JPH053579A - Domestic telephone exchanging system - Google Patents

Abstract

PURPOSE:To incorporate a door phone call equipment permitting a door phone call by using a door phone adaptor in a system and to enable the door phone call between door by a telephone set and any door phone call device. CONSTITUTION:The line wire, extension, and door phone calls can be performed by a telephone set by switchingly forming speech paths between the line wire and the extension, between the extensions, and between the extension and the call line. The telephone exchange is provided with output terminals T1 and T2 connecting the door phone call device performing the door phone call through a door phone adapter. When a call comes from the door phone, a calling signal is supplied from an output interface 21 to the door phone adapter. The output interface 21 detects the door phone call device responds to the calling signal. This output interface 21 forms the speech path between the door phone and the cordless telephone set through the door phone adapter at the time of the response of the cordless telephone set.

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 which can use a commercially available telephone to make an intercom call in addition to an outside call and an extension call.

[0002]

2. Description of the Related Art As a domestic telephone exchange system, a telephone exchange connected to an external line which is a public telephone line, and an extension line as a communication line and a control line as a signal transmission line are connected to the telephone exchange, respectively, and are available in the market. The telephone is composed of a plurality of telephone outlets that are detachably connected, and the telephone exchange is used to switch the call path between the external line and the internal line or between the internal lines, and the telephone connected to the telephone outlet is used to make an external line call and an internal line call. There are things that I was able to do. In addition, in this type of home telephone exchange system, an intercom is connected to a telephone exchange by a call line, and an intercom conversation can be performed using the telephone.

By the way, recently, cordless telephones have become widespread, and the cordless telephones may be connected as telephones of a home telephone exchange system.

[0004]

However, there are some recent cordless telephones that enable intercom communication by using an intercom adapter. FIG. 6 shows a system configuration of a home telephone exchange system using a cordless telephone capable of performing an intercom call using this type of intercom adapter as a telephone. Here, the intercom D ₁ is connected to the telephone exchange A, and the other intercom D ₂ is connected to the cordless telephone C ′ via the intercom adapter E.

When there is a call from the intercom D ₁ , the telephone exchange A sends a call signal corresponding to the intercom call to the telephone outlet B, the speaker provided in the telephone outlet B emits the intercom ring tone, and the telephone set When the handset of C is picked up, the telephone exchange A establishes a communication path between the intercom D ₁ and the telephone C to enable intercom communication.

On the other hand, when there is a call from the doorphone D _2, the call state is 'transmitted to, thereby cordless telephone C' cordless telephone C via the intercom adapter E handset c ₁ of the ', c _2' When the intercom ring tone sounds from the mobile phone and the slave units c ₁ ′ and c ₂ ′ respond, the intercom call becomes possible. However, with the above system configuration, there is a problem that the intercom D ₁ can perform intercom communication only by the telephone C and the intercom D ₂ can perform intercom communication by only the cordless telephone C ′, which is not convenient. ..

By the way, in addition to such a cordless telephone, there is an intercom communication device which can communicate with an intercom via an intercom adapter, and there is a demand to incorporate this kind of intercom communication device into the above-mentioned home telephone exchange system. .. However, even in this case, there is the same problem as in the case of the above cordless telephone. The present invention has been made in view of the above points, and an object thereof is to incorporate a doorphone communication device capable of performing a doorphone communication using a doorphone adapter into a system,
Moreover, it is an object of the present invention to provide a home telephone exchange system device capable of performing an intercom call with an intercom by either a telephone or an intercom communication device.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an output terminal for connecting an intercom communication device for intercom communication via an intercom adapter and an intercom when a call is made from the intercom. Ringing signal generating means for giving a ringing signal to the adapter, response detecting means for detecting that the intercom communication device responds to the calling signal, and connection means for connecting the intercom communication device to the intercom when the intercom communication device responds. Is installed in the telephone exchange.

[0009]

The present invention has the above-mentioned configuration,
A doorphone communication device for making a doorphone call can be connected to an output terminal provided in a telephone exchange through an intercom adapter, so that the doorphone communication device can be incorporated into a home telephone exchange system, and a telephone The exchange allows the intercom communication with the intercom communication device and the telephone to be controlled so that the intercom communication with the intercom can be performed with either the telephone or the intercom communication device.

