JP2000004464A - Home use telephone exchange system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow the user to surely identify an external line call and an intercom call before the user makes a speech. SOLUTION: The telephone exchange system A is provided with a call signal transmission means 12 that sends a call signal to a telephone set T, an identification signal transmission means 13 that sends a caller identification signal to the telephone set T, an off-hook detection means 3 that detects off-hook of the telephone set T, and a control means 1. Thus, when the system A discriminates a call from an intercom slave set D, the system A sends a call signal to all telephone sets T and when the system detects off-hook of a telephone set T, the system sends a signal denoting a call from the intercom slave set D to the telephone set T for a prescribed time and makes an intercom speech available.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a home telephone exchange system provided with a telephone exchange device capable of making external calls, intercom calls, and internal calls.

[0002]

2. Description of the Related Art FIG. 5 is a diagram showing the configuration of a home telephone exchange system (home telephone system). In this system, a telephone exchange 100 connected to a telephone line L
A plurality of modular outlets M (# 1 to # 3) are connected via a 4-wire signal line consisting of a communication line and a control line, and a telephone T (# 1 to # 3) is connected to each of them.
One or more intercom units D
(#A, #B) are connected via a communication line.

Each of the modular outlets M is provided with a speaker for outputting a ringing tone, an outside line indicator for indicating that an extension call or an outside call is being made, and an insertion hole for inserting a modular jack on the telephone set T side. A normal telephone T to which the telephone line L is connected can be used for connection to the modular outlet M. With such a configuration, the telephone exchange apparatus 100 switches and connects each communication line to enable external telephone calls using the telephones T, internal telephone calls between the telephones T, and intercom telephone calls between the intercom slave unit D and the telephone T. .

When the telephone exchange apparatus 100 detects a dial number for calling an outside line, which is transmitted from the telephone set T, it connects the telephone line L so that a call can be made from the telephone set T. When there is a call from another telephone, the telephone line L is connected to all the telephones T, the transmitted call signal is transmitted to the telephone T as it is, and a ring tone such as "lean" is output. Let it. On the other hand, if one of the telephones T answers, a telephone call (external telephone call) can be made with the telephone T.

When a call from a telephone T is detected, a call signal is transmitted to the telephone T specified by the dial number, and a speaker of the modular outlet M
A ringing tone such as "pupu-pu" is output. On the other hand, if the telephone set T connected to the modular outlet M answers, a telephone call (extension call) between the telephone sets T can be performed.

When a call is received from the intercom slave unit D, a calling signal is transmitted to all the telephone sets T, and a ringing sound such as "ping-pong" is output from the speaker of the modular outlet M. On the other hand, if any one of the telephones T connected to the modular outlet M answers, a telephone call (doorphone call) can be made with the telephone T. In the above, the system in which the telephone T is connected through the modular outlet M with a speaker has been described. However, each of the plurality of telephones T is connected to the telephone exchange 100 via a two-wire signal line. The system operates as follows.

[0007] When a call is received from another telephone via the telephone line L, the telephone exchange apparatus 100 connects the telephone line L to all telephones T in the same manner as in the above-described system, and transmits the outgoing call. The signal is directly transmitted to the telephone set T to output a ringing tone such as "lean". If any one of the telephones T answers, an external call can be made with the telephone T.

On the other hand, when there is a call from the telephone T,
When there is a call from the intercom slave unit D, the telephone exchange 100 transmits a call signal different from the call signal transmitted through the telephone line L to the telephone set T so that the caller can be identified. I have to. FIG. 6 shows another example of the call signal.

FIG. 6A shows a case of an outside line call, in which a 16-Hz call signal transmitted through the telephone line L is output as it is. (B) is a case of an extension call,
The telephone exchange device 100 outputs a call signal such as “Rin, Rin” to the telephone set T so that it can be identified as an outside line call. (C) is a case of a door phone call, and the telephone exchange device 100 can be distinguished from an outside line call and an inside line call.
From the telephone T
Output to If the telephone T responds to these calls and the telephone T answers, the telephone T can start talking.

Here, the extension call and the intercom call can be distinguished from each other by the number of times of output of the signal in one cycle. However, the present invention is not limited to this. Are changed so that three calls can be identified.

