JPH03186096A - Telephone exchange - Google Patents

Abstract

PURPOSE:To eliminate need for an additional power supply for a local operation unit by providing a power supply circuit generating a power supply for a control circuit from a speech current supplied to a telephone set via an extension till the point of time of the end of transmission of a pseudo speech processing signal from the operating point of time of a switch to the local operation unit. CONSTITUTION:A local operation unit is provided, which is able to implement the communication processing to be executed by the operation of a telephone set in place of the telephone set. The local operation unit is provided with a signal transmission means 20 having plural switches SW1, SW for the communication processing on the upper face to apply connection/disconnection with a telephone set of the telephone set and to send a pseudo communication processing signal to the telephone exchange, a control circuit 21 comprising a CPU controlling the operation of the signal transmission means 20 in response to the selected switches SW1, SW, a power supply circuit 22 generating the power supply for the control circuit 21 from the speech current supplied to the telephone set via an extension till the point of time of the transmission of the pseudo communication processing signal from the point of time of the operation of the switches SW1, SW. Thus, an additional power supply for the local operation unit is not required.

Description

DETAILED DESCRIPTION OF THE INVENTION 1. Field of Industrial Application 1. The present invention enables external and internal calls to be made using a commercially available telephone, and allows call processing such as holding and internal calls that are normally performed by operating the telephone instead of the telephone. The present invention relates to a telephone switching device equipped with a hand-held operation unit that can perform operations.

[Prior art] The system configuration of this type of telephone exchange I1 is shown in FIG. A telephone exchange A is connected to a telephone office E, and a commercially available telephone If! is connected to the telephone exchange A through an extension line 12 and a control line L, respectively. It is composed of a plurality of telephone outlets)B to which AC is detachably connected, and the above-mentioned telephone exchange A switches and forms a communication path between the outside #i1゜ and the inside 41t2 or extension 12, and the telephone outlet)BG : Connected telephone C can be used to make external calls and internal calls.In addition, with this telephone switching device, calls 111A1. By connecting the door phone D to the telephone exchange 41111A, it is possible to make door phone calls using the telephone MC.

Each telephone outlet B is equipped with a mono-era jack M, which allows a general commercially available telephone C to be detachably connected to it.
This telephone outlet) B has a speaker SP for reproducing notification signals such as extension ringing or doorphone ringing sent via the control line L, and a voltage signal sent via the control Mls. 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 these speakers SP and light emitting displays r#I-, a, and Lb are used to perform notification and display operations. The volume of the speaker SP can be adjusted using a volume control switch VS''cIllI.

[Problems to be Solved by the Invention] By the way, this type of telephone exchange equipment is capable of handling extension calls, holding calls,
- It is possible to perform various call processing such as simultaneous ringing and doorbell call answering, and it is possible to use a general commercially available telephone as the telephone.
Call processing is performed by a dialing operation.

However, when call processing is performed by dialing a telephone or using a 77-key operation, the user must memorize the operations corresponding to call processing, and it is not possible for anyone to easily perform call processing operations. Moreover, in this type of telephone exchange equipment, the telephone exchange system is designed taking into consideration the case of receiving a call waiting service, etc., so there are regulations such as the permissible time range for the 77 king operation, and call processing operations are limited. There was a problem that it was troublesome.

Therefore, in order to make it easier for the user to handle calls, some devices are equipped with a hand-operated unit that can perform call processing that would normally be done by operating a telephone instead of the telephone.

By the way, this hand-operated unit is generally attached to a telephone exchange iIC station at the request of the user.
The power supply was separate from the telephone exchange equipment.

Therefore, in order to supply power to each hand-held control unit, it is necessary to wire a power line for each hand-held control unit.
This was a problem that made construction difficult. *Also, there are devices that use batteries as a power source, but in this case, they require space to store the batteries, resulting in a large size, and there is also the problem that the batteries may run out and become inoperable.

The present invention has been made in view of the above-mentioned points, and its purpose is to provide a telephone switching device that does not require a separate power source for the hand operation unit [To solve problem No. 111] Means 1 In order to achieve the above object, the present invention provides power for the control circuit from the call current supplied to the telephone via the extension line from the time when the switch is operated to the time when the sending of the pseudo call processing signal ends. The power supply circuit to be created is installed in the hand-operated unit.

