JP2001103174A - Interphone system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an interphone system that forms a speech path between a slave terminal and an external communication terminal upon the receipt of a call from the slave terminal in a transfer mode and that prevents a busy tone from the telephone network from being transmitted to the slave terminal when a speech is finished and the communication terminal hooks on. SOLUTION: The interphone system is provided with the slave terminal 1 having a speech means 11 and a call means 12, a master terminal 2 that has a speech means 22 and is connected to the slave terminal, and a transfer means 5 that is connected to the master terminal and automatically makes a call to the external communication terminal 7 via a telephone network 6. The transfer means has a configuration such that it automatically makes a call to the communication terminal when receiving a call from the slave terminal in a transfer mode to form a speech path between the slave terminal and the communication terminal, and interrupts the connection to the slave terminal so as to prevent a busy tone from reaching the slave terminal when a speech end detection means detects the termination operation by the communication terminal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for receiving a call from a slave terminal installed at a front door of a dwelling unit by a base unit terminal installed in the dwelling unit. The present invention relates to an intercom device that can be transferred to a terminal.

[0002]

2. Description of the Related Art Conventionally, a slave terminal having a communication unit including a speaker and a microphone has been installed at the entrance of a dwelling unit, and a master terminal having a communication unit also including a speaker and a microphone has been installed in a dwelling unit. There is known an intercom device in which both terminals are connected via a dedicated line.

In this intercom apparatus, when a visitor presses a call button of a slave terminal, a calling chime of the master terminal sounds, and in response, a resident responds at the calling section of the master terminal, and thereby the slave unit responds. The voice communication between the communication unit of the terminal and the communication unit of the master terminal can be performed.

[0004] Further, a TV camera is provided in the slave terminal, a monitor TV is provided in the master terminal, and the image of the visitor captured by the TV camera is displayed on the monitor TV, and the resident checks the state to provide a security function. Enhanced devices have also been proposed.

[0005] When a call is received from a child terminal while a resident is out of the office, the parent terminal automatically calls a communication terminal (such as an outgoing telephone or mobile telephone) registered in advance.
There has also been proposed an intercom device with a transfer function in which a visitor and a resident can communicate in real time by connecting a slave terminal and a communication terminal (for example, JP-A-6-164746). ).

[0006]

In a conventional intercom apparatus with a transfer function, when a call is received from a slave terminal while a transfer mode is set, an external communication terminal registered in advance by the master terminal is automatically set. A call is made and a communication path is formed between the slave terminal and the communication terminal.

[0007] However, when the communication terminal ends and the communication terminal goes on-hook, a busy tone generated from the telephone network is transmitted to the slave terminal, and as a result, it is known to the visitor that the call is from outside. There was a problem that would.

The present invention has been made to solve such a conventional problem. When a communication path is formed between a slave terminal and an external communication terminal in a transfer mode, the communication is terminated. It is an object of the present invention to provide an intercom apparatus in which a busy tone from a telephone network is not transmitted to a slave terminal even when a communication terminal goes on-hook.

[0009]

According to the present invention, there is provided an intercom apparatus comprising: a slave terminal having calling means and calling means; a master terminal having talking means and connected to the slave terminal; Transfer means for automatically calling an external communication terminal via a telephone network, wherein the transfer means automatically calls the communication terminal when receiving a call from the slave terminal in the transfer mode, and sets the slave terminal and Form a communication path between communication terminals,
When the call termination detecting means detects that the communication terminal has performed the call termination operation, the communication terminal is disconnected from the slave terminal to prevent the busy sound from reaching the slave terminal.

With this configuration, the transfer means receives the call from the slave terminal and forms a communication path between the slave terminal and the communication terminal, and thereafter detects that the communication terminal has performed the call termination operation. If detected by the means, the connection with the slave terminal is disconnected, and the busy tone from the telephone network is prevented from reaching the slave terminal.

