JPH05207540A - Telephone exchange system - Google Patents

Abstract

PURPOSE:To attain reply without use of a telephone set. CONSTITUTION:A telephone exchange A selects and forms a channel between an external line and an extension L2 or between extensions L2 and a telephone set C is used to make external line talking and extension talking. A telephone receptacle B is provided with a voice talking device comprising a speaker SP, a microphone MC and a hybrid circuit 30. In the case of simultaneous talking, a cross point switch, is used to form a channel between the caller extension L2 and the called control line L3. A speech circuit 29 is provided to the channel to attain 2-way talking between the extension L2 and the control line L3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone exchange system capable of making external and internal calls with a plurality of commercially available telephones.

[0002]

2. Description of the Related Art Recently, a telephone exchange connected to a central office by an external line which is a public telephone line, and a plurality of telephones connected to the telephone exchange by extension lines as communication lines and control lines as signal transmission lines, respectively. It consists of an outlet and a commercially available telephone that is detachably connected to these telephone outlets. 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 can make an external line call and an external line call. There is provided a telephone exchange system that enables extension calls.

To each telephone outlet of the above telephone exchange system, a speaker for reproducing a notification signal such as an extension ringing tone or an intercom ringing tone sent via a control line, and a speaker sent via this control line. A light emitting display unit is provided for discriminating a display signal which is an incoming voltage signal and displaying an indication such as during an internal call or an external call.

[0004]

By the way, in a telephone exchange system of this type, when an extension call is made, it is possible to make a so-called paging call which calls all the other extensions from one extension at a time. is there. In addition, some of the devices that can perform such a simultaneous call are further provided with a function capable of performing voice communication from the speaker of each telephone outlet by using a telephone after the simultaneous call.

However, in the telephone exchange system having such a voice contact function, in order to respond to the voice contact, the handset of the telephone must be used. Therefore, if there is a person to be contacted in a room that does not have a telephone set (however, a telephone outlet is preliminarily installed), even if you want to respond to the voice contact,
There was a problem that there was no such thing.

The present invention has been made in view of the above points, and an object of the present invention is to provide a telephone exchange system capable of making a response without using a telephone.

[0007]

In order to achieve the above object, the present invention is provided with a voice call device for making a voice call at a telephone outlet, and any extension and a control line other than the control line corresponding to this extension are provided. A speech path forming means for forming a speech path with the control line, and a speech circuit which is inserted into the speech path formed by the speech path forming means and enables bidirectional speech between the extension line and the control line. Is installed in the telephone exchange.

In such a telephone exchange system,
For example, in the case where all extensions are simultaneously called from any extension, the call path forming means may form a call path between the extension on the calling side and the control line on the called side. ..

[0009]

The present invention has the above-mentioned configuration,
Two-way communication is possible between any telephone and a telephone outlet other than the telephone outlet to which the telephone is connected. For example, it is possible to respond to voice contact at the time of simultaneous ringing without using the telephone. It was made possible.

[0010]

1 to 4 show an embodiment of the present invention. The telephone exchange system of this embodiment is a simple type used for home use, and this telephone exchange system is, as shown in FIG. 4, an outside line which is a public telephone line via a sever G and a protector H. A telephone exchange A connected to the central office E at L ₁ , a plurality of telephone outlets B connected to the telephone exchange A by an extension L ₂ as a communication line and a control line L ₃ as a signal transmission line, respectively. It is composed of a commercially available telephone C which is detachably connected to the telephone outlet B, and the telephone exchange A is used to switch the call path between the external line L ₁ and the internal line L ₂ or the internal line L ₂ to be connected to the telephone outlet B. It is possible to make an outside line call and an extension line call on the telephone C. In the case of the present embodiment, a maximum of 6 telephones C can be connected.

