JPH11261735A - Information transmitter and receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To call an information transmitter-receiver from the outside without affecting on a communication terminal equipment when the information transmitter-receiver and the communication terminal equipment use a telephone line in common by controlling the communication terminal equipment so as not to receive a calling signal from an exchange when a call originator's telephone number is a prescribed number. SOLUTION: This communication terminal equipment is controlled so as not to receive a calling signal from an exchange when the received telephone number of a call originator is a prescribed number. When the received telephone number is not the prescribed one on the other hand, the received telephone number of the call originator is transmitted to the communication terminal equipment and the communication terminal equipment is made possible to receive a calling signal from the exchange. Namely, this information transmitter-receiver 1 compares the telephone number of the call originator received by a modem part 12 with the previously stored telephone number of security center equipment by a control part 13 and at the time of judging it as an incoming call from the security center device, interrupts the DC loop of a telephone line 5 by a network controlling part 11. At the time of detecting the interruption of the DC loop of the line 5, then, the exchange sends the calling signal to the line 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information transmitting and receiving apparatus for transmitting and receiving various kinds of information using a telephone line, and more particularly to an information transmitting and receiving apparatus such as a telephone having a caller ID notification service. The present invention relates to an information transmitting / receiving device that can call the information transmitting / receiving device without affecting the communication terminal when a telephone line is shared.

[0002]

2. Description of the Related Art In a security system using a telephone line, for example, various sensors for detecting intruders, fires, gas leaks and other abnormalities are installed in an office or the like to be guarded, and these abnormal information is transmitted to the telephone line. Security systems for sending information to security centers have become widespread.

In such a security system using a telephone line, in order to effectively use the telephone line, an alarm device and a communication terminal such as a telephone or a facsimile machine already installed in an office or the like to be guarded include: The telephone line may be shared.

That is, the communication terminal can be used at all times, and the telephone line is switched to the alarm device only when the alarm device of the security system transmits a security signal to the security center.

In some cases, an alarm device is called from a security center or the like. This is, for example, the case where time information is transmitted from a security center, or the case where information regarding a counselor who copes when an abnormality occurs is signaled to the alarm device.
In this case, a selection signal is transmitted from the security center to transmit a call signal to the alarm device, and the alarm device receives the call signal and automatically responds.

[0006]

As described above, since the telephone line is shared by the communication terminal and the alarm device, once the call signal is received and answered by the alarm device, the alarm device and the security center communicate with each other. When connected, the alarm device communicates with the security center when receiving a confirmation signal from the security center. However, if the confirmation signal from the security center is not received, it is determined that the call is from a place other than the security center, a call signal is sent to the communication terminal, and the caller is asked to wait for a while. Please send a message. " If the caller is not a security center but a data communication device such as a facsimile device, the alarm device sharing the telephone line responds to a call signal from the data communication device, and the caller's data communication is performed. The device may not be able to handshake with the communication terminal.

Furthermore, in the case of a call made by a third party, even if no one answers unattended, the information transmitting and receiving device sharing the telephone line automatically responds to the incoming signal once. There was a problem that a fee was charged.

Further, even if the communication terminal device such as a telephone is a device compatible with the caller ID notification service, if the information transmitting / receiving device automatically responds, there is a problem that the caller number is not displayed on the telephone. .

In view of the above-mentioned problems, the present invention provides a security center without any influence on a communication terminal device when an information transmitting / receiving device such as an alarm device and a communication terminal device such as a telephone share a telephone line. It is an object of the present invention to provide an information transmitting / receiving device capable of calling the information transmitting / receiving device from outside such as.

[0010]

SUMMARY OF THE INVENTION The present invention is an information transmitting and receiving apparatus for sharing a telephone line connected to an exchange with a communication terminal, and receiving caller telephone number information from the exchange via the telephone line. Caller telephone number receiving means, storage means for storing a predetermined telephone number, and pseudo replacement means for sending out the caller telephone number received by the caller telephone number receiving means, If the number is a predetermined telephone number, control is performed so that the communication terminal does not receive a call signal from the exchange. If the received caller telephone number is not the predetermined telephone number, the communication terminal is controlled. The transmitting and receiving apparatus transmits the received caller's telephone number to the communication terminal, and enables the communication terminal to receive a call signal from the exchange.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS.

