JPH08335940A - Network monitor system - Google Patents

Abstract

PURPOSE: To surely collect a communication state at a point of time of occurrence of an error of each interface point on each signal line of the communication system by a remote controller. CONSTITUTION: Each of monitors 11-14 sends trigger information to a remote controller 15 managing its own monitor when the number of times of production of log information detected sequentially exceeds a prescribed threshold level and sends monitor information and log information stored to the pertinent remote controller 15 in response to an information transmission command from the remote controller 15. Furthermore, each remote controller 15 has a state memory storing whether itself is an attended state or an unattended state and sends an information transmission command to the pertinent monitor in response to the reception of trigger information from the monitors 11-14 managed by itself and displays the monitor information and the log information received from the monitor. Moreover, when the unattended state is stored in the state memory, the received trigger information is sent to other remote controller 16 decided to be the attended state at all times.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network monitoring system for monitoring the communication status of each signal line of a communication network such as ISDN or packet communication network.

[0002]

2. Description of the Related Art ISDN (Integrated Services Digital Network), packet communication network and the like are communication systems for transmitting a large number of multiplexed data at high speed and efficiently. In such a communication system, the I integrated in the communication network
The SDN exchange is connected to a DSU (line terminating device) installed in the user's house via an ISDN signal line, and this D
A large number of TEs such as telephones, telexes, personal computers, facsimiles, etc.
(Terminal) is connected.

Further, the packet switch in the communication network is connected to the DTE (packet terminal) via the packet signal line and the DCE (data line terminating device). Still another ISDN signal line is connected to an analog TE2 (ISDN non-standard terminal) via a DSU and TA (terminal adapter device) and a modem, which are also installed in the user's house.

Further, in some cases, a normal telephone terminal is connected to the analog exchange through an analog telephone line.

When a communication system having such a configuration is newly constructed or at the time of regular inspection and maintenance, each ISD
In N signal line and packet signal line, disconnection failure of cable, poor contact of connector, switch and DSU
It is necessary to confirm whether or not there is a hardware failure such as an abnormal connection with the DCE or the DCE. Furthermore, it is necessary to measure the line quality such as transmission error over a long period of time and statistically evaluate it.

Conventionally, when such a test is carried out, a connection point between the respective devices in each signal line, that is, S
/ Connect a signal measuring device to each interface point such as T point, R point, etc., monitor the communication status of each point by a cathode ray tube, etc. and analyze the signal waveform or digital value to estimate the position of abnormality occurrence. Was there.

[0007]

However, in the method of installing each of the above-mentioned signal measuring devices at each interface point in the user's house and observing the signal waveform or the measured digital value by the technician resident, There were the following issues.

That is, with respect to an abnormal phenomenon that is constantly occurring, the abnormal phenomenon can be easily specified by a signal waveform or the like,
The cause of the abnormality can be investigated in a relatively short time. But,
Even an engineer who is familiar with this communication system cannot easily reproduce an abnormal phenomenon that occurs one by one, and it takes a lot of time and labor to identify the abnormal phenomenon and investigate the cause of the abnormality.

Further, even if the occurrence of an abnormality is found after a lapse of a certain time after the occurrence, since the communication state at each interface point at the time of occurrence is not stored and retained, it takes a lot of time to investigate the cause of the abnormality phenomenon. Needed.

The present invention has been made in view of the above circumstances. By automatically generating a trigger when log information detected at an interface point on a signal line exceeds a predetermined threshold value, The remote control device can collect the monitor information and log information at the time of trigger occurrence detected by the monitoring device, and the monitor information and log information at the time of this error occurrence can be grasped with certainty, and the cause when an error occurs in each signal line It is an object of the present invention to provide a network monitoring system that enables investigations in a short time.

[0011]

In order to solve the above problems, a network monitoring system of the present invention detects a plurality of monitor information and log information at each interface point on a signal line of a communication network, and stores and holds them. It is composed of a monitoring device and a plurality of remote control devices for collecting monitor information and log information stored and held by each monitoring device under its control.

Further, according to the first aspect of the present invention, the trigger for transmitting the trigger information to each monitoring device is transmitted to the remote control device which controls itself when the number of occurrences of the log information sequentially detected exceeds a predetermined threshold value. Means and information transmitting means for transmitting the monitor information and the log information stored and held in accordance with the information transmission command from the remote control device to the corresponding remote control device are added.

For each remote control device, a status memory that stores whether it is a manned state or an unmanned state, and an information transmission command is sent to the corresponding monitoring device in response to reception of trigger information from the monitoring device under its control. When the unmanned state is stored in the state memory, the received trigger information is always defined as the manned state. Trigger information transfer means for transmitting to another remote control device is added.

Also, in the present invention, a trigger for transmitting trigger information to each monitoring device is transmitted to a remote control device which controls itself when the number of times of occurrence of log information detected sequentially exceeds a predetermined threshold value. Means, information transmission means for transmitting monitor information and log information stored and held in response to an information transmission command from the remote control device to the corresponding remote control device, and in response to a trigger information transfer command from the remote control device, Trigger information retransmitting means for transmitting the trigger information to another remote control device which is always defined as a manned state is added.