[0011]

However, the conventional home telephone exchange system has the following problems. In the system described with reference to FIG. 5, in which a telephone is connected via a modular outlet, a dedicated modular outlet has to be provided, so that the construction is troublesome and costly. Also, if a cordless telephone is used as the telephone and the remote unit is located away from the base unit and the modular outlet, the ringer output from the speaker of the modular outlet will not be heard, and it will respond to extension calls and door phone calls. In some cases, it was not possible.

On the other hand, even in a system in which a telephone is directly connected to a telephone exchange, the calling source can be identified only by a ringing tone.
It was difficult to hear it. The present invention has been proposed in view of such circumstances, and it is an object of the present invention to provide a home telephone exchange system that allows external calls, internal calls, and intercom calls to be reliably identified before a call. I do.

[0013]

Therefore, in the present invention,
A telephone exchange device is connected to the telephone line and the intercom slave unit, and one or more telephones are connected to the telephone exchange device. The telephone exchange device makes a call from the telephone line, a call from the intercom slave unit, and a call from the telephone. It proposes an improvement of a home telephone exchange system in which a call is discriminated and a telephone line is connected to a telephone, an intercom handset and a telephone, and a telephone is switched to a telephone.

In the present invention, the telephone line refers to a public line, and it does not matter whether the line is an analog line or a digital line. In claim 1, the telephone exchange device includes a calling signal transmitting means for transmitting a calling signal to the telephone,
An identification signal transmitting means for transmitting a caller identification signal to the telephone, an off-hook detecting means for detecting an off-hook of the telephone, and a control means.

The control means, when judging a call from the telephone line, causes all the telephones to output a call signal transmitted through the telephone line, and when the off-hook detecting means detects an off-hook of one of the telephones, On the other hand, when it is determined that a call from the intercom slave unit has been made, a calling signal is transmitted from the calling signal transmitting means to all telephones, and during the transmission of the calling signal, the off-hook detecting means is used. When the off-hook of any of the telephones is detected, a signal indicating a call from the intercom slave unit is transmitted from the identification signal transmitting means to the telephone for a predetermined time, and then the intercom can be performed by the telephone.

If the telephone responds to the call without outputting a sound for identifying the caller, it is recognized that the call is from an outside line. It turns out that it is a call from the child device. In claim 2, in claim 1, the telephone exchange device is limited to a case where a plurality of telephones are connected, and the control means, when judging a call from any of the telephones, a call signal transmitting means. Sends a calling signal to the called telephone. During the sending of the calling signal, if the off-hook detecting means detects the off-hook of the called telephone, the identification signal sending means sends the calling signal to the called telephone and the other telephone sets After transmitting a signal indicating a call for a predetermined time, an extension call between telephones is enabled.

If the telephone responds to the call and does not output a sound for identifying the caller, it recognizes that the call is from an outside line. The sound indicates whether the call is from a door phone slave or an extension from a telephone. According to a third aspect of the present invention, in the first or second aspect, the identification signal of the caller transmitted to the telephone by the identification signal transmitting means is constituted by a voice message.

According to a fourth aspect, in any one of the first to third aspects, the identification signal selecting means for selecting the calling source identification signal to be transmitted to the telephone by the identification signal transmitting means from a plurality of identification signals. , Furthermore.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an example of an internal configuration of a telephone exchange A which is a main part of a home telephone exchange system of the present invention. This telephone exchange A is installed in a dwelling unit for home use and has a telephone line L (L1-L2).
Connected to a telephone exchange (not shown) via
Doorphone child device D (DA1-DA) installed at the entrance
2) Connect. In addition, the telephone T installed in the dwelling unit
(T1-T2) are connected. Here, the telephone T
Are connected only one.

The telephone exchange A discriminates a call from another telephone or the like via the telephone line L, a call from the intercom slave unit D, and a call from the telephone T to an outside line. T, the basic operation of switching connection to any of the doorphone slave unit D and the telephone set T is performed. In the figure, reference numeral 1 denotes a control circuit which constitutes a control means such as a CPU, etc., 2 denotes a line switching unit which performs line switching connection by relay driving or the like, and 3 denotes an off-hook detection circuit which constitutes off-hook detection means of the telephone set T.