FIG. 1 shows an overall configuration of, for example, a security system to which the information transmitting / receiving apparatus of the present invention is applied.

Reference numeral 1 denotes an information transmission / reception device according to the present invention, which is installed in a house or the like to be guarded.

Reference numeral 3 denotes a telephone for use in a telephone call, which is installed in the house. This telephone has a liquid crystal display and can display a caller number.

Reference numeral 5 denotes a telephone line for connecting the information transmitting / receiving apparatus 1 and the exchange 4, and 6 denotes a security center apparatus 2 and the exchange 4
Is a telephone line for connecting the other telephone 7 and the exchange 4.

Reference numeral 2 denotes a security center device, which transmits and receives information via a telephone line 5, an exchange 4, and a telephone line 6.
And transmits / receives signals such as security information to / from the information transmitting / receiving device 1.

Reference numeral 4 denotes an exchange of a telephone company, and reference numeral 7 denotes another telephone connected to the exchange 4 by a telephone line.

Here, the telephone line 8 and the telephone 7 are
Although it does not constitute a security system, it is illustrated to explain the operation of the information transmitting / receiving device 1.

FIG. 2 is a functional block diagram of the information transmitting / receiving apparatus 1.

Reference numeral 11 denotes a telephone line connected to the telephone line 5.
A network control unit that performs polarity inversion and polarity detection, detection of a call signal and an activation signal transmitted from the exchange 4, detection of a DC loop state of the telephone line 5, transmission of a dial pulse, and the like.

Reference numeral 12 denotes a device for converting the information transmitted from the information transmitting / receiving device 1 to the security center device 2 into a modem signal of a predetermined format and transmitting the same, and receiving the modem signal received from the security center device 2 or the exchange 4. This is the modem section.

A line switching unit 14 switches the connection of the telephone 3 to one of the telephone line 5 and the pseudo switching unit 15.

Reference numeral 15 denotes a pseudo switching unit, which is a pseudo voltage supply unit 152 for supplying a voltage of, for example, 48 V to the telephone set 3 via the line switching unit 14, a signal transmission unit 153 for transmitting a caller telephone number signal, and an information reception starting terminal. It is composed of an activation signal transmitting section 154 for transmitting an activation signal, but the state of the line when the pseudo-exchange section 15 and the telephone 3 are connected, that is, the DC loop is broken when the telephone 3 is on-hook or the DC loop is disconnected when the telephone 3 is off-hook. It is composed of a line status detecting unit 151 for detecting which of the two is closed.

Reference numeral 16 denotes a display unit, which is constituted by, for example, a liquid crystal display, and displays a caller's telephone number, the operation status of the information transmitting / receiving device, and the like, which will be described later.

An operation unit 17 includes a push button switch, a dip switch, and the like, and is used for setting an operation mode and the like of the information transmitting and receiving apparatus 1.

Reference numeral 18 denotes an alarm signal input unit to which detection signals from an intrusion detection sensor, a fire detection sensor, a gas leak detection sensor, and the like (not shown) are input when the information transmitting / receiving device 1 is used for a security system.

Reference numeral 13 denotes a control unit which controls the operation of each unit described above, stores the telephone number of the security center device,
The modem unit 12 compares the caller's telephone number received from the exchange 4 with the caller's telephone number.

Next, an operation when the security center apparatus 2 calls the information transmitting / receiving apparatus 1 (that is, when the information transmitting / receiving apparatus 1 responds to the call) will be described with reference to FIG.

The line switching unit 14 connects the telephone 3 and the pseudo voltage supply unit 15. Therefore, the telephone 3 is disconnected from the telephone line 5 and the pseudo voltage supply units 152 to 4
A voltage of 8V is supplied. The pseudo voltage supply unit 15
The polarity of the voltage supplied to the telephone 3 from is controlled by the control unit 13.

The security center device 2 includes the information transmitting / receiving device 1
Is transmitted to the exchange 4.