As shown in FIG. 3, each telephone outlet B is provided with a modular jack M, and a general commercially available telephone C is detachably connected to the modular jack M. Further, the telephone outlet B has a speaker SP for reproducing a notification signal such as an extension ringing tone or a doorphone ringing tone sent via the control line L _3, and the control line L _3.
Equipped with light emitting display units La and Lb for discriminating the display signal which is a voltage signal sent via ₃ and displaying during an internal call or an external call, and these are notified by the speaker SP and the light emitting displays La and Lb. Perform display operation. The volume of the speaker SP can be adjusted by the volume control switch VS. Further, the telephone outlet B of this embodiment is provided with a microphone MC. The microphone MC may be integrally attached to the speaker SP.

Further, in this telephone exchange system, the intercom D is connected to the telephone exchange A by the telephone line L ₄ , and the intercom conversation can be performed using the telephone C. Note that the telephone exchange A also switches and forms the communication path between the intercom D and the telephone C. First, the configuration of the telephone exchange A will be briefly described together with the operation. In telephone exchanges A, as shown in FIG. 2, the relay contact r ₁ ~r ₆ provided for each extension L ₂ of the telephone outlet B is connected, extension L ₂ and external L ₁ in the relay contact r ₁ ~r ₆ The call current supply circuit 4 ₁ to 4 outputs the call current for an extension call or a doorphone call with the extension L ₂ disconnected from the extension L _{1 by} disconnecting the connection with
Supplied from 4 ₆ . The relay contacts r _{1 to} r ₆ are normally switched to the side for disconnecting the extension L ₂ from the outside L _1, and are switched to the side for the outside L ₁ only during an outside call.

An incoming call to the outside line is now detected by the incoming call detection circuit 5.
Then, the control circuit 11 composed of the CPU is
The extension L is driven by driving the signal generation circuit 23.₂Through doubt
Similar incoming signal (substantially the same as the incoming signal sent from the central office E)
, 16Hz) to telephone C,
Call the outside line by ringing the bell etc. built in machine C
It It should be noted that the pseudo incoming signal generation circuit 23 outputs the pseudo incoming signal.
Extension L₂The sending control circuit 24₁~ 24₆
Is provided, and this sending control circuit 24₁~ 24 ₆Behavior
Control is performed by the control circuit 11, and an arbitrary extension L₂Pseudo incoming
You can send a signal.

In response to this call, the handset of telephone C picks up.
When raised, relay contact r₁~ R ₆Is the outside line L₁Cut off
Hook / DP (dial pad)
Rus) Detection circuit 2₁~ 2₆Is phone C off-hook?
The response state is detected from the control circuit 1 according to the detected output.
Extension L to which 1 responded₂Relay contact r corresponding to₁~ R ₆
To change the extension L₂To the outside line L₁Connect to the outside line
Allows you to make calls. The hook / DP detection circuit 2
₁~ 2₆In addition to detecting the hook state of the telephone C,
For dial pulse (DP) signals input from telephone C
It also detects the dial signal.

In this way, when an outside line call is started, the control circuit 11 causes the display control circuit 18 to send a display signal to each telephone outlet B through the control line L ₃ , and the light emitting display portion La of each telephone outlet B. Is displayed to indicate that an outside line call is in progress. Next, when making an outside line from the telephone C, the receiver is lifted and dial operation is performed. 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 simulate a dial tone (two tone) sent from the telephone station E. Send a dial tone 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 telephone exchange system, call processing such as extension calling is performed by inputting a specific dial signal from the telephone C, so that even if the telephone C is dialed, it is an outside line call. However, there is a case of other call processing such as extension calling. Therefore, the control circuit 11 receiving the dial signal starts the outside line transmission operation 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). To start. This external line transmission is performed by once DC-closing the DC closing circuit 3 to capture the line and then driving the DP sending circuit 6 to send a DP signal to the external line L ₁ via the diode bridge DB.

When the calling party responds in response to the outgoing call from the outside line, the polarity of the outside line L ₁ is inverted. Therefore, this polarity inversion is detected by the polarity inversion detection circuit 16 and then the outside line L ₁ and the telephone set C that has made an outside line call. The relay contact r is switched so as to connect to the extension line L ₂ connected to the external line L ₂ to enable external line communication. Also at this time, the display control circuit 18 causes the telephone outlet B to display the outside line communication.