[Function 1] By having the above-mentioned configuration, the present invention enables the power for the hand-held operation unit to be obtained from the communication current supplied to the telephone, thereby eliminating the need for a separate power supply for the hand-held operation unit. It is something.

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

First, the configuration of the telephone exchange fiA will be explained. As shown in FIG. 4, this telephone exchange A has relay contacts "1 to r5.
Dial pulse (DP) detection circuit 2. ~2. and call current supply circuits 41 to 43, and further includes an incoming call detection circuit 5,
DC connection circuit 3, DP for making outside calls using dial pulses
A generating circuit 6, a button (P B ) r earer 7 that uses a button tone to make an outside call, an outside line dial tone detection circuit 8 that detects an outside line dial tone, a hold tone transmission circuit 9 that sends a hold tone, and a call route. a cross-point switch 10 for setting the button, a PB receiver 12-13 for receiving the button signal, a sound generation circuit 17 for generating various notification sounds,
Display control circuit 18 for displaying the call status at telephone outlet B, amplifiers AMP, -AMP, rIode Blitz DB, DA) G+ to G5, and control information signal transmission control and signals for each of the above circuits and circuits to be described later. The control circuit 11 includes a CPU that performs determination processing.

Furthermore, this telephone exchange fiA has a doorphone call detection circuit 14 for detecting a call from the doorphone D. ．． 142 and a doorphone call circuit 15. Although not shown in Fig. 6, this telephone exchange equipment can also be connected to a security device and an emergency push button, so that an alarm can be sounded from telephone outlet B in the event of an abnormality. The anomaly detection signal from a is detected by the security signal detection circuit 16.

The operation of this telephone exchange device will be explained. When the power is turned on and the system starts in A-talk exchange A, the control circuit 11 first performs initial settings, then enters a standby state, determines off-hook, and then determines whether or not there is an incoming IIA call, processes external calls, and performs door intercom operations. It determines the presence or absence of a call, processes a doorphone call, determines the presence or absence of an extension call, processes an extension call, and processes an outside call.

Now, when the handset of any telephone IIc is picked up, that telephone C is connected to 1/l l! A hook/DP detection circuit 2 provided in the DP detects off-hook and outputs a detection signal to the control circuit 11. At this time, the control circuit 11 switches the relay contact rl-r3, which is normally switched to the outer #i11 side, to the cross point switch 10111, and sends a pseudo transmission signal of 400 Hz to the inner #i11 side.
Send it to the off-hook telephone charge C through A l 2,
At the same time, each telephone outlet is controlled by controlling the display control circuit 18)B.
At this time, the light-emitting display section La for indicating that an outside line call is in progress is turned on.

The sending of this pseudo call 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 stores successively input dial signals in the buffer memory, operates the DC connection circuit 3, and detects the outside line dial tone in the outside line dial tone detection circuit 8. Then, the dial data stored in the buffer memory are 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. Then, when the dial data stored in the buffer 7 memory is exhausted and a certain period of time has passed, extension 1 to which the off-hook telephone C was connected
2 to outside line 1. Switch the relay contact so that it connects to the terminal, allowing outside calls.

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 call is in progress is turned off, and at the same time, the light-emitting display sLb indicating that an extension call is in progress is turned on. At the same time, the control circuit 11 controls the sound generation 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 (1), The extension ring tone is emitted from the speaker SP. Note that this notification signal is sent out superimposed on the display signal. When the handset of the connected telephone 11c is picked up by this extension ringing tone, the hook/DP detection circuit 2 detects this off 77 hook, and the control circuit 11 detects this off 77 hook. Based on this, the extension ringer is stopped, and the crosspoint switch 10 connects the extension 12 connected to the telephone C that made the call to the extension Mt'2 connected to the telephone C on the called side to make an extension call. is possible.

By the way, although the above-mentioned extension call is a case where a specific extension is called, this telephone exchange device can also call all extensions at once. In this case, it is sufficient to input a dial signal corresponding to simultaneous ringing from the telephone WIC, and when the handset of any telephone C is picked up in response to the extension ringing tone from the 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 in the dark with telephone C that answers.