Also, the intercom apparatus of the present invention automatically calls an external communication terminal via a telephone network which is connected to a slave terminal having a calling means and a calling means and which is connected to the slave terminal having a talking means. And a base unit terminal, and the base unit terminal
When a call is received from the slave terminal in the transfer mode, the communication terminal is automatically called to form a communication path between the slave terminal and the communication terminal, and that the call termination operation is detected by the communication end detection means by the communication terminal. Then, there is a configuration in which the connection with the slave terminal is cut off to prevent the busy tone from reaching the slave terminal.

With this configuration, the master terminal receives a call from the slave terminal, forms a communication path between the slave terminal and the communication terminal, and thereafter, terminates the call when the communication terminal performs a call termination operation. When the detection is performed by the detecting means, the connection with the slave terminal is cut off, and the busy tone from the telephone network is prevented from reaching the slave terminal.

Further, the call termination detecting means of the intercom apparatus according to the present invention includes a DT for detecting a specific push button signal transmitted when the communication terminal performs a call termination operation.
MF detection means.

With this configuration, when the communication terminal presses a specific push button, for example, the # button at the end of a call, a push button signal corresponding to the # button is transmitted. When this push button signal is detected by the DTMF detection means, This disconnects the connection with the slave terminal to prevent the busy tone from the telephone network from reaching the slave terminal.

[0015] The call termination detecting means of the intercom apparatus of the present invention is a disconnection signal detecting means for detecting a disconnection signal sent from the telephone network when the communication terminal performs a call termination operation.

According to this configuration, when the communication terminal goes on-hook at the end of a call, a disconnection signal is transmitted from the telephone network. When the disconnection signal is detected by the disconnection signal detecting means, the connection with the slave terminal is disconnected and the busy tone is output. Is prevented from reaching the slave terminal.

Further, the call termination detecting means of the intercom apparatus of the present invention is a busy tone detecting means for detecting a busy tone transmitted from the telephone network when the communication terminal performs a call termination operation.

With this configuration, when the communication terminal goes on-hook at the end of the call, a busy tone is transmitted from the telephone network. When the beginning of the busy tone is detected by the busy tone detecting means, the connection with the slave terminal is established. This disconnects the busy tone to prevent it from reaching the slave terminal.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS.

FIG. 1 is a block diagram showing an embodiment of an intercom apparatus according to the present invention. This device includes a child device terminal 1 installed at the entrance of a dwelling unit, a gate post, etc., a parent device terminal 2 installed in the dwelling unit, a dedicated line 3 connecting these two terminals, and a parent device via a dedicated line 4. And a transfer device 5 connected to the device terminal 2. Further, the transfer device 5 is connected to a communication terminal 7 via a telephone network 6.

The slave terminal 1 is provided with a communication unit 11 having a speaker and a microphone, a call button 12 pressed by a visitor to announce his / her intention, and a television camera 13 for imaging the visitor.

The master terminal 2 is connected to the slave terminal 1 via the dedicated line 3 and is connected to the transfer device 5 via the dedicated line 4, and a call having a speaker and a microphone. An operation including various parts such as a unit 22, an alarm 23 for sounding a ringing chime, a monitor television 24 for displaying an image captured by the television camera 13 of the slave terminal 1, and a transfer button for setting a transfer mode. Part 25
And The transfer button may be provided on the transfer device 5.

The transfer device 5 includes a telephone network interface (I / F) unit 51 connected to the telephone network 6, and the following units are connected to the telephone network I / F unit 51. That is, a control unit 52 connected to the control unit 21 of the master terminal 2 via the dedicated line 4, a voice guidance transmitting unit 53 for transmitting various voice guidance to the communication terminal 7, and various video guidance to the communication terminal 7. A video guidance transmitting section 54 to be transmitted, an automatic calling section 55 for automatically calling a communication terminal 7 registered in advance, a password setting section 56 for storing a password, and a disconnection signal detection for detecting a disconnection signal from the telephone network 6. Part 57,
Response signal detection unit 5 for detecting a response signal from telephone network 6
8. DT for detecting a push button signal from the telephone network 6
An MF (Dial Tone Multi Frequency) detecting unit 59 and a DT / BT detecting unit 60 for detecting a dial tone (DT: dial tone) or a busy tone (BT: busy tone) from the telephone network 6.