4 is a diode bridge, 5 is an outside line call detection circuit for detecting a call signal from the telephone exchange, 7 is a current supply circuit for supplying a constant current to the communication path during a door phone call, and 8 is a door phone handset D. A doorphone call detection circuit for detecting a call from the telephone by a voltage drop or the like, 9 a doorphone interface circuit for controlling a doorphone call between the doorphone slave device D and the telephone set T, and 10 a back tone for returning a ringing sound to the doorphone slave device D side. A control circuit, 11 is a voice amplifier circuit for amplifying the sound output from the speaker SP, 12 is a ring signal output circuit for generating a ring tone output from the speaker SP and a ring tone output from the telephone T, and 13 is a speaker SP or telephone. This is an identification signal output circuit that generates an identification sound of a caller output from T.

Here, the call signal output circuit 12 constitutes a call signal sending means for sending a call signal to the telephone T, and the identification signal output circuit 13 sends an identification signal for sending a caller identification signal to the telephone T. Configure means. A line switching unit 2 and an off-hook detection circuit 3 are inserted between connection terminals L1 and L2 for connecting the telephone line L and connection terminals T1 and T2 for connecting the telephone T.
Detects the current due to DC closing when the telephone set T goes off-hook with a photocoupler. The connection terminal L
An external line call detection circuit 5 is connected to 1 and L2 via a diode bridge 4 to detect a call signal transmitted through the telephone line L.

The connection terminals DA1 and DA2 for connecting the intercom slave unit D are connected to an intercom call detection circuit 8 and an intercom interface circuit 9, respectively. The door phone call detection circuit 8 detects the call when the call button of the door phone slave unit D is operated. The doorphone interface circuit 9 includes a current supply circuit 7, a line switching unit 2, an off-hook detection circuit 3, connection terminals T1, T
A communication path is formed between the intercom slave unit D and the telephone set T via the communication line 2.

The control circuit 1 controls the line switching unit 2 to form a communication path between the telephone line L and the telephone set T, or a communication path between the door phone slave unit D and the telephone set T. Further, the signal output control by the voice amplification circuit 11, the call signal output circuit 12, and the identification signal output circuit 13, the control of the back tone control circuit 10 for returning the ringing sound to the doorphone handset D side,
Control of current supply circuit 7 for supplying a constant current to the communication path during door phone communication, door phone interface circuit 9
Control.

The control circuit 1 receives a call from the telephone line L,
When detected by the outside line call detection circuit 5, the contact of the line switching unit 2 which is on the b side during standby is switched to the a side,
The telephone T outputs a call signal transmitted through the telephone line L. On the other hand, if the telephone T responds by picking up the handset or the like, this is detected by the off-hook detection circuit 3 and the line switching unit 2 is controlled so that the telephone T is connected to the telephone line L (contact is a
Side), and the outside telephone call by the answering telephone T is enabled.

When the call from the door phone slave unit D is detected by the door phone call detection circuit 8, the control circuit 1 sends a call signal generated by the call signal output circuit 12 to the telephone set T. At the same time, the call signal is sent to the voice amplifier circuit 1
1 and output from the speaker SP. When the off-hook detecting circuit 3 detects the off-hook of the telephone set T during the sending of the calling signal, the control circuit 1 stops the calling signal output from the calling signal output circuit 12 and simultaneously outputs the signal from the current supply circuit 7. After the start of the supply of the call current, a signal indicating a call from the intercom slave set D is transmitted from the identification signal output circuit 13 to the off-hook telephone set T for a predetermined time, and then the intercom call can be performed by the telephone set T. To

In this way, if the called telephone T responds to the call and does not output a sound for identifying the caller, it is determined that the call is from an outside line, and the caller is notified of the call. If the identification sound is output, it is determined that the call is from the intercom slave unit D. Therefore, unlike the conventional system, it is not necessary to connect the telephone T via a modular outlet with a speaker, and a general telephone can be directly connected to the telephone exchange A for use. In addition, since the calling source can be determined not by the ringing tone but by the identification tone immediately after picking up the handset, it is possible to reliably identify whether the call is an outside line call or a door phone call.

The telephone exchange A shown in FIG.
As an identification signal selecting means, an identification sound selection switch 14 is provided which can select a calling source identification signal (including a voice message) output from the identification signal output circuit 13 to the telephone set T from among a plurality of identification signals. Therefore, the identification sound of the intercom call can be set according to the preference.

