KR0124229Y1 - Recovery installation of separated receiver and transmitter - Google Patents

Abstract

The present invention relates to an automatic restoring device that enables communication when the handset is left unattended, and includes a line switching unit (10) for switching a connection between a trunk line and a telephone line and a connection between the trunk line and a ring signal receiving means (60); A constant voltage circuit unit 20 connected to the telephone line to keep the output voltage constant even when the incoming power supply voltage is changed; The signal conversion unit 30 is connected to the telephone line and blocks the direct connection with the telephone line, and removes and outputs a direct current (DC) component of the signal applied to the telephone line through the induction action. ; A frequency detection unit (40) connected to the signal conversion unit (30), for detecting a handset neglect sound transmitted from the exchange through the trunk line; A switching driver (50) connected between the frequency detecting unit (40) output terminal and the line switching unit (10) and driving the line switching unit (10) by using the resultant output signal of the frequency detecting unit (40); The ring signal receiving unit 50 connected to the line switching unit 10 to receive a ring signal; And a reset unit 60 for restoring the communication path by resetting the switching operation of the line switching unit 10, and automatically operating when the handset is left unattended (SOH) without using a separate power supply. It eliminates the need for retrofitting existing phone circuits and allows simple retrofitting inside or outside the phone.

Description

Automatic restoring device to make a call possible when leaving the handset

1 and 2 are schematic diagrams for explaining the prior art.

Figure 3 is a block diagram schematically showing the configuration of an embodiment of an automatic restoration device according to the present invention.

Figure 4 is a detailed circuit diagram showing an embodiment configuration of an automatic restoration device according to the present invention.

* Explanation of symbols for main parts of the drawings

10: line switching unit 20: constant voltage circuit unit

30: signal converter 40: frequency detector

50: switching drive unit 60: ring signal receiving unit

70: reset unit 80: operation display unit

90: overvoltage protection part R1-R16, VR1, VR2: resistance

C1-C20: Capacitor K1: Relay Switch

D1, D2 ZD1: Diode BD1, BD2: Bridge Diode

LD1: Lamp SW1: Push Button Switch

T1: transformer Q1: transistor

SP1: Speaker

K1-1a, K1-1b, K1-1c, K1-2a, K1-2b, K1-2c: relay contacts

The present invention, even when the handset is left in a state in which the handset is separated from the telephone body due to various factors such as a mistake of a telephone user or a child's mischief, the handset is left unattended to receive an incoming call again. The present invention relates to an automatic restoring device for making a telephone call.

In general, when a conventional telephone is left unattended by a user's mistake, the caller who is calling from the outside is notified of only the busy tone from the switching center, so that they cannot talk. In addition, the system occupied the line unnecessarily, significantly lowering the line usage efficiency and call success rate, and also causing many problems such as unnecessary time for testing and operating the line due to the caller's report. .

On the other hand, as part of efforts to improve the problems of the existing conventional telephone, Utility Model Registration No. 12819 (Notification No. 93-3233) in 1990 and Utility Model Registration No. 3388 (Notification No. 91) in 1991 -2280) proposed an improvement.

When the contents are briefly described with reference to FIGS. 1 and 2 of the accompanying drawings, they present a telephone reception holding circuit when the handset is left unattended, but in this case, all of them are operated using an internal power supply (DCV6) supplied separately from the telephone itself. It is also configured to operate by the current blocking command from the exchange facility which is applied for a certain time (4-5 seconds) after the call is completed (exactly 6-7 seconds).

However, in this case, first, since it is operated by the current interrupt command generated from the exchange when the handset is left unattended, it cannot be used in the new all-electronic exchanger or the like which does not issue the current interruption command. In general, the new electronic switching device does not generate a current interruption command when the handset is left, but generates a handset sound (R.O.H). Second, since a separate power supply must be used, frequent battery replacement is required due to current consumption due to relay operation when the battery is used, and when connected to an 110 / 220V AC power source through an adapter, etc. The power (AC) line should be installed to where the phone is. Third, there is provided a separate switch and the like interlocking with the telephone hook switch, there is a problem that can be applied only by modifying the internal circuit of the existing telephone.

