logical channel number and the disconnection reason included in the disconnection instruction signal is output to the control unit 51 of the monitoring device 5 (S104). In addition, a disconnection confirmation packet indicating that the line opening operation is to be started is output to the line connection device 31 via the multiplexing unit 411, and the disconnection confirmation packet is output to all the terminal devices 11 and 12 connected to the multiplexing unit 411. The communication path is released (S10).
5).

On the other hand, when a disconnection alarm is input, the control unit 51 of the monitoring device 5 outputs the line number and disconnection reason included in the disconnection alarm to the notification device 6. When the line number and the reason for the disconnection are input from the control unit 51 of the monitoring device 5, the annunciator 6 generates an error in the communication line between the multiplexing unit 411 and the ISDN network corresponding to the line number and the line number. Notify the monitoring center of the monitoring center by voice or text.

When the communication control unit 45 of the communication control unit 4 completes the operation of opening the communication path in step 105,
Restoration of communication path setting with all terminal devices 11 and 12 connected to the multiplexing means 411 (connection of communication line)
The operation is performed (S106). That is, the multiplexing means 411
When a connection command signal for starting setting of a communication path with the terminal devices 11 and 12 is input from the communication control unit 45, the communication control unit 45 transmits a communication path setting packet to the ISDN network 2 through the line connection device 31, A communication path setting operation with the terminal devices 11 and 12 is performed. Thereafter, a call completion packet indicating that a communication path between the terminal device 11 and the terminal device 12 has been set via the line connection device 31 is received, that is, at least one of the terminal device 11 and the terminal device 12 is received. When the packet communication path is set during the period, an incoming call completion signal is output to the communication control unit 45.

When the call completion signal from the multiplexing means 411 is input, the communication control unit 45 of the communication control device 4 sets (restores) the packet communication path between the terminal device 11 and the terminal device 12 again. A determination is made as to whether or not monitoring is possible, that is, whether or not all terminal devices can be called (S107). If it is determined that monitoring is possible, this state is maintained. At the same time, based on the logical channel number included in the incoming call completion signal,
The line information stored corresponding to the logical channel number is read, and the line numbers included in the read line information and the terminal devices 11 and 12 connected to the multiplexing means 411 corresponding to the line number are read. A recovery signal including information indicating that the communication path has been restored (connected) is output to the control unit 51 of the monitoring device 5 (S112).

When the recovery signal is input (S205), the control unit 51 of the monitoring device 5 checks the line number included in the recovery signal and the multiplexing means 411 corresponding to the line number with the ISDN.
Information indicating that the communication line with the network has been restored is output to the notification device 6 (S206). The notification device 6 includes the monitoring device 5
When the information indicating that the communication line between the multiplexing means 411 and the ISDN network corresponding to the line number has been restored from the control unit 51 of the monitoring center is input, the information is transmitted to the monitoring center by voice or text. Notify the guard.

Thereafter, the communication control unit 45 of the communication control device 4
Is based on the logical channel number included in the incoming call completion signal and the line information corresponding to the logical channel number stored in the storage unit 44. It is determined whether a signal has been input (S113). As a result, incoming call completion signals from all terminal devices having the same line number are input, that is,
All terminal devices 11, 1 connected to the multiplexing means 411
If the communication path with No. 2 has been set, a reset signal is output to the timer 42 and the counter 43 (S114), and the routine proceeds to step 101. The timer 42 is reset when a reset signal from the communication control unit 45 is input. When a reset signal is input from the communication control unit 45, the counter 43 returns the count value to an initial value (here, 0).

In step 113, the logical channel number and storage unit 44 included in the call completion signal
If no call completion signals from all the terminal devices having the same line number have been input based on the line information corresponding to the logical channel number stored in
Proceeding to S15, the operation of opening the communication path with the terminal device to which the call completion signal has not been input is performed, and the count signal is output to the counter 43 (S116).

Next, in step 106, for example,
As a result of performing a communication path setting operation with all the terminal devices 11 and the terminal devices 12 connected to the multiplexing means 411,
When the communication path with the terminal device 11 can be set, but the communication path with the terminal device 12 cannot be set, the multiplexing means 411 of the communication control device 4 transmits the signal from the line connection device 31 to the terminal device 12. A disconnection instruction packet including a logical channel number is input. Upon receiving the disconnection instruction packet, the multiplexing unit 411 outputs a disconnection instruction signal to the communication control unit 45.