In the exchange 4, the polarity of the voltage applied to L1 and L2 (not shown) of the telephone line 5 of the information transmitting / receiving device 1 is inverted. Next, the exchange 4 sends an information receiving terminal start signal (AC signal with a 16 Hz 0.5 second on, 0.5 second off cycle) to the telephone line 5. The information transmitting / receiving device 1
When the network control unit 11 detects this information receiving terminal activation signal, the DC loop of the telephone line 5 is closed. Exchange 4
Closing the DC loop of telephone line 5 (Fig. 3 Primary response signal)
Detects that the information transmitting / receiving device 1 has responded, and sends out the telephone number (caller telephone number) of the security center device 2 as a signal in a predetermined format.

The information transmitting / receiving apparatus 1 compares the caller telephone number received by the modem section 12 with the telephone number of the security center apparatus 2 stored in the control section 13 in advance, and receives an incoming call from the security center apparatus 2. If it is determined that there is, the network control unit 11 cuts off the DC loop of the telephone line 5. (FIG. 3
When the exchange 4 detects the break of the DC loop of the telephone line 5, the exchange 4 next sends a call signal (16 Hz, 1 second on / 2 seconds off cycle) to the telephone line 5.

Since the telephone 3 is disconnected from the telephone line 5 by the line switching unit 14, the telephone 3 does not receive the call signal and the bell of the telephone 3 does not ring.

When the network control unit 11 detects the call signal, the information transmitting / receiving device 1 closes the DC loop of the telephone line 5 again. (FIG. 3 Secondary Response Signal) When the exchange 4 detects that the DC loop of the telephone line 5 is closed, the exchange 4 inverts the polarities of the telephone lines 5 and 6 so that the communication between the security center apparatus 2 and the information transmitting / receiving apparatus 1 is performed. Make the call available.

Thereafter, security information and the like are transmitted and received between the security center device 2 and the information transmitting / receiving device 1. When the transmission / reception of the security information is completed, the security center device 2 and the information transmission / reception device 1 break the DC loop and return to the initial state. (FIG. 3 disconnection signal) Next, with reference to FIG. 4, an operation in a case where there is a call to the telephone 3 via the information transmitting / receiving device 1 from another telephone 7 other than the security center device 2 will be described.

Until the information transmitting / receiving apparatus 1 receives the caller telephone number information from the exchange 4, the operation is the same as described above.
Description is omitted.

The information transmitting / receiving device 1 compares the caller telephone number received by the control unit 13 with the telephone number of the security center stored in advance, and if it is determined that the call is from a source other than the security center device 2, once The caller number is stored.

Next, the information transmitting / receiving apparatus 1
5, the polarity of the voltage supplied from the pseudo voltage supply unit 152 is inverted. As a result, the telephone 3 enters a state of waiting for reception of the information receiving terminal activation signal. Next, the activation signal transmitting unit 154 of the information transmitting / receiving device 1 transmits the information receiving terminal activation signal (1
6Hz 0.5sec ON, 0.5sec OFF cycle AC signal)
To the telephone 3. When detecting the information receiving terminal activation signal, the telephone 3 closes the DC loop of the line connected to the telephone 3. The line state detecting unit 151 of the information transmitting / receiving apparatus 1 detects the closing of the DC loop of the line (the primary response signal in FIG. 3), and the caller telephone number received and stored from the exchange 4 is transmitted from the signal transmitting unit 153 to the telephone 3. It is transmitted in a signal of a predetermined format.

When the telephone 3 receives the caller ID,
The received caller number is displayed on a display (not shown), the DC loop of the line is cut, and a reception completion signal is transmitted.

In the information transmitting / receiving apparatus 1, the reception completion signal from the telephone 3, that is, the disconnection of the DC loop, is
1, the network control unit 11 cuts off the DC loop of the telephone line 5 and transmits a reception completion signal to the exchange 4, and the line switching unit 14 connects the telephone 3 and the telephone line 5. Switch as follows.

When the exchange 4 detects the disconnection of the DC loop of the telephone line 5, it sends out a calling signal to the telephone line 5.

The calling signal is input to the telephone 3 via the telephone line 5, and the telephone 3 rings.

