JPH0879400A - Emergency notice device - Google Patents

Abstract

PURPOSE: To enable the emergency notice device to make automatic reply even in a case where an externally added telephone set having an automatic reply function such as an automatic answering telephone set is connected to the emergency notice device provided with an automatic reply function for telecontrol or online maintenance. CONSTITUTION: The emergency notice device 1 detects as incoming call signal and a speech current detection means 6 detects that an externally added telephone set 7 has responded. Then a telephone line 8 is monitored, and in the case where a control signal reception means 5 receives a prescribed control signal, a changeover means 2 switches the telephone line 8 to its own NCU 3 for automatic reply.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emergency call device 1 for making an emergency call through a telephone line 8, and more particularly to an emergency call device 1 having an automatic response function for telecontrol and online maintenance.

[0002]

2. Description of the Related Art Conventionally, there is an emergency notification device having an automatic response function of this kind as shown in FIG. That is, since the emergency notification device 1a rarely uses the telephone line 8, the external telephone 7 is usually connected via an external connection terminal or the like not shown, and the switching means 2a connects the telephone line 8 as needed. , NCU of the external telephone 7 or emergency communication device 1a (N etwork C ontrol U
nit) 3 is switched to use. Further, the emergency notification device 1a has an incoming call detecting means 4 connected to the telephone line 8, and when receiving an incoming signal of a predetermined time or a predetermined number of times, the switching means 2a is switched to cause an automatic response by the NCU 3. And exchange data by communicating with the caller.

For example, if the emergency call device 1a is a guide phone, the contents of the communication include checking the current state of the emergency call device 1a by notifying the presence / absence of abnormality of the connected sensor by voice synthesis. The telephone number of an emergency report destination stored in the emergency report device 1a is changed by remote operation.

[0004]

However, as described above, in order for the emergency notification device 1a to automatically respond, it is necessary to receive incoming signals for a fixed time or a specified number of times. When the attached telephone 7 is an answering machine or the like, before the emergency call device 1a automatically answers,
Since the external telephone 7 responds, the problem arises that the emergency notification device 1a cannot respond.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an automatic response even if a device having an automatic response function such as an answering machine is connected as the external telephone 7. To provide a possible emergency notification device 1.

[0006]

In order to achieve the above object, the present invention provides an emergency call device 1 having an automatic answering function for telecontrol and online maintenance. NCU
Switching means 2 for connecting the telephone line 8 to either
And a call current detecting means 6 which is between the switching means 2 and the external telephone 7 to detect the presence or absence of a talking state of the external telephone 7, and a telephone line 8 side from the switching means 2 is connected to the telephone line 8. The incoming call detecting means 4 and the control signal receiving means 5 are provided. After the incoming call detecting means 4 detects the incoming call signal, the control signal is detected by the call current detecting means 6 during the call state of the external telephone 7. When the receiving means 5 receives a predetermined control signal, the switching means 2 is switched from the external telephone 7 to the NCU 3 in the emergency notification device 1.

[0007]

The call current detecting means 6 detects the call current of the external telephone 7. Further, the incoming call detecting means 4 detects an incoming call signal from the telephone line 8, and the control signal receiving means 5 identifies and receives a specific control signal for the emergency notification device 1. The NCU 3 is generally called a network controller,
Equipped with the functions required for automatic response, it performs data communication and calls with the caller.

Therefore, even if the external telephone 7 responds first, the call current detecting means 6 detects that the external telephone 7 is in a call, so that the external telephone 7 responds first. At this time, the telephone line 8 is monitored, and when the control signal receiving means 5 detects a signal for calling the predetermined emergency notification device 1, the switching means 2 is switched to the NCU 3 on the emergency notification device 1 side. Allows automatic response.

[0009]

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 diagram showing a basic configuration of an embodiment of the present invention. In FIG. 1, 1 is an emergency call device, 2 is switching means, 3 is NCU, 4 is incoming call detecting means, 5 is control signal receiving means, 6 is call current detecting means, 7 is an external telephone, and 8 is a telephone line. Shows.

