JPH02214362A - Telephone exchange system - Google Patents

Abstract

PURPOSE:To monitor a sound of a room of other telephone set by connecting an extension connecting to a telephone plug socket to a control line connecting to other telephone plug socket and providing a monitor means sending the sound collected through a speaker of the telephone plug socket as a microphone to a telephone set. CONSTITUTION:A telephone plug socket B is provided with a voltage detection circuit 7 discriminating a display signal being a voltage signal sent through a control line l3 and a light emitting display device LD displaying respectively the busy state of an external line and an extension subject to lighting control by the voltage detection circuit 7. Speaker SP of the telephone plug socket B is used as a microphone, which collects sound of a room installed with other telephone plug socket B and the sound is listened to by a telephone set C. The speaker SP used for the telephone exchange system is a general dynamic speaker and connected to the control line l3 via a capacitor C1 as shown in figure, then the output of the speaker SP is amplified and used as a microphone.

Description

[Detailed description of the invention]

[Industrial Application Field 1] The present invention relates to a telephone switching system that switches and forms communication paths between external lines and internal lines, or between internal lines, and enables external and internal telephone calls using commercially available telephones. [Prior art 1] This type of telephone exchange system consists of a telephone exchange connected to a central office via an outside line, and a plurality of commercially available telephones connected to the telephone exchange via extension lines and control lines, each of which is detachably connected to the telephone exchange. It is equipped with a telephone outlet and can switch and form communication paths between external lines and internal lines, or between internal lines, so that external and internal phone calls can be made using a commercially available telephone. *In addition, in this telephone exchange system, a notification signal is sent from the telephone exchange to the telephone outlet via a control line, so that the telephone outlet performs a notification operation. [Problem to be Solved by the Invention 1] By the way, in this type of telephone switching system, when making an extension call, it is possible for the calling party to send voice from the speaker of the telephone outlet even if the other party's telephone handset is not picked up. Although there are things that can be done, there is no function that allows Phone C to monitor the audio from the room where Telephone @C is located, and I can't help but feel like I'm missing something. The present invention has been made in view of the above-mentioned points, and its object is to provide a telephone exchange system that is capable of monitoring voices in a room where other telephones are located.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a monitoring means that connects an extension line connected to a telephone outlet to a control line connected to another telephone outlet, and sends the sound collected using the speaker of the telephone outlet as a microphone to the telephone set. It is equipped with [Operation 1] The present invention enables the above-mentioned monitoring means to connect an extension to which a telephone outlet is connected to a control line to which another telephone outlet is connected, so that the extension to which the telephone outlet is connected and the other telephone outlet are connected. A communication path is formed between the connected control line and the sound collected by the speaker of the telephone outlet installed in another room can be monitored by the telephone. [Embodiment] In this telephone exchange system, an embodiment of the present invention is shown in FIG. The telephone outlet A) is connected to the telephone exchange 81A, and the door phone D is connected to the telephone exchange A through the telephone line 1. Each telephone outlet B is provided with a monoerasure jack M, through which a general commercially available telephone C can be detachably connected. Also, this telephone outlet) B has a control line! A speaker SP is provided for reproducing notification signals such as an extension or a doorphone ringing tone sent through the . As shown in FIG. 1, the above-mentioned telephone exchange A includes an incoming call detection circuit 2 that detects an incoming outside line call, a hold circuit 3 that holds the outside line call status when an outside line call is received, and enables an internal call or a doorbell call. #111 and extension I2, inside #! l z each other,
Or extension 12 and the call line! , and the telephone C'? A l'7 phone call circuit 5 provided for answering doorphone calls and a telephone outlet B for transmitting notification sounds such as extensions or doorphone ringing tones.
