JPH0698036A - Power source break notifying device - Google Patents

Abstract

PURPOSE:To provide the power source break notifying device, in which a monitoring device can especially judge whether it isdue to the fault of a line or the like or the power source break of a MODEM on the side of a terminal equipment, concerning the power source break notifying device for detecting the power source OFF of the MODEM on the terminal equipment side and reporting it to the monitoring device. CONSTITUTION:A terminal equipment 1, host computer 2 and monitoring device 3 provided on the side of the host computer 2 are linked through a first MO DEM 4 provided on the side of the terminal equipment 1 and a second MODEM 5 provided on the side of the host computer 2 by a line 6, communication is performed between the terminal equipment 1 and the host computer 2, and the state on the side of the terminal equipment 1 including the abnormality of the line 6 is monitored by the monitoring device 3. Such a system is equipped with a detecting means 8 provided between the line 6 and the first MODEM 4 for detecting the break of a power source at the first MODEM 4 and a transmitting means 10 for transmitting power source break detecting signal detected by the detecting means 8 to the monitoring device 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitoring system for an analog leased line, and more particularly to a power cutoff notification device for detecting a power cutoff of a modem on a terminal device side and notifying the monitoring device.

Recently, in a monitoring system for an analog dedicated line in the case of communicating between a host computer (hereinafter referred to as a host) and a terminal device, a monitoring device for monitoring the line and the terminal device for a failure is provided on the host side. When the modem of the terminal device is powered off, the method of sending a alarm signal to the monitoring device by the modem of the host device detecting the reception carrier OFF due to the power off of the modem of the terminal device, and the monitoring device from the host device There are methods to judge without response to periodical polling by powering off the modem on the terminal device side, but with these methods, it is a phenomenon that also occurs when the modem function failure on the terminal device side or the communication line is abnormal. However, since this cannot be separated, a method that can be recognized separately is desired.

[0003]

2. Description of the Related Art FIG. 6 illustrates a monitoring system in data communication using an analog leased line. In the figure, 1a is a terminal device, 2a is a host, 3a is a system monitoring device, 4a and 5a are modems, and 6a is an analog dedicated line (hereinafter referred to as a line).

The communication between the terminal device 1a and the host 2a is performed by the modem 4
a, 5a and the line 6, and the system monitoring device 3a
Is the modem 5a on the host 2a side and the modem 4a on the terminal device 1a side.
Method for detecting and receiving an alarm signal sent by detecting the reception carrier OFF due to power interruption of the terminal, or a terminal device for periodic polling from the system monitoring device 3a
The monitoring is performed by a method of judging without a response due to the power failure of the modem 5a on the 1a side.

[0005]

According to the above-mentioned conventional method, as a method of monitoring power-off of the modem on the terminal device side by the system monitoring device, an alarm signal is received by detecting the reception carrier OFF by the modem on the host side. Depending on the method of making a judgment, or making a judgment without a response to the periodic polling from the system monitoring device,
These phenomena occur not only when the modem of the terminal device is powered off, but also when the modem of the terminal device is in an abnormal state and loses the response function to the outside, or when there is a failure such as when the line is abnormal. Since these two phenomena can occur,
Is it a phenomenon due to the power off of the modem that is being operated,
It is difficult to determine whether the phenomenon is caused by a failure, and investigation is required to take corrective action. Especially when a VAN (value-added network) vendor manages the system,
There is a problem that it is more difficult to make a judgment because the operation of the user cannot be grasped.

An object of the present invention is to provide a power-off notification device capable of determining whether a monitoring device has a line failure, a failure of a modem on the terminal side, or a power-off of the modem on the terminal side.

[0007]

FIG. 1 shows the principle of the present invention. In the figure, 1 is a terminal device, 2 is a host computer, 3 is a monitoring device, 6 is a line, 4 is a first modem provided on the terminal device 1 side, and 5 is a second modem provided on the host computer 2 side. A modem, 8 is a detecting means for detecting the power-off of the first modem 4, and 10 is a transmitting means for transmitting the power-off detection signal detected by the detecting means 9 to the monitoring device 3.