The switch 14 is preferably constituted by a dip switch or a switch provided on the back surface of the apparatus A so that the setting of the identification sound is not easily changed by mischief or the like. Further, the identification signal selection means such as the identification sound selection switch 14 does not necessarily need to be provided, and only a preset identification sound may be output.

Next, another example of the internal configuration of the telephone exchange A, which is a main part of the home telephone exchange system of the present invention, is shown in FIG.
Shown in Here, unlike the configuration of FIG. 1, the telephone exchange A is connected to the telephone line L (L1-L2), connects the intercom slave units D (DA1-DA2), and includes a plurality (n) of telephones. Telephone T (T11-T21, T1n-T2
n) is connected to enable extension calls.

The telephone exchange A distinguishes between a call from another telephone or the like through the telephone line L, a call from the intercom slave unit D, and a call from the telephone T, and determines the telephone line L and the telephone T, The basic operation of switching connection between the doorphone slave unit D and the telephone T, and any one of the telephones T and the other telephones T is performed. The telephone exchange apparatus A has substantially the same configuration as that shown in FIG. 1; a control circuit 1 comprising control means such as a CPU, a line switching unit 2 for switching and connecting lines by relay driving, etc .; Is provided. Here, off-hook detection circuits 31 to 3n are provided in each of the plurality of telephones T to constitute off-hook detection means.

Also, a diode bridge 4, an outside line call detection circuit 5 for detecting a call signal from the telephone exchange, a control for connecting two telephones T during an internal call, and a telephone T and an intercom slave during a door phone call. And an extension switching circuit 6 for controlling connection with the extension switching circuit D.
Includes a circuit for detecting a dial number signal transmitted to designate another telephone T when an extension is called.

Further, a current supply circuit 7 for supplying a constant current to the communication path during a door phone call or an extension call, a door phone call detection circuit 8 for detecting a call from the door phone slave unit D by a voltage drop, etc. Intercom interface circuit 9 for controlling intercom communication between the device D and the telephone T,
A back tone control circuit 10 for returning a ringing sound to the doorphone slave device D side, a sound amplifying circuit 11 for amplifying a sound output from the speaker SP, a ringing sound for outputting from the speaker SP,
A ringing signal output circuit 12 for generating a ringing tone to be output from the telephone set T, output from the speaker SP or the telephone set T,
An identification signal output circuit 13 for generating a caller identification sound is provided.

Here, the call signal output circuit 12 constitutes a call signal sending means for sending a call signal to the telephone T, and the identification signal output circuit 13 sends an identification signal for sending a caller identification signal to the telephone T. Configure means. Between the connection terminals L1 and L2 for connecting the telephone line L and the connection terminals T11, T21,..., T1n and T2n for connecting a plurality of telephones T, the line switching unit 2 and the off-hook detection circuit 3 (31 to 31).
3n), and the off-hook detection circuit 3 detects the current due to the DC closing when the telephone T goes off-hook,
Detected by photocoupler. Also, connection terminals L1, L2
Is connected to an outside line call detection circuit 5 via a diode bridge 4, and detects a call signal transmitted through the telephone line L.

The connection terminals DA1 and DA2 for connecting the doorphone slave device D are connected to the doorphone call detection circuit 8 and the doorphone interface circuit 9, respectively. The door phone call detection circuit 8 detects the call when the call button of the door phone slave unit D is operated. The doorphone interface circuit 9 includes a current supply circuit 7, an extension switching circuit 6, a line switching unit 2, an off-hook detection circuit 3,
A communication path is formed between the intercom slave unit D and the telephone set T via the connection terminals T1, T2,.

The control circuit 1 controls the line switching unit 2 to form a communication path between the telephone line L and the telephone T, or to form a communication path between the intercom slave D and the telephone T or between the telephones T. I do. Further, the signal output control by the voice amplifier circuit 11, the call signal output circuit 12, and the identification signal output circuit 13, the control of the back tone control circuit 10 for returning the ringing sound to the doorphone slave device D side, the constant current in the call path during the doorphone call , An exchange control of the telephone set T by the extension exchange circuit 6, and a control of the intercom interface circuit 9.