Next, receiving an outside call will be explained. When you receive an outside call,
A built-in bell rings in each telephone mc.

The ordinary signal at this time is detected by the incoming call detection circuit 5, and the incoming call detection signal is input to the control circuit 11. If the user picks up the handset of telephone C in response to the ringing of the built-in bell of telephone C, an outside call can be made. In addition, when the telephone 1flc is turned off in this way, the control circuit 11 switches each telephone outlet according to the output of the hook/DP detection circuit 2).
B's luminescent display gt.

Turn on the a button and it will show that an outside line call is in progress.

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

In this case, when a dial signal corresponding to hold is manually input from the telephone C during an outside call, the control circuit 11 reads this dial data and disconnects the extension 12 from the outside #i11, and also disconnects the extension 12 from the outside #i11. and puts the outside line e on hold. And control circuit 1
1 activates the hold tone generation circuit 9 to send a hold tone melody to the outside line 11 via the connecting tran XT to notify the other party of the outside line that the call is on hold, and also sends the hold tone melody to each telephone outlet B. B to make the user aware that it is on hold, and at the same time, the display control circuit 1
8 to light both light display sections La+I-b for the call in progress, and display a display indicating that the call is on hold. ? make it happen

Now, after entering the above-mentioned hold state, if a dial signal for making an extension call or a doorbell call is input from the telephone WIC, 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, here, the dial signal input from telephone C during this outside call is outside #i1. In order to prevent the signal from being output, the DC connection circuit 3 is temporarily closed at the same time as the dial signal is input.

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 telephone C again.

If the user wishes to make an outside call again, a 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 held music exit circuit 9, controls each part to return to the original outside line call state, and returns to the outside line call state.

After the call is released from hold, the telephone WIC can be turned on-hook to end the call.

The case where there is a doorbell call will be described below. When making a call from the door phone D, press a push button provided on the door phone D. Pressing of this push button is detected by the door phone call detection circuit 14, and the control circuit 11 responds to this detection output.
operates the sound generating circuit 17, and causes each telephone number B to sound a doorbell ringing tone. Then, when one of the telephones IRC 7) is picked up in response to the doorbell ringing, the off-hook telephone aC is controlled by the output of the book/DP detection circuit 2 installed in the MZ2 connected to it. Circuit 11 toggles crosspoint switch 10 to remove the handset from the telephone WIC
and a doorphone call circuit 15 are connected to enable doorphone calls.

By the way, this doorphone call is made from telephone outlet B even during an outside line call, and if in response to this call, after the above-mentioned hold, a dial signal specifying doorphone D is input from telephone C, the outside line will be put on hold and the doorphone will be called. Can make calls.

In the above explanation, a Guyalpulse type telephone is used as the telephone C, and the external line 1, which is a public telephone line, is the dial pulse line INI'? The explanation was about a certain case, but outside @1. is a button line, and if you use a button type telephone C, the PB diamond? -7
Sends a dial signal with P, and detects the dial signal with P.
The operation is similar to that described above, except that the B receivers 12 and 13 are used.

The hand-operated unit (F) of this embodiment, which is a feature of the present invention, will be explained below. Then, insert the Monoera plug P into the Monoerasha plug M of the telephone outlet B and fill it inside.
t2, and the telephone C is connected to the mobile phone M included in the hand-held operation unit F. With the handheld operating unit F and telephone C connected in this way, the handheld operating unit F and telephone C are connected to extension e2 as shown in FIG.
will be connected in parallel to #&. However, after the telephone C is normally closed, which will be described later, it is connected to the extension 12 via αry.

This hand-operated unit/ ) F is equipped with a plurality of switches sW and -3Ws for call processing on the top surface. here,
Switches sw, -sw, each extension call, switch SW,
75 corresponds to answering the doorbell, switch SW corresponds to simultaneous calling, and switch SW corresponds to call processing on hold.
In some cases, another switch is provided for one king.

The internal circuit of this hand-operated unit F is shown in FIG. Sending means 20 and this signal sending means 20
a control circuit 21 including a CPU that controls the operation of the switches sw and -sw according to the operated switches sw and -sw; and the switch SW.