Therefore, the terminal device 1 and the host computer 2 are connected by the line 6 via the first modem 4 and the second modem 5, the terminal device 1 and the host computer 2 communicate with each other, and the monitoring device 3 connects the line. In the system for monitoring the state of the terminal device 1 side including the abnormality of 6, the detecting means 8 and the transmitting means are provided between the line 6 and the first modem 4.
It is a power-off notification device provided with 10.

[0009]

When the power supply of the first modem 4 is cut off, the detecting means 8 detects the power cutoff, and the transmitting means 10 transmits the power cutoff detection signal to the monitoring device 3 so that the monitoring device 3 can be periodically operated. If there is no response to the polling, the cause is a line error or an error in the first modem 4,
Since it is possible to determine whether the power of the modem 4 has been cut off, it is possible to appropriately and swiftly perform the countermeasure.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The same reference numerals denote the same objects throughout the drawings.

FIG. 2 is a system block diagram of an embodiment in which the present invention is applied to the data communication monitoring system described in the conventional example, and FIG. 3 is a block diagram of the power-off notification device of the embodiment. The system monitoring device 3b, the modem 4a, the modem 5a, the line 6a, the detecting unit 8a, and the secondary channel signal (hereinafter referred to as S-CH signal) transmitting / receiving unit 10a in FIGS. Of the modem 4, the second modem 5, the line 6, the detecting means 8 and the transmitting means 10, respectively.

As shown in FIG. 2, a power cut notification device 7 is provided between the line 6a and the modem 4a. In FIG. 3, 8a is a detection unit, 9 is a control unit, 10a is an S-CH signal transmission / reception unit, 11 is a line unit, 12 is an ID hardware setting unit, 13 is a main power supply (the power supply of the own device of claim 2). , 14 is a backup battery (hereinafter referred to as battery: corresponding to the battery of claim 2), 15 is a battery status display section (hereinafter referred to as display section), and 16 to 18 are latching relays (claim 3 and the latching relay according to claim 4), 19 to 21 denote connectors.

When the power of the modem 4a is cut off, the detection unit 8a detects the power cut and sends a power cut detection signal to the control unit 9. In addition, the battery 14
Is notified to the control unit 9 when the voltage drops to a predetermined voltage.

Here, the relationship between the power-off of the modem 4a and the main power supply 13 of the power-off notification device 7 will be described. In both relationships, the power-off of the modem 4a and the power-off notification device 7 are simultaneously cut off. The power supply of the modem 4a is cut off, but the main power supply 13 of the power cut notification device 7 is not cut off, and the power supply of the modem 4a is not cut off, but the main power supply 13 of the power cut notification device 7 is cut off. , There are three methods, but in the above method, power is supplied from the main power supply 13 to the battery.
However, the discharge time is limited due to the life of the battery 14. Therefore, when the power supply of the modem 4a is cut off, the power supply notifying device 7 is not supplied with power,
There may be a case where the power cut notification of the modem 4a, which is the purpose of the power cut notification device 7, is impossible.

Therefore, as a condition for installing the power cut notification device 7, the power cut notification device 7 and the modem 4a are powered from the same switchboard (in the case), or the main power supply 13 of the power cut notification device 7 is cut off. It is possible to use a power supply method that does not

However, in general, the power supply of the modem 4a is cut off, and the main power supply 13 of the power supply cutoff notification device 7 can be cut off. Since the possibility is low, when the power of the modem 4a is cut off, the main power supply 13 is necessarily cut off.

The S-CH signal transmission / reception unit 10a is composed of an LSI, and the power supply of the connected modem 4a, the power supply status of the own device, and the status of the battery 14 are instructed by the control unit 9 according to a command.
The S-CH signal is transmitted to the system monitoring device 3b via the line 6a as a telegram having the format illustrated in FIG. 4, and a reception completion telegram corresponding to the telegram is received.

The line section 11 is for adjusting the transmission / reception level and for the line.
Manages connection with 6a. The ID hardware setting unit 12 sets the identifier (ID) of the connected modem 4a. In this embodiment, only the modem 4a of the terminal device 1a is described. However, since the host 2a generally communicates with the plurality of terminal devices via the respective lines, the system device 3b has each terminal It is necessary to identify the modem connected to the device by ID.