The control circuit 1 receives a call from the telephone line L,
When detected by the outside line call detection circuit 5, the contact of the line switching unit 2 which is on the b side during standby is switched to the a side,
In all the telephone sets T, a call signal transmitted through the telephone line L is output. On the other hand, if one of the telephones T responds by picking up the handset or the like, this is detected by the off-hook detection circuit 3 and the line switching unit 2 is controlled to connect only the telephone T to the telephone line L ( The contact connecting other than the answering telephone T is returned to the b side), and the outside telephone call by the answering telephone T is enabled.

Further, when the control circuit 1 detects a call from the intercom slave unit D by the intercom call detection circuit 8, the control circuit 1 sends a call signal generated by the call signal output circuit 12 to all telephone sets T. At this time, the call signal may be simultaneously amplified by the voice amplifier circuit 11 and output from the speaker SP. When any of the off-hook detection circuits 3 detects the off-hook of the telephone set T during the transmission of the calling signal, the control circuit 1 stops the calling signal output from the calling signal output circuit 12, The extension line switching circuit 6 is controlled so that only the telephone T is connected to the doorphone slave device D, and further, the supply of the call current from the current supply circuit 7 is started, and the identification signal output circuit 13 sends the call to the off-hook telephone T. After transmitting a signal indicating a call from the intercom slave unit D for a predetermined time, the intercom can be performed by the telephone set T.

When the extension switching circuit 6 detects an extension call from any one of the telephones T by the dial number transmitted, the control circuit 1 determines the telephone T at the destination designated by the number. After controlling the extension switching circuit 6 so as to make a connection, a call signal generated by the call signal output circuit 12 is sent to the telephone set T to be called. The control circuit 1 transmits the calling signal while transmitting the calling signal.
When the off-hook detection circuit 3 detects an off-hook, the call signal output from the call signal output circuit 12 is stopped, and at the same time, the supply of the call current from the current supply circuit 7 is started. After transmitting a signal indicating a call from another telephone set T to the off-hook telephone set T for a predetermined time, the extension telephone call between both telephone sets T is enabled.

As described above, the called telephone T
On the side, when answering the call, if the sound for identifying the caller is not output, it is understood that the call is from an outside line, and if the sound for identifying the caller is output, the sound indicates It is determined whether the call is from the extension or from the intercom slave D. So, like the traditional system,
There is no need to connect the telephone T via a modular outlet with a speaker, and a general telephone can be directly connected to the telephone exchange A for use. Further, since the calling source can be determined not by the ringing tone but by the identification tone immediately after picking up the handset, it is possible to reliably identify whether the call is an external line call, an internal line call, or a door phone call.

The telephone exchange A shown in FIG.
As an identification signal selecting means, an identification sound selection switch 14 is provided which can select a calling source identification signal (including a voice message) output from the identification signal output circuit 13 to the telephone set T from among a plurality of identification signals. As a result, the identification sound for intercom calls and extension calls can be set as desired.

The switch 14 is preferably constituted by a dip switch or a switch provided on the back surface of the apparatus A so that the setting of the identification sound is not easily changed by mischief or the like. Further, the identification signal selection means such as the identification sound selection switch 14 does not necessarily need to be provided, and only a preset identification sound may be output.

FIG. 3 is a time chart showing the operation of the telephone exchange system according to the present invention. FIG. 3A shows a case of an extension call, and FIG. 3B shows a case of a door phone call. In the case of an outside line call, the telephone line L
As in the case of a general telephone to which the telephone line is connected, a response is made to the call signal transmitted through the telephone line L and the telephone conversation is started, so that the description is omitted here (see FIG. 6A).

(A) shows a case where the telephone "TEL2" is called from the telephone "TEL1".
In order to call an extension, the telephone is switched off-hook and the extension number "2" is dialed.
A call signal is sent to L2. In TEL2, if a response is made to a ringing tone such as "ringling" by off-hook, an extension ringing tone such as "pu-pu-poo" is heard, indicating that the call is an extension, so the call is from another telephone T at home. After recognizing that, the call can be started.

At this time, at the calling source TEL1, while the telephone exchange apparatus A sends the calling signal to TEL2, the back tone is output at the same time, and TEL2
This back tone is continuously output while the extension ring tone is being output in the above. As described above, even when the extension ringing tone is output, the caller's telephone T does not go into a silent state, so it is known that the other party is being called, and the calling is not accidentally terminated.

