KR100697724B1 - Call connection device - Google Patents

Abstract

The present invention relates to a telephone connection device for connecting a wired telephone, a mobile telephone and a wired telephone line.

 In particular, when a call tone is detected from the connected mobile phone when the phone line is not in a line, the phone line is disconnected from the wire line and the call signal is sent to make a call to the landline. If the user hears the ring tone and picks up the handset, the ringer stops the ringing tone and allows the caller to talk to the called party using the mobile phone.

If a call is detected from another phone while talking on a landline or a mobile phone call, a call notification signal is sent to the speaker of the handset.

In addition, the user does not accidentally lower the handset, thereby preventing the user from excessively continuing the call with the mobile phone.

According to the present invention, after the user arrives at the office or home, the user can keep the mobile phone in a predetermined place, and can make a call with the other party who calls the mobile phone with a wired telephone disposed at an appropriate location that is relatively easy to use.

Mobile phone, wired line, telephone, ring signal, hand free, zener diode, speech network, call, ring tone, connection, exchange, hook, hook detection, ring detection

Description

Telephony switching apparatus

1 is an electrical block diagram of a call connection device according to the present invention;

2A and 2F are partial detail views of FIG. 1,

3 is a flowchart illustrating a call connection providing method according to the present invention.

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The fixed line telephone is operated by a signal having a predetermined impedance output from the exchange. When the user picks up the handset of the wired telephone, the wired telephone connects the internal zener diode to the signal line of the wired telephone.
Therefore, if the signal from the exchange is higher than this zener diode voltage, the wired line voltage will be higher than the zener diode voltage when the receiver is put down, and the wired line voltage will be lower than or equal to the zener diode voltage when the receiver is lifted. . That is, the exchange determines whether the user picked up the handset by measuring this voltage.

These days, a general wireline telephone is an electronic device using a bridge diode circuit for matching the polarity of the semiconductor element and the semiconductor element with the polarity of the line.
The switch connected to the landline telephone sends a half-wave signal having a peak of +48 volts and a half-wave signal having a peak of -48 volts for a call to the landline telephone. This is called a ring signal.
However, a typical landline phone employs the above bridge diode circuit, which will operate as a half-wave signal near +48 volts. In other words, when sending a ring signal to a wired telephone these days, only a half-wave signal having a peak of about +48 volts may be sent.

During the call to the landline, the exchange must know that the handset is lowered, that is, the call is terminated. Therefore, during the call, the exchange must apply a signal having a certain impedance and having a voltage higher than the zener diode voltage used in the landline to the landline. do. This signal is distorted according to the sound information to be sent from the exchange to the landline. The distortion signal is an alternating current component, and a wireline telephone reads and processes the alternating current component from the signal to operate the speaker. At this time, the inside of the telephone line processes the microphone signal, distorts the signal of the telephone, and transmits the signal to the exchange. This distortion should be relatively small.

Commercially available mobile phones have external terminals for hand-free use.

It is composed of a line connected to the speaker, a line connected to the microphone, and a ground line. If the line connected to the microphone and the ground line are connected and released, the call is recognized as a start / end signal. In other words, the two wires act as switches.

Sounds generated by the mobile phone include a ringing tone, a short confirmation sound, a battery status notification sound, and a time alarm notification sound.

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If you're a normal user, all but the ringtones on your cell phone use short or long duration repeats. Therefore, the average user hears a sound before initiating a phone call. Some persistent sound can be considered a ring tone.

The present invention relates to a call connection device connected between a general telephone, an external terminal for hand-free of a mobile telephone, and a wired telephone line.

If the power is not turned on or the ringing sound of the mobile phone is not detected, the call connection device of the present invention connects a general telephone to a wired telephone line.

When not connected to a landline, if the connected mobile phone detects a ringing tone, it disconnects the landline from the landline and outputs a ring signal to the landline to the landline. If you listen to the phone and pick up the handset, stop the ring signal and use the landline to make a mobile phone call. If you pick up the phone again, disconnect the phone and end the call.

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If a phone call is detected on the landline or connected to a mobile phone and a call from another phone is detected, a sound signal is sent to the handset speaker of the landline phone.

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In particular, it should be possible to prevent the user from accidentally dropping the handset so that excessive cell phone calls continue.