A dial tone transmitted through the outside line L ₁ , for example, a busy tone is detected by the outside line tone detection circuit 8.
At that time, a busy tone is sent from the signal sound generating circuit 20 to the telephone C which has made an external call, through the extension L ₂ . When making an extension call, the receiver is lifted and a dial signal is input in the same manner as in the case of making an outside call. The control circuit 11 determines from the number of digits of the dial signal that this extension call is made. At this time, the notification sound generation circuit 17 is driven to control the control line L corresponding to the telephone C on the called side.
_A notification sound signal is sent to the telephone outlet B through ₃ to cause the speaker SP of the telephone outlet B to ring the extension ringing tone. When the hook / DP detection circuit 2 detects that the telephone C is off-hook in response to the called side, the control circuit 11 controls the crosspoint switch 10 to extend the extension L corresponding to the telephone C on the calling side. ₂ and called telephone C
In response to the above, the extension L ₂ is connected to enable extension communication. 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 unspecified, a simultaneous 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 by controlling the crosspoint switch 10 to enable extension communication.

Here, at the time of the above-mentioned simultaneous call, voice communication can be performed between the telephone C on the calling side and the telephone outlet B on the called side. Therefore, in this embodiment, the microphone MC is provided in the telephone outlet B as described above, and the microphone MC and the speaker SP that is normally used to emit the notification sound are used to input and output the voice on the telephone outlet B side. It can be done. Then, as shown in FIG. 1, the telephone outlet B is a hybrid circuit that outputs the input voice from the microphone MC to the control line L ₃ and outputs the voice transmitted through the control line L ₃ to the speaker SP. A (2-wire to 4-wire conversion circuit) 30 is provided. That is, in the case of the present embodiment, the telephone outlet B is provided with the voice communication device including the microphone MC, the speaker SP and the hybrid circuit 30.

On the other hand, in the telephone exchange A, the dial operation corresponding to the general calling is performed, and after the ringing tone is sounded from each telephone outlet B, the general calling operation is performed by the cross point switch 10 under the control of the control circuit 11. The extension L ₂ to which the telephone set C that has performed the above is connected, and all the control lines L ₃ except the control line L ₃ corresponding to the extension L ₂ are connected. That is, any extension L ₂ and this extension L ₂
The cross point switch 10 and the control circuit 11 constitute a communication path forming means for forming a communication path with a control line L ₃ connected to a telephone outlet other than the telephone outlet B to which is connected. A call circuit 29 is provided between the crosspoint switch 10 and a terminal to which the control line L ₃ is connected, which enables a two-way call between the telephone outlet B and the telephone C.

By providing such a configuration, in the embodiment, as in the case of the conventional telephone exchange system, it is possible to make a voice contact using the telephone C on the calling side at the time of simultaneous paging. Moreover, in the case of the present embodiment, the voice communication can be responded to by inputting voice from the microphone MC of the telephone outlet B. That is, the telephone outlet B can be used like a hands-free telephone. Therefore, although the telephone outlet B is set as in the conventional case, a voice communication can be answered even in a room to which the telephone C is not connected. In addition, it is possible to use this function to monitor the sound in the room where the baby is present. In the above case, the case of simultaneous call is explained, but in addition, the two-way call is enabled at the time when the call path is formed between the telephone C and the telephone outlet B, for example, at the time of individual call. May be.

Further, in this telephone exchange A, the holding operation can be performed by the dial operation of the telephone C. At this time, the state in which the line is captured by the DC closing circuit 3 is held, and the holding melody sound is output by the holding sound sending circuit 9. Send through. In addition, at the time of this hold, the telephone C that makes an outside line call by a predetermined dial operation
It is possible to perform so-called external line transfer that replaces the above, an extension line response that answers an extension call, and a doorphone response that answers a call from the doorphone D. However, since this point is not directly related to the present invention, detailed description thereof will be omitted.