Upon receiving the disconnection instruction signal from the multiplexing means 411, the communication control section 45 starts opening the communication path with the terminal device 12 to the line connection device 31 via the multiplexing means 411. And outputs a disconnection confirmation packet indicating that
Then, a count signal is output to No. 3 (S115). Counter 43
When a count signal is input from the communication control unit 45,
One is added to the stored count value (S116).

When the operation of opening the communication path with the terminal device 12 ends in step 115, the communication control unit 45
The count value of the counter 43 is a predetermined value (here, 2)
Is determined (S117). If the count value is not 2, the process proceeds to step 106, where the operation of restoring the communication path setting with the terminal device 12 (communication line connection) is performed again.

The communication control unit 45 determines in step 117
In the above, the count value of the counter 43 is 2, that is, the operation of setting the communication path with the terminal device 12 is performed twice, but if the communication path with the terminal device 12 cannot be set, the disconnection instruction signal Based on the included logical channel number and the line information corresponding to the logical channel number stored in the storage unit 44, the identification information of the terminal device 12 stored corresponding to the logical channel number and the disconnection instruction signal Is output to the control unit 51 of the monitoring device 5 (S118), and a reset signal is output to the timer 42 and the counter 43 (S119).
Proceed to step 101. The timer 42 includes a communication control unit 45
Is reset when a reset signal is input. When a reset signal is input from the communication control unit 45, the counter 43 returns the count value to an initial value (here, 0).

When the disconnection alarm is input (S201), the control unit 52 of the monitoring device 5 stores the terminal device 12 stored in the storage unit 52 based on the identification information of the terminal device 12 included in the disconnection alarm. And outputs the read individual information and the supplied disconnection reason to the notification device 6.
(S204). When the individual information of the terminal device 12 and the reason for the disconnection are supplied, the notification device 6 notifies the user of the occurrence of an abnormality in the communication line with the terminal device 12 together with the individual information such as the address and the telephone number of the monitored area by voice or text. To notify the supervisor of the monitoring center.

In step 106 described above, all of the terminal devices 1 connected to the multiplexing means 411
If the communication paths with all the terminal devices 11 and 12 cannot be set as a result of the operation of restoring the communication path setting with the terminal devices 1 and 12 (connection of the communication line), the communication control of the communication control device 4 The unit 45 proceeds to step 108 and proceeds to the multiplexing unit 4
In addition to performing the operation of opening the communication path with all the terminal devices 11 and 12 connected to 11, it outputs a count signal to the counter 43. The counter 43 includes a communication control unit 45
When the count signal from is input, 1 is added to the stored count value (S109).

The communication control unit 45 determines that all of the terminal devices 1 connected to the multiplexing
When the operation of opening the communication paths with the communication paths 1 and 12 is completed, it is determined whether or not the count value of the counter 43 has reached a predetermined value (here, 2) (S110). For example, the process proceeds to step 106, where the operation of restoring the communication path setting (connection of the communication line) with all the terminal devices 11 and 12 connected to the multiplexing means 411 is performed.

The communication control unit 45 determines in step 110
, The count value of the counter 43 is 2, that is, the terminal device 11 connected to the multiplexing unit 411,
The operation of setting the communication path with the terminal device 12 is performed twice, but if the communication path between any of the terminal devices 11 and 12 cannot be set, a reset signal is output to the timer 42 and the counter 43 (S111), and step 101 Proceed to. Timer 42
When a reset signal is input from the communication control unit 45,
Reset. The counter 43 includes a communication control unit 45.
When a reset signal is input from the
(Here, it is assumed to be 0).

As described above, the line connection devices 31 to 3n or the exchanges to which the line connection devices 31 to 3n are connected fail, or the exchange constituting the ISDN network 2 and the line connection devices 31 to 3n or the line connection device Even if the line between 31 to 3n and the communication control device 4 is disconnected for some reason after setting a communication path, these can be recognized as abnormalities on the communication line and reported as a disconnection alarm. Also, the communication line can be restored immediately. Thus, for example, a monitoring center that displays and monitors an alarm from a terminal device can display a minimum necessary alarm, and can quickly restore a communication line.

[0089]

As described above, according to the monitoring system of the present invention, even if any abnormality occurs in the multiplexed communication line of the monitoring device, only a minimum necessary alarm is displayed. This makes it possible to provide a highly reliable monitoring system by preventing delays in finding alarms related to fires and intrusions with high urgency, and automatically restoring communication lines.

[Brief description of the drawings]

FIG. 1 is a block diagram of a monitoring system of the present application.

FIG. 2 is an operation flowchart of the communication control device 4.

FIG. 3 is an operation flowchart of the monitoring device 5.

FIG. 4 is a block diagram of a conventional monitoring system.

[Explanation of symbols]

 11 to 1n Terminal device 2 ISDN network 31 to 3n Line connection device 4 Communication control device 41 to 41n Multiplexing means 42 Timer 43 Counter 44 Storage unit 45 Communication control unit 5 Monitoring device 51 Control unit 52 Storage unit 6 Notification device

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification FI FI Theme Court ゛ (Reference) H04M 11/04 H04L 11/20 102A (72) Inventor Yasuhiko Saito 1-3-9 Moto-Akasaka, Minato-ku, Tokyo No. Ogishi Mabil Sohatsu Electric Industry Co., Ltd. (72) Inventor Katsuyuki Kakura 1-3-9 Moto-Akasaka, Minato-ku, Tokyo Ogishi Mavil Soho Electric Industry Co., Ltd. F-term (reference) 5C087 AA10 AA19 AA37 BB14 BB55 BB74 CC04 DD04 DD05 EE07 FF04 GG07 GG08 GG11 GG19 GG23 GG29 GG30 GG31 GG40 GG46 GG51 GG67 GG70 5K028 AA14 KK01 MM12 MM14 PP04 PP17 QQ02 RR04 SS24 5K030 GA11 HC04 JA01 JT02 LA01 LD13 LE06 MA04 MB03 5

Claims (4)

[Claims] 1. A plurality of terminal devices that transmit various information as packet signals, a communication network that multiplexes and transmits packet signals transmitted from the terminal devices, and a packet signal that is multiplexed in the communication network. A communication control device that outputs various information based on the packet signal when received, and a monitoring device that notifies at least the input information when various information is input from the communication control device, wherein the communication control device A plurality of multiplexing means for outputting a disconnection instruction signal including a logical channel number for identifying the communication line when the communication line with the terminal device is disconnected; One or a plurality of logical channel numbers are stored in advance and stored within a predetermined time after the disconnection instruction signal is input from the multiplexing means, corresponding to the multiplexing means. When a disconnection instruction signal including each logical channel number is input for all the logical channel numbers, it is determined that an abnormality has occurred in the communication line between the communication network and the multiplexing means, and the multiplexing means is identified. And a communication control unit that outputs a disconnection alarm including a line number to a monitoring device, wherein the monitoring device notifies at least a line number included in the disconnection alarm when a disconnection alarm is input from the communication control unit. A monitoring system, characterized in that: 2. When the communication control unit determines that an abnormality has occurred in a communication line between a communication network and a multiplexing unit, all the logical channel numbers stored corresponding to the multiplexing unit are determined. 2. A connection operation of a communication line to which all the logical channel numbers stored corresponding to the multiplexing means are performed after performing an opening operation of the communication line to which the number is assigned. The described monitoring system. 3. The communication control unit performs at least one communication line as a result of performing a connection operation of communication lines to which all logical channel numbers stored corresponding to the multiplexing unit are assigned. And a recovery signal including a line number for identifying the multiplexing means is output to the monitoring device. When the recovery signal is input from the communication control unit, the monitoring device changes at least the line number included in the recovery signal. The monitoring system according to claim 2, wherein the notification is performed. 4. The communication control unit according to claim 1, wherein said communication control unit stores in advance identification information of a terminal device corresponding to each logical channel number, and stores all logical channel numbers stored corresponding to multiplexing means. When at least one communication line cannot be connected as a result of performing the connection operation a predetermined number of times, a disconnection alarm including identification information of a terminal device corresponding to the logical channel number that could not be connected is output to the monitoring device, 4. The monitoring system according to claim 2, wherein the monitoring device notifies at least identification information included in the disconnection alarm when the disconnection alarm is input from the communication control unit.