JPH0993368A - Line changeover device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain utilizing efficiency high on the occurrence of a fault of a terminal equipment by providing a restoration means connecting a communication line terminal for switching connection to a 1st terminal equipment. SOLUTION: A 2nd terminal equipment 4 used for emergency other than a normal state is an emergency notice system and connects to a line terminal 5 used on emergency. A switch signal used for changeover comes to a control line 6. Furthermore, a communication line contained in a communication line terminal 7 is connected usually to a usual terminal equipment use line terminal 3 by a line changeover device 1 and connected to the terminal equipment 2 used normally. On emergency, when a predetermined switch signal including a password comes from the control line 6, the line changeover device 1 detects the arrival to switch the communication line terminal 7 to a line terminal 5 used on emergency as shown by dotted lines from the usual terminal equipment line terminal 3, and the emergency communication system 4 is connected to the communication line terminal 7 and used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line connection device for connecting a subscriber line and a terminal device, and more particularly to a line connection device for switching a subscriber line to a plurality of types of terminal devices for connection.

[0002]

2. Description of the Related Art Information processing devices such as a telephone, a facsimile transmitter / receiver, an answering machine, a personal computer, an emergency call system, a disaster contact device, a monitoring information report device, etc. have been recently connected to a subscriber line and have various types. Are widely used. In this case, these information processing devices are usually used in a fixed connection relationship with the subscriber line in a one-to-one relationship.

[0003]

However, at the time of a disaster such as an earthquake, a typhoon, etc., which has recently occurred frequently in various places, the information processing device connected to the subscriber line becomes unusable due to damage to the subscriber line. Sometimes. As a result of examining the situation in this case, when the information processing device cannot be contacted due to a disaster, the information processing device is in the usable state, but is in the unusable state due to disconnection of the subscriber's line. It has been found that there is a situation in which traffic is congested due to inquiries from related parties at the time of a disaster and the switching center is in a state where connection cannot be established. This significantly reduces the use efficiency of this type of information processing apparatus when a disaster occurs, and is extremely uneconomical in terms of circuit design.

An object of the present invention is to provide a line switching device capable of maintaining high usage efficiency of a terminal device connected to a subscriber line in the event of a disaster.

[0005]

In order to achieve this object, a line switching device according to the present invention includes a first terminal line terminal connected to a first terminal device which is normally used,
A second terminal line terminal connected to the second terminal device used at times other than normal, a control line terminal accommodating a control subscriber line, and a communication line accommodating a communication subscriber line Terminal and normally, the communication line terminal is connected to the first terminal line terminal, and the communication line terminal is provided when a predetermined switching signal arrives from the control subscriber line to the control line terminal. To the second terminal line terminal, and a recovery means for recovering and connecting the switch-connected communication line terminal to the first terminal device. There is. The restoration means may be configured to make the restoration connection by a predetermined restoration signal coming from the control subscriber line to the control line terminal.

[0006]

1 shows an embodiment of a line switching device 1 according to the present invention, in which a terminal 2 which is normally used is a telephone, a facsimile, a transceiver,
It is connected to the normal terminal line terminal 3. The second terminal device 4 used in an emergency other than the normal time is an emergency notification system and is connected to the line terminal 5 used in an emergency.
A switching signal used for switching arrives at the control line 6. This switching signal generally includes a personal identification number to enhance the reliability of control operation. A communication line is accommodated in the communication line terminal 7. This communication line is normally connected to the normal terminal line terminal 3 by the line switching device 1 and is connected to the terminal 2 which is normally used. In an emergency, when a predetermined switching signal including a personal identification number arrives from the control line 6, the line switching device 1 detects this and the communication line terminal 7
Is switched from the normal terminal line terminal 3 to the line terminal 5 used in an emergency as shown by the dotted line, and the emergency communication system 4 is connected to the communication line terminal 7 and can be used. Therefore, even in a situation where the person in charge of the emergency call system 4 cannot reach the facility in which the emergency call system 4 is placed in case of an earthquake or the like in an emergency, a predetermined switching from the usable subscriber telephone or public telephone If a signal can be sent to the control line 6, as long as the line switching device 1 and the emergency call system 4 are not out of order, a preset emergency call is issued or a disaster report from various places is received and recorded. It is possible to execute an automatic processing operation such as saving. This was confused by excessive traffic from general subscriber phones during the recent earthquake in Hanshin, but in light of the fact that it was possible to achieve communication with a relatively large margin for personal computer communication. , It provides a powerful means of securing a communication network in the event of a disaster, and its practical value is extremely large.