~Creating a power source for the control circuit 21 from the call current supplied to the telephone C via the extension 12 from the time of operation of SW6 to the end of sending out the pseudo call processing signal 1! This is done together with the source circuit 22. Specifically, the signal sending means 20 is inserted into the line connecting the telephone outlet B and the telephone W1C. A relay RY with a contact y, a transistor Q, ~Q that drives this relay R, and a resistor R, ~
The drive circuit 23 consists of a transistor QstQs and a resistor R□R9. By providing the IttIL circuit, the relay R,
It is designed to be driven at a constant current. The N source circuit 22 supplies a power supply vl of the control circuit 21 with a communication current supplied from a diode britsuno 26 and a guiode pulley/726 which depolarizes the communication current and supplies it to the signal sending means 20 and a circuit described later. Transistors Q, , Q that create D
, , Zenaguio VZD, diodes D, , D, , power supply generation section 2 consisting of capacitor C7 and resistors R1 to R1
4 and a starting circuit 25 consisting of a transistor Q I , a capacitor C6, and resistors R, , R2 that starts the power supply generation 1i24 when the switches SW to SW6 are pressed.
It is I or.

Now, this hand-operated unit) F switch SW.

When is pressed as shown in FIG. 2(a), transistor Q, which is off during normal operation, is turned on and the starting circuit 25 is activated. At this time, the starting circuit 25 passes through the diode D2 to the transistor Q3. Since the base current is supplied, transistor Q is turned on at this time, and thus transistor Q2 is turned on. This transistor Q2
When turned on, the capacitor C2 is charged with a running current through the diode britsuno 26 and the transistor Q2, and power is supplied to the control circuit 21. In other words, in this embodiment, the starting circuit 25 turns on the transistor Q to start the power generation section 24, and at this time, the power generation section 24 supplies the charge charged in the capacitor C2 as a power source to the control circuit 21. .

By the way, a parallel circuit consisting of a capacitor C1 and a high resistance value resistor R2 is connected between the base of the transistor Q of the starting circuit 25 and the switch SW, so that the transistor Q1 is turned on for a certain period of time. In other words, in this startup circuit 25, the moment the switch SW is turned on, the capacitor CI, the switch SW, and the pull-down resistor R
The total input current flows through 8 and transistor Q, transistor Q is turned on, and after that, due to charging of capacitor C1, the base current of transistor Q1 gradually decreases, as shown in #lt2 diagram (b). When the base current supplied to transistor Q decreases and capacitor C6 is sufficiently charged, transistor Q is turned off.

By the way, when the supply of base current from the startup circuit 25 to the transistor Q is stopped for a certain period of time, 'IIL' is maintained until the pseudo call processing signal is sent out.
It is necessary to maintain the supply of power VDD from the source S24 to the control circuit 21. Therefore, in the control circuit 21, when the power supply VDD is supplied, 1 is transferred from the source holding layer OI to the second
As shown in FIG. 2(e), a base current is supplied to the transistor Q3 via the diode D, and as shown in FIG. !124 operation status at- maintained.

Moreover, the control circuit 21 is electrically i11! When Vob is supplied, the input terminals I, ~1. The input signal state shown in FIG. 2(c) is detected to determine which switch SW, -SW, is pressed. In this case, since the switch SWl is pressed, it is a specific extension call, and the output of the output terminal 0□ controls the transistor Q of the signal sending means 20 on and off. Assuming that the call processing signal is dial ``13+I+'', transistor Q4 is turned on three times in succession. At this time, relay Ry is driven, so normally closed contact ``y'' turns on as shown in Figure 2 (f
) is opened three times, and a dialing signal corresponding to the dial "'3"" is transmitted to the telephone exchange fiA.

Here, 7 of telephone exchange A? As shown in FIG. 5, the DP detection circuit 2 is composed of a bidirectional 7t tocabra PC and resistors R2° and R21, and detects the dial signal and the telephone 1fiC from the intermittent communication current on the extension 12. 77 detection. When the switch SW1 of the hand-operated unit F is pressed as described above, the detection output shown in FIG. Execute the extension dialing operation.