The display unit 15 includes an indicator lamp composed of a light emitting diode (LED), and when the battery 14 is insufficiently charged, when the battery 14 is removed, or when the battery 14 is in an abnormal state (for example, The state of the end of life is displayed by a command from the control unit 9.

The latching relays 16 and 17 operate according to a command from the control unit 9 to connect the transmission line and the reception line of the line 6a and the modem 4a to each other and to connect the transmission line and the reception line of the S-CH signal transmission / reception unit 10a to the line 6a. Switch to each connection.

The latching relay 18 operates according to a command from the control unit 9 and switches the main power source 13 to the battery 14. The latching relays 16-18 are the main power source 13 or the battery.
It is configured such that it is excited by the power of 14 to perform the switching operation, and after the switching operation, the state is maintained as it is without power consumption. Therefore, in a normal relay, power must be supplied in order to maintain the switch state, but the latching relays 16 to 18 only consume power during the switching operation, and the power consumption can be saved.

The control unit 9 includes an MPU and a control program, and the MPU controls each of the above units according to the control program. That is, when the power of the modem 4a is cut off, the detection unit 8a
Is detected based on the power-off detection signal detected by the S-CH signal transmission / reception unit 10 when the main power supply 13 is cut off.
a, ID hardware setting unit 12, latching relays 16 to 18 and display unit 15 are controlled to switch main power supply 13 to battery 14 and to notify system monitor 3b of the power supply state of modem 4a and its own device. Meanwhile, the state of the battery 14 is displayed on the display unit 15.

The system monitoring device 3b has a function similar to that of the system monitoring device 3a described in the conventional example, and when a notification message such as power-off of the modem 4a from the power-off notification device 7 is received, the illustration thereof is omitted. The display unit displays the contents of the received message such as the power-off of the modem 4a and the state of the battery 14, and transmits the reception completion response message to the power-off notification device 7.

Since it has such a structure and function, its operation will be described below with reference to the flow chart of FIG. When the power of the modem 4a is cut off, the detection unit 8a detects the power cutoff and a power cutoff detection signal is sent to the control unit 9, and the control unit 9 operates the latching relays 16 and 17 to connect the line 6a and the modem. Connect the transmission line and the reception line of 4a to the line 6a and S-CH
The connection is switched to the transmission line and the reception line on the signal transmitting / receiving unit 10a side.

When the main power supply 13 is cut off due to the power-off of the modem 4a, the control unit 9 operates the latching relay 18 to switch the main power supply 13 to the battery 14. (Main power supply 13
When is disconnected, the latching relay 18 is operated by the electric power stored in advance in a storage device (not shown). ) From the S-CH signal transmitting / receiving unit 10a, the connected modem 4a
The ID, the power-off of the modem 4a, the power supply status of the own apparatus, and the status of the battery 14 are transmitted as a telegram to the system monitoring apparatus 3b.

The system monitoring device 3b displays the contents of the received electronic message on the display unit and displays the reception completion response electronic message in S
-CH signal is transmitted to the transmission / reception unit 10a. System monitoring equipment
From the display of 3b, the monitoring person recognizes the power-off of the modem 4a, the state of the battery 14, etc., and, for example, if the battery 14 has reached the end of its life, a replacement procedure is performed.

When the S-CH signal transmitting / receiving unit 10a receives the reception completion response message from the system monitoring device 3a, the control unit 9
Activates the latching relays 16 and 17 to connect the line 6a and S-C.
The connection of the transmission line and the reception line on the H signal transmission / reception unit 10a side is switched to the connection of the transmission line and the reception line of the line 6a and the modem 4a.

When the latching relay 18 is connected to the battery 14 side, the latching relay 18 is switched to the main power source 13. In this way, by detecting the power failure of the modem 4a and transmitting it to the system monitoring device 3b, the system monitoring device
The line 3b judges whether the line is abnormal or the modem 4a is abnormal by receiving an alarm signal by the detection of the reception carrier OFF by the modem 5a on the host 2a side, or by the system monitoring device 3b.
The determination can be made without a response to the periodical polling from, and the determination can be made separately from the power-off of the modem 4a, so that the corrective action can be taken accurately and quickly.

