JPH06188948A - Backup device - Google Patents

Abstract

PURPOSE:To provide the backup device which can select a restoration confirmation signal transmission condition and safely and efficiently performs the system operation even after a current line fault and after restoration and can transmit a restoration confirmation signal during switching to a standby line corresponding to a system by keyboard operation as well as remote control. CONSTITUTION:The backup device 1 is provided with restoration confirmation signal transmission parts 4 which receive control information, which is based on line designation information inputted from a keyboard 9 or received by a remote control part 11, from a central control part 7 and have a function to select whether the effective or ineffective restoration confirmation signal synchronized with the communication state of DTEs 13 should be outputted or the restoration confirmation signal should be output to current lines 14 in the normally ineffective state or the normally effective state in accordance with lines indicated by control information.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backup device, and more particularly to a backup device having a function of sending a recovery confirmation signal to a working line even after switching to a backup line.

[0002]

2. Description of the Related Art As a conventional backup device, Japanese Patent Laid-Open No. 63-266933 (a backup system for a communication line in a monitoring and control system) and Japanese Patent Laid-Open No. 2-716.
There is one disclosed in Japanese Patent No. 37 (backup system).

In the conventional backup system of this type, an effective restoration confirmation signal sent from the backup device to the working line side is sent at regular intervals or constantly to confirm the failure restoration of the working line after switching the protection line. Then, the response from the working line to this was used as the judgment for recovery from the working line failure.

In this system, as shown in FIG. 5, the backup device (BKM) 20 detects a failure on the working line 14 side, and after switching to the protection line 15 by the route of the arrow,
Backup device 2 when the failure of working line 14 is recovered
Since a signal collision occurs in the communication between the center device 30 and the DTE 13 during the call on the working line 14 on the route of the valid recovery confirmation signal transmitted by the route of the arrow of 0 and the route of the arrow, After the line failure occurs, the disconnection process is performed with the working line 14 at the location where the failure occurs, or the backup device 20 switching to the protection line is promptly switched back to the working line 14 after the recovery of the working line failure. The procedure was being performed.

[0005]

Therefore, in the above-described conventional backup device, after the working line fails and is restored, a valid restoration confirmation signal issued by the backup device itself causes a system down of the working line. However, there is a problem that this reduces the safe and efficient system operation.

The present invention solves the above-mentioned problems, and an object of the present invention is to enable selection of a condition for sending a recovery confirmation signal, and to ensure safe and efficient system operation after a failure in the working line and after the recovery. Another object of the present invention is to provide a backup device capable of transmitting a recovery confirmation signal while switching to a protection line according to the system by either keyboard operation or remote control.

[0007]

A backup device of the present invention accommodates a working line to be monitored and switches to a protection line after detecting a working line fault, and a line monitoring unit for detecting a fault and recovery of the working line. And a communication control unit that controls communication with the protection line when switching to the protection line, a display unit that displays the monitoring status, a keyboard that inputs monitoring control information from the outside, and monitoring control information for remote locations. In a backup device including a remote control unit for transmission / reception and a central control unit for controlling the entire device, after inputting from the keyboard or the remote control after accommodating a working line, detecting a working line failure and switching to a standby line In response to an instruction from the central control unit that has received the line designation information and the control information received by the control unit, the output state of the restoration confirmation signal to be sent to the working line is selectively output. Characterized by comprising a restoration confirmation signal transmitting unit having a function.

[0008]

Therefore, according to the present invention, since the restoration confirmation signal transmission condition can be selected, the system operation can be performed safely and efficiently after the working line failure and after the restoration. Further, the recovery confirmation signal can be sent while switching to the protection line according to the system by either keyboard operation or remote control.

[0009]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of a backup device according to the present invention, FIG. 2 is an operation sequence diagram of the backup device, FIG. 3 is an internal configuration diagram of a restoration confirmation signal sending section, and FIG. 4 is the present invention. It is a system block diagram provided with the related backup device.

The backup device 1 accommodates a plurality of working lines 14 to be monitored, and a switch unit (SWB) 3 which is a line switching unit for switching to the protection line 15 and a recovery confirmation for selectively transmitting a recovery confirmation signal. Signal transmission unit (OSU)
4 and a line monitoring unit (SLU) 5 that monitors the working line 14
A communication control unit (BLU) 6 that controls communication with the protection line 15 when switching to the protection line 15, a display unit (CRT) 8 that displays the monitoring status, and monitor control information from the outside are input. A keyboard (KB) 9, a remote control unit (RCU) 11 that transmits and receives monitoring control information to and from a remote location, a memory unit (MEM) 10 that stores data received via the keyboard 9 or the remote control unit 11, and an apparatus. It is composed of a central control unit (CPU) 7 which controls the whole.

As shown in FIG. 3, the restoration confirmation signal transmission unit 4 includes a restoration confirmation signal transmission unit (301) synchronized with the communication state of the DTE and a restoration confirmation signal transmission unit (3) that is always valid.
02) and the always-invalid recovery confirmation signal transmission section (303)
And each recovery confirmation signal transmission unit (301), (302),
(303) and the switch part (3
04) and.