Then, when the sending of the above-mentioned pseudo call processing signal is completed,
The control circuit 21 generates fi [creation unit 2
Figure 2 shows the supply of base current to the transistor Q of 4 (
e), the transistor Q2 is turned off, and the supply of the power supply vI, I to the control circuit 21 is stopped F. In other words, after the supply of power ■[)D to this control circuit 21 is stopped, the hand-operated unit )F is essentially disconnected from the extension 12, and as a result, there is no effect on telephone calls using the telephone C. Try not to let it affect you.

Although the above explanation has been given for the case where switch SW is pressed, a pseudo call processing signal is sent to telephone exchange A in the same manner when other switches SW2 to SW are pressed. *In the above case, the 77 King was not included in the call processing signal, but the 77 King is also sent to the telephone exchange fiA in the same way as a dial signal by interpolating the m contact "y". be able to.

By the way, while the hand-operated unit (F) is operating as described above, a current flows through the internal unit (ME). is the sum of the current of the X phone C (approximately af40-A) and the current of the control circuit 21 and power supply circuit 22 (several A by using a CM OS type CPU) when relay R is inoperative. , relay R, is in operation, the current in telephone C becomes zero and becomes equal to the sum of the currents in control circuit 21, power supply circuit 22, and signal sending means 20. Current I0 flowing through this extension 12
is shown in FIG. 2 ([1), where relay R,
By using a highly sensitive reed relay, a normally closed type optical semiconductor relay, etc., the current of the signal sending means 20 is several meters.
It becomes A. Therefore, the resistance Rh of the hook/DP detection circuit 2
If the value of o is adjusted to WI4 and the detection level is set to 20-A, the pseudo call processing signal can be detected accurately.

Specifically, 7*)*pu? Since the forward voltage of the light emitting diode of the PC is about 1V, if the resistance R2o is about 50Ω, the detection level will be 20A. Moreover, since the signal exit means 20 of this embodiment drives the relay RF with a constant current, it is possible to reduce the fluctuation of the current flowing through the extension line 12 when the relay RyLf')wA is excited, and the hook/DP detection circuit 2
can reliably detect pseudo call processing signals.

[Effect of the Invention 1] As described above, the present invention provides f! II The hand-operated unit is equipped with a power supply circuit that generates power for the control circuit and signal sending means from the call current supplied to the telephone via the extension until the transmission of the similar call processing signal is finished. 1
11m can be obtained from the communication current supplied to the telephone, and there is no need for a separate power supply for the handheld operating unit, and it is possible to wire the power line for the handheld operating unit or use a battery as the power source. never becomes large.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of a hand-operated unit according to an embodiment of the present invention, FIG. 2 is an explanatory diagram of the operation of the same, FIG. 3 is a perspective view showing the external appearance of the same, and FIG. 4 is a circuit diagram of a telephone exchange. FIG. 5 is a specific circuit diagram of the hook/DP detection circuit, and FIG. 6 is a system configuration diagram of the telephone exchange apparatus. A is a telephone exchange, C is a telephone, F is a hand control unit,
6 is an outside line, 1 is an extension line, 20 is a signal sending means, 21 is a control circuit, and 22 is a power supply circuit.

Claims (1)

[Claims] (1) A telephone exchange connected to an external line, which is a public telephone line, and multiple units connected to this telephone exchange by extension lines, which are capable of making external and internal calls by switching connections to external lines or other extensions using the telephone exchange. commercially available telephones, and a hand-operated unit that is connected in parallel with the telephones to the extension lines to which these telephones are connected, and sends to the telephone exchange a pseudo call processing signal identical to the call processing signal sent to the telephone exchange by the operation of the telephone. A telephone exchange device comprising: a plurality of switches provided for each of the above-mentioned call processing; and a signal sending means for disconnecting the telephone from the telephone exchange and sending the above-mentioned pseudo call processing signal to the telephone exchange. , a control circuit that controls the operation of this signal sending means in accordance with the operated switch, and a control circuit that controls the call current supplied to the telephone via the extension line from the time the switch is operated until the end of sending out the pseudo call processing signal. A telephone switching device in which the above-mentioned hand-operated unit is provided with a power supply circuit that generates a power supply for the telephone.