The communication terminal 7 also has a calling section 71 having a speaker and a microphone, an operation section 72 having dial buttons and various function buttons for inputting the telephone number of the called party, and displaying the telephone number of the called party and various kinds of guidance. The display unit 73 is provided.

Here, the master terminal 2 and the transfer device 5
Has been described above as a separate unit. However, the two units are integrally configured so that the master unit terminal has both the function of connecting to the slave unit terminal 1 and the function of transferring to the communication terminal 7. You may comprise.

Next, the operation of this embodiment will be described. First, an operation when the transfer setting button of the operation unit 25 is set to the non-transfer mode will be described.

In this case, when the visitor presses the call button 12 of the slave terminal 1, the call signal is transmitted to the control unit 21 of the master terminal 2 via the dedicated line 3. When receiving the calling signal, the control unit 21 controls the alarm 23 to sound a calling chime sound.

Resident responds to the ringing chime sound and the caller 22
When the response is made, the telephone unit 11 of the slave terminal 1 is connected to the telephone unit 11, and a voice call can be made between the telephone units 11 and 22. Also, power is supplied to the television camera 13 of the slave terminal 1,
The image captured by the television camera 13 is displayed on the monitor television 24 of the parent device terminal 2.

When the call is finished and the receiver is put on the call section 22, the communication path between the call section 11 and the call section 22 is cut off, and the power supply to the television camera 13 and the monitor television 24 is stopped.

Next, the operation when the transfer button of the operation unit 25 of the master terminal 2 is set to the transfer mode will be described with reference to the sequence diagram shown in FIG.

First, the visitor presses the call button 1 of the slave terminal 1.
2 (step S1), the control unit 21 of the base unit terminal 2 is pressed.
Receives the calling signal via the dedicated line 3 (step S
2) Control the annunciator 23 to make a ringing chime sound.

Since the transfer button of the operation unit 25 is set to the transfer mode, the control unit 21 of the master terminal 2 sends a transfer signal to the transfer device 5 (step S3). The transfer device 5 receiving the transfer signal controls the automatic calling unit 55 by the control unit 52, and transmits a call signal from the telephone network I / F unit 51 to the telephone network 6 (step S4).

When the DT / BT detecting section 60 of the transfer device 5 detects a dial tone from the telephone network 6 (step S5), the control section 52 controls the automatic calling section 55 to control the communication terminal 7 registered in advance. The dial signal indicating the subscriber number is transmitted to the telephone network I /
The data is transmitted from the F unit 51 to the telephone network 6 (step S6).

As a result, after the start signal and the start completion signal are transmitted and received between the exchanges of the telephone network 6, the communication terminal 7
Is transmitted (step S7), and a ringing tone (RBT) is transmitted to the transfer device 5 (step S8). Further, the control unit 52 controls the video guidance sending unit 54 and displays the slave terminal 1 on the display unit 73 of the communication terminal 7.
Then, a guidance signal for notifying that the transfer is from an image (for example, character display) is transmitted (step S9).

Next, if there is an off-hook in the communication terminal 7 (step S10), a response signal is sent out and the transfer device 5
Detects the response signal by the response signal detection unit 58 (step S11). Upon receiving the response signal, the transfer device 5 controls the voice guidance sending unit 53 by the control unit 52,
A guidance signal is transmitted to the communication unit 71 of the communication terminal 7 for notifying by voice that the transfer is from the slave terminal 1 (step S12).

As described above, the user of the communication terminal 7 recognizes that the transfer is from the slave terminal 1 based on the video guidance displayed on the display unit 73 and the voice guidance output from the communication unit 71. Can be.

The user of the communication terminal 7 presses a predetermined push button of the operation unit 72 when he / she wants to respond (step S13). Then, a push button (PB) signal corresponding to the push button is transmitted to the transfer device 5 (step S14). This PB signal is transmitted to the DT
The password is detected by the MF detection unit 59 and the
If the password matches the password registered in the password, the control unit 52 recognizes that there is a response intention.

Next, the control unit 52 of the transfer device 5 sends a connection signal to the control unit 21 of the master terminal 2 (step S1).
5), the communication unit 11 of the slave terminal 1 and the communication unit 7 of the communication terminal 7
A communication path is formed between the communication path 1 and the communication path 1 (step S16).

Next, when the call is terminated and a predetermined push button (for example, # button) is operated on the operation unit 72 of the communication terminal 7 (step S17), the PB signal is transferred via the telephone network 6. It is sent to the device 5 (step S18). The DTMF detection unit 59 of the transfer device 5
Upon detecting the signal, the control unit 52 of the transfer device 5 sends a disconnection signal to the control unit 21 of the parent device terminal 2 (step S1).
9). Therefore, here, the DTMF detection unit 59 functions as a call termination detection unit.

Next, the on-hook operation of the communication terminal 7 (step S20) causes a disconnection signal to be sent from the communication terminal 7 (step S21), and a busy tone to be sent from the telephone network 6 (step S22). Since the connection with the terminal 1 has already been disconnected (step S19), no busy tone is transmitted to the child terminal 1. Next, the transfer device 5 sends a disconnection signal to the telephone network 6 (step S23), and disconnects the communication path between the transfer device 5 and the communication terminal 7.

As described above, when a predetermined push button (for example, # button) is operated by the operation unit 72 of the communication terminal 7 at the end of the call, the transfer device 5 disconnects the connection with the slave terminal 1. The busy tone transmitted from the telephone network 6 by the subsequent on-hook operation of the communication terminal 7 can be prevented from being transmitted to the slave terminal 1.

Next, another example of the operation when the transfer button of the operation unit 25 of the master terminal 2 is set to the transfer mode will be described with reference to the sequence diagram shown in FIG. Note that the operation from step S1 to step S16 is the same as the operation shown in FIG. 2 described above, and thus detailed description will be omitted.

In step S16, a communication path is formed between the slave terminal 1 and the communication terminal 7, and after the communication is performed, if there is an on-hook in the communication terminal 7 (step S31), the communication terminal 7 transmits the call via the telephone network. Then, a disconnection signal is transmitted (step S32).

As shown in FIG. 4, the disconnection signal changes from the normal state to the reversal state for a short period of time t1 (0.4-0.
8s) The pulse is transmitted to the transfer device 5 as a reversal inversion pulse. Moreover, it is transmitted before the busy sound comes. In the figure,
Time t1 is a reversal timing, and time t2 is a reversal state guarantee time.

When the disconnection signal detecting section 57 detects the reversal pulse, the transfer device 5 sends a disconnection signal to the parent terminal 2 (step S33), and disconnects the connection with the child terminal 1. Therefore, here, the disconnection signal detection unit 57 functions as a call termination detection unit.

Next, a busy tone is transmitted from the telephone network 6 (step S34), but since the connection with the slave terminal 1 has already been disconnected (step S33), the busy tone is transmitted to the slave terminal 1. It is not sent. Next, the transfer device 5 sends a disconnection signal to the telephone network 6 (step S35),
The communication path between the transfer device 5 and the communication terminal 7 is disconnected.

In this manner, if there is an on-hook in the operation unit 72 of the communication terminal 7, the transfer device 5 detects the inversion pulse before the busy sound comes and disconnects the connection with the slave terminal 1. The busy tone transmitted from the telephone network 6 by the on-hook operation of the communication terminal 7 can be prevented from being transmitted to the slave terminal 1.

Next, another example of the operation when the transfer button of the operation unit 25 of the master terminal 2 is set to the transfer mode will be described with reference to the sequence diagram shown in FIG. Note that the operation from step S1 to step S16 is the same as the operation shown in FIG. 2 described above, and thus detailed description will be omitted.

In step S16, a communication path is formed between the slave terminal 1 and the communication terminal 7, and if the communication terminal 7 is on-hook after a call is made (step S41), a disconnection signal is transmitted from the communication terminal 7. Is performed (step S42).

Upon receiving the disconnection signal, the telephone network 6 sends a busy tone to the transfer device 5 (step S43). Transfer device 5
When the DT / BT detection unit 60 detects a busy tone, it immediately sends a disconnection signal to the parent device terminal 2 (step S4).
4), the connection with the slave terminal 1 is disconnected. Therefore, here, the DT / BT detection unit 60 functions as a call termination detection unit. Next, the transfer device 5 sends a disconnection signal to the telephone network 6 (step S45), and disconnects the communication path between the transfer device 5 and the communication terminal 7.

When the on-hook operation is performed on the operation unit 72 of the communication terminal 7, the transfer device 5 detects the beginning of the busy tone and disconnects the connection with the slave terminal 1, so that the on-hook operation of the communication terminal 7 is performed. Thus, the busy tone transmitted from the telephone network 6 can be prevented from being transmitted to the slave terminal 1.

[0052]

As described above, according to the present invention, after a call is received from a slave terminal in a transfer mode to form a communication path between the slave terminal and the communication terminal, the communication terminal performs a call termination operation. Is detected by the call termination detecting means, the transfer device or the master terminal immediately disconnects the connection with the slave terminal, so that the busy tone from the telephone network can be prevented from reaching the slave terminal.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of an intercom apparatus according to the present invention.

FIG. 2 is a sequence diagram for explaining the operation of the present invention.

FIG. 3 is a sequence diagram for explaining another operation of the present invention.

FIG. 4 is a waveform diagram of a cutting signal shown in FIG. 3;

FIG. 5 is a sequence diagram for explaining still another operation of the present invention.

[Explanation of symbols]

 Reference Signs List 1 slave unit terminal 2 base unit terminal 3, 4 dedicated line 5 transfer device 6 telephone network 7 communication terminal 11 call unit 12 call button 13 TV camera 21 control unit 22 call unit 23 alarm 24 monitor television 25 operation unit 51 telephone network I / F unit 52 control unit 53 voice guidance transmission unit 54 video guidance transmission unit 55 automatic calling unit 56 password registration unit 57 disconnection signal detection unit 58 response signal detection unit 59 DTMF detection unit 60 DT / BT detection unit 71 communication unit 72 Operation unit 73 Display unit

Claims (5)

[Claims] 1. A slave terminal having a calling means and a calling means, a master terminal having a talking means and connected to the slave terminal, and an external device connected to the master terminal and connected via a telephone network. Transfer means for automatically calling a communication terminal, wherein the transfer means automatically calls the communication terminal when a call is received from the slave terminal in a transfer mode, between the slave terminal and the communication terminal. A call path is formed, and when the call termination detecting means detects that the communication terminal has performed a call termination operation, the connection with the slave terminal is disconnected and the busy tone reaches the slave terminal. An intercom apparatus having a configuration for blocking. 2. A slave terminal having a calling means and a calling means, and a master terminal having a talking means and connected to the slave terminal and automatically calling an external communication terminal via a telephone network. When receiving a call from the slave terminal in the transfer mode, the master terminal automatically calls the communication terminal to form a communication path between the slave terminal and the communication terminal, and the communication terminal When the call end detecting means detects that the call end operation has been performed, a connection with the slave terminal is cut off to prevent a busy tone from reaching the slave terminal. Intercom equipment. 3. The communication termination device according to claim 1, wherein the communication termination detection unit detects a specific signal transmitted when the communication terminal performs a call termination operation.
The intercom device as described. 4. The disconnection signal detecting means for detecting a disconnection signal transmitted from the telephone network when the communication terminal performs a call termination operation. Or the intercom apparatus according to 2. 5. The communication end detection means is a busy sound detection means for detecting a busy sound transmitted from the telephone network when the communication terminal performs a call end operation. Item 3. The intercom device according to item 1 or 2.