[0010]

FIG. 1 to FIG. 5 show an embodiment of the invention. Real
The home telephone exchange system of the embodiment, as shown in FIG.
Outside line L, which is a public telephone line₁Telephone exchange A connected to
And the extension L as a communication line to the telephone exchange A.₂And trust
Control line L as a signal transmission line ₃Commercially connected phones connected by
A plurality of telephone outlets B to which machine C is detachably connected
It consists of the telephone exchange A and the outside line L₁And extension L₂Ah
Rui extension L₂Switch the communication paths between the
Outgoing call and extension call by telephone C connected to St. B
And the cordless telephone C'is also plugged into the telephone outlet B.
It is connected to the telephone exchange A through.

Each telephone outlet B is not shown,
A modular jack is provided, and a general commercially available telephone C and a cordless telephone C ′ can be detachably connected by this modular jack. Also, the telephone outlet B is a speaker for reproducing a broadcast signal, such as the extension ring tone or intercom call sound transmitted through the control line L _3, the voltage sent through the control line L ₃ A light emitting display unit is provided for discriminating a display signal which is a signal and displaying whether an internal call or an external call is being made. The speaker and the light emitting display unit perform notification and display operation.

In the case of this embodiment, the telephone exchange
Call line L to A_FourTwo doorphones D via₁, D₂Contact
It is possible to continue, and the telephone exchange L_FourAnd extension L
₂A call path is formed between the₁, D₂When
The telephone C can be used for intercom communication. Na
In the home telephone exchange system of this embodiment, the telephone
New connection terminal for connecting doorphone adapter E to exchange A
Installed on the door, door phone D ₁, D₂When there is a call from
To the cordless telephone C ′ via the doorphone adapter E.
You can make a doorphone call by telling the doorphone call to
However, a detailed description of this point will be given later.

First, a home telephone exchange to which the present invention is applied.
System operation according to the configuration and operation of telephone exchange A
explain. In the telephone exchange A of this embodiment, as shown in FIG.
Extension L to which the telephone outlet B is connected₂Each time
-Contact point r₁~ R₃This relay contact r₁~ R₃so
Extension L₂And outside line L₁Disconnect the connection with the extension L₂But
Outside line L₁Extension calls or calls
Call current supply circuit 4 for call current for phone calls ₁~
Four₃Supplied from. The relay contact r₁~ R₃Is
Normal extension L₂To the outside line L₁Switched to the side to disconnect from
The outside line L₁Switched to the side.

Now, assuming that an incoming call to the outside line is detected by the incoming call detection circuit 5, the control circuit 11 composed of the CPU performs control for switching the relay contacts r _{1 to} r ₃ to the outside line L ₁ side,
The incoming call signal from the outside line L _{1 is} sent to the telephone C.
To call the outside line by ringing a bell or the like built in the telephone C. When the handset of the telephone C is picked up in response to this call, an outside line call becomes possible. By the way, on the telephone outlet B side of the relay contacts r _{1 to} r ₃ ,
The provided DP detection circuit 2 ₁ to 2 ₃ to detect the hook state of the dial signal and phone C by a dial pulse (DP) signal inputted from the telephone C, if the phone C is off-hook when the outside line call as described above In response to the output of the hook / DP detection circuit 2 corresponding to the telephone C, it is determined that the control circuit 11 is in an external line call. At this time, the display control circuit 18 sends each telephone outlet through the control line L _3. A display signal is sent to B, and the light emitting display unit La of each telephone outlet B is turned on to display an outside line call.
An amplifier AMP is inserted in the transmission path of the display signal and a notification sound signal described later to amplify the signal.