FIG. 2 shows another embodiment of the line switching device according to the present invention, in which a data communication terminal such as a personal computer is used as the second terminal device 4 instead of the emergency call system in the case of FIG. ing. A line for data communication or the like is connected between the line terminal 5 and the data communication terminal 4 such as a personal computer. Also in this case, when a predetermined switching signal including a personal identification number arrives from the control line 6, the line switching device 1 detects this and the communication line terminal 7 is indicated by a dotted line from the normal terminal line terminal 3 as shown in FIG. Connected to the line terminal 5 used at times other than normal, and connected to the data communication terminal 4 such as a personal computer.
Is connected to the communication line 7 and can be used. According to this embodiment, the communication line 7 having the minimum required number of lines is simply drawn into the line switching device 1 according to the present invention, and this is used for data communication between the terminal 2 at the normal time and the personal computer or the like used at the time other than the normal time. It is possible to appropriately switch to the terminal 4 and maintain high usage efficiency.

FIG. 3 shows still another embodiment of the line switching device according to the present invention. Instead of the emergency call system 4 in the case of FIG. 1 or the data communication terminal 4 such as a personal computer in the case of FIG. An emergency telephone or other communication device arranged at the disaster countermeasures headquarters or the like is used as the second terminal device 4. An emergency line is connected between the line terminal 5 and the communication device 4 such as the disaster headquarters. Here, the control line 6
When a predetermined switching signal including a personal identification number arrives from
The line switching device 1 detects this and switches and connects the communication line terminal 7 from the normal terminal line terminal 3 to the line terminal 5 used at times other than normal as shown by the dotted line, and The communication device 4 is connected to the communication line 7 and becomes usable. Also in this embodiment, even if the person in charge in charge of the disaster countermeasures headquarters or the like cannot reach the disaster countermeasures headquarters in an emergency, a predetermined switching signal is sent to the control line 6 from the usable subscriber telephone or public telephone. If possible, the line switching device 1 and the communication device 4 such as the disaster countermeasures headquarters
As long as there is no breakdown, it is possible to immediately start the countermeasure activity using the communication device 4 as soon as the available member arrives.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 4 shows an embodiment of a line switching apparatus according to the present invention, and 11 is a CPU which is the center of the constituent operation. The control signal from the outside is supplied to the control line terminal 12 and the MJ.
It enters the changeover switch 15 through the (modular jack) terminal 14a and is added to the incoming circuit 16. Incoming circuit 16
Is input to the CPU 11 via the PB receiving circuit 17. The output signal of the CPU 11 is the PB transmission circuit 18,
Incoming circuit 16, changeover switch 15 and MJ terminal 14 (a)
Alternatively, it is output to either the control line terminal 12 or 13 via (b). The relay driver 19 operates according to the detection result of the control signal from the PB receiving circuit 17 by the CPU 11 to control the switch 20 so that the MJ terminal 21 for the incoming line is transferred from the MJ terminal 22 on the normal terminal side to the M for the emergency call system.
Switch connection to J terminal 23. In this connection state, the lamp of the line display LED 26 displays "normal terminal" or "emergency call system". The connection circuit 25 includes a power supply line and is connected to the outside. The return switch 24 restores the line MJ terminal 21 from the MJ terminal 23 to 22.
It is used when controlling the relay driver 19 and the switch 20. Further, by pressing the return switch 24 for 5 seconds or more, the relay driver 19 is activated to connect the line MJ terminal 21 to the normal terminal side MJ terminal 2.
It can be used as a "manual switching" for switching and connecting from 2 to the MJ terminal 23 for the emergency call system.