The telephone line 8 is connected to the switching means 2, the incoming call detecting means 4 and the control signal receiving means 5 in the emergency notification device 1. Further, an external telephone 7 is connected to the emergency notification device 1 via an external connection terminal or the like, and the telephone line 8 is switched by the switching means 2 to the external telephone 7 or the NCU 3 in the emergency notification device 1. The telephone current detecting means 6 is connected between the external telephone 7 and the switching means 2.

The call current detecting means 6 is for detecting the call current of the external telephone 7. Specifically, the existing call current detecting circuit used for the interface of the exchange apparatus is used, for example, a photo sensor. A circuit using a coupler or the like is known. The incoming call detection means 4 is for detecting an incoming call signal from the telephone line 8, and specifically, an incoming call signal detection circuit built in an ordinary telephone device or the like is used. The control signal receiving means 5 detects and receives a predetermined control signal for calling the emergency notification device 1 from the telephone line 8, and in this embodiment, the method of receiving the ID signal by the DTMF signal is adopted. Therefore, the control signal receiving means 5 is provided with the DTMF signal detection circuit. The switching means 2 switches the telephone line 8, and a contact switch, a non-contact switch or the like as switching means used in a general telephone or an exchange is used. The NCU 3 has a function of controlling the telephone line 8 or the like in order for the emergency call device 1 to make an emergency call or an automatic response, and sends data to a calling party or makes a necessary call.

Next, the operation of the present invention will be described. FIG.
Is a flowchart showing the operation of the present invention. First, since the emergency notification device 1 rarely normally uses the telephone line 8, the switching means 2 connects the telephone line 8 to the external telephone 7. When an incoming call is received from the outside (S1), the incoming signal is detected by the incoming call detecting means 4 (S2), and the external telephone 7 automatically answers because it is an answering machine (S3). When the external telephone 7 responds, the call current of the external telephone 7 flows, and the call current detecting means 6 detects this and the emergency call device 1 confirms (S4), and the telephone line 8 receives a control signal. It is monitored by the means 5 (S5). Then, when the control signal receiving means 5 receives a predetermined ID signal by the DTMF signal which is a control signal (S6), the emergency notification device 1 switches the switching means 2 to its own NCU 3 (S7). Then, the emergency notification device 1 automatically responds and performs necessary communication (S8).

In this way, the emergency call device 1 can make an automatic response even if the external telephone 7 is an answering machine. It is needless to say that the present embodiment is merely an example, and various modifications can be made without departing from the spirit of the present invention.

[0014]

As described above, according to the present invention, an emergency call device 1 which can normally use a device having an automatic answering function such as an answering machine as the external telephone 7 and can also exert the automatic answering function when needed 1 The emergency notification device 1 can be used more widely.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing a conventional example.

FIG. 3 is a flowchart showing the operation of the embodiment of the present invention.

[Explanation of symbols]

 1, 1a Emergency notification device 2, 2a Switching means 3 NCU 4 Incoming call detecting means 5 Control signal receiving means 6 Call current detecting means 7 External telephone 8 Telephone line

Claims (1)

[Claims] 1. An emergency notification device (1) having an automatic response function for telecontrol and online maintenance.
In the above, the switching means (2) for connecting the telephone line (8) to either the external telephone (7) or the NCU (3) in the emergency notification device (1), and the switching means (2) Call current detection means (6) connected between the external telephone (7) and detecting that the external telephone (7) is in a call state.
And an incoming call detecting means (4) directly connected to the telephone line (8) without passing through the switching means (2) and a control signal receiving means (5), the incoming call detecting means (4) being an incoming call signal. After detecting the call, the call current detecting means (6) detects that the external telephone (7) is in a call, and the control signal receiving means (5) determines whether the external telephone (7) is in a call. An emergency notification device characterized by switching the switching means (2) from an external telephone (7) to an NCU (3) in the emergency notification device (1) when a control signal is received.