Therefore, the present invention is designed to completely eliminate the above-mentioned conventional problems, and operates automatically when the handset is left unattended (S.0.H) without using a separate power supply. It is an object of the present invention to provide an automatic restoring device which enables a call when the handset is left unattended, which requires no retrofitting of the circuit and can be easily installed inside or outside the telephone.

The present invention to achieve the above object,

Line switching means for switching a connection between a trunk line (TIP LINE, RING LINE) and a telephone line and a connection between the trunk line and a ring signal receiving means; Constant voltage means connected to said telephone line connected to said line switching means, said constant voltage means for maintaining a constant voltage even if the incoming power supply voltage changes; A signal conversion means connected to the telephone line and disconnecting a direct connection with the telephone line and removing and outputting a direct current (DC) component of a signal applied to the telephone line through an induction action; Frequency detecting means, connected to said signal converting means, for detecting a handset neglect sound transmitted from an exchange through said trunk line; Switching driving means connected between the frequency detecting means output stage and the line switching means, and for driving the line switching means using the resultant output signal of the frequency detecting means; The ring signal receiving means connected to the trunk line to receive a ring signal by a switching operation of the line switching means; And reset means for restoring the communication path by resetting the switching operation of the line switching means.

In addition, in order to achieve the above object, the present invention,

Line switching means for switching a connection between a trunk line (TIP LINE, RING LINE) and a telephone line and a connection between the trunk line and a ring signal receiving means; Constant voltage means connected to said telephone line connected to said line switching means, said constant voltage means for maintaining a constant voltage even if the incoming power supply voltage changes; A signal conversion means connected to the telephone line and disconnecting a direct connection with the telephone line and removing and outputting a direct current (DC) component of a signal applied to the telephone line through an induction action; Frequency detecting means, connected to said signal converting means, for detecting a handset neglect sound transmitted from an exchange through said trunk line; Switching driving means connected between the frequency detecting means output stage and the line switching means, and for driving the line switching means using the resultant output signal of the frequency detecting means; The ring signal receiving means connected to the trunk line to receive a ring signal by a switching operation of the line switching means; Reset means for restoring a communication path by resetting a switching operation of said line switching means; And it is connected to the reset means 10, and provides an automatic restoring device that enables the call when leaving the handset including a means for displaying the operation (70).

In addition, in order to achieve the above object, the present invention,

Line switching means for switching a connection between a telephone station side trunk line (TIP LINE, RING LINE) and a subscriber side telephone incoming line, and a connection between the trunk line and a ring signal receiving means; Constant voltage means connected to said subscriber-side telephone incoming line connected to said line switching means, so that the output voltage remains constant even if the incoming power supply voltage is varied; Signal conversion means connected to the telephone line and removing and outputting a direct current (DC) component of a signal applied to the subscriber telephone line; Frequency detecting means connected to said signal converting means for detecting a handset neglected sound (S.0.H) transmitted from an exchange through said trunk line; Switching driving means connected between the frequency detecting means output stage and the line switching means, and for driving the line switching means using the resultant output signal of the frequency detecting means; The ring signal receiving means connected to the trunk line to receive a ring signal by a switching operation of the line switching means; Reset means for restoring a communication path by resetting a switching operation of said line switching means; A means connected to said reset means and indicating whether to operate; And a protection means connected in parallel with a TIP LINE and a RING LINE of the trunk line of the telephone station, to keep the OPEN state normally, and to conduct the electric shock when the impact voltage is introduced by a lightning strike. It further provides an automatic restoration device that enables communication when the handset is left unattended.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings of FIGS. 3 and 4.

Even when the receiver is left unattended (S.O.H), one embodiment of the present invention to restore the call can be configured as shown in the block diagram of FIG.

In the drawing, 10 is a line switching unit, 20 is a constant voltage circuit unit, 30 is a signal conversion unit, 40 is a frequency detector, 50 is a switching driver, 60 is a ring signal receiver, 70 is a reset unit, and 80 is an operation display unit.

As shown in the figure, the automatic restoring device that enables the call when the handset is left out according to the present invention, which is connected to a tip line (TIP LINE) and a ring line (RING LINE) of a known telephone circuit front end connected to a CO line, The internal configuration is as follows.

Line switching unit 10 is composed of a relay switch and the like connected to the tip line (TIP LINE) and the ring line (RING LINE) of the telephone line trunk line, respectively, the telephone line trunk line is a known telephone circuit or ring of the restoration device It is switched to be connected to the signal receiver 60.

Then, the constant voltage circuit unit 20 and the signal converter 30 are respectively connected to the rear end of the line switching unit 10. The constant voltage circuit unit 20 is applied to the internal circuit of the apparatus even if the incoming power supply voltage is changed. Ensure that the voltage maintains the proper supply voltage.

The signal converter 30 cuts the direct connection between the apparatus and the telephone line, and outputs the frequency signal from which the DC component is removed to the frequency detector 40 at the rear end through an induction action.

The frequency converter 40 is connected to the rear end of the signal converter 30 so that the handset neglected sound transmitted from the exchange is detected.

A switching driver 50 is provided between the output end of the frequency detector 40 and the line switch 10 so as to synthesize the resultant output signal of the frequency detector 40 to drive the line switch 10.

A ring signal receiving unit 50 for receiving a ring signal and generating a ringing sound is connected to the rear end of the line switching unit 10.

In addition, when the subscriber recognizes the ring signal and wants to answer the call, the subscriber switches the reset unit 60 to the line switch unit 10 to reset the switching operation of the line switch unit 10 to restore the call path. Also, make telephone calls possible when the handset is left unattended.

On the other hand, by additionally connecting the operation display unit 70 for displaying the operation status of the device to the reset unit 70, it is possible to improve the operation reliability and convenience of use.

In addition, it is connected to the TIP LINE and the RING LINE of the trunk line of the telephone line in parallel, and the overvoltage protection is conducted when the shock voltage is introduced by the lightning strike while maintaining the OPEN state normally. By additionally configuring the unit 90, it is possible to eliminate the risk of malfunction and damage due to lightning or the like.

Now, a specific embodiment configuration and operation will be described with reference to FIG.

The LINE side in the illustrated circuit diagram is connected to a trunk line connected to a telephone station, and the TEL side is connected to a telephone, respectively.

As illustrated in the figure, the line switching unit 10 has a relay switch (K1) for switching the connection path between the tip line and the ring line, respectively, a hook switch (HOOK SWITCH) of the phone after a call or after completion of the call When the handset is normally placed so that OPEN is opened, the relay switch (K1) contact K1-1c is in contact with K1-1b, and K1-2c is shorted to K1-2b so that the trunk line telephone line is connected to the telephone circuit. If the handset is incorrectly placed and the signing sound is transmitted from the telephone exchange to the subscriber, the relay switch K1 is driven so that the contact K1-1c is shorted to K1-1a. By allowing 2c to be short-circuited with K1-2a, the trunk line telephone line is connected to the ring signal receiver 5 of the present invention device.

The constant voltage circuit unit 20 includes a bridge diode BD2 connected to a trunk line, a capacitor C9 and a resistor R8 connected to the bridge diode BD2, a capacitor C10 and a zener diode ZD1 connected to the resistor. The voltage supplied to the internal circuit of the apparatus does not change even if there is a change in the power supply input voltage applied through the trunk line.

The signal converter 30 may include a resistor (R11) and a capacitor (C4) connected in series with the tip line, and a transformer (T1) having a primary side connected between the capacitor (C4) and the ring line. R11) and the condenser C4 perform a protection function to attenuate the signal having a high level in order to protect the restoration device of the present invention when the ring signal is input, and the transformer T1 is connected between the device and the telephone line. It cuts the direct connection, removes the DC component of the input signal applied to the primary side, and outputs the frequency signal through the secondary side.

The frequency detector 40 has an input terminal connected to the secondary side of the transformer T1 of the signal converter 30 and has a frequency detection IC for detecting a specific frequency by setting a parameter of the peripheral circuit. For example, two frequency detection ICs U3 and U4 are connected in parallel on the secondary side of the transformer T1 to detect two different frequency values together, and the circuit is appropriately configured according to the number of frequencies to be detected. can do.

The switching driver 50 includes an AND gate U2 having an input terminal connected to an output terminal of the frequency detection ICs U3 and U4 of the frequency detector 40 and a bias circuit R7 and R4 connected to an output terminal of the AND gate U2, respectively. , C3) and a transistor Q1 having a base end connected to the bias circuit and a collector end connected to a relay switch K1 driving end of the line switching unit 10, wherein the biased voltage is 'high'. Only when it is in a high state, it is turned on to drive the relay switch K1.

The ring signal receiving unit 60 includes a known ring signal detecting IC U1 and its peripheral circuits, each of which has an input terminal connected to the contacts K1-1a and K1-2a of the relay switch K1, wherein the relay switch ( When a ring signal is applied through the contacts K1-1c and K1-1a of K1) and K1-2c and K1-2a, a bell signal is output through the speaker SP1.

The reset unit 70 includes a resistor R6 and a bridge diode BD1 connected to the relay contacts K1-1a and K1-2a of the line switching unit 10, and a push connected between the bridge diode BD1 and the relay. The button switch SW1 and the condenser C1 are provided, and when the user of the device of the present invention intends to make a call with the called subscriber, the push button switch SW1 is pressed. And as the voltage charged in the capacitor C1 through the bridge diode BD1 is discharged through the push button switch SW1, the relay switch K1 is reset to switch the line to be connected to the telephone circuit.

The operation display unit 80 may include a resistor R1 connected to the bridge diode BD1 of the reset unit 70 and a lamp LD1 connected in series with the resistor R1, which is the reset unit 70. The operation display lamp is turned on using the line voltage (-48V) applied through the bridge diode BD1.

The overvoltage protection unit 90 connects an arrester in parallel to the TIP LINE and the RING LINE of the trunk line of the telephone line. When the voltage is drawn in, it is turned on to block over voltage inflow.

In particular, the automatic restoring device that enables the call when the handset is left unattended according to the present invention is configured independently of the telephone circuit, so that the telephone can be easily installed by being built-in or external.

Therefore, the device of the present invention does not operate because the power supply is interrupted like a telephone when the handset is normally lowered. However, once the handset is lifted, power is supplied, and the power is continuously supplied until the handset is put down normally or the apparatus is operated due to a hearing loss.

When the subscriber rings by ringing the telephone, the call current is communicated with the other subscriber through the contact point of the relay switch K1. If the handset is normally placed on the telephone after the call with the other subscriber is completed, the restoration apparatus does not operate.

During a phone call, a voice signal is input to the signal conversion unit 30. At this time, the frequency detection ICs U3 and U4 of the frequency detection unit 40 do not have a corresponding frequency and thus cannot detect the set frequency and thus the frequency detection IC. The output pins (U3, U4) will be in a LOW state. Therefore, the AND gate U2 of the switching driver 50 is also in the 'low' state, and the voltage biased by the bias circuits R7, R4, and C3 in the subsequent stage is also 'low', so that the transistor Q1 Does not turn ON, so the relay switch K1 is also not driven.

Then, when the handset is put down normally, the telephone is open and the hook switch is opened, and power is not supplied to the restoring apparatus so that the telephone does not operate.

However, if the subscriber incorrectly puts the handset on for some reason, the telephone station's exchange will send out a sign language neglect sound to the subscriber.

That is, the sign language neglected sound input through the signal converter 30 (R11, C4, T1) causes the frequency detection IC (U3, U4) output pin of the frequency detector 40 to be 'HIGH'. The contact gate of the relay switch K1 is driven by turning on the transistor Q1 so that the output of the AND gate U2 of the switching driver 50 is also 'HIGH'. K1-1c is shorted to K1-1a and K1-2c is shorted to K1-2a to enable the ring signal receiving unit 5 to receive a ring signal, and the contact point of the relay switch K1. K1-2c and K1-2b are opened and the emergency supply is interrupted in the constant voltage circuit unit 20, so that power supply through the power supply is stopped.

At this time, a lamp (LAMP: LD1) of the operation display unit 80 is turned on to indicate that the present restoration device is operating. The line voltage (-48V) input through the bridge diode BD1 of the reset unit 70 is turned on. To turn on the lamp of the operation display unit (80).

In this state, when any other subscriber makes a call, the ring signal is received through the contact signals K1-1c and K1-1a and K1-2c and K1-2a of the relay switch K1. BELL sounds through the speaker.