Next, the operation of the present invention will be described with reference to the operation sequence diagram of FIG.

First, the working line 14 and DT desired to be monitored
The switch unit 3 connects E13 in advance. Next, the line designation information and the control information are input from the keyboard 9 or the remote control unit 11 to the central control unit 7 (201). The central control unit 7 uses the line designation information and the control information as monitoring conditions,
Back-up communication destination address information, DTE1 to connect
The attribute information of No. 3, the recovery confirmation signal output condition to the working line 14, the backup operation condition, and the like are stored in the memory unit 10 (202). The line monitoring unit 6 monitors (204) the working line 14 according to the display of the central control unit 7 (203),
The monitoring data is taken up by the central control unit 7 (205).

When the central control unit 7 detects an abnormality in the monitoring data collected from the line monitoring unit 6, it extracts information from the memory unit 10 (206) and switches the switch unit 3 and the communication control unit 6 to the protection line 15. And an instruction to connect to the protection line 15 is issued (207). Further, the central control unit 7 commands the restoration confirmation signal output condition to the restoration confirmation signal output unit (2
08), and the restoration confirmation signal sending unit 4 outputs a restoration confirmation signal according to this to the working line 14 (209).

As described above, the restoration confirmation signal transmitting section 4 is
A recovery confirmation signal transmission unit (301) synchronized with the communication state of the DTE 13 and a recovery confirmation signal transmission unit (30) that is always valid
2) and the always-invalid recovery confirmation signal transmission part (303)
And each recovery confirmation signal transmission unit (301), (302),
(303) and the switch part (3
04) and the switch unit (304) is shown in FIG.
The recovery confirmation signal transmitting unit designated by the instruction (208) and the working line 14 are connected.

In this way, only the operation from the keyboard 9 or the remote control section 11 can provide the output condition of the restoration confirmation signal to the working line 14 with selectivity.

In the case of this system, when the always invalid recovery confirmation signal transmission in FIG. 4 is designated to the backup device 1 by the operation from the keyboard 9 or the remote control unit 11, even after the failure recovery of the working line 14, the arrow A collision does not occur between the communication between the center devices 30DTE13 that are busy on the working line 14 on the route and the invalid recovery confirmation signal issued by the backup device 1.

[0019]

As described above, according to the present invention, the control information based on the line designation information input from the keyboard or received by the remote control unit is received from the central control unit, and the control information is supplied according to the line. , Output function to select whether to output valid or invalid restoration confirmation signal synchronized with DTE communication state to working line, or to output restoration confirmation signal to working line in always invalid state or always valid state By providing a recovery confirmation signal transmission section with a recovery confirmation signal transmission condition, you can select the conditions for transmitting the recovery confirmation signal, so that the system operation can be performed safely and efficiently after the failure of the working line and after the restoration, and the system can be switched to the backup line according to the system. The restoration confirmation signal can be sent by either keyboard operation or remote control.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a backup device according to the present invention.

FIG. 2 is an operation sequence diagram of the backup device.

FIG. 3 is an internal configuration diagram of a restoration confirmation signal transmission unit.

FIG. 4 is a system block diagram including a backup device according to the present invention.

FIG. 5 is a system block diagram of a conventional backup method.

[Explanation of symbols]

1 Backup device (BKM) 3 Switch unit (SW) which is a line switching unit 4 Recovery confirmation signal sending unit (OSU) 5 Line monitoring unit (SLU) 6 Communication control unit (BLU) 7 Central control unit (CPU) 8 Display unit (CRT) 9 keyboard (KB) 10 storage unit (MEM) 11 remote control unit (RCU) 13 DTE 14 working line 15 backup line 301 recovery confirmation signal transmission unit 302 synchronized with the DTE communication state of the recovery confirmation signal transmission unit 302 restoration Always valid restoration confirmation signal sending section of confirmation signal sending section 303 Always invalid restoration confirmation signal sending section of restoration confirmation signal sending section 304 Switch section of restoration confirmation signal sending section

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical indication H04Q 9/00 311 M 7170-5K

Claims (1)

[Claims] 1. A line switching unit that accommodates a working line to be monitored and switches to a protection line after detecting a failure in the working line, a line monitoring unit that detects failure and recovery of the working line, and a protection line when switching to the protection line. A communication control unit that controls communication with the device, a display unit that displays the monitoring status, a keyboard that inputs monitoring control information from the outside, a remote control unit that transmits and receives monitoring control information to and from a remote location, and control of the entire device. In a backup device including a central control unit for performing the following, after accommodating the working line and detecting the working line fault and switching to the protection line, the line designation information and the control information input from the keyboard or received by the remote control unit are input in advance. According to the received instruction from the central control unit, a restoration confirmation signal transmitting unit having a function of selectively outputting the output state of the restoration confirmation signal to be transmitted to the working line is provided. Characteristic backup device.