JPH01222559A - Receiver for guard information - Google Patents

Abstract

PURPOSE:To use different kinds of terminal equipments in a receiver of same guard information by selecting either a mutli-frequency signal transmission/ reception means or a MODEM signal transmission/reception means so as to transmit/receive a signal suitable for the terminal equipment. CONSTITUTION:A single signal sending means 50, PB signal transmission/ reception means 60, 70 and a MODEM signal transmission/reception means 80 are provided on the receiver. Moreover, a selection means 90 is provided, which selects either the MODEM signal transmission/reception means or the multi-frequency transmission/reception means so as to detect a reply signal from a terminal equipment after the transmission of a single frequency signal via a communication line and so as to transmit/receive a signal suitable for the terminal equipment. Thus, it is possible to accommodate guard information from various kinds of terminal equipments with different communication mode to the receiver and considerable efficiency is attained from the standpoint of operation and the management of guard monitoring job.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a security information receiving device, and particularly to a device for receiving security information (intrusion, fire, gas leak, etc.) sent from a terminal device via a subscriber telephone line. This invention relates to a security information receiving device that automatically receives, displays, and prints security information. .

[Conventional technology]

Conventionally, this type of security information receiving device has a fixed communication mode or signal transmission/reception means with a terminal device.

[Problem to be solved by the invention]

In the conventional security information receiving device described above, the means for transmitting and receiving signals to and from the terminal device is fixed, and the terminal devices that can receive signals are limited. The only way to do so is to replace it with a terminal device of the same type, and if there is no terminal device of the same type, there is a drawback that it will seriously impede security operations.

[Means to solve the problem]

The security information receiving device of the present invention is a security information receiving device that automatically receives, displays, and prints security information such as intrusion, fire, and gas leak sent from a terminal device via a communication line. A single signal transmitting means for transmitting a single frequency signal to the communication line, a multifrequency signal transmitting and receiving means for transmitting and receiving a multifrequency signal, and a modem that transmits and receives a modem signal that requires a modem for transmitting and receiving signals. a signal transmitting/receiving means; and a signal transmitting/receiving means configured to transmit the single frequency signal to the terminal device via the communication line, detect a response signal from the terminal device, and send/receive a signal suitable for the terminal device. and selecting means for selecting either the signal transmitting/receiving means or the modem signal transmitting/receiving means.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 (
a), (b), (C), and (d) are the transmission and reception timings of signals of this embodiment for determining the communication mode between the security information receiving device of this embodiment and the terminal device shown in FIG. 1, respectively. It is a figure showing an example.

In FIG. 1, the present embodiment includes a line corresponding section (hereinafter referred to as LC) 20 that interfaces with a subscriber telephone line 10 connected to a terminal device (not shown), and a line support unit (hereinafter referred to as LC) 20 that interfaces with a subscriber telephone line 10 connected to a terminal device (not shown), and a call from the terminal device via the subscriber telephone line 10. An incoming call detection unit (hereinafter referred to as DET) 30 that detects a signal and sends out a detection signal, a single tone generation unit (hereinafter referred to as ○SC) 50 that generates and transmits a single frequency single tone, and a multi-frequency signal (hereinafter referred to as ○SC) A PB signal receiving unit (hereinafter referred to as PBREC) 60 receives a PB double signal (hereinafter referred to as PB double signal), and a PB signal transmitting unit (hereinafter referred to as P
BSND) 70, a modem communication unit (hereinafter referred to as MODEM) 80 that transmits/receives and modulates modem signals that require a modem to transmit and receive signals to and from the terminal device (hereinafter referred to as MODEM), and a display unit (hereinafter referred to as MODEM) that displays received information. (denoted as DSP) 100,
A printing unit (hereinafter referred to as PT) 110 that prints received information, a central control unit (hereinafter referred to as CPU) 90 that controls the entire embodiment, and a signal suitable for the terminal device can be transmitted and received under the control of the CPU 90. oSC50, PBREC
60, PBSND70. Switch MODEM80 and LC
20 and a connection switch (hereinafter referred to as SW) 40 for connection.

FIG. 2(a) shows an example of the transmission/reception timing of this embodiment when there is no response from the terminal device, and FIG. 2(b) shows an example of the transmission/reception timing of this embodiment when the terminal device responds with a PB double signal after transmitting a single tone. An example of the timing of communication mode B is shown in FIG. 3(C).
3(d) shows an example of the timing of communication mode C in this embodiment when the terminal device responds with the PB doubled signal after transmitting a single tone, and FIG. An example of the timing of communication mode D of this embodiment is shown when the terminal device responds with a modem signal.

Next, the operation of this embodiment will be explained.

Information from the terminal device first begins with a ringing signal on the subscriber telephone line 10. The call signal is sent to DET3 via LC20.
0, and if detected by DET 30, it is notified to CPU 90 via incoming signal line 120. CPU90
In response to the notification, sends a line closing signal to the LC 20 via the open/close signal line 130, and the LC 20 closes the subscriber telephone line 10.

As a result, a line path is formed between the terminal device and the security information receiving device of this embodiment, and communication becomes possible.

Thereafter, the CPU 90 controls the SW 40 using the control line 140 to output 03C50, PBREC60, PBSND70. M.O.
Select the DEM 80, communicate with the terminal device using a signal compatible with the terminal device, display the received information on the DSPloo according to the received information, and print the information on the PTIIO.

If the communication is completed normally, the CPU 90 will open/close signal line 1.
30, and LC20 sends a line release signal to subscriber telephone line 1.
0 is released to complete the series of automatic reception operations and return to the state of waiting for a call signal.

Next, FIG. 1 and FIGS. 2(a) and 2(b) show the operation when determining the communication mode of this embodiment.

This will be explained using (C) and (d).

In FIG. 2(b), when the present embodiment detects an incoming call at the arrival time 1 based on the ringing signal of the subscriber telephone line 10, it first sends out a single tone 2 twice. If the PB signal 4 is received from the terminal device within t1 time after the second transmission of the single tone 2, the communication mode of this embodiment becomes B, and if the reception is completed normally, the single tone 2 is transmitted once at the end. Terminate communication.

In Figure 2 (C), if the single tone 2 is sent twice, t1
If the PB signal 4 cannot be received within the time, then a specific PB signal 3 is sent out from this embodiment.

If the PB signal 4 is not received from the terminal device within t2 hours after sending this PB double signal, the communication mode of this embodiment becomes C, and if the reception is completed normally, the specific PB signal 3 is sent once again. Terminates the sent communication.

In Fig. 2(d), the single tone 2 is sent twice and then t1
After a certain period of time, a specific PB signal 3 is sent out, and if the PB signal 4 cannot be received within time t2, then the modem signal 5 is sent out from this embodiment. If communication is possible with the terminal device using this modem signal 5, the communication mode of this embodiment becomes D, and the line is released when communication is normally completed. In this case, if modem communication is not possible with the terminal device even after time t3 has elapsed, the subscriber telephone line 1° is forcibly opened.

In FIG. 2(a), the present embodiment transmits a single tone 2 twice, then transmits a specific PB signal 3 11 hours later, further transmits a modem signal within a time t2, and then transmits a modem signal after a time t5. If there is no normal signal response, the subscriber telephone line 1o is forcibly opened at the opening point 6.

〔Effect of the invention〕

As explained above, the present invention provides a single signal transmitting means, a PB signal transmitting/receiving means, a modem signal transmitting/receiving means, and a selection method that selects these means to match the transmission signal of the terminal device depending on the communication mode between the terminal device. By providing the means, it is possible to receive the same security information from various terminal devices with different communication modes into the receiving device, and it is possible to significantly improve efficiency in the operation and management of security monitoring operations. There is an effect.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 (
a), (b), (C), and (d) are the transmission and reception timings of signals of this embodiment for determining the communication mode between the security information receiving device of this embodiment and the terminal device shown in FIG. 1, respectively. It is a figure showing an example. 1... Time of arrival, 2... Single tone, 3.4... Multi-frequency signal (P, B signal), 5... Modem signal, 6... Time of opening, 10... Joining Telephone line, 20... Line correspondence section (LC), 30... Incoming call detection section (DET), 40.
...Connection switch (SW), 50...Single tone generator (
O3C), 60...PB signal receiving section (PBREC),
70...PB signal transmitter (PBSND), 80...
Modem communication unit (MODEM), 90...Central processing unit (CPU), 100...Display unit (DSP>, 110.
...Printing section (PT), 120...Incoming signal line, 130
... Opening/closing signal line, 140... Control line.

Claims (1)

[Claims] In a security information receiving device that automatically receives, displays, and prints security information such as intrusion, fire, gas leak, etc. sent from a terminal device via a communication line, a single frequency signal is transmitted to the communication line. a single signal transmitting means for transmitting a signal; a multifrequency signal transmitting and receiving means for transmitting and receiving a multifrequency signal; a modem signal transmitting and receiving means for transmitting and receiving a modem signal that requires a modulator/demodulator for transmitting and receiving signals; The multi-frequency signal transmitting/receiving means or the modem signal transmitting/receiving means detects a response signal from the terminal device after transmitting the single frequency signal via a communication line so that a signal suitable for the terminal device can be transmitted/received. A security information receiving device comprising a selection means for selecting a security information.