Thus, the user who has recognized that the call has been made, the user pushes the push button switch (SW1) in order to talk to the other subscriber, the resistance (R6) and the bridge diode (BD1) of the reset unit 70 at this time As the voltage charged in the condenser C1 is discharged through the push button switch SW1, the relay switch K1 is again connected between the contacts K1-1c and K1-1b and between K1-2c and K1-2b. It is possible to make a call only by short-circuiting each so that the trunk line can be connected to the telephone.

And again, even if you put the handset wrong, repeat the operation as mentioned above to always be able to receive a call.

Therefore, the automatic restoring device for making a phone call when leaving the handset according to the present invention constructed and operated as described above has the following effects as compared with the prior art.

First, since it is configured independently of the telephone circuit, it can be easily installed by making the phone internal or external, so that it can be easily applied to any phone already in use.

Second, because it is operated by using the power supply, there is no need for a separate power supply, so it is not necessary to replace the battery and install the power supply by the subscriber.

Third, when the handset is left to operate by the handset left sound (S.O.H) generated from all exchanges, it can be applied to both old and new various exchange facility environment.

Fourth, even if an overvoltage flows into a trunk line due to a lightning strike or the like, a malfunction and damage are prevented by blocking the inflow to the device circuit and the subscriber telephone.

Fifth, since there is no telephone failure report due to neglect of the handset, it eliminates unnecessary line tests, thereby effectively improving the work efficiency of the corresponding personnel, and enhancing the efficiency of the line usage and convenience of callers.

Claims (7)

An automatic restoring apparatus in which a ring signal is received again to allow a call even when the handset is left unattended, the apparatus comprising: a connection between a telephone line (TIP LINE, RING LINE) and a subscriber telephone line, and the trunk line and a ring signal receiving means ( Circuit switching means (10) for switching the connection between the two; Constant voltage means (20) connected to the subscriber line telephone inlet line connected to the line switching means (10), so that the output voltage is kept constant even if the incoming power supply voltage is changed; A signal conversion means (30) connected to the telephone line and removing and outputting a direct current (DC) component of a signal applied to the subscriber line telephone line; A frequency detecting means (40) connected to the signal converting means (30), for detecting a handset neglected sound (S.O.H) transmitted from an exchange through the trunk line; The frequency detecting means 40 is connected between the output switching means of the line switching means 10 and switching driving means 50 for driving the line switching means 10 by using the resultant output signal of the frequency detecting means 40. ); The ring signal receiving means (50) connected to the trunk line to receive a ring signal by a switching operation of the line switching means (10); And a reset means (60) for restoring the communication path by resetting the switching operation of the line switching means (10). The automatic restoring apparatus according to claim 1, further comprising means (70) connected to said reset means (10) and indicating whether to operate. The method according to claim 1, wherein the telephone line is connected in parallel to a tip line and a ring line of the trunk line, and is normally kept open, and is energized when a shock voltage is introduced due to a lightning strike. Automatic restoring device that enables the call when leaving the handset, characterized in that it further comprises a protection means for blocking (90). The internal circuit protection level attenuation means according to any one of claims 1 to 3, wherein said signal conversion means (30) is connected to a tip line of said subscriber-side telephone incoming line and attenuates a signal having a high applied signal level. R11, C4); And a primary side thereof is connected between the level attenuation means and a ring line of the subscriber telephone inlet line, and a secondary side thereof is connected to the frequency detecting means 40, and a DC component of an input signal applied to the primary side. And a transformer (T1) for outputting a frequency signal through the secondary side after the removal. 4. The frequency detecting means (40) according to any one of claims 1 to 3, wherein the frequency detecting means (40) has its input terminal connected to the secondary side of the transformer (T1) of the signal converting means (30), and the parameter setting of each peripheral circuit. And a plurality of frequency detection ICs for detecting different specific frequencies by means of an automatic restoring device for leaving the handset unattended. The telephone line of claim 3, wherein the protection means (90) includes an arrester connected in parallel to a tip line (TIP LINE) and a ring line (RING line) of the telephone line at the telephone line. Automatic restoration device to enable. The automatic restoring apparatus according to any one of claims 1 to 3, wherein the automatic restoring apparatus is configured independently of the existing telephone circuit, and is manufactured and installed in the exterior of the existing telephone. Restoration device.