If the extension ring tone is output for an excessively long time, the calling party may determine that the other party is absent and terminate the call. In the case of picking up and answering, it is particularly preferable to set the time to about 2 to 3 seconds since there is a possibility that the call must be started without identifying the caller.

When three or more telephone sets T are installed in the system, the identification signal (identification sound) of the caller may be changed for each telephone set T.
In (b), the telephone “T
EL1 ”is called, and in the door phone,
When a call button is pressed to call a door phone, a back tone such as “ping-pong” is output. On the other hand, in TEL1, a ringing sound such as "ring ring ring" is output by a call from the door phone, and if the call is answered off-hook, a door phone ringing sound such as "ping-pong" indicating that the door phone is ringing is output. hear. As a result, the person who answers on the telephone T can start talking after recognizing that there is a visitor.

The time for outputting the doorphone ringing tone is as follows.
As in the case of the extension ringing sound in (a), if the time is too long, there is a risk that the doorphone handset D may determine that the user is out of the office. Since there is a possibility that the source cannot be identified, it is preferable to set it to about 2 to 3 seconds. 3 (a) and 3 (b), the call signal (ring tone) output from the telephone exchange A to the call destination is different between the extension call and the intercom call, but the present invention is not limited to this. However, the two calls may be the same since they can be identified by the identification sound immediately after the answer. Further, these call signals may be the same as the call signals transmitted through the telephone line L.

If a plurality of intercom units D are installed in the system, the identification signal (identification sound) of the caller may be changed for each intercom unit D. Next, FIG. 4 is a time chart showing another operation of the telephone exchange system of the present invention. FIG. 4A shows a case of an extension call, and FIG. 4B shows a case of a door phone call.

Here, unlike FIG. 3, a voice message for identifying the caller is output from the identification signal output circuit 13 instead of the extension ring tone and the door phone ring tone. (A) When calling the telephone "TEL2" from the telephone "TEL1", the telephone exchange apparatus A sends a call signal to the telephone TEL2 from the telephone exchange A by dialing the extension "2" in the off-hook state in order to call an extension. Sent out. In TEL2, responding off-hook to the ring tone indicates an extension call.
For example, since a voice message such as "extension" is heard, it is possible to start a call after recognizing that the call is from another telephone T in the home. In the system,
When three or more telephones T are installed, the voice message may be changed for each telephone T.

In the case of calling the telephone "TEL1" from the doorphone slave unit "doorphone" in (b), if the call button is pressed in the doorphone to call the doorphone, a back tone is output. On the other hand, in TEL1, a ring tone is output by a call from the intercom, and when the call is answered off-hook, a voice message indicating that the intercom is a call, for example, "I am an intercom" is heard. As a result, the person who answers on the telephone T can start talking after recognizing that there is a visitor. If a plurality of intercom units D are installed in the system, the voice message may be changed for each intercom unit D.

[0052]

As can be understood from the above description, in the home telephone exchange system according to the first aspect of the present invention,
When the telephone exchange determines a call from the intercom slave unit, if it detects the off-hook of the telephone, it transmits an identification signal for identifying the caller for a predetermined time,
Make calls available.

Thus, in the called telephone,
If a sound for identifying the caller is not output when the call is answered, it is determined that the call is an outside line call. If a sound for identifying the caller is output, it is determined that the call is a door phone call. Also, since the calling source can be identified not by the ringing tone but by the identification tone immediately after the answer,
It is possible to surely determine whether the call is an outside line call or a door phone call, and a corresponding action can be taken.

According to the second aspect, when the telephone exchange determines a call from the intercom slave unit, or when it determines a call from the telephone, if the off-hook of the telephone to be called is detected, the telephone exchange can perform the predetermined time. During this period, after transmitting an identification signal for identifying the caller, a call can be started. Thus, when the called telephone answers the call, if no sound for identifying the caller is output, it is recognized that the call is an outside line, and if a sound for identifying the caller is output, By the sound, extension call,
It is clear which of the intercom calls. Also, since the calling source can be identified not by the ringing tone but by the identification tone immediately after answering, the outside line call,
It is possible to determine whether the call is an extension call or a door phone call, and a corresponding action can be taken.