FIG. 5 shows the external appearance of a specific structure of the line switching device according to the present invention.
(B) has shown the front side. Here, power cord 31
Is used by connecting it to a power outlet of AC100V. The fuse holder 32 accommodates a 4A glass tube mini fuse. The service outlet 33 for connection is an outlet of AC100V of power supply when this device is connected (plurality) and used. The personal computer outlet 34 is energized when switching the AC100V line for the personal computer of the emergency call system. The return switch 35 is pressed at the time of return (switchback) after line switching. The switch has a guard cover. The control line modular jack 36 has "line-in" when connecting to the control line of this device and "emergency" when connecting to the control line of the emergency notification system. The connection input connector 37 is an input for control when the present apparatus is connected and used. Connection output connector 38
Is an output for control when the present apparatus is used in combination. When the power of the device is turned on by the power lamp 39, the green LED lights up. Monitor lamp (normal terminal) 40
Red LED when the line is normally connected to the terminal
Lights up. Monitor lamp (emergency call system) 41
Illuminates the red LED when the line is connected to the emergency call system. Modular jack 42 for line connection
Is an input terminal of a telephone line used for switching in this device.
The normal terminal modular jack 43 is connected to the terminal before switching. Modular jack for emergency call system 44
Connects to the line of the emergency call system after switching.

FIG. 6 shows a connection mode in the case where this device is used alone, and there are four switched lines.

FIG. 7 shows a connection mode when two units of this apparatus are connected and used, and the switched lines are 4 × 2 = 8 lines. 4 × 5 by connecting 5 units with the same configuration
= 20 lines can be switched.

[0013]

As described in detail above, according to the device of the present invention, it is possible to maintain high usage efficiency of terminal equipment such as an emergency call system connected to a subscriber's line, especially in the event of a disaster. Therefore, it is expected that it can be applied to an emergency call system in particular to improve the use efficiency of the entire communication system in the event of a disaster, and will exert an immeasurable effect in disaster countermeasures, and its practical effect is extremely large.

[Brief description of drawings]

FIG. 1 is a block diagram for explaining a usage mode of a device of the present invention.

FIG. 2 is a block diagram for explaining a mode of use of the device of the present invention.

FIG. 3 is a block diagram for explaining a mode of use of the device of the present invention.

FIG. 4 is a block diagram showing an embodiment of the device of the present invention.

FIG. 5 is a rear view (a) and a front view (b) showing an external structure example of the device of the present invention.

FIG. 6 is a connection diagram showing a usage example of one device of the present invention.

FIG. 7 is a connection diagram showing an example of use of two devices of the present invention.

[Explanation of symbols]

1 Line switching device 2 Terminal in normal times (first terminal equipment) 3 Line terminal for terminals in normal times 4 Communication equipment (second terminal equipment) 5 such as emergency call system used during non-normal times 5 Normal times Terminal line terminal 6 used for other than 6 Control line terminal 7 Communication line terminal 11 CPU 12, 13 Control line terminal 14a, 14b, 21, 22, 23 MJ terminal 15 Switch 16 Incoming circuit 17 PB receiving circuit 18 PB transmitting circuit 19 relay driver 20 switch 24 return switch 25 connection circuit 26 line display LED 31 power cord 32 fuse holder 33 connection service outlet 34 personal computer outlet 35 return switch 36 control line modular jack 37 connection input connector 38 connection output connector 39 power lamp 40 , 41 Monitor lamp 42 Line necessity modular jack 43 modular jack for normal modular jack 44 emergency call system for terminal

Claims (2)

[Claims] 1. A first terminal line terminal connected to a first terminal device used at a normal time, and a second terminal connected to a second terminal device used at a time other than the normal time. Line terminal, a control line terminal for accommodating a control subscriber line, a communication line terminal for accommodating a communication subscriber line, and normally the communication line terminal as the first terminal line terminal. Changeover switch means for connecting and connecting the communication line terminal to the second terminal line terminal when a predetermined switching signal arrives from the control subscriber line to the control line terminal, and the changeover connection. A line switching device comprising: a restoration unit that restores and connects the established communication line terminal to the first terminal device. 2. The line according to claim 1, wherein the restoration means is configured to make the restoration connection by a predetermined restoration signal coming from the control subscriber line to the control line terminal. Switching device.