When making an outside line from the telephone C, the receiver is lifted and dialed. In the following description, a case where the telephone line contract is a dial pulse line will be described. The off-hook state of the telephone C is detected by the hook / DP detection circuit 2, and at this time, the control circuit 11 drives the signal sound generation circuit 20 to make a pseudo transmission similar to the dial tone (two tone) sent from the telephone station. Send sound to telephone C through extension L ₂ . The sending of the pseudo dial tone is stopped when the hook / DP detection circuit 2 detects the first dial signal. By the way, in this type of home simple telephone exchange system, telephone call processing such as extension calling is performed by the telephone C.
Since a specific dial signal is input from
Even if the dial operation is performed in, the call may not be an outside call, but may be a call process such as an extension call. Therefore, the control circuit 11 receiving the dial signal makes an outside line transmission only when the number of digits of the dial signal exceeds the number of digits of the dial signal allocated for call processing (two digits in this embodiment). Start operation. This external line transmission drives the DP transmission circuit 6 and outputs the external line L via the diode bridge DB.
_{This is} done by sending a DP signal to ₁ . When the other party responds to the call from the outside line, the polarity of the outside line L ₁ is inverted, so the polarity inversion detection circuit 16 detects this polarity inversion.
After that, the relay contact r is switched so as to connect the outside line L ₁ and the inside line L ₂ to which the telephone C that has made the outside line connection is connected, thereby enabling outside line communication. Also at this time, the display control circuit 18 causes the telephone outlet B to display the outside line communication. After the polarity reversal detection circuit 16 detects the polarity reversal, both ends of the diode inserted in the external line L ₁ are short-circuited by the relay contact r ₀ , and the direct current resistance as a telephone connected to the external line L ₁ is obtained. Eliminate the increase in minutes. Further, a dial tone transmitted through the outside line L ₁ , for example, a busy tone or the like is detected by the outside line dial tone detection circuit 8, and at that time, the signal line generation circuit 20 makes an extension line L to the telephone C which has made an outside line. Send busy tone through ₂ .

When making an extension call, the telephone C inputs a dial signal in the same manner as in the case of making an outside call. It is to be noted that the control circuit 11 determines from the number of digits of the dial signal that this extension call is made, and at this time, the notification sound generating circuit 17 is driven to make a call through the control line L ₃ corresponding to the telephone C on the called side. A notification sound signal is sent to the outlet B, and an extension ringing sound is emitted from the speaker SP of the telephone outlet B. Then, the hook / DP detection circuit 2 detects that the called telephone C responds and is off-hook,
The control circuit 11 controls the crosspoint switch 10 to connect the extension L ₂ corresponding to the telephone C on the calling side and the extension L ₂ corresponding to the telephone C on the called side to enable extension telephone communication. To do. At this time, the display control circuit 18 causes the telephone outlet B to display the extension call state.

By the way, although the above-mentioned extension call is made to a specific telephone C, if the telephone C to be called is not specified, a general call can be made. In this case, the dial signal corresponding to the general call is sent to the telephone C.
Input from the telephone outlets B all simultaneously ring the extension ringing tone, and when one of the telephones C is off-hook in response to the call, the detection output of the hook / DP detection circuit 2 corresponding to the telephone C is output. In response, the control circuit 11
Is the extension L ₂ corresponding to the telephone C and the calling telephone C
The extension L ₂ corresponding to is connected to enable extension communication.

Further, this household simple telephone exchange device is provided with a holding sound sending circuit 9 for carrying out a holding operation and sending a holding melody sound. In addition, the above-mentioned outside call can be transferred by this holding operation. When the telephone line contract is the push button line, the PB receiver 1 receives the dial signal from the push button type telephone set PB signal.
It operates in the same manner as the dial pulse line except that the PB dialer 7 sends a dial signal to the outside line L ₁ in the state in which the line is closed by the DC closing circuit 3 after being detected by 2 and 13. .. Furthermore, a power supply voltage detection circuit 19 for detecting a decrease in the power supply voltage is provided so as to deal with the case where the contents stored in the buffer inside the control circuit 11 are destroyed by the decrease in the power supply voltage.

Next, the case where the intercom is called will be described. In the case of the present embodiment, two intercoms D can be connected. The intercom calling detection circuit 14 detects that the push button of the intercom D has been pressed, and the control circuit 11 receives this detection output. Causes the alarm sound generation circuit 17 to send an alarm sound signal corresponding to a call to the intercom to each telephone outlet B, and the telephone outlet B causes the intercom ring tone to ring. When the handset of one of the telephones C is picked up in response to the calling of the intercom, the control circuit 11 switches the call line L ₄ of the calling intercom D and the extension L _{2 of the} telephone C that responds to the switch S ₁ , S. Turn on one of the _two ,
And by connecting the cross point switch 10,
Enables intercom calling. Here, the intercom communication is performed via the intercom communication circuit 15.

The above description is based on the cordless telephone C '.
In the case of using the telephone C other than the above, the cordless telephone C ′ has the same main body as the telephone C in the case of the cordless telephone C ′. You can make calls and extension calls. However, another method is used for intercom calls. This point will be described below. In the present embodiment, in addition to the configuration described above, the telephone exchange A is further provided with output terminals T ₁ and T ₂ for connecting the doorphone adapter E, and an output interface 21 for performing signal processing with the doorphone adapter E, The telephone exchange A is provided with an intercom communication circuit 15 and a relay contact r _{7 for} switching connection of the communication path between the output interface 21 and the intercoms D ₁ and D ₂ .

FIG. 2 shows an example of a specific configuration of the output interface 21. In the output interface 21, the contact r ₅ of the relay Ry ₅ is provided between the output terminals T ₁ and T _{2 to} which the doorphone adapter E is connected via the signal line L ₅ and the relay contact r ₇ to provide the relay Ry _5. The connection r ₇ and the doorphone adapter E are disconnected. And
A ringing signal generating circuit 22 is provided on the side where the doorphone adapter E is disconnected from the doorphones D ₁ and D _{2 of the} relay contact r ₅ . The ringing signal generating circuit 22 is composed of a series circuit of a resistance R ₁ having a low resistance value and a contact r ₆ of a relay Ry ₆ ,
The intercom call detection circuit 14 ₁ , 14 ₂ connects the intercom D ₁ ,
When the ringing state of D ₂ is detected, the contact r ₆ is closed to bring the signal line L ₅ into a substantially short-circuited state via a low resistance, whereby the push buttons of the intercoms D ₁ and D ₂ are pressed. The same input as that of the case is given to the doorphone adapter E. That is, in this type of intercom adapter E, a voltage of several volts is usually applied to the intercom and the inputs are substantially short-circuited when the push button is pressed, so that the call from the intercom is detected. .. Then, this output interface 21, in order to detect that the cordless telephone set C 'has responded to the intercom call, is provided with a response detection circuit 23, a cordless telephone from a voltage applied to the signal line L ₅ C Detect the response status of '. In other words, the doorphone adapter E for this type of cordless telephone C'corresponds to the calling of the doorphone.
Has a function of applying a voltage of about 24 V to the call line between the intercom and the cordless telephone C ′ to supply a call current to the intercom and the cordless telephone C ′, the voltage is applied at this time. The response state of the cordless telephone C'is detected from the voltage. Specifically, when a voltage for a call is applied, the Zener diode ZD ₁ is turned on and the transistor Q ₁ is turned on to generate a response detection output. The response detection output at this time is given to the control circuit 11 of the telephone exchange A, whereby the control circuit 11 turns on _{one of} the analog switches S ₁ and S ₂ connected between the intercom D ₁ and D ₂ . That is, by turning on the analog switches S ₁ and S ₂ corresponding to the calling intercoms D ₁ and D ₂ , _one of the intercoms D ₁ and D ₂ and the cordless telephone C ′ via the intercom adapter E is connected. Form a communication path between them. The drive control of the relays Ry ₅ and Ry ₆ and the switching control of the relay contact r ₇ of the output interface 21 are performed by the control circuit 11. The drive control method will be described in the following operation description.

Hereinafter, the operation when calling the intercom of the present embodiment will be described.
explain about. When waiting for a doorphone call,
Ray contact r₇Switches to the output interface 21 side
And relay Ry_FiveContact point r_FiveIs a ringing signal
Switched to the circuit 22 side and called the doorphone adapter E
The signal generation circuit 22 is connected and
What is the aphon communication circuit 15 and the output interface 21?
Doorphone D together₁, D ₂Is separated from
There is. Then, the relay Ry of the call signal generation circuit 22₆of
Contact point r₆Is open and the call signal is sent to the doorphone adapter E.
Is not entered. This state is outside
The same is true during line calls and extension calls.

When a call from any one of the intercoms D ₁ is detected by the intercom ringing detection circuits 14 ₁ and 14 ₂ , the telephone exchange A performs the above-described operation at the time of calling the door to the telephone C and the telephone outlet B. To call. Also,
At the same time, the control circuit 11 outputs the output interface 2
Send the control output that closes the contact r ₆ of the relay Ry _{6 to} 1,
The intercom adapter E is caused to send a calling signal. Therefore,
Similar to the telephone C, the intercom calling is simultaneously performed on the cordless telephone C ′ side.

When the telephone C responds to this call, the relay contact r ₇ is disconnected from the output interface 21, and the intercoms D ₁ and D ₂ are connected to the intercom communication circuit 15.
, The call side analog switch S ₁ or S ₂ is turned on and the crosspoint switch 10 is switched to connect the telephone C to the intercom D ₁ or D _2. To form a door phone call.

On the contrary, when the cordless telephone C'responds to the intercom call, the response detection circuit 23 informs the control circuit 11 that the cordless telephone C'has responded. At this time, the control circuit 11 contacts the contact r of the relay Ry ₅ .
Control ₅ to switch to the intercom D ₁ , D ₂ side,
At the same time, the analog switches S ₁ and S ₂ on the calling side are turned on. At this time, since the relay contact r ₇ is kept switched to the output interface 21 side, the cordless telephone C ′ is connected via the doorphone adapter E.
The doorphone D _1, speech path between the D ₂ are formed, thereby enabling intercom call.

With this arrangement, not only the telephone C but also the cordless telephone C'can make an intercom conversation with both the intercoms D ₁ and D ₂ . A transition diagram and a flow chart summarizing the intercom call operation are shown in FIGS. 4 and 5. By the way, in the above description, the case where the device for making a call with the intercom is a cordless telephone has been described, but an intercom device for making a call with another intercom is used by being connected to the output terminals T ₁ , T _2. You can also Since the operation of the intercom communication circuit such as the output interface 21 at this time is performed in the same manner as described above, the description thereof will be omitted.

The cordless telephone C'in the above case
The call between the doorphones D ₁ and D ₂ is made via the doorphone adapter E, but the doorphone call path may be made via the doorphone call circuit 15 like other telephones C. It is also possible to detect the response to the intercom calling of the cordless telephone C ′, similarly to the telephone C. Therefore, when the cordless telephone C'is used as the intercom communication device, the output interface 21 may be configured to only give the intercom adapter E a call signal corresponding to the intercom call.

[0028]

As described above, the present invention provides an output terminal for connecting an intercom communication device for performing intercom communication via the intercom adapter and a call signal to the intercom adapter when there is a call from the intercom. Since the telephone exchange is provided with a call signal generating means, a response detecting means for detecting that the intercom communication device responds to the call signal, and a connecting means for connecting the intercom communication device to the intercom when the intercom communication device responds. It is possible to connect an intercom communication device for performing intercom communication via a doorphone adapter to an output terminal provided in the telephone exchange, and to incorporate the intercom communication device into a home telephone exchange system. Moreover, since the intercom call control with the intercom communication device and the telephone can be performed by the telephone exchange, the intercom communication with the intercom can be performed with either the telephone or the intercom communication device.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a telephone exchange according to an embodiment of the present invention.

FIG. 2 is a specific circuit diagram of the output interface of the above.

FIG. 3 is a system configuration diagram of a home telephone exchange system according to the present embodiment.

FIG. 4 is a state transition diagram showing a doorphone call operation.

FIG. 5 is a flowchart summarizing a doorphone call operation in a simple manner.

FIG. 6 is a system configuration diagram of a conventional home telephone exchange system.

[Explanation of symbols]

A Telephone exchange C Telephone C'Cordless telephone D Doorphone E Doorphone adapter L ₁ External line L ₂ Internal line L ₄ Call line L ₅ Signal line r _{5 to} r ₇ Relay contact 21 Output interface 22 Ring signal generation circuit 23 Response detection circuit

Claims (1)

Claims: 1. A telephone exchange to which an external line, which is a public telephone line, is connected, a plurality of commercially available telephones connected to the telephone exchange by extension lines, and a communication line to the telephone exchange. An intercom connected via the telephone switchboard is used to switch between the external line and the internal line, the internal lines, or the internal line and the communication line between the internal lines and the telephone line to make an external line call, an internal line call and a doorphone call. In the home telephone exchange system,
An output terminal for connecting a doorphone communication device for making a doorphone call via a doorphone adapter, a ringing signal generating means for giving a ringing signal to the doorphone adapter when there is a call from the doorphone, and a doorphone communication device for the ringing signal. A telephone exchange system for home use, characterized in that the telephone exchange is provided with a response detecting means for detecting that a response has been made by the user and a connecting means for connecting the intercom communication device to the intercom when the intercom communication device responds.