1 is an electrical block diagram of a call connection device according to the present invention.
As shown in FIG. 1, a call connection device between a mobile telephone wireline telephone and a wired telephone line according to the present invention includes a wired telephone line connection terminal connected to a wired telephone line of an exchanger to receive a sound signal, that is, a ringing tone from the exchange. A wired telephone line connection unit for outputting a corresponding call sound detection signal and transmitting a sound signal input from one side, that is, a call signal to the other side; A mobile telephone call open switch connected to one side of a wire telephone line connection unit; A wired telephone connection terminal is provided which is connected to a handset and a hook of a wired telephone, and outputs a hook state detection signal according to the hook state of the wired telephone. Wired telephone connection unit for transmitting the sound signal to the other side; A mobile phone call start / stop switch connected to one side of a wired telephone connector; It is equipped with a mobile phone connection terminal that is connected to the speaker and microphone of the mobile phone and receives the signal generated from the speaker of the mobile phone to output the speaker active detection signal, and is connected to the wired phone connection through the mobile phone call start / stop switch And a control unit for connecting the wired telephone connection unit to the wired telephone line connection unit or the mobile telephone connection unit by controlling the above-described switches by receiving the various detection signals described above. .

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In the above-described configuration, the wired telephone line connection unit converts a sound signal input through the wired telephone line connection terminal into a predetermined polarity matching signal used in the call connection device and outputs a ring tone detection signal to the open switch and the control unit during the mobile phone call. And a bridge circuit for outputting to the side call sound detection circuit. At this time, R1 and R2 of the line-side call sound detection circuit are resistors for dividing a voltage in order to detect a call sound signal coming from the exchange.
Next, the mobile phone connection unit includes a speaker terminal connected to a speaker of the mobile phone and a mobile phone connection terminal including a microphone terminal for transmitting a sound signal output from the wired telephone connection unit to the microphone of the mobile phone; AC pass filter that transmits the presence or absence of sound signal output from speaker terminal and sound signal output from speaker terminal, and call status notification signal to notify the call signal detection signal from wired telephone line connection. It includes audio preprocessing circuit to deliver to.
Next, the wired telephone connection unit is connected to the control unit, the ring tone / pull-up circuit for generating a voltage for monitoring the handset state of the wired telephone when a ringing sound is generated through the speaker in the mobile phone or the mobile telephone connection and the wired telephone connection; Converts the sound signal transmitted from the audio preprocessing circuit to the wired telephone, or extracts the sound signal generated from the wired telephone and outputs it to the microphone terminal. It comprises a detection circuit. At this time, R3 and R4 of the wire telephone hook state detection circuit are resistors for dividing voltage in order to grasp the state of the handset.

Therefore, if there is no speaker active detection signal, the control unit closes the open switch during the mobile phone call to connect the wired telephone and the wired telephone line. Disconnect the device and operate the mobile phone call start / stop switch to connect the landline phone with the mobile phone.

In particular, when a ring tone detection signal is input from the wired telephone line connection unit while the wired telephone and the mobile telephone are connected, the control unit generates a call status notification signal and outputs it to the wired telephone through the audio preprocessing circuit and the speech network.

On the other hand, when the power is not applied, when the call is not received from the mobile phone or when the call is not made by the mobile phone, the open switch is closed during the mobile phone call. It becomes the state. At this time, no signal is made in the 'call tone / pull-up circuit', and the 'speech network', 'line-side call tone detection circuit' and 'telephone hook detection circuit' have high impedance, so the effect on the connection of the wire telephone line should be minimal. is.

2A and 2F are partial detail views of FIG. 1.

First, FIGS. 2A and 2B are detailed views of a ring tone / pull-up circuit applicable to the present invention, and FIG. 2A shows a ring tone / pull-up circuit that generates a ring tone with a power source other than 48 [V], and FIG. V] Represents a ringing tone / pull-up circuit that generates a ringing tone on the power supply.

2C and 2D are detailed views of a switch applicable to the present invention, in which FIG. 2C shows a switch using a relay and FIG. 2D shows a switch circuit using a FET.

Finally, Figure 2f is a detailed view of the speech network according to the present invention, an exemplary circuit of a speech network implemented with OP AMP and transistor.

3 is a flowchart of a method for providing a call connection according to the present invention, wherein a call flag and a call flag are determined according to a call and a call state between a cellular phone connection unit and a wired telephone connection unit. That is, if no sound signal is detected from the mobile phone while the landline phone is not in a call, the 'call flag' and the 'call flag' will show the initial state '0'. The mobile phone call start / stop switch is open.

