JPH04108292A - Telephone exchange system - Google Patents

Abstract

PURPOSE:To additionally install an arbitrary annunciator or indicator by providing an expansion unit which outputs an identification signal in corresponding to a signal sent through a control line and makes the arbitrary annunciator or indicator to produce an audible ringing signal or to indicate a busy state in accordance with the identification signal. CONSTITUTION:An expansion unit F actuates commercial power supply as its power source, is provided with a voltage identification circuit 26, and identifies the voltage of a display signal sent from a telephone exchange A through a control line l3 by means of the circuit 26. The circuit 26 is provided with relays Ry21 and Ry22, outputs identification signals to the outside through the contacts r21 and r22 of the relays Ry21 and Ry22, and displays the busy state of a main trunk like or extension through an arbitrary indicator such as flasher, etc. Therefore, an arbitrary annunciator or indicator can be connected to a control line through the extension unit F and arriving of an incoming call from a main trunk line or presence of a call from an extension can be surely informed to users by additionally installing, for example, an annunciator having a large sound volume.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a technology for adding optional notification devices and display devices to a telephone exchange system that allows outside and internal calls to be made using commercially available telephones. be.

[Prior Art] The system configuration of this type of telephone exchange system is described in the fifth (!l
Shown below. This telephone exchange system consists of a telephone exchange ellA connected to a telephone office via a public T!
A commercially available telephone L is connected to an extension line 12 and a control line e, respectively.
It consists of a plurality of telephone outlets B to which the RC is removably connected, and the above telephone exchange mA switches and forms a communication path between external line L and internal line 1 or between extensions 12 and 12, and is connected to telephone outlet B. Telephone C can be used to make outside calls and internal calls. In addition, in this telephone exchange system, door phone D is connected to telephone exchange A by one call me, and door phone calls can also be made using IC call IIC.

Each telephone outlet B is provided with a modular jack M, through which a general commercially available telephone C can be detachably connected. Also,
This T-talk outlet B has a speaker SP for reproducing notification signals such as extension ringing or doorphone ringing sent via the control line 13, and a voltage signal sent via the control line 13. A light-emitting display section La that distinguishes a certain display signal and displays whether an internal call is in progress or an external call is in progress.
.

Lb, and the speaker SP and light emitting indicators La and Lb are used to perform notification and display operations. Note that the volume of the speaker SP can be adjusted using a volume control switch VS.

[Problem to be Solved by the Invention] By the way, depending on the location where this type of telephone exchange system is installed, it may be difficult to ensure that the user receives a call using only the number of telephone outlets B corresponding to the number of telephones. In some cases, it may not be possible to notify the user that the phone is busy or to notify the user that the phone is busy, so it is possible to optionally install an alarm device that notifies the user of a ring tone or a display device that shows that the phone is busy in addition to telephone outlet B. desired.

The present invention has been made in view of the above-mentioned points, and its purpose is to provide a telephone exchange system in which arbitrary notification devices and display devices can be added. [Means for achieving the above object] In order to achieve the above object, the present invention operates using a commercial power source as a power source, outputs an identification signal corresponding to a signal sent through the above control line, and outputs an arbitrary signal according to the identification signal. It is equipped with an extension unit that allows the notification device or display device to notify a ringer or display a busy message.

[Function] By providing the extension unit as described above, the present invention allows any notification device or display device to be connected to the control line via the extension unit.

[Example] An embodiment of the present invention is shown in FIGS. 1 to 5.

Note that the configuration of telephone exchange A will be explained first.

As shown in FIG. 3, this telephone exchange A has a relay contact r for each extension 12 to which telephone C2 is connected. & flow supply circuits 41-4. (PB) dialer 7, outside line dial tone detection circuit 8 that detects outside line dial tone, hold tone sending circuit 9 that sends hold tone, cross point switch 10 that sets call route, PB receiver 1213 that receives button button signal , a sound generation circuit 17 that generates various notification sounds.
, a display control circuit 18 for displaying the call status at the telephone outlet B, and an amplifier AMPI-AMP4. It is provided with a control circuit (1) consisting of a diode bridge DB, gates G, -G3, and a CPU that performs control information signal transmission control and signal determination processing for each of the above circuits and circuits to be described later.

