KR100363224B1 - A Telephone Including Function of Surveying Receiver's Hookoff - Google Patents

Abstract

According to the present invention, even if the dialed caller does not make a call connection with the receiver, the telephone is kept in the hook-off state for a certain period of time even when the handset is put down. A telephone having a receiver hookoff monitoring function.

According to the present invention, when the caller hangs up or immediately after the call, if the receiver receives the call, the caller can recognize the call and make a call with the receiver, thereby reducing the number of retries. have. In addition, since the receiver can visually check the hook-off state, the caller does not have to hold the handset while waiting for the receiver to answer the call, thereby increasing the utilization of time.

Description

A Telephone Including Function of Surveying Receiver's Hookoff}

The present invention relates to a telephone, and in more detail, even when the dialed caller is not connected to the receiver and puts down the phone's handset, the telephone monitors the receiver's hook state while maintaining the hook-off state for a predetermined time. The present invention relates to a telephone having a receiver hookoff monitoring function that indicates to a caller when a receiver hooks off.

General landline telephone is one of the most used communication means in everyday life because of its excellent call quality and ease of use. This means that when the caller picks up the handset of the telephone and dials the other party's telephone number, the telephone company's exchange recognizes it and connects the receiver's telephone with the caller's telephone. At this time, the exchange of the telephone station provides the ring signal synchronized with the receiver and the caller, and blocks the ring signal when the receiver picks up the handset or the caller puts down the handset.

In life, there are many situations in which the caller hangs up while the called party picks up the call or the callee picks up the phone right after the caller hangs up. In other words, the ringing often occurs when the receiver is in the bathroom or picks up the key at the front door and enters the house. Is hard.

Therefore, the present invention has been made to solve the above-mentioned problems of the prior art, even if the caller dials and hangs down the handset while the call is not connected, the hook state of the receiver telephone is monitored and hooked off for a predetermined time. It is an object of the present invention to provide a telephone with a receiver hookoff monitoring function that displays the caller to make a telephone call.

1 is a block diagram illustrating a telephone having a receiver hookoff monitoring function according to an embodiment of the present invention.

※ Explanation of code about main part of drawing ※

110: transformer 120: voltage amplifier

130: bandpass filter 140: comparator

150: handset switch 160: line interface unit

170: central processing unit 180: timer

190: user hookoff display unit 200: receiver hookoff display unit

A telephone having a receiver hookoff monitoring function according to the present invention for achieving the above object comprises: ring signal detection means for detecting a ring signal transmitted through a trunk line from an exchange;

A hook switch for switching the connection of the trunk line and the ring signal detecting means;

A handset switch for detecting a lifted-down state of the telephone handset;

Recognizing the state that the user lifts the handset through the handset switch, operates the hook switch to the hookoff state, outputs a user hookoff display signal, and inputs the input state of the ring signal through the ring signal detecting means. When the receiver hooks off, the receiver hooks off and outputs the receiver hook-off indication signal. If the user puts down the handset while the ring signal is being input, the telephone is held in the hook-off state for a predetermined time. A central processing unit that monitors the hook-off state of the receiver and outputs a receiver hook-off indication signal when the receiver hooks off, and operates the hook switch in a hook-on state if the receiver does not hook off for a predetermined time;

User hook-off display means for displaying a hook-off state of the telephone to the outside when a user hook-off display signal is input from the central processing unit; And

And a receiver hookoff display means for displaying the hookoff state of the receiver's telephone to the outside when the receiver hookoff display signal is input from the central processing unit.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating a telephone having a receiver hookoff monitoring function according to an embodiment of the present invention.

The transformer 110 receives the ring signal transmitted through the trunk line from the exchanger and performs impedance matching with the output terminal, a voltage amplifier 120 that sufficiently amplifies the signal output from the transformer 110, and the voltage amplifier 120. Bandpass filter 130 for passing only the frequency corresponding to the ring signal of the signal output from the) and the comparator 140 for converting the ring signal passed through the bandpass filter 130 to a digital signal to convert it into a digital signal A hook switch (HS) for switching the connection of the trunk line and the transformer (110), a handset switch (150) for detecting a lifting state of the user's telephone handset, and a lifting and lowering of the handset switch (150) Line interface unit 160 which transmits the load state to the rear stage, ring signal input state is input from comparator 140, and handset switch state is input from line interface unit 160, and the receiver hooks off. A central processing unit (170) for performing a monitoring function and controlling the overall function of the phone, and a timer (180) for providing timing information to the central processing unit (170) after being set and operated under the control of the central processing unit (170). ), A user hook-off display unit 190 displaying the hook-off state of the phone under the control of the central processing unit 170, and a receiver displaying the hook-off state of the receiver phone under the control of the central processing unit 170. The hook-off display unit 200 is included.