First, check whether the handset of the wired telephone is in a down state, that is, whether it is HOOK OFF.

At this time, if there is a speaker detection signal, the call is generated from the mobile phone. Therefore, change the 'call flag' to 1, open the 'open switch for cell phone call', generate a ring tone signal, and check the HOOK OFF status.

At this time, if you pick up the handset of the wired telephone, HOOK OFF is detected, so the generation of the ring tone signal is stopped, 'call flag' is reset to 0, and 'call flag' is changed to '1'. In addition, by controlling the ring tone / pull-up circuit to generate a constant voltage, by operating the 'mobile call start / stop switch' it is possible to talk to the called party and the wired telephone with a mobile phone.

On the other hand, when the handset is lowered, the 'call flag' is reset to 0, the voltage is stopped, the 'mobile call start / stop switch' is activated, and the 'cell phone open switch' is closed.

On the other hand, if the handset is detected but the 'call flag' or 'call flag' is 0, it indicates that the call is on a landline telephone. Inform the user.

In addition, the 'line side call tone detection circuit' may detect an external call tone during a call of the mobile phone, that is, during a call with a call counterpart called by the mobile phone with a wired telephone.

If an external call tone is detected during a mobile phone call, a call status notification signal is generated so that the user can know the call status through the handset through the speech network.
On the other hand, in order to prevent the user from inadvertently continuing the call with the mobile phone because the user has not inadvertently lowered the handset, if the speaker activation detection signal of the mobile phone is not detected when the user picks up the receiver, The operation may be regarded as being terminated, that is, the flags may be initialized, the switch may be initialized, or a sound signal of the cellular phone may be detected at a predetermined time, and if there is no signal, the cellular phone may be considered to be terminated.
At this time, in order to end the call of the mobile phone in a state where the phone is not in a call, the operation of eliminating the voltage generated internally or the operation of the switch does not affect the telephone line.

According to the present invention, the user can conveniently talk to the other party calling with the mobile phone by using the landline by connecting the mobile phone to the call connection device connected to the landline telephone disposed at an appropriate location that is easy to use after arriving at the office or home. do. In addition, the user can conveniently make a call with a wired telephone even while the user is charging the mobile phone, so there is no need to worry about charging. In addition, since the mobile phone is not placed in a pocket or placed in a predetermined position after a call, the time required for making a call can be reduced when a call is received by the mobile phone.

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Claims (4)

delete delete delete A wired telephone line connection terminal provided with a wired telephone line connection terminal connected to a wired telephone line of the exchanger to output a corresponding ringing tone detection signal when a ringing tone is received from the exchanger, and to transmit a sound signal input from one side to the other side; A mobile phone call open switch connected to one side of the wire line connection unit; A wired telephone connection terminal is provided which is connected to a handset and a hook of a wired telephone, and outputs a hook state detection signal according to the hook state of the wired telephone. The mobile telephone is connected to the wired telephone line connection through an open switch. Wired telephone connection unit for transmitting the sound signal input from the other side; A mobile phone call start / stop switch connected to one side of the wire telephone connection unit; A mobile phone connection terminal is provided which is connected to a speaker and a microphone of the mobile phone, and receives a signal generated from the speaker of the mobile phone to output a speaker active detection signal, and connects the wired phone through the mobile phone call start / stop switch. Is connected to the mobile phone connection unit for transmitting the sound signal input from one side to the other side and A control unit for receiving the respective detection signals and controlling each switch to connect the wired telephone connection unit to the wired telephone line connection unit or the mobile telephone connection unit; The control unit sets a call flag and a call flag according to a call and call state between the wired telephone connection unit and the mobile telephone connection unit, and generates a call status notification signal according to the state of each flag and each detection signal and connects each connection unit. When the hook state detection signal corresponding to the command to connect the landline telephone and the mobile phone is input after the speaker activation detection signal is input while the wired telephone and the mobile phone are not connected. Operating the mobile phone call start / stop switch to connect the wired telephone to the mobile telephone, and in response to the wired telephone and the mobile telephone being connected, corresponding to a command for terminating the connection between the wired telephone and the mobile telephone; The portable device when the hook state detection signal is inputted By operating the phone call start / stop switch, a call connection device, comprising a step of closing the connection of the mobile telephone and the wired telephone.

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