On Saturday, the second L71 telephone exchange RA receives a call from the door phone D '5: The door phone call detection circuit 14 detects the call from the door phone D. ．． 14
2 and the doorphone call circuit 15 are II j. In addition,
In this telephone communication system, a security device and an emergency push button can be connected, and an alarm sound can be output from telephone outlet B when an abnormality occurs. +: An abnormality detection signal from the security device is detected by the security signal detection circuit 16. .

The operation of this telephone switching system will be explained. Telephone exchange A
When the power is turned on and the system starts, the control circuit 11 first performs initial settings and then enters a standby state.
Determination 5 of Off-Hook 2 Further, it determines whether there is an incoming outside line call and processes the outside line call, determines whether there is a doorphone call and processes the doorphone call, determines whether there is an extension call, processes the internal line call, and processes the outside line call.

Now, when the handset of any telephone C is picked up, the hook/DP detection circuit 2 provided in the extension 12 to which the telephone C is connected detects off-hook and outputs a detection signal to the control circuit 11. At this time, the control circuit 11 normally connects the relay contacts r1 to 400 through the extension line 12, which are switched to the cross point switch 10 side.
Telephone C that is off-hook receives a pseudo-outgoing signal consisting of Hz.
At the same time, the display control circuit 18 is controlled to light up the light-emitting display section La for indicating that an outside line call is in progress at each telephone outlet B.

The sending of this pseudo call signal continues until the dial signal is input, and when the first dial signal is detected by the hook/DP detection circuit 2, the control circuit 11 stops outputting the pseudo call signal and stores the dial data in the built-in dial signal. The data is stored in a FIFO-type buffer memory, and at the same time a built-in 3-second timer is operated. When the second dial signal is detected while this timer is operating, the control circuit 11 determines that it is an outside line call, performs outside line call processing, and if the second dial signal is not input within 3 seconds. It determines that the call is an extension call and performs extension call processing.

Now, in the case of making an outside line call, the control circuit 11 sequentially stores the dial signals that are input successively into the barnofa memory, operates the DC connection circuit 3, and the outside line dial tone detection circuit 8 detects the outside line dial tone. When detected, the dial data stored in the sofa memory is sequentially read out from the first dial data, and the dial pulse generating circuit 6 is operated to sequentially send dial signals to the outside line 11. When the dial data stored in the buffer memory is exhausted and a certain period of time has passed, the relay contact r is switched to connect the extension 12 connected to the off-hook telephone C to the outside line, and an outside line call is possible. do.

Next, in the case of an extension call, when 3 seconds have passed after the input of the first dial signal, the control circuit 11 determines that the call is an extension call, and lights up each telephone outlet B from the off-hook of the telephone C. The light-emitting display section La indicating that an outside line call is in progress is turned off, and at the same time, the light-emitting display section Lb indicating that an extension line call is in progress is turned on. At the same time, the control circuit 11 controls the sound generating circuit 17 to send a notification signal for an extension call to the telephone outlet B to which the called telephone C is connected via the control line e. The extension call origin is sounded from the speaker SP. Note that this notification signal is sent out superimposed on the display signal. When the handset of the telephone C connected to the telephone outlet B is picked up due to this extension call, the hook-DP detection circuit 2 detects this off-hook, and the control circuit 11 outputs an extension ring tone based on this off-hook. At the same time, the telephone C that made the call was connected by the crosspoint switch 10!
! e2 and the extension l to which the telephone WiC of the called party is connected are connected to enable an extension call.

By the way, while the above-mentioned extension call is a case of calling a specific extension, this telephone switching system also allows calling all extensions at once. In this case, it is sufficient to input a dial signal corresponding to simultaneous ringing from telephone C, and when the handset of any telephone C is picked up in response to the extension ringing tone from speaker SP of each telephone outlet B, the above-mentioned In the same way as when calling a specific extension, an extension call can be made by using the telephone C that answers the call.