The central processing unit 170 recognizes that the user picks up the handset through the line interface unit 160 and controls the user hookoff display unit 190 to operate the hook switch HS in a hookoff state so that the trunk line and the transformer can be moved. In addition to allowing the 110 to be connected, the hook-off state of the hook switch HS is displayed. In addition, the ring signal input state transmitted from the exchange is monitored, and when the receiver picks up the receiver and the receiver hookoff is detected, the receiver hookoff display unit 200 is controlled to display the receiver hookoff state. In addition, when the user puts down the handset while the ring signal is continuously input from the exchange, the timer 180 is operated by receiving the input via the line interface 160. While the timer 180 is running, the user hookoff display unit 190 is continuously operated so that the telephone is electrically connected to the hookoff state. If the receiver picks up the handset and the receiver hookoff is detected while the timer is running, the receiver hookoff display unit 200 is controlled to display the receiver hookoff state. When the timing information is transmitted from the timer 180 after the set time, the operation of the user hookoff display unit 190 is stopped and the hook switch HS is turned off.

The line interface unit 160 described above is configured as an optocoupler, and the user hookoff display unit 190 and the receiver hookoff display unit 200 are configured as photodiodes. In addition, the handset switch 150 and the hook switch (HS) can be configured to interlock.

Referring to the operation of the telephone with a receiver hookoff monitoring function according to the present invention configured as described above are as follows.

First, when a user wishes to talk to any recipient and lifts the handset, the switching state of the handset switch 150 is changed and transmitted to the central processing unit 170 through the line interface unit 160. Then, the central processing unit 170 operates the user hook-off display unit 190, the relay (L1) is activated, the hook switch (HS) is a hook-off state to connect the trunk line and the transformer 110. In addition, the hook-off state of the telephone is displayed externally.

When the user dials the receiver's telephone number while holding the handset, it is signaled by a dialing circuit (not shown) and delivered to the telephone exchange. The exchange then connects the recipient with the telephone number and the user, providing a ring signal that is synchronized to the recipient and the calling telephone. The ring signal provided to the caller is delivered to the handset of the caller's telephone, and the ring signal provided to the receiver is sent to the ringer circuit to generate a ring.

On the other hand, the ring signal provided to the sender is processed through the transformer 110, the voltage amplifier 120, the band pass filter 130, the comparator 140 through the hook switch is provided to the central processing unit 170. Central processing unit 170 recognizes that the receiver has not lifted the handset. At this time, when the receiver hears the ringing sound and lifts the handset, the ring signal provided from the exchange is blocked, so that the central processing unit recognizes that the receiver has picked up the handset, and activates the receiver hookoff display unit 200 to hook off the receiver. Display the status externally.

On the other hand, if the caller puts down the handset (hangs up the phone) while the receiver does not pick up the handset, the switch state of the handset switch 150 is reversed, which is the central processing unit 170 through the line interface unit 160. Is delivered).

Then, the central processing unit 170 operates the timer 180 and continuously operates the user hook-off display unit 190 during the time when the timer 180 is operated to control the caller's telephone to be electrically hooked off. . That is, by operating the relay (L1) hook switch (HS) to continuously connect the trunk line and the transformer 110, so that the user's hook-off state is displayed to the outside.

When the receiver receives a call while the central processing unit 170 extends the caller's hook-off, the ring signal provided from the exchange is blocked, which is transmitted to the central processing unit 170. At this time, the central processing unit 170 drives the receiver hookoff display unit 200 to inform the caller of the receiver's hookoff state.

However, if the receiver does not answer the call by the time set in the timer 180, that is, if the ring signal is continuously provided until the timing information is provided from the timer 180, the central processing unit 170 displays the user hook-off display unit ( In operation 190, the driving of the relay L1 is stopped so that the hook switch is in the hook-on state and the display of the hook-off state is stopped. This puts the telephone into a substantially hooked up state.

While the invention has been described above based on the preferred embodiments thereof, these embodiments are intended to illustrate rather than limit the invention. It will be apparent to those skilled in the art that various changes, modifications, or adjustments to the above embodiments can be made without departing from the spirit of the invention. Therefore, the protection scope of the present invention will be limited only by the appended claims, and should be construed as including all such changes, modifications or adjustments.

As described above, according to the present invention, when the caller hangs up or immediately after the caller receives the call, the caller can recognize the call and make a call with the receiver, thereby reducing the number of retries. It works.

In addition, since the receiver can visually check the hook-off state, the caller does not have to hold the handset while waiting for the receiver to answer the call, thereby increasing the utilization of time.

Claims (1)

Ring signal detecting means for detecting a ring signal transmitted from the exchange via the trunk line; A hook switch for switching the connection of the trunk line and the ring signal detecting means; A handset switch for detecting a lifted-down state of the telephone handset; Recognizing the state that the user lifts the handset through the handset switch, operates the hook switch to the hookoff state, outputs a user hookoff display signal, and inputs the input state of the ring signal through the ring signal detecting means. When the receiver hooks off, the receiver hooks off and outputs the receiver hook-off indication signal. If the user puts down the handset while the ring signal is being input, the telephone is held in the hook-off state for a predetermined time. A central processing unit that monitors the hook-off state of the receiver and outputs a receiver hook-off indication signal when the receiver hooks off, and operates the hook switch in a hook-on state if the receiver does not hook off for a predetermined time; User hook-off display means for displaying a hook-off state of the telephone to the outside when a user hook-off display signal is input from the central processing unit; And And a receiver hookoff display means for displaying a hookoff state of the receiver's telephone to the outside when the receiver hookoff display signal is input from the central processing unit.