The user of the telephone 3 knows that the call has arrived by the ringing of the call bell, confirms the displayed caller ID, and picks up the receiver as in a normal call. When the handset is picked up, the telephone 3 closes the DC loop, and is ready to talk to the caller.

At this time, the exchange 4 inverts the voltage polarity of the telephone line 8 and reverses the voltage polarity of the telephone line 5.

When the call ends and the telephone set of the telephone 3 is returned, the DC loop of the telephone line 5 is cut off again. (FIG. 4
The disconnection signal) When the DC loop of the telephone line is cut off, the exchange 4 determines that the telephone conversation has ended, releases the capture of the telephone lines 5 and 8, and restores the voltage polarity of the telephone line 8.

At this time, in the information transmitting / receiving apparatus 1, the network control unit 11 detects the disconnection (cut signal) of the DC loop of the telephone line 5, and the line switching unit 14 switches the connection of the telephone 3 to the telephone line 5.
To the pseudo voltage supply unit 15.

Next, an operation for making a call from the telephone 3 will be described.

As described above, the telephone 3 is normally connected to the pseudo switching unit 15 via the line switching unit 14. Here, when the user of the telephone 3 picks up the receiver of the telephone 3 (ie, hooks up), the telephone 3 and the pseudo voltage supply unit 1
A DC loop between 5 is formed.

When the control unit 13 detects a DC loop by the line state detection 151, it drives the line switching unit 14 to connect the telephone 3 and the telephone line 5. After that, it operates as a normal telephone.

In the present embodiment, the modem section 12 and the signal transmitting section 153 are separately provided in the information transmitting / receiving apparatus 1. However, the present invention is not limited to this.
May be provided with a function of transmitting caller ID information, and a switching unit for selectively switching between the modem unit 12, the telephone line 5, and the telephone 3 may be separately provided.

As described above, according to the information transmitting / receiving apparatus of the present invention, it is possible to automatically answer a call from an external security center or the like without ringing the telephone sharing the telephone line. For calls from third parties other than those specified in advance, such as centers, there is no automatic response to the call signal, so that unnecessary telephone charges are not imposed on the third parties.

Also, for an incoming call to be automatically answered by the information transmitting / receiving device 1, an information receiving terminal activation signal is not input to the telephone 3, so that the telephone does not ring unnecessarily.

[0053]

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a security system to which an information transmitting / receiving device according to the present invention is applied;

FIG. 2 is a block diagram of an information transmitting / receiving apparatus according to the present invention.

FIG. 3 is an operation time chart of the information transmitting / receiving device according to the present invention.

FIG. 4 is an operation time chart of the information transmitting / receiving device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Information transmission / reception apparatus 11 ... Network control part 12 ... Modem part 13 ... Control part 14 ... Line switching part 15 ... Pseudo exchange part 151 ... Line state detection part 152. ..Pseudo voltage supply unit 153 ... Signal transmission unit 154 ... Start signal transmission unit 16 ... Display unit 17 ... Operation unit 18 ... Alarm signal input unit 2 ... Security center device 3. ..Phone 4 ・ ・ ・ Exchange 5,6,8 ・ ・ ・ Phone line 7 ・ ・ ・ Phone

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Claims (3)

[Claims] 1. An information transmitting / receiving apparatus for sharing a telephone line connected to an exchange with a communication terminal, comprising: a caller telephone number receiving means for receiving caller telephone number information from the exchange via the telephone line; Storage means for storing a predetermined telephone number, and pseudo-exchange means for transmitting the caller telephone number received by the caller telephone number receiving means, wherein the received caller telephone number is a predetermined telephone number In such a case, the communication terminal is controlled so as not to receive a call signal from the exchange, and if the received caller telephone number is not a predetermined telephone number, the communication terminal receives the caller telephone number received. Transmitting and receiving a call signal from the exchange at the communication terminal. 2. The information transmitting / receiving apparatus according to claim 1, further comprising switching means for connecting or disconnecting the telephone line and the communication terminal. 3. The information receiving apparatus according to claim 1, wherein said pseudo switching means further comprises a pseudo voltage supply section and a line state detecting section.