Further, the connection of the transmission line and the reception line of the line 6a and the modem 4a is switched to the connection of the transmission line and the reception line of the S-CH signal transmission / reception unit 10a and the latching relay 16,1.
7 is used and the latching relay 18 is used to switch between the main power supply 13 and the battery 14, so the state is maintained without power consumption except during the switching operation, so the power consumption can be reduced. The life of the battery 14 can be extended.

[0030]

As described above, according to the present invention, in claim 1, the terminal device, the host and the monitoring device provided on the host side are the first modem provided on the terminal device side, and A first modem in a system that is connected by a line via a second modem provided on the host side, communicates between the terminal device and the host, and monitors the state of the terminal device side including the line abnormality by the monitoring device. By providing a power-off notification device provided between the line and the first modem, the power-off notification device having a detection means for detecting the power-off of the power source and a transmission means for transmitting the power-off detection signal detected by the detection means to the monitoring device. Since the monitoring device can distinguish between the abnormality of the line and the abnormality of the modem on the terminal device side and the power-off of the modem of the terminal device side, it is possible to appropriately and swiftly perform the countermeasure.

According to a second aspect of the present invention, the detecting means detects a state including the remaining amount and the abnormality of the battery for backing up the power source of the own device, and the transmitting means notifies the monitoring device of the state of the battery detected by the detecting means. By doing so, the monitoring device can determine the state of the battery, and can take appropriate countermeasures.

According to a third aspect of the present invention, since the detecting means includes a latching relay for switching the connection of the line and the first modem to the connection of the line and the transmitting means when the power supply of the first modem is detected, The power consumption of the battery can be reduced, and the life of the battery can be extended.

According to the fourth aspect of the present invention, by providing the latching relay for switching the power source of the own device to the battery for backing up, the power consumption of the battery after the switching can be reduced and the life of the battery can be extended. There is an effect.

[Brief description of drawings]

FIG. 1 is a block diagram of the principle of the present invention.

FIG. 2 is a system block diagram showing an embodiment of the present invention.

FIG. 3 is a block diagram showing a power cut notification device according to an embodiment.

FIG. 4 is a diagram showing a format of a notification message according to the embodiment.

FIG. 5 is a flowchart of an embodiment.

FIG. 6 is a block diagram showing a conventional communication system.

[Explanation of symbols]

1,1a is a terminal device and 2,2a is a host computer
(Host) 3 is a monitoring device, 3a and 3b are system monitoring devices, 4 is a first modem, 4a and 5a are modems,
5 is a second modem, 6 and 6a are lines, 8 is detecting means, 8a is detecting section, 10 is transmitting means, 10
a is a secondary channel signal (S-CH signal) transmission / reception unit,
13 is the main power supply, 14 is a backup battery (battery), 16 to 18 are latching relays,

Claims (4)

[Claims] 1. A terminal device (1), a host computer (2) and the host computer (2)
A monitoring device (3) provided on the side of the terminal device (1), a first modem (4) provided on the terminal device (1) side, and a second modem provided on the host computer (2) side.
The terminal connected via the line (6) via the (5), communicating between the terminal device (1) and the host computer (2), and including the abnormality of the line (6) by the monitoring device (3). In the system for monitoring the state of the device (1) side, a detection means provided between the line (6) and the first modem (4) for detecting disconnection of the power source of the first modem (4)
A power-off notification device comprising: (8); and a transmission means (10) for transmitting a power-off detection signal detected by the detection means (8) to the monitoring device (3). 2. The detecting means (8) detects a state including a remaining amount and an abnormality of a battery that backs up the power source of the own device, and the transmitting means (10) is detected by the detecting means (8). 2. The power-off notification device according to claim 1, wherein the status of the battery is notified to the monitoring device (3). 3. The detecting means (8) comprises the first modem.
When the power failure of (4) is detected, the line (6) and the first
Connect the modem (4) to the line (6) and the transmitting means (10)
The power-off notification device according to claim 1 or 2, further comprising a latching relay for switching the connection. 4. The power cut notification device according to claim 1, further comprising a latching relay for switching the power supply of the device itself to the battery.