The control circuit 1 includes an audio sending/monitoring circuit 6 that sends out signals to the computer, and a control circuit 1 that includes a CPU that performs operations such as exit control of control information signals of each of the circuits mentioned above and signal judgment processing. An outline of the operation of this telephone exchange fiA will be explained. First, when a waiting telephone gc goes off-hook, the call control circuit 4 detects this off-hook state and connects the extension 12 to the control circuit 1. At this time, the control circuit 1 sends a pseudo dial tone to each telephone set C through the extension line 12. Then, when the telephone @C is dialed and the first dial signal is input, the sending of the pseudo dial tone is stopped. The data (number) of the dial signal is stored in the built-in pad 7T, and at the same time, the operation of the built-in 3 second timer is started. If a second dial signal is input while this timer is operating, telephone exchange A determines that an outside line call has been made. Note that if the second dial signal is not input within 3 seconds, it is determined that the call is an extension call. In the case of an outside call, the control circuit 1 sequentially stores the input dial signal data in the built-in buffer 7, and also controls the hold circuit 3 including the DC connection circuit to close the line. Let it happen. When an outside line dial tone is detected, data indicating a certain dial number stored in a built-in buffer is read out sequentially from the first one, and a button dialer (not shown) or a dial relay is operated to sequentially transmit the dial signal to the outside line. 1. After a certain period of time, the extension 12 connected to the dialed telephone B and the outside #I e + are connected by the call control circuit 2 to enable an outside call. Next, the operation of extension calling will be explained. When making this extension call, the telephone fiB is off-hook and a dial signal specifying the telephone IaB of the other party to be called is input. Since this dial signal is a single number, the second dial signal is not input even after the 3 seconds set in the built-in timer of telephone exchange A have elapsed. Therefore, from this, telephone exchange fiA determines that it is an extension call. . At this time, a notification signal for the extension ringing tone is sent out via the voice sending/monitoring circuit 6 to the control line 1 corresponding to the telephone set C corresponding to the data of the dial signal. The telephone outlet (B) to which this notification signal has been sent emits a ringing tone from the speaker SP. When the handset of telephone @C is picked up due to this ringing, the telephone exchange fiA detects this off-hook and connects the calling side's extension 12 and the called side's extension 12 using the call control circuit 2 to make an extension call. is possible. In the above case, a specific telephone C was called, but in this telephone switching system, it is also possible to call all telephones C all at once. This simultaneous ringing is performed by inputting a dial signal corresponding to this simultaneous ringing. When this dial signal is input, the telephone exchange 1g1A sends a notification signal for ringing through each control line I to each telephone outlet) Send to B. When the handset of any telephone @C is picked up by this ringing tone, the control circuit 1 performs call control between the extension 12 connected to the telephone CfIf that made the simultaneous ringing, and the extension 12 connected to the telephone mCIJt that picked up the handset. The circuit 2 is controlled and connected to enable extension calls. Next, a case where an outside call is received will be explained. When the incoming call detection circuit 2 detects an incoming signal, external #ip +
to each extension! 2 and each telephone outlet) rings the built-in bell of the telephone @C connected to B. When the handset of any telephone C is picked up by this ringing,
The control circuit 1 detects this and controls the call control circuit 4 to connect only the inner alie 2 to which the telephone WIC from which the handset has been picked up is connected to the outer AT, thereby making it possible to make an outside call. Further, in this telephone exchange system, it is possible to put the call on hold in order to make an internal call or a doorbell call during the outside line call. Even in the case of this hold recovery, a dial signal corresponding to the hold is inputted using the telephone WiC. The control circuit 1 reads this dial signal and controls the call control circuit 4 to indicate that an outside line call is in progress. And an outside line! , and connect #@12 to another extension 12 or call line 1 of door phone D. Connect to
Allows for internal calls and doorphone calls. And during this period of internal calls, etc., external calls! , are kept in a pending state in a pending circuit 3. If you want to return to the outside line call state from the above-mentioned hold state,
By inputting the dial signal corresponding to the above-mentioned hold again from the telephone set C, the control circuit 1 that has detected this dial signal cancels the hold operation, controls each part to the above-mentioned outside line call state, and makes the outside line call. possible. In addition, telephone outlet) B has #! As shown in FIG.