For each remote control device, a status memory that stores whether it is a manned state or an unmanned state, and an information transmission command is sent to the corresponding monitoring device in response to reception of trigger information from the monitoring device that it controls. Command transmission means, display output means for displaying and outputting the monitor information and log information received from the monitoring device, and a trigger information transfer command to the monitoring device that is the sender of the trigger information when the unattended state is stored in the state memory. And a transfer command sending means for sending.

[0016]

In the network monitoring system thus constructed, the monitor information and the log information of the interface points are detected at the interface points such as the S / T point and the R point on the signal line of the communication network. A plurality of monitoring devices for storage and storage are connected, and a plurality of remote control devices for collecting monitor information and log information detected by the respective monitoring devices under their control are provided.

Each remote control device is provided with a status memory for storing whether it is an unmanned person or an unmanned person. For example, when there is no observer at night, the unattended state is stored in this state memory. Set. The same applies when the person is absent for a long time.

It should be noted that not all remote control devices are in an unmanned state, a predetermined specific remote control device always has an observer, and a manned state is stored in the state memory.

Then, when the number of times of occurrence of the log information indicating the occurrence of an abnormality exceeds a predetermined threshold value, each monitoring device automatically sends the trigger information to the remote control device which controls itself.

Upon receiving the trigger information from the monitoring device under its control, the remote control device determines that some abnormality has occurred in the signal line, and sends an information transmission command to the corresponding monitoring device.

The monitoring device, which has received the information transmission command from the remote control device which controls itself, sends the monitor information and log information stored and held to the remote control device.

Therefore, the remote control device can grasp the monitor information (protocol information) up to the trigger occurrence time and the log information (abnormality occurrence frequency) up to the trigger occurrence time.

Further, when the self-state memory is in the unmanned state, the received trigger information is transmitted to another remote control device which is always defined as the manned state.

Therefore, even if the remote control device that has received the trigger information is in an unmanned state, this trigger information is transferred to the manned state remote control device, so that the observer can always confirm the occurrence of the trigger. In other words, it is not necessary to assign a supervisor to each monitoring device, and it is not necessary to have a supervisor always stationed for all remote control devices. When the remote control device that has received the trigger information from the monitoring device is unattended, the monitor information and the log information are collected for the time being and the trigger information transfer command is sent to the corresponding monitoring device. As a result, the trigger information is transmitted from the relevant monitoring device to the manned remote control device.

Therefore, the observer can always grasp the trigger occurrence information.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a communication system incorporating the network monitoring system of the embodiment.

The ISDN signal line 2a connected to one ISDN switch in the communication network 1 composed of a large number of ISDN exchanges and a large number of signal lines connecting them to each other is a DSU (provided in the user's house. Circuit termination equipment) 3a. T for this DSU3a
A TE2 (ISDN non-standard terminal) 5 such as a personal computer is connected through an A (terminal adapter device) 4.

Further, the ISDN in the communication network 1
The packet signal line 6 connected to the exchange is connected to a DTE (packet terminal) 8 via a DCE (data line terminating device) 7.
Connected to.

Further, another ISDN signal line 2b is connected to a TE2 (ISDN non-standard terminal) 10 such as a personal computer through a DSU 3b and a TA (terminal adapter device) 4a which are also installed in the user's house.

In the communication system having such a configuration,
The interface between the ISDN exchange and each DSU 3a is composed of a [2B + D] basic interface or a primary group speed interface such as [23B + D] or [24B].

The interface between the DSU 3a and the TA 4, that is, the interface at the S / T point is composed of a basic interface or a primary group speed interface.

Further, the interface between TA4 and TE25, that is, the interface at the R point is, for example, RS-
It is a serial interface such as 232C (V.24 / V.28).

In addition, TE2 such as personal computer
The interface of TA4a capable of performing data communication with respect to V.10 is V.V. according to the V series recommendation of CCITT (International Telegraph and Telephone Consultative Committee) (ITU-T (International Telecommunications Union Telecommunication Standardization Division)). An interface such as 110.

Further, the interface between the DCE 7 and the DTE 8, that is, the interface at the DDX-P point, is a V.V. according to the CCITT V series recommendation. 24
/ V. 28, X. 21 / V. 11, V. 35 and other interfaces.

Then, the ISDN in the communication network 1
DSU (Line Termination Unit) 3a and TA connected to the exchange
The terminal side monitoring device 11 is connected to the S / T point between the (terminal adapter device) 4 and the R point between the TA 4 and the TE 2 (ISDN non-standard terminal) 5. The terminal side monitoring device 11 is connected to the ISDN exchange in the communication network 1 via the DSU 3 and the ISDN signal line 2. Further, the terminal-side monitoring device 11 has a modem 9 and a telephone line 17.
Is connected to an analog exchange in the communication network 1 via.