According to the third aspect, since the identification sound of the caller is constituted by a voice message, the identification of the caller is facilitated. According to the fourth aspect, since the identification signal of the call source transmitted from the telephone exchange to the telephone can be selected, the identification sound of the intercom call and the extension call can be matched to the taste of each home.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of a main configuration of a home telephone exchange system according to the present invention.

FIG. 2 is a block diagram showing another example of the configuration of the main part of the home telephone exchange system of the present invention.

FIG. 3 is a time chart showing the operation of the home telephone exchange system of the present invention.

FIG. 4 is a time chart showing another operation of the home telephone exchange system of the present invention.

FIG. 5 is a schematic configuration diagram of a conventional home telephone exchange system.

FIG. 6 is a diagram showing a call signal of a conventional home telephone exchange system.

[Explanation of symbols]

 A telephone exchange device 1 control circuit 2 line switching unit 3 off-hook detection circuit 5 external line call detection circuit 6 extension line exchange circuit 8 door phone call detection circuit 12 call signal output circuit 13 identification signal output circuit 14 identification sound selection switch L telephone line D door phone child Device T telephone

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[Procedure amendment]

[Submission date] August 28, 1998 (1998.8.2
8)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0023

[Correction method] Change

[Correction contents]

Connection terminal DA for connecting doorphone slave unit D
The doorphone call detection circuit 8 and the doorphone interface circuit 9 are connected to 1 and DA2.
The door phone call detection circuit 8 detects the call when the call button of the door phone slave unit D is operated. The intercom interface circuit 9 forms a communication path between the intercom slave set D and the telephone set T via the current supply circuit 7, the line switching section 2, the off-hook detection circuit 3, and the connection terminals T1 and T2.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0035

[Correction method] Change

[Correction contents]

Connection terminal DA for connecting doorphone slave unit D
The doorphone call detection circuit 8 and the doorphone interface circuit 9 are connected to 1 and DA2.
The door phone call detection circuit 8 detects the call when the call button of the door phone slave unit D is operated. The doorphone interface circuit 9 is connected to the doorphone slave device D and the telephone T via a current supply circuit 7, an extension switching circuit 6, a line switching unit 2, an off-hook detection circuit 3, and connection terminals T1, T2,.
And form a communication path between them.

Claims (4)

[Claims] 1. A telephone exchange device for connecting a telephone line and a door phone handset and having one or more telephones connected thereto, wherein the telephone exchange device performs a call from the telephone line,
In a home telephone exchange system configured to discriminate between a call from the intercom slave unit and a call from the telephone, and switch and connect the telephone line to the telephone, the intercom slave and the telephone, or the telephone to the telephone, The telephone exchange apparatus includes: a calling signal transmitting unit that transmits a calling signal to the telephone; an identification signal transmitting unit that transmits a calling source identification signal to the telephone; an off-hook detecting unit that detects an off-hook of the telephone; When a call from the telephone line is determined, all the telephones output a call signal transmitted through the telephone line, and when the off-hook detecting means detects off-hook of one of the telephones, an outside-line call by that telephone is made. On the other hand, when it is determined that a call from the intercom slave unit has been made, all calls from the calling signal transmitting means are made. When the off-hook detecting means detects an off-hook of any one of the telephones while the calling signal is being transmitted, the identification signal transmitting means sends a signal to the telephone to indicate a call from the intercom slave unit. And a control means for enabling the telephone to make a door phone call after transmitting for a predetermined time. 2. The telephone exchange device has a plurality of telephones connected thereto, and the control means, when judging a call from any of the telephones, from the call signal transmitting means to the telephone at the call destination. When the off-hook detecting means detects an off-hook of the called telephone during the sending of the calling signal, a signal indicating a call from another telephone is sent from the identification signal sending means to the called telephone. After sending for a predetermined period of time, enabling extension calls between telephones,
The home telephone exchange system according to claim 1. 3. The home telephone exchange system according to claim 1, wherein the identification signal of the caller transmitted by the identification signal transmitting means to the telephone is constituted by a voice message. 4. An apparatus according to claim 1, further comprising identification signal selection means for selecting, from among a plurality of identification signals, a caller identification signal to be transmitted to said telephone by said identification signal transmission means. A home telephone exchange system according to item 1.