The terminal is equipped with a light-emitting display LD that is controlled to emit light and displays whether an outside line or an extension call is in progress. Note that the notification signal is sent to the telephone outlet B superimposed on the display signal. The above has been a description of the basic components of the telephone exchange system, and the features of this embodiment will be described below. In this embodiment, the speaker SP of the telephone outlet B is used as a microphone to collect the sound from the room where another telephone outlet B is installed, and this sound is transmitted to the telephone Il! I made it so that I could listen to it on AC. The speaker SP used in this telephone exchange system is a general dynamic speaker, and as shown in FIG. If amplified, it can be used as a microphone. Therefore, as shown in FIG. 3, the output of the notification sound generation circuit 8, which generates notification sounds such as ringing tones, is amplified by connecting the control line p to which each telephone outlet (B) is connected to the audio output/monitor circuit 6. A switching means 10 is provided for disconnecting from the amplifier 9 for driving the speaker, and a switching means 11 is provided for connecting one of the controls 813 to the amplifier 12 for amplifying the audio signal. This monitoring operation is performed by the control circuit 1 switching the switching means 10tll by dialing the telephone C. This monitoring operation will be explained below with reference to chart 70 in FIG. In this embodiment, when performing a monitor operation using telephone *C, a dial signal (for example, 9, 9) specifying the monitor operation is input, and the extension number to be monitored is input as a dial signal after this dial. 1 For example, if the extension number of the phone IfiC in the room you want to monitor is 2
If so, dial signal 992 is input. From this dial signal, the control circuit 1 determines that extension number 2 is to be monitored, and by disconnecting all the control lines 13 from the amplifier 9 by the switching means 10 and closing the contact corresponding to extension number 2 of the switching means 11, the control circuit 1 determines that extension number 2 is to be monitored. A control #a t' y corresponding to 2 is connected to the amplifier 12. At the same time, the call control circuit 10 is switched to connect the amplifier 12 to the dial #112 on the monitor side.
A communication path is formed between the caller and the control line l corresponding to extension number 2, and the voice collected by the speaker SP can be heard on the telephone C of the calling side. [Effect of the Invention J As described above, the present invention connects an extension line connected to a telephone outlet to a control line connected to another telephone outlet,
It is equipped with a monitoring means that uses the speaker of the telephone outlet as a microphone to collect sound and sends it to the telephone set, so a communication path is formed between the extension line connected to the telephone outlet and the control line connected to another telephone outlet. This has the effect of allowing you to use your phone to monitor the sound picked up by a speaker in a phone outlet installed in another room. Moreover, since the speaker originally provided in the telephone outlet is used as a microphone, there is no increase in cost, and there is an advantage that the wiring connecting the telephone outlet and the telephone exchange can be reduced to 4M, which is the same as in the past.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing a schematic configuration of an embodiment of the present invention, Fig. 2 is a circuit diagram of a telephone outlet, Fig. 3 is a specific circuit diagram of an audio output/monitor circuit, and Fig. 4 shows the operation of the same. 70-chart shown. A is a telephone exchange, B is a telephone outlet, C is a telephone, E
1 is a telephone station, SP is a speaker, 1 is a control circuit, 6 is an audio output/monitor circuit, and 10.11 is a switching means.

Claims (1)

[Claims] (1) A telephone exchange connected to a telephone office via an outside line;
It consists of a plurality of telephone outlets connected to this telephone exchange by extension lines and control lines, respectively, and into which commercially available telephones can be connected detachably. In a telephone exchange system that enables telephone calls and extension calls using the above-mentioned telephone set, and also sends a notification signal from the telephone exchange to the telephone outlet via a control line, and performs a notification operation from the speaker of the telephone outlet, the telephone outlet is connected. A telephone exchange system comprising monitoring means for connecting an extension line to a control line connected to another telephone outlet, and transmitting sound collected by a speaker of the telephone outlet as a microphone to a telephone set.