DCE in the packet signal line 6
(Data circuit-terminating equipment) 7 and DTE (packet terminal) 8
Another terminal-side monitoring device 12 is connected to the DDX-P point between and. The terminal side monitoring device 12 is connected to the ISDN exchange in the communication network 1 via the DSU 3c and the ISDN signal line 2c. Further, the terminal side monitoring device 12 is connected to the analog exchange in the communication network 1 via the modem 9a and the telephone line 17a.

Further, the D connected to the ISDN exchange in the communication network 1 via another ISDN signal line 2b.
SU (line terminating equipment) 3b and V. S between the TA (terminal adapter device) 4a having the 110 interface function
Another terminal side monitoring device 13 is connected to the / T point, the TA2 10 and the TE2 (ISDN non-standard terminal) 10 such as a personal computer. This terminal side monitoring device 13 is D
It is connected to the ISDN exchange in the communication network 1 via the SU 3g and the ISDN signal line 2g. Further, the terminal-side monitoring device 13 uses the modem 9e and the telephone line 17
It is connected to the analog exchange in the communication network 1 via e.

An exchange-side monitoring device 14 is connected to a point V in the ISDN exchange in the communication network 1. The exchange side monitoring device 14 is a DSU 3d and an ISD.
ISD in the communication network 1 via the N signal line 2d
It is connected to the N exchange. Further, the exchange side monitoring device 14 is connected to an analog exchange in the communication network 1 via a modem 9b and a telephone line 17b.

The point V in the exchange of the communication network indicates the interface point between the interface signaling device in the exchange and the subscriber line terminal equipment, and the exchange flowing through the signal line installed in the user's house. It can be regarded as an output point inside.

Further, the DSU is connected to another ISDN signal line 2e connected to the ISDN exchange of the communication network 1.
The remote control device 15 is connected via 3e. Further, the remote control device 15 includes a modem 9c and a telephone line 1.
It is connected to an analog exchange in the communication network 1 via 7c.

Further, the DSU is connected to another ISDN signal line 2f connected to the ISDN exchange of the communication network 1.
Another remote control device 16 is connected via 3f.
The remote control device 16 includes a modem 9d and a telephone line 17d.
Is connected to an analog exchange in the communication network 1 via.

As described above, the monitoring devices 11 to 14 are installed at the respective interface points of the communication system.
Furthermore, a plurality of remote control devices 15 and 16 are incorporated. The monitoring devices 11, 12, 13, and 14 under its control are assigned to the remote control devices 15 and 16 in advance.

In the system of this embodiment, four monitoring devices 11 to 14 are assigned to one remote control device 15. A plurality of other monitoring devices (not shown) are assigned to the other remote control device 16.

Although the remote control devices 15 and 16 have almost the same structure, one remote control device 16 is installed in, for example, a management center of a telephone company, and is constantly monitored by an observer. .

A large number of other remote control devices 15 are installed in, for example, a telephone company's relay station, and are not always monitored by an observer for 24 hours.

FIG. 2 shows S / T points, frame relay line interface reference points (FR points) and R points, DDX-P points,
V. Terminal-side monitoring device 11 for detecting the signal states of 110 points and interface points of V point in the ISDN exchange,
It is a block diagram which shows schematic structure of 12, 13 and the exchange side monitoring apparatus 14.

As shown in FIG. 2, each of the monitoring devices 11 to 14 has an S / S of the same configuration over all the monitoring devices 11 to 14.
The monitoring device main body 20 that detects the communication state at the T point, and each interface point (R point, DDX-P point, V.1) to be monitored.
10 points, V points) and a plurality of adapter devices 21 each having different specifications. Each adapter device 21 is connected to the adapter terminal 21 of the monitoring device body 20.
It is detachably attached to a.

Therefore, when detecting the communication state at the S / T point, the terminal side monitoring device 11 is constructed using only the monitoring device body 20, and when detecting the communication states at the S / T point and the R point, respectively. Monitoring device body 20 and adapter device 21 for R point
Is used to configure the terminal-side monitoring device 11.

When detecting the communication state at the DDX-P point, the terminal side monitoring device 12 is constructed by using the monitoring device main body 20 and the DDX-P point adapter device 21.

In addition, V. When detecting the communication state of 110 points, the monitoring device main body 20 and V. The terminal-side monitoring device 13 is configured by using the adapter device 21 for 110 points.

Further, when detecting the communication state at the V point, the exchange side monitoring device 14 is constructed by using the monitoring device main body 20 and the V point adapter device 21.

The interface reference point (FR point) of the frame relay line indicates a state in which the communication network 1 is performing transmission by the frame relay method of the layers 1 and 2 protocol used for the B channel. Figure 1
Corresponds to the S / T point in. Therefore, when detecting the communication state of the interface reference point of this frame relay line, the terminal side monitoring device 11 using only the monitoring device main body 20 is used.

The interfaces of the R point and DDX-P point are RS-232C and V.V. Since it is a similar serial interface such as 35, each adapter device 21 for R point and DDX-P point is configured by a simple circuit for signal level adjustment, impedance adjustment, and the like. Therefore, DDX
The adapter device 21 for the -P point uses the communication state of the DDX-P point as information equivalent to the communication state of the R point to monitor device main body 20.
Send to.

Since the interface at the V point is the basic interface or the primary group speed interface, T
Close to the point interface. Therefore, the adapter device 21 for the V point converts the communication state of the V point into information equivalent to the communication state of the T point and sends it to the monitoring device body 20.

In addition, V. 110-point interface, that is, V. 1 of CCITT recommendation. In 110, in order to put the signal at the normal R point on the ISDN signal line 2b,
The signal output from the TE 210 of a personal computer or the like is sent to the S / T point via TA 4a.

At this time, in the TA 4a, it is necessary to increase the transmission speed of the personal computer to, for example, the transmission speed of the B channel of the basic interface which is the minimum speed of the ISDN signal line 2b, 64 kbps. On the contrary, it is necessary to reduce the B channel transmission rate of 64 kbps to the transmission rate of the personal computer. This V.3 performed with TA4a. Reference numeral 110 mainly indicates an interface specification for this speed conversion.

Therefore, V. The adapter device 21 for 110 points has an active element for speed conversion such as a logic circuit and a counter inside, and in addition to signal level adjustment and impedance adjustment, the signal speed of the input signal is converted to R point. It is sent to the monitoring device main body 20 as information equivalent to the communication state of.

Further, as shown in the figure, the monitoring device main body 20 includes a basic interface S / T point monitoring unit 22, a primary group velocity interface S / T point monitoring unit 23, and a communication unit 2.
4 and each monitoring unit 2 based on the operation command from the operation unit 25.
2, 23, and a control unit 26 for controlling the operation.

In the basic interface S / T point monitoring section 22, a control section 28, a monitor section 29, a log information detecting section 30, and a trigger generating section 31 are connected to the system bus 27. Further, a monitor information file 32 is connected to the monitor unit 29. A log information file 33 is connected to the log information detection unit 30.

In the monitor information file 32, the S / T point monitor information file 32a for storing the monitor information of the S / T points shown in FIG.
The R point monitor information file 32b that stores the monitor information at the R point in time series with the occurrence time, and the monitor information at the interface reference point (hereinafter abbreviated as FR point) of the frame relay line shown in FIG. An FR point monitor information file 33c that is stored together with the time of occurrence is formed.

In the log information file 33, as shown in FIG.
~ As shown in FIG. 8, each interface point (S / T point,
R point, V.I. Each log information file 33a. Stores the number of times of occurrence of log information detected for each 110 points, FR points). 33
b and 33c are formed.

For example, in the S / T point log information file 33a shown in FIG. 6, "normal noise detection", "INFO"
Items such as "out of sync" are set. Furthermore, a threshold value indicating the allowable generation limit value is set. In addition, this threshold is not set for all items,
It is set only for important items. Each concealment value of each item is the remote control device 15 that controls the monitoring device in advance.
It is set from 16.

The DDX-P point log information conforms to the R point log information, and the V point log information is the T point, that is, S / T.
Follow the points. In addition, V. The log information to be detected at 110 points is V. 110 points are stored in the log information file.

Next, the operation of each unit will be described in order.

The monitor unit 29 monitors the communication state of the signal input from the signal connection terminal 35 connected to the S / T point of the ISDN signal line 2a via the switching contact 34a. Specifically, (a) protocol information of layer 1 of ISDN signal, (b) protocol information of layers 2 and 3 on D channel, (c) protocol information of layers 2 and 3 on B channel are monitored.

When the communication state changes, the change time and the S / T point monitor information file 32a in the monitor information file 32 are written in time series as S / T point monitor information. When the monitor information is written up to the last address of the S / T point monitor information file 32a, the write address returns to the head address. That is,
In this S / T point monitor information file 32a, the latest predetermined number of monitor information is always stored and held together with the generation time.

When the communication network 1 carries out transmission by the frame relay method, the monitor unit 29 regards the S / T point as an FR point, and (a) layer 1 protocol information ( b) Monitor Layer 2 protocol information on the B channel. When the communication state changes, it is written in time series as FR point monitor information in each address of the FR point monitor information file 32c in the monitor information file 32 together with the change time.

The interface reference point is a normal IS.
The S / T point of the DN line or the FR point of the frame relay line is designated by the external control unit 26.

Further, the monitor unit 29 has a switching contact 34.
The monitor information of the communication state of each interface point to which the adapter device 21 is connected, which is input from the adapter device 21 connected to the adapter terminal 21a via b, is written in the monitor information file 32 in time series. .

For example, when the adapter device 21 is an R-point adapter device, that is, when it is the terminal-side monitoring device 11 of FIG. 1, the input R-point monitor information is used as the R-point monitor information in the monitor information file 32. The file 32b is written in the same procedure as described above.

When the adapter device 21 is a DDX-P point adapter device, that is, when it is the terminal side monitoring device 12 of FIG. 1, the input monitor information of the DDX-P point is converted into the R point in the monitor information file 32. Monitor information file 32a
Writing is performed in the same procedure as described above.

If the adapter device 21 is a V. In the case of the adapter device for 110 points, that is, the terminal side monitoring device 13 of FIG.
If the input V. The monitor information of the speed-converted signals of 110 points is written in the R point monitor information file 32b in the monitor information file 32 in the same procedure as described above. In this case, since the signal connection terminal 35 is open, the monitor unit 29 does not monitor the communication state at the S / T point.

When the adapter device 21 is the V-point adapter device, that is, when it is the exchange side monitoring device 14 of FIG. 1, the input V point monitor information is used as the S / T point monitor information in the monitor information file 32. The file 32a is written in the same procedure as described above. In this case, since the signal connection terminal 35 is open, the monitor unit 29 displays the S / T
Do not monitor the communication status of points.

The log information detection unit 30 detects predetermined log information (event occurrence information) of the monitor information of layers 1 and 2 at each interface point detected by the monitor unit 29 and detects each interface point. The number of occurrences of the event is registered in the log information file 33 designated by.

Next, the trigger generator 31 will be described. The "trigger" is for prompting the remote control device 15 which controls each monitoring device 11 to 14 to send a request to send the monitor information and the log information recorded in the monitor information file 32 and the log information file 33. This is a signal to be sent.

Then, the trigger generating unit 31 (a) when the operator discovers a significant abnormality and performs a trigger output operation on the operating unit 25, (b) each log information file 33a of the log information file 33 When the number of times of occurrence of the predesignated log information within 33c exceeds the preset threshold value, a trigger signal is sent to the remote control device 15 which controls the self via the communication unit 24.

The communication section 24 is connected to the ISDN exchange in the communication network 1 through the signal connection terminal 36a and the dedicated ISDN signal lines 2, 2c and 2d. Also,
The communication unit 24 is connected to the external telephone lines 17, 17a, 17b via the connection terminal 36b and also to the local processing terminal 36c to which a personal computer or the like is connected.

Further, the communication unit 24 is an IS to be monitored.
It is connected to the signal connection terminal 35 of the DN signal lines 2a and 2b.

This communication unit 24 is a ISDN signal line 2a, 2b to be monitored or a dedicated ISDN signal line 2, 2c,
2d, 2e, 2f, 2g or telephone line 17, 17a, 1
Remote control device 1 via 7b, 17c, 17d and 17e
Various kinds of information exchange and data transfer are executed with the devices 5 and 16. The operator preliminarily selects and sets which transmission path to use via the operation unit 25.

The control unit 28 is connected to the adapter device 21 on the basis of a command designated by the control unit 26 via the operation unit 25 or a designation by the remote control device 15, 16 via the communication unit 24. The type of the
Instruct to.

The control unit 28 also receives the monitor information stored in the monitor information file 32 and the log information file 33 in response to a transmission request from one remote control device 15 (16) received via the communication unit 24. And a function of transmitting the log information to the remote control device 15 (16) which is the transmission request source. Furthermore, the control unit 28 controls the remote control device 15 (16).
When a monitor stop command is input from the monitor unit 29, the monitor unit 29 is instructed to perform the monitor stop command.

Next, the primary group velocity interface S / T point monitoring unit 23 will be described.

When the interface at the interface point to be monitored is not the above-mentioned basic interface but the primary group velocity interface, the monitor applies a switching command from the operation unit 25 to the control unit 26, and each switching contact 34.
a and 34b are switched and connected to the primary group velocity interface S / T point monitoring unit 23 side.

This primary group velocity interface S / T point monitor 23 is basically the same as the above-mentioned basic interface S / T.
It has almost the same configuration as the T-point monitoring unit 22. And
For the system bus 37, the control unit 38 and the monitor unit 3
9, a log information detection unit 40, and a trigger generation unit 41 are connected. Further, a monitor information file 42 is connected to the monitor unit 39. A log information file 43 is connected to the log information detection unit 40.

Since the primary group speed interface has a high signal transmission speed, the monitor unit 39 uses a plurality of processors in parallel to parallelize the signal states of the signals at the interface points. The monitor information is processed to obtain the monitor information and written in the monitor information file 42. The configurations of the monitor information file 42 and the log information file 43 conform to the configuration of the basic interface S / T point monitoring unit 22 described above.

Therefore, even if the signal transmission rate is 1.54
Even in the communication network 1 which employs a very high primary group interface such as 4 Mbps or 2.048 Mbps, by using the required adapter device 21, each correctly designated interface point (S / T point, R point,
Monitor information and log information of DDX-P point, FR point, V point) and monitor information file 42 and log information file 43
Can be stored in memory.

The control unit 26 switches the switching contacts 34a and 34b to the S / T point monitoring units 22 and 23 of the designated interface in response to the interface selection command input from the operation unit 25 by the monitoring staff. In addition, the monitoring target interface point (S /
The measurement instruction for T point, R point, DDX-P point, FR point, V point) is sent to each interface S / T point monitoring section 22, 23.

FIG. 9 is a schematic configuration diagram of the remote control devices 15 and 16.

In the remote control devices 15 and 16, with respect to the system bus 44, the control unit 45, the ROM 46 for storing various fixed data such as programs, the RAM 47 for storing various variable data, the communication unit 48, the data collecting unit 4 are provided.
9. An operation unit 51 including a CRT display device 51a and a keyboard 51b, a printer 52, etc. are connected.
The data collection unit 49 is also connected to a data file 53 that stores various data such as monitor information and log information collected by the data collection unit 49.

In the RAM 47, a management memory 47a for storing the device numbers and addresses of the respective monitoring devices 11 to 14 under its control, the device numbers and addresses of the remote control devices 16 which are always in the manned state, and the self-manned A state memory 47b is formed to store the state or the unmanned state.

The status stored in the status memory 47b is changed by the monitoring staff of the remote control device 15 to the operation unit 51.
It is set arbitrarily via. For example, it is set to be in a manned state at work in the morning and unmanned at the time of leaving the office in the evening.

The transmitting unit 48 receives the IS signal from the connection terminal 54a.
Connected to the DN signal lines 2e and 2f and connected to a connection terminal 54
It is connected to the telephone lines 17c and 17d via b.
Furthermore, RS that can be connected to an external host computer, etc.
-54C connection terminal 54c having interface standard
It is connected to the.

In the data file 53, a monitor information collecting memory for storing the monitor information transmitted from the respective monitoring devices 11, 12, 13, 14 under its control, and the respective monitoring devices 11, 12, 13, A log information collection memory that stores the log information transmitted from the server 14 is formed.

When the control unit 45 receives a trigger signal from one of the monitoring devices 11 to 14 under its control via the communication unit 48, as shown in the flow chart of FIG. 10, the CRT display device of the operation unit 51. 51a, as shown in FIG.
The trigger occurrence message 55 is displayed (S1).

Next, the monitoring device 11 that is the transmission source of the trigger signal
To 14 and each of the monitoring devices 11 to 14 under its own control, a command to stop monitoring the communication status of the interface point is sent (S2), and at the same time, a command to send monitor information and log information is sent (S3).

Then, the data collecting section 49 receives the ISDN signal lines 2a, 2b, 2 from the designated monitoring devices 11-14.
When the monitor information and the log information are received via c and 2d (S4), the received monitor information and the log information are written in the data file 53. Further, the received monitor information and log information are displayed on the CRT display device 51a of the operation unit 51 (S5).

Next, the contents stored in the state memory 47b of the RAM 47 are checked, and if the unmanned state is stored (S
In 6), since the observer does not monitor his / her remote control device 15, the INS is sent to the manned remote control device 16 which is constantly monitored by the monitor stored in the management memory 47a.
Transmit (transfer) the trigger signal in the -C communication mode (S
7).

FIG. 11 is a sequence diagram showing a signal flow between the above-mentioned devices.

For example, when the number of occurrences of specific log information in the terminal-side monitoring device 11 exceeds a threshold value, a trigger signal is sent to the remote control device 15 that controls itself. The remote control device 15 sends a monitor stop command to each of the monitoring devices 11 to 14 under its control, and subsequently sends an information transmission command. Then, the monitor information and the log information are transmitted from each of the monitoring devices 11 to 14 to the remote control device 15.

When the remote control device 15 is in an unmanned state, the remote control device 15 always sends a trigger signal to the remote control device 16 which is set in the manned state.

In this case, the manned remote control device 16
A trigger signal is only sent to, and collected monitor information and log information are not sent. The reason for this is that the monitor information and log information can be collected from the unattended remote control device 15 if necessary.

Upon receiving the trigger signal from the unmanned remote control device 15, the manned remote control device 16 clearly indicates that this trigger signal is received from another unmanned remote control device 15, and the trigger generation message is displayed. 55 for own CR
Display output to the T display device 51a.

FIG. 13 is a diagram showing the log information 56 displayed on the CRT display device 51a of the remote control device 15 which first receives the trigger signal. In this figure, S / T
The number of occurrences of each item of log information at the point is displayed. Then, in this case, it is indicated that the number of occurrences of the item "INFO synchronous stop" exceeds the threshold value and the trigger signal is transmitted.

Further, FIG. 14 shows the CR of the remote controller 15.
It is a figure which shows the monitor information 57 displayed on the T display device 51a. In this monitor information 57, the final time of the monitor information represented by the protocol information is 16: 25: 4.
2 seconds 538. That is, with this final monitor information, the number of occurrences of "INFO synchronization stop" is 3
It indicates that the threshold value of 00 has been reached.

It should be noted that FIG.
3 and the monitor information at the interface points other than FIG. 14 and the log information, and the other monitor information and the log information collected from the other monitoring devices have already been collected in the data file 53, the monitoring staff must operate the operation unit. 51 keyboard 5
1b can be used to display on the display screen of the CRT display device 51a.

In the case of the network monitoring system configured as described above, for example, the communication lines 2a and 2b to be monitored
If any abnormality occurs in the, the communication state (protocol information) at each interface point adjacent to the abnormality occurrence point becomes abnormal. Therefore, the number of times of occurrence of log information (event occurrence) corresponding to the abnormality rapidly increases and exceeds the threshold.

Therefore, the trigger signal is transmitted to the remote control device 15 under its control at that time. Then, the monitor stop command and the information transmission command are input from the remote control device 15. Therefore, since the detection of the monitor information is stopped when the trigger is generated, the monitor information memory 3 stores a predetermined number of monitor information (protocol information) immediately before the occurrence of the abnormality.
2, 42 are stored and held. Then, the monitor information stored and held is transmitted to the remote control device 15.

Therefore, even if the abnormality is a one-time occurrence, the monitor can surely confirm the communication state (protocol information) at the time of the abnormality at each interface point by the CRT display device 51a. Moreover, in this case, the monitoring person does not need to monitor the monitoring devices 11 to 13 installed in the user's house. That is, each of the monitoring devices 11 to 14 may be unmanned.

Further, since the remote control device 15 can also display the monitor information at other interface points at the trigger occurrence time on the CRT display device 51a, the communication status such as the protocol information of other interface points in the vicinity can be displayed. By comparing and contrasting the monitor information indicating the, it is possible to specify the abnormality occurrence position relatively easily.

Further, when the remote control device 15 is unattended at night or the like, the remote control device 15 sends a trigger signal to the remote control device 1 of the management center where the monitoring staff is always resident.
Transferred to 6.

Therefore, the observer resident at the management center is caused by an accident or the like at night detected by the remote control device 15 which is unmanned at night provided at a relay station other than this management center. You can also check the trigger signal. Therefore, it is not necessary to make a 24-hour monitor resident in all the remote control devices, so that the efficiency of measurement and monitoring work can be further improved.

The present invention is not limited to the above embodiment.

When the remote control device 15 that receives the trigger signal from the monitoring devices 11 to 14 is unattended, the monitoring device that outputs the trigger signal may send the trigger signal to the manned remote control device 16.

FIG. 15 is a sequence diagram showing the flow of signals between the above-mentioned devices.

For example, as in the case of FIG. 11, when the number of occurrences of specific log information in the terminal side monitoring device 11 exceeds a threshold value, a trigger signal is sent to the remote control device 15 which controls itself ( T1). The remote control device 15 sends a monitor stop command to each of the monitoring devices 11 to 14 under its control (T2),
Then, an information transmission command is sent (T3). Then, the monitor information and the log information are transmitted from each of the monitoring devices 11 to 14 to the remote control device 15 (T4).

The remote control device 15 writes the received monitor information and log information in the data file 53, and displays the trigger occurrence message 55 on the CRT display device 51a. When the self is unmanned, a trigger signal transfer command is sent to the monitoring device 11 that is the source of the trigger signal (T
5).

The monitoring device 11 of the transmission source which has received the transfer command of the trigger signal transmits the trigger signal to the remote control device 16 which is always set in the manned state (T6). In this case, only the trigger signal is transmitted to the manned remote control device 16, and the collected monitor information and log information are not transmitted.

The manned remote control device 16, which has received the trigger signal from the monitoring device 11 outside its own jurisdiction, clearly states that this trigger signal is received from the monitoring device 11 outside its jurisdiction, and The trigger occurrence message 55 is displayed and output to the display device 51a.

In this case, the remote control device 16 does not send the monitor stop command and the information transmission command to the monitor device 11 of the transmission source and each monitor device under its control.

Even in the network monitoring system configured as described above, when the remote control device receiving the trigger signal from the monitoring device is in the unmanned state, the trigger signal is also transmitted to the manned remote control device 16. Therefore, it is possible to obtain substantially the same effect as the system of the above embodiment.

[0122]

As described above, in the network monitoring system of the present invention, when the log information detected by the interface point on the signal line with respect to the monitoring device exceeds the predetermined threshold value, it is automatically remoted. Sending a trigger to the controller. Therefore, the remote control device can automatically collect the monitor information and the monitor information at the time of the trigger occurrence detected by the monitoring device, and the monitor information and the log information of the interface point at the time of the abnormality occurrence can be surely grasped. As a result, the cause can be investigated in a short time when an abnormality occurs in each signal line.

Furthermore, when a plurality of monitoring devices are shared by a plurality of remote control devices for remote control, when an unmanned remote control device receives a trigger signal, the manned remote control device finally receives the trigger signal. You can check the trigger signal. Therefore, since it is not necessary to always have the monitoring staff resident in all the remote control devices, the efficiency of the measurement and monitoring work can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a communication system incorporating a network monitoring system according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a schematic configuration of a monitoring device incorporated in the embodiment monitoring system.

FIG. 3 is a diagram showing an S / T point monitor information file formed in the monitor information file of the same monitoring device.

FIG. 4 is a diagram showing an R point monitor information file formed in the monitor information file of the same monitoring device.

FIG. 5 is a diagram showing an FR point monitor information file formed in the monitor information file of the monitoring device.

FIG. 6 is a diagram showing an S / T point log information file formed in the log information file of the monitoring device.

FIG. 7 is a diagram showing an R-point log information file formed in the log information file of the monitoring device.

FIG. 8 is a diagram showing an FR point log information file formed in the log information file of the monitoring device.

FIG. 9 is a block diagram showing a schematic configuration of a remote control device of the monitoring system of the embodiment.

FIG. 10 is a flowchart showing the operation of the remote control device.

FIG. 11 is a sequence diagram showing the exchange of signals between the respective devices in the monitoring system of the embodiment.

FIG. 12 is a diagram showing a trigger occurrence message displayed on the remote control device.

FIG. 13 is a diagram showing log information displayed on the remote control device.

FIG. 14 is a diagram showing monitor information displayed on the remote control device.

FIG. 15 is a sequence diagram showing signal transmission / reception between devices in a network monitoring system according to another embodiment of the present invention.

[Explanation of symbols]

1 ... communication network, 2, 2a, 2b, 2c, 2d,
2e, 2f, 2g ... ISDN signal line, 3, 3a, 3
b, 3c, 3d, 3e, 3f, 3g ... DSU, 4, 4a
... TA, 5, 10 ... TE2, 6 ... packet communication line, 7
... DCE, 8 ... DET, 9, 9a, 9b, 9c ... Modem, 11, 12, 13 ... Terminal-side monitoring device, 14 ... Exchanger-side monitoring device, 15, 16 ... Remote control device, 17, 17
a, 17b, 17c, 17d, 17e ... Telephone line, 20
... Monitoring device main body, 21 ... Adapter device, 22 ... Basic interface S / T point monitoring unit, 23 ... Primary group velocity interface S / T point monitoring unit, 24, 48 ... Communication unit, 25, 5
1 ... Operation part, 26, 28, 38, 45 ... Control part, 29,
39 ... Monitor section, 30, 40 ... Log information detecting section 31,
41 ... Trigger generator, 32, 42 ... Monitor information file, 33, 43 ... Log information file, 34a, 34b ...
Switching contact, 47b ... Status memory, 49 ... Data collecting section,
53 ... data file, 55 ... trigger occurrence message

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Akio Takahashi 5-1027 Minamiazabu, Minato-ku, Tokyo Within Anritsu Co., Ltd. Telegraph and Telephone Corporation (72) Inventor Tetsuya Yamada 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Japan Telegraph and Telephone Corporation (72) Inventor Satoshi Hirahara 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation

Claims (2)

[Claims] 1. A plurality of monitoring devices (11 to 14) for detecting and storing monitor information and log information at each interface point on a signal line of a communication network (1), and each monitoring device under its control. A plurality of remote control devices (15,
16), wherein each of the monitoring devices (11 to 14) is a remote control device that manages itself when the number of occurrences of the sequentially detected log information exceeds a predetermined threshold value. Trigger means for transmitting trigger information (31,
41) and an information transmitting means (24) for transmitting the monitor information and the log information stored and held to the corresponding remote control device in response to an information transmission command from the remote control device. (15.16) is a status memory (47b) that stores whether a person is in a manned state or an unmanned state, and a transmission command that transmits an information transmission command to the corresponding monitoring device in response to reception of trigger information from the monitoring device that it controls. Transmitting means (S3), display output means for displaying and outputting monitor information and log information received from the monitoring device (S5), and when the unattended state is stored in the state memory, the received trigger information is always A network monitoring system, comprising: trigger information transfer means (S7) for transmitting to another remote control device determined to be manned. 2. A plurality of monitoring devices (11 to 14) for detecting and storing monitor information and log information at each interface point on a signal line of a communication network (1), and each monitoring device under its own control. A plurality of remote control devices (15,
16) and a network monitoring system including: each of the monitoring devices (15, 16) is a remote control device that controls itself when the number of occurrences of the sequentially detected log information exceeds a predetermined threshold value. A trigger stage (T1) for transmitting the trigger information, and an information transmitting means (T4) for transmitting the monitor information and the log information stored and held to the corresponding remote control device in response to an information transmission command from the remote control device. And a trigger information re-transmitting means (T6) for transmitting the trigger information to another remote control device which is always defined as a manned state in response to a trigger information transfer command from the remote control device, The control device (11 to 14) issues a status memory (47b) that stores whether it is a manned state or an unmanned state and an information transmission command to the corresponding monitoring device in response to receiving trigger information from the monitoring device that it controls. Command sending means (T3) to send, Display output means (S5) for displaying and outputting the monitor information and the log information received from the monitoring device, and when the unattended state is stored in the status memory, a trigger information transfer command to the monitoring device that is the sender of the trigger information. A network monitoring system comprising: a transfer command sending means (T5) for sending