By the way, in the above description, the line contract is the dial pulse line, but when the line contract is the push button line, the PB signal from the push button type telephone C is used. The dial signal is detected by the PB receivers 12 and 13, and the line is closed by the DC closing circuit 3.
It operates in the same way as a dial pulse line except that it sends a dial signal to ₁ .

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 intercom call can be made by calling the intercom D from the telephone C.

By the way, when the electric lock I is installed at the entrance or the doorway, the opening / closing control of the electric lock I can be performed using the telephone C during the intercom conversation. .. In this case, when a specific dial signal is input from the telephone C during the intercom call, the opening / closing signal is given to the electric lock controller K through the opening / closing control circuit 26 so that the electric lock I can be locked / unlocked by remote control. Is becoming

Further, in the telephone exchange A, a security device (abnormality alarm device or emergency push button) is connected so that an emergency alarm can be issued by using the telephone outlet B or the intercom D. Here, the abnormality signal and the alarm signal are given to the control circuit 11 via the abnormality detection circuit 27. In addition, it is possible to receive various services such as call waiting service and triophone service carried out by NTT, and the call processing at this time is performed by the predetermined telephone C as in the case of extension call. It can be operated by dial operation (including hooking operation). Further, the telephone exchange A is a commercial power source (AC100
V) is used as a power supply, and the power supply circuit 28 creates and supplies power for each part from a commercial power supply.

By the way, in the telephone exchange A of this embodiment,
As shown in FIG. 4, the facsimile F can be connected to one specific extension L ₂ . Incidentally, when the facsimile F is not required, the phone C is connected to the extension L _2. In this embodiment, the facsimile incoming signal (1300 Hz) sent from the telephone central office E is detected so that the telephone C can receive the non-ringing incoming call service in which the facsimile F is automatically answered without ringing the ringing tone. A facsimile incoming signal detection circuit 22 is provided.

Now, the facsimile incoming signal detection circuit 22
When the facsimile incoming signal is detected by the control circuit 11, the control circuit 11 sets the extension L ₂ to which the facsimile F is connected to the external line L ₁
Connect to. As a result, if the facsimile F is compatible with the silent ringing service, the facsimile F can be automatically answered.

[0030]

As described above, the present invention is provided with a voice call device for making a voice call at a telephone outlet, and a call path is provided between any extension and a control line other than the control line corresponding to this extension. The telephone exchange is provided with a call path forming means for forming a call line and a call circuit which is inserted in the call path formed by the call path forming means and enables a two-way call between the extension line and the control line. , It becomes possible to make a two-way call between any telephone and a telephone outlet other than the telephone outlet to which the telephone is connected. For example, to respond to voice contact at the time of simultaneous ringing without using the telephone. You can

[Brief description of drawings]

FIG. 1 is a block diagram showing a main circuit at the time of simultaneous paging according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a circuit configuration of the same telephone exchange.

FIG. 3 is a front view showing the external appearance of the same telephone outlet.

FIG. 4 is a system configuration diagram of the above.

[Explanation of symbols]

A telephone exchange B telephone outlet C telephone L ₁ external line L ₂ internal line L ₃ control line SP speaker MC MC 10 cross point switch 11 control circuit 29 communication circuit 30 hybrid circuit

Claims (2)

[Claims] 1. A telephone exchange connected to an external line which is a public telephone line, and a plurality of telephone outlets connected to the telephone exchange through extension lines as communication lines and control lines as signal transmission lines, and A telephone exchange system comprising a commercially available telephone that is detachably connected to a telephone outlet, wherein the telephone exchange switches the call path between an external line and an internal line or between internal lines to enable an external line call and an internal line call on the telephone line. A voice call device for making a voice call is provided in a telephone outlet, and a call path forming means for forming a call path between any extension line and a control line other than the control line corresponding to the extension line and the call line formation means. A telephone exchange system characterized in that a telephone exchange is provided with a telephone circuit which is inserted into a telephone line formed by means and which enables a two-way telephone call between an extension line and a control line. Mu. 2. The call path forming means forms a call path between an extension on the calling side and a control line on the called side when all the other extensions are simultaneously called from any extension. The telephone exchange system according to claim 1, wherein: