KR100322418B1 - A Network Failure Restoring Apparatus - Google Patents

Abstract

The present invention provides a call recovery device between a telephone terminal introduced into a home or a workplace indoors and a telephone connected to the terminal, whereby the handset is separated from the main body of the telephone by a user mistake or various factors. -Hook) enables the reception and transmission of ring signals, which are ringtones, even when left unchecked, which eliminates communication disturbances due to line occupation that may occur when the handset is left unattended, prevents troubles in the electronic switchboard, In addition to easy information transfer, it provides a call recovery device when the handset is left, which can improve the reliability of the telephone.

Description

A device for failing over a call when leaving the handset {A Network Failure Restoring Apparatus}

The present invention relates to a call path failure recovery device when the handset is left unattended, and more particularly, to a call failure recovery device between a telephone terminal introduced into a room at home or at work and a phone connected to the terminal (Network Failure Restoring Apparatus). (Hereinafter referred to as 'NFRA'), when the handset is left out of the main body of the phone due to a user's mistake or various factors, it is possible to receive and receive ring signals as ringtones and to receive and transmit the call. Handset that eliminates communication disturbances due to line occupation, prevents troubles in electronic switchboards, facilitates emergency caller information transfer, improves phone reliability, and maximizes productive efficiency. It relates to a failure recovery apparatus during the call.

Commonly used telephones are not able to receive call signals of incoming calls as well as not be able to send and receive calls from other parties when the handset is left out of the telephone body due to a user's mistake or mischief of a child. In addition, the line parking phenomenon caused by neglecting the handset in the telephone exchange facility causes other phone calls to be disturbed, which causes the failure of the electronic exchange facility, and also occupies the line, causing inconvenience to other telephone users. there is a problem.

In addition, the present applicant filed with the Republic of Korea Utility Model Application No. 90-12819 (1990.8.24) to solve the above problems and the Utility Model Publication No. 93-3233 (1993.6.3) and the Republic of Korea Utility Model Application No. 91- Utility Model Publication No. 94-2280 (1994.4.13), filed under No. 3388 (1991.3.14), which is installed inside the main body of the phone, which is complicated to install and replaces the entire phone currently used in installation. There are problems to be done, inconveniences that the user must disassemble the phone main body in order to troubleshoot when an abnormality such as a failure occurs, and cause problems of other parts due to the disassembly of the main body. There is always a problem that the productivity efficiency of the product is lowered.

Accordingly, an object of the present invention is to provide a recovery device for a call between a telephone terminal connected to a home or workplace indoors and a telephone connected to a heretic terminal, whereby the handset is separated from the main body of the telephone by a user mistake or various factors. Even if left unattended, it is possible to receive a ring signal, which is a ring tone, as well as to allow transmission and reception of a call recovery device when the handset is left unattended to facilitate information transmission of an emergency caller.

In addition, another object of the present invention by adding a polarity inversion circuit inside the call path failure recovery device, by configuring a closed loop between the call path failure recovery device and the internal circuit of the telephone through the polarity reverse circuit when the howling occurs, call path failure recovery system In addition to maintaining the call to the call when the call is left without a separate switch other than the selection of the hook switch to provide a call recovery device when the call is left unattended.

1 is a view showing an installation example of a call path failure recovery apparatus according to the present invention,

Figure 2 is a block diagram showing a call path failure recovery apparatus according to the present invention,

3 is a diagram showing the detailed circuit of FIG. 2 according to an embodiment of the present invention.

10: call recovery device 20: telephone terminal

30: telephone 30a: handset

110: howling detector 120: dual timer

130: holding circuit portion 140: polarity inversion circuit portion

150: ring signal generator 160: power circuit

The technical means of the present invention for achieving the above object is a howling detection unit for detecting a howling signal transmitted from an electronic exchange when the handset is left in a state in which the telephone, and a howling detection signal is provided from the howling detection unit. A timer for outputting a switching start signal, a holding circuit unit for driving a relay according to the signal output from the timer to interrupt a normal communication path and continuously supplying operating power to the relay, and for interrupting the call circuit of the holding circuit unit. An off-hook call capable device having a ring signal generator for receiving a ring signal transmitted from a telephone exchange and generating a ring signal even when the handset is left unconnected according to the plurality of incoming lines (L1, L2). Is installed in the relay output from the holding circuit portion when detecting howling The switch is switched according to the signal to invert the polarity of the telephone line to form the holding circuit portion and the telephone circuit as a closed loop, and to apply DC power to the inside of the telephone through the polarity inverted switch to maintain the on-hook of the telephone. It is characterized in that the loop is further opened, the polarity inverting circuit unit 140, which enables the call by repositioning the polarity of the telephone line. Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 is a view showing an installation of the call path failure recovery apparatus according to the present invention, the call path failure recovery apparatus (NFRA) 10 according to the present invention is a telephone terminal installed in the room or the wall from the external incoming line (L1, L2) It is provided between the 20 and the telephone 30.

2 and 3 are block diagrams and detailed circuit diagrams of a failure recovery apparatus according to an embodiment of the present invention, howling detection unit 110, dual timer 120, holding circuit unit 130, polarity inversion The ringer 140, the ring signal generation unit 150 and the power circuit unit 160. The howling detector 110 (Howling) is left in the state in which the handset 30a is separated from the telephone 30, The electronic exchanger that senses this outputs an idle signal and detects a high frequency of the idle signal, and the Newel timer 120 receives a howling detection signal from the howling detector 110 and receives a predetermined switching start signal. It consists of two timers to output the trigger signal (trigger), the holding circuit unit 130 to drive the relay by the signal output from the dual timer 120 to cut off the usual call path At the same time, it is configured to continuously supply the operating power to the relay, the Far East reversing circuit unit 140, the power source of the telephone 30 by the relay drive signal of the holding circuit unit 130 is the lead wire (L1) to the second lead wire (L2) It is configured to switch the polarity of the incoming line so as to be applied to, the ring signal generation unit 150 is interconnected with the incoming lines (L1, L2) according to the interruption of the communication circuit of the holding circuit unit 130 when the handset (30a) when left In addition, the user receives the bell signal transmitted from the telephone exchange to generate a ring signal so that the user can hear the telephone ring coming from the telephone exchange, and the power circuit unit 160 uses a DC 6V power source to supply power to the circuits. It is made to generate and supply to DC 5V power supply through constant voltage IC (U5).

On the other hand, the howling detection unit 110, as shown in Fig. 3, the primary side of the transformer T is connected to the first lead wire (L1) and the second lead wire (L2), the second lead wire (L2) and the transformer A resistor R1 having attenuator function and a capacitor C1 are connected between the primary side of the T, and a control variable resistor VR is connected to the secondary side of the transformer T. The variable resistor VR Is connected to the input pin 3 of the first low power decoder U1 and the input pin 3 of the second low power decoder U2, respectively, and the output pin 8 of the first low power decoder U1 is the first pin. An output terminal pin 8 of the second low power decoder U2 is connected to an input terminal of the second OR gate OR2, and an output terminal of the logical OR gates OR1 and OR2. Are respectively connected to the base of the first transistor Q1, and the pins 4 of the low power decoders U1 and U2 are connected to the emitter of the first transistor Q1. There The howling detection unit 110 is composed so as to detect the top of 2,450Hz and 2,600Hz than other frequencies that are used for dialing the telephone system to the appropriate spacing of the tones.

The dual timer 120 has a pin 2 of the first timer U3, which is a linear IC, connected to the collector of the first transistor Q1, and a pin 5 and a pin of the first timer U3. A resistor R2 and a diode D1 are connected in parallel between the terminals 6, and the pin 5 of the first timer U3 is connected to the pin 8 of the second timer U4, which is a linear IC. .

In the sustain circuit unit 130, the pin 9 of the second timer U4 is connected to the base of the second transistor Q2, and the first relay Rly1 is connected to the collector of the second transistor Q2. The diode D2 is connected between the input and output terminals of the first relay Rly1, and a relay contact Ry-1 driven by the first relay Rly1 is provided, and the relay contact Ry− is provided. A resistor R3 is connected to 1, a base of the third transistor Q3 is connected between the resistor R3 and R4, and a second relay Rly2 is connected to the collector of the third transistor Q3. ) And a third relay Rly3 are connected in series, and a reverse current prevention diode D3 is connected between the input side of the second relay Rly2 and the output side of the third relay Rly3, and the resistor R4 At one end, a relay contact Ry-3 driven by the third relay Rly3 is connected.

Looking at the operation of the present invention made of the above configuration as follows.

First, in a normal call, when the user of the telephone 30 picks up the handset 30a in order to talk with a desired counterpart, the contact point of the hook switch is connected (off-hook) and the user makes a call with the counterpart.

In more detail, when the user who wants to make a call picks up the handset 30a of the telephone 30, the hook switch is in an off-hook state in an on-hook state. Since the relay contact Ry3a on the first incoming line L1 remains in a connected state, a call is made with a counterpart who receives a dial tone sent from the electronic exchange.

In addition, when a call is made to make a call from the outside, in normal phone operating state, the user can make a call with the handset 30a of the phone 30 as it is. At this time, even when talking with the other party with the handset 30a, the electronic exchange does not send the handset neglect signal, so that the relay contact Ry3a on the first incoming line L1 can keep the connection and continue the normal call. will be.

On the other hand, after the user who wants to use the phone to lift the handset (30a) to complete the call to place the handset (30a) in place, but will be described incorrectly when left.

The electronic exchange detects that the handset 30a has been left and transmits the handset leaving signal. At this time, the handset neglected tone transmitted for 20 seconds is 1400Hz + 2060Hz + 2450Hz + 2600Hz with 4 combined frequencies, 2450Hz which is higher than other beep frequency used for maintaining proper intervals and dialing in telephone system. Detect +2600 Hz.

The howling detector 110 receives a first low power through a resistor R1 and a capacitor C1 having an attenuator function after receiving the adjustment of the control variable resistor VR through a transformer T when the handset neglecting signal is input. The input terminal pin 3 of the decoder U1 and the input terminal pin 3 of the second low power decoder U2 are respectively input.

In this case, when the beep frequency is 2450 Hz, it is input to the input pin 3 of the first low power decoder U1. When the beep frequency is 2600 Hz, it is input to the input end pin 3 of the second low power decoder U2. The output voltage of the output terminal pin 8 of the first low power decoder U1 and the output terminal pin 8 of the second low power decoder U2 outputs a logic 'low' signal of 0V.

Accordingly, the output of the first low power decoder U1 and the second low power decoder U2 of the howling detector 110 maintains a 'high (DC 5V)' state when no signal tone is detected, and the detected tone When present, it provides a logic output signal that remains low (DC 0V).

The low signal outputs of the low power decoders U1 and U2 are respectively input to an input terminal of the first OR gate OR1 and an input terminal of the second OR gate OR2. The logical OR gates OR1 and OR2 are 'high' inputs when there is no beep and a 'high' signal when there is a beep, and 'low' inputs when there is a beep. At this time, the first transistor Q1 is driven according to the output of the logic OR gates OR1 and OR2. When the logic OR gates OR1 and OR2 output a 'high' signal, the first transistor Q1 is driven. When the logic is turned off and the logic OR gates OR1 and OR2 output a 'low' signal, the first transistor Q1 is turned to a turn-on state.

The first timer U3, which is a linear IC of the dual timer 120, is triggered by the turn-on of the first transistor Q1 to output a 'high' signal, thereby outputting the timer U4, which is a linear IC. Outputs a 'high' signal. By the 'high' output of the second timer U4, the second transistor Q2 of the sustain circuit unit 130 is turned on to operate the first relay Rly1, and the diode D2 is As the relay Rly1 operates, the DC 5V power supplied to the circuit operates the relay Ry-3 by the instantaneous connection of the relay contact Ry-1. Simultaneously with the operation of (Ry-3), the relay Ry1 operating by receiving the howling signal frequency is stopped after 20 seconds of operation.

However, even when the relay Rly1 stops operation, the third relay Rly3 receives DC 6V and continues to operate with the connection of the relay contact Ry-3, so that the relay switch on the first lead line L1 It is disconnected from the connected state (from contact Ry3a to contact Ry3b) to cut off the communication circuit and connect to the ring signal generator 150 at the same time. The relay contact Ry3a is disconnected from the connection Ry3b so that the telephone call circuit caused by the handset 30a is blocked, thereby maintaining a normal telephone state, thereby receiving a call from the outside. As a result, the electronic exchange also does not bear the burden of neglecting the handset.

In addition, when a call is made to make a call from the outside of the telephone subscriber's neglected telephone subscriber, a signal ring of the telephone rings a normal telephone ring, and the user picks up the handset and briefly presses and releases the hook switch to make a call. This causes the third transistor Q3 to turn off because the DC 6V power supplied through the relay contact Ry-3 is cut off by pressing and releasing the hook switch, thereby causing the third relay Rly3 to stop operation. The relay contact, which is a cutoff contact via the call of the third relay Rly3, is returned from the disconnected state to the connected state (Ry3a? Ry3a).

Therefore, the holding circuit unit 130 does not operate unless the howling detection unit 110 does not operate.

The inverting circuit unit 140 connects the open contact of the relay contact Ry-1 by the operation of the first relay Rly1 to supply DC 5V (VCC) through the resistor R3 of the holding circuit unit 130. The three transistors Q3 are operated. By the operation of the third transistor Q3, the relays Rly2 and Rly3 operate by receiving an input power supply DC 6V. The relay contacts Ry2c and Ry2b of the second relay Rly2 in charge of inversion are connected to the relay contacts Ry2a and Ry2d so that the DC 6V connected to the second lead wire L2 is connected according to a circuit operation course. The contact Ry2c is a relay contact Ry2a, and the relay contact Ry2b is inverted to a relay contact Ry2d so that power is switched from the first lead line L1 to the second lead line L2 and applied.

As the applied DC 6V power is applied to the third relay Rly3 to turn on the relay contact Ry-3, the DC power supply Vcc passes through the resistor R3 and then the third transistor Q3. By operating the relays Rly2 and Rly3. In order to maintain the operation of the relays Rly2 and Rly3, the third transistor Q3 supplied with DC 5V by the operation of the first relay Rly1 operates the relays Rly2 and Rly3 in advance to relay contact. By continuously connecting Ry-3, the DC 6V through the polarity inversion circuit unit 140 supports the sustain circuit unit 130 to continue to operate.

At this time, when the telephone user puts the handset 30a on the hook switch (On-Hook), the DC 6V power that is continuously supplied through the holding circuit unit 130 stops the supply and at the same time maintains the holding circuit unit 130 and the polarity reversal. The circuit unit 140 also stops the operation and returns to the normal communication circuit operation.

The ordinary ring signal generation unit 150 has a second lead line L2 when the relay contact Ry3a of the holding circuit unit 130 is changed to the relay contact Ry3b by the operation of the third relay Rly3. At the same time, the relay contact Ry3b is connected to the ring so that the incoming call can be received even when the handset 30a is left unattended. When left in the off-hook (Off-Hook) state, the holding circuit unit 130 blocks the loop and connects to the auxiliary bell, so you can hear the incoming call ringing and make a phone call.

After the completion of the telephone call, when the handset cannot be placed on the hook switch of the telephone or left unattended, the howling detection unit 110 operates by the handset neglected signal transmitted from the electronic exchange, and the holding circuit unit ( At the same time as the third relay Rly3 of 130 is operated, the relay contact Ry3a is disconnected to cut off the telephone loop to perform the normal task of the telephone.

In the technical process as described above, normal telephone operation is performed even when the handset is left unattended.

Finally, it is clear that all of the devices configured to detect one of the four frequencies, which are the handset neglected tones, or to detect three to four are all within the scope of the claims of the present invention.

Therefore, in the present invention, by installing a failure recovery device (NFRA) between the telephone terminal and the telephone connected to the home or workplace indoors, the handset is connected to the main body of the telephone by user's mistake or various factors. Even when left in the on-hook state, it is possible to receive and receive ring signals, which are ringing tones, and to solve the communication disturbances caused by line occupation that may occur when the handset is left. It has the effect of preventing a factor, and facilitates the information transmission of emergency callers. Also, by adding a polarity inversion circuit inside the call recovery device, there is no need to select a switch other than the hook switch when the auxiliary bell rings. It is possible to make a call immediately and improve the convenience of use and the reliability of the phone.

Claims (5)

A howling detector for detecting a howling signal transmitted from the electronic exchange when the handset is left in the telephone, and a timer for receiving a howling detection signal from the howling detection unit and outputting a predetermined switching start signal; The relay circuit is driven by a signal signal to cut off the normal communication path and at the same time, the maintenance circuit unit continuously supplies the operating power to the relay, and is connected to the incoming line according to the interruption of the communication circuit of the maintenance circuit unit. An off or callable device having a ring signal generator for receiving a ring tone transmitted from a to generate a ring signal: Installed on the plurality of lead lines (L1, L2) and switched according to a relay control signal output from the holding circuit portion when detecting howling, thereby inverting the polarity of the telephone line to form the holding circuit portion and the telephone circuit as a closed loop; In addition, it is further provided with a polarity inversion circuit unit 140 for applying a DC power to the inside of the phone through the polarity inverted switch to open the loop with the holding circuit unit when the on-hook of the phone is in place to enable the call by repositioning the polarity of the telephone line. Disaster recovery device, characterized in that when the handset is left unattended. delete delete delete delete