Next, receiving an outside call will be explained. When you receive an outside call,
The incoming call signal is detected by the incoming call detection circuit 5, and the incoming call detection signal is input to the control circuit 1. At this time, one contact r of the control circuit 11 is switched to connect the extension line 12 and the outside line e1, and the built-in bell of each telephone set C rings in response to the incoming call signal. At this time, when the built-in bell of the telephone C rings, the user picks up the handset of the S-filling machine C, thereby making it possible to make an outside call. Note that when the telephone C is off-hook as shown in FIG.
lights up to indicate that an outside call is in progress.

By the way, in this telephone exchange system, it is possible to put an outside line call on hold and make an internal call or a doorbell call.

In this case, when a dial signal corresponding to hold is input from the telephone C during an outside line call, the control circuit 11 reads this dial data, disconnects the extension 12 from the outside line 11, and disconnects the extension 12 from the outside line 11. Operate the outside line 1. put on hold. And control circuit 1
1 operates the hold tone sending circuit 9 to send a hold tone melody to the outside line l through the coupling transformer T, thereby notifying the other party of the outside line that the call is on hold. In addition, at this time, the display control circuit 18 is also controlled and both light-emitting display portions L for use during a call are activated.
Both a and Lb are lit to display that the process is on hold.

Now, after entering the above-mentioned hold state, if a dial signal for making an extension call or a doorbell call is input from telephone C, the extension call processing described above or the doorbell call processing described later will be performed, and the extension call or doorbell call will be terminated. It becomes possible.

Incidentally, in order to prevent the dial signal input from the telephone set C during this outside line call from being output to the outside line 11, the DC connection circuit 3 is temporarily closed at the same time as the input of the dial signal.

An extension call or the like that is on hold is terminated by turning telephone C on-hook, and returning to the hold state by picking up the handset of Ift telephone C again.

If the user wishes to make an outside line call again, a power dial signal for canceling hold is input from telephone C to cancel the hold. At this time, the control circuit 11 stops the operation of the hold tone sending circuit 9, controls each part to return to the original outside line call state, and returns to the outside line call state.

After being released from hold, it is sufficient to put telephone C on-hook to end the call.

The case where there is a doorbell call will be described below. When making a call from door phone D, a push button provided on door phone D is pressed. The fact that this push button has been pressed is detected by the doorbell call detection circuit 14, and the control circuit 11 responds to this detection output.
operates the sound generating circuit 17 to cause each telephone outlet B to sound a doorbell ring tone. Then, when the handset of any telephone C is picked up in response to the doorbell ringing, the control circuit 11 is crossed by the output of the hook/DP detection circuit 2 installed in the extension 12 to which the off-hook telephone C is connected. By switching the point switch 10, the telephone C from which the hand is picked up is connected to the doorphone call circuit 15 to enable the doorphone call.

In Toniro, this doorphone call is made from telephone outlet B even during an outside line call, and when a dial signal specifying doorphone D is input from telephone C after the above-mentioned hold in response to this call, the outside line is put on hold. You can make doorbell calls.

In addition, in the above explanation, a dial-pulse type telephone was used as the telephone C, and the external line e, which is a public telephone line, was explained as a dial-pulse line, but the external line 1
1 is a button line, and when a button type telephone C is used, the PB dialer 7 sends out a dial signal, and the PB receiver 12 and 13 detect the dial signal. , operates similarly to the description above.

Next, the configuration of the tWI outlet B will be explained according to FIG. 4. This T-talk outlet B includes a notification circuit 28 composed of a DC cut capacitor C1 and a speaker SP, and a light emitting diode La.

Lb, transistor Q,. ~Q + 3 and a display circuit 27 composed of Zener diodes ZD and ~ZD, the display circuit 27 identifies the voltage of the display signal sent via the control line l, and responds accordingly. The notification circuit 28 extracts the audio signal superimposed on the display signal using the capacitor C7, and causes the speaker SP to emit various ring tones such as an extension call.

The expansion unit F, which is a feature of this embodiment, will be explained below. This expansion unit F can be connected to a display device such as a flasher that indicates when an outside call is in progress or an extension call is in progress. For this reason, this extension unit F operates as a commercial Kl (Ac 10oV) 8 electric fi.
At step 6, the voltage of the display signal sent from the telephone exchange A via the M four-wire l is identified. However, this voltage identification circuit 2
6, the light emitting diodes La, L of the display circuit 27
relay Ry2.b instead of relay Ry2.b. ．． Ry, □, and these relays Ry21. Contact point r21 of Ry22. An identification signal is output to the outside of the rB station, and an arbitrary display device such as a flasher can be used to display whether an outside line call or an internal line call is in progress. A buffer 25 for increasing the input impedance is provided on the input side of the voltage identification circuit 26 so that a plurality of expansion units F can be connected to the control line. This extension unit F has the function of sending and wiring an extension line 12 and providing a module M to add a telephone C. In addition, although this embodiment shows the case where a display device is added, if the circuit detects and outputs an audio signal such as a call signal superimposed on a display signal, it may be possible to generate an arbitrary signal such as emitting a high volume. It is possible to add additional notification devices.

By the way, in order to achieve the original function of the above-mentioned expansion unit F, it is sufficient to simply connect it in parallel to the control line 1 so that an alarm device etc. can be added, but as shown in Fig. 5. The extension unit F is provided with a display circuit 27 and a notification circuit 28 for the telephone outlet B, and this extension unit F'
It may also be possible to make it possible to make a ring tone and display a call-in-progress display on the telephone itself, and also to provide a module controller M by sending and wiring extension e2, so that more telephones C can be installed. As shown in FIG. 3, the case of the expansion unit F' in this case is formed of a box-shaped body 41 with an open top and a cover 42 that is attached to this body 41. It is a ready-made product that is used when embedding wiring devices, for example, by forming it into two dimensional modules (one module of three wiring devices vertically and two horizontally of the same size). It can be detachably attached to the attachment frame 43 of. Specifically, in order to attach to the mounting frame 43, from the side edge of the outer flange 47 of the cover 42 to the mounting frame 43,
A locking pawl 49 is provided protrudingly to be inserted and locked into an insertion hole 48 formed on both sides of the cover. A printed circuit board 44 on which circuit components constituting each of the above circuits are mounted is housed inside the case, and a sound output slit 50 for the speaker SP, a transparent window 51 for the light emitting diodes La and Lb, etc. are formed in the cover 42. It is. In addition, the input/output terminals 53 such as input terminals, contact output terminals, and feed wiring terminals connected to the extension line 12 and the control line i are of a screw type. It is placed on the side.

[Effects of the Invention] As described above, the present invention operates using a commercial power source as a power source,
An additional unit is provided which outputs an identification signal corresponding to the signal sent through the control line and causes an arbitrary notification device to notify a ringer or a display device to indicate a busy state according to the identification signal. Therefore, it is possible to connect to any notification device or display device 3 control line via an extension unit.For example, by adding a high-volume notification device, you can ensure that there are incoming outside calls, internal calls, etc. This has the advantage of being able to inform the user.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of an expansion unit according to an embodiment of the present invention.
Figure 2 is an exploded perspective view of an extension unit with a notification display function, Figure 3 is a circuit diagram of the same telephone exchange as above, Figure 4 is a circuit diagram of a telephone outlet, and Figure 5 is an expansion unit with a notification display function. FIG. 1 is a system configuration diagram of a power telephone exchange system including a unit. A is a telephone exchange, B is a telephone outlet, 0 is a telephone, F
, F' is an extension unit, ■ is a notification device, l is an outside line, 1
2 is an extension line, and e is a control line. Agent Patent Attorney Ishi 1) Choshichi

Claims (1)

[Claims] (1) A telephone exchange connected to an outside line that is a public telephone line, a telephone outlet connected to this telephone exchange with an extension line as a calling line and a control line as a signal transmission line, and a telephone outlet that can be freely connected to and detached from the telephone outlet. A commercially available telephone is connected to the telephone exchange, and the above-mentioned telephone exchange allows external and internal calls to be made by switching connections between external lines and internal lines, or between internal lines, and is sent from the telephone exchange via a control line. In a telephone switching system in which the above-mentioned telephone outlet receives a signal indicating a ringing or busy state and displays a ring tone or indicates a busy state, the telephone exchange system operates using a commercial power supply as a power source and responds to the signal sent through the above-mentioned control line. What is claimed is: 1. A telephone exchange system comprising: an extension unit that outputs a corresponding identification signal, and causes an arbitrary notification device or display device to notify a ringer or display a busy state according to the identification signal.