KR20010001429U - Line Securable Telephone used in Parallel Bridge Junction System - Google Patents

Abstract

The purpose of the present invention is to secure the security of the call by using two or more telephones connected in parallel, so that when one connected telephone is in a busy state, off-hooking the other telephone does not form a call path. To provide a secure telephone

The constitution of the present invention is a hook switch SW60, a power supply unit 10, a ringer 20, a hybrid 30, a signal conversion unit 40, a dialer unit 50, a handset ( In a telephone connected to a wired telephone network (90) consisting of 80, a telephone circuit of a power source applied from the telephone network (90) is sensed by detecting a voltage applied to a line connected to the telephone network (90) The call path control unit 70 further comprises a call path controlling the incoming, and the configuration of the call path control unit 70, by detecting the voltage applied to the line connected to the telephone network 90, the magnitude of the value According to the line voltage detection unit 71 for outputting a control signal corresponding to the power supply, the power supply is turned on / off according to the control signal output from the line voltage detection unit 71 is applied from the telephone network 90 Including a transistor Q71 for controlling the inlet to (10) Characterized in that made.

Description

Line Securable Telephone used in Parallel Bridge Junction System}

The present invention relates to a phone that is secure call security when connected in parallel, more specifically, when two or more phones are connected in parallel, the other phone is turned off when one of the connected phones is busy. The present invention relates to a telephone that secures the security of a call by preventing an off-hook from forming a call path.

In general, when the telephone area is wide or the number of lines is insufficient for the number of users, two or more telephones may be connected to one telephone line. In this case, two or more telephones may be connected to the telephone line in parallel. To use.

Hereinafter, a general telephone system will be described with reference to the accompanying drawings.

As shown in Figure 1, the configuration of a general telephone,

Hook switch (SW6) for opening and closing the line connected to the telephone network (8),

A power supply unit 1 for generating and outputting power required for the operation of the telephone by using power applied through a telephone line;

Ringer 2 that generates and outputs a sound that can be recognized by a user when a call originates from the telephone network;

A hybrid 3 for receiving and outputting a signal received from a telephone network 8 through a line and outputting a signal to be transmitted to the telephone network 8 via a line;

A signal converter 40 for receiving a signal input through the hybrid 3 and converting it into a baseband signal, receiving a signal to be transmitted, converting the signal into a transmission signal, and outputting the converted signal to the hybrid 3;

A dialer 5 for generating a tone signal according to a corresponding telephone number according to a user's operation and outputting the tone signal to the hybrid 3;

The handset 7 converts the signal output from the signal converter 4 into a voice signal that can be heard by the user, and converts the voice signal of the user into an electrical signal and outputs the signal to the signal converter 4. .

The operation of a general telephone made as above is as follows.

When the call arrives from the external telephone network 8, the ringer 2 operates accordingly to inform the user that the call has been received. Accordingly, when the user lifts the handset and turns on the hook switch SW6, the power supply unit 1 Power of -48 volts is applied.

Then, the power supply unit 1 generates and supplies the power required by the phone by using the power applied through the telephone network 8.

On the other hand, when the hook switch SW6 is turned on and a signal corresponding to a call is input, it is applied to the signal conversion unit 4 through the hybrid 3, and the signal conversion unit 4 transmits the signal to the baseband signal. Is converted into a handset 7, and the handset 7 outputs the signal as an audio signal that can be heard by a user using an internal speaker (not shown).

On the other hand, the handset 7 converts the user's voice into an electrical signal and outputs the signal, and the signal is converted into a transmission signal through the signal conversion unit 4 and output to the telephone network 8 through the hybrid 3. Is sent to the other party.

When a call is received from the other party, a phone call is made in the same manner as described above.

When the user first calls the other party, a tone signal is generated by dialing of the dialer unit 5, and the tone signal is transmitted to the telephone network through the hybrid 3, and by calling the other party, the telephone connection is established. The following operation works as when receiving the call.

However, when two or more telephones operated as described above are connected to one line in parallel, while the first user is using the first telephone to make a call, another second user is connected to the first telephone in parallel. If you pick up the handset to use the second telephone, the first telephone and the second telephone are connected, so they occupy the same voice line, you can listen to the conversation on the line, and you can also talk on the line. have.

However, in the above case, the first user may not know that the second user is listening to the contents of the call, and thus there is a problem that the security of communication is inferior.

In addition, there is a problem that the second user does not know that the first user is busy, and makes a noise on the telephone call of the first user who is busy by dialing, thus preventing a smooth phone call.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above. When two or more telephones are connected and used in parallel connection mode, the other telephone is turned off when one telephone is connected. It is to provide a telephone which ensures security by making a call so that a call path is not formed when hooked.

1 is a block diagram applying a telephone according to the prior art,

Figure 2 is a block diagram applying a phone that is secure call when parallel connection according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: power supply 20: ringer

30: hybrid 40: signal conversion unit

50: dialer 60: hook switch

70: call control unit 80: handset

90: telephone network

The configuration of the present invention for achieving the above object is made as follows.

In telephones connected in parallel connection,

Call path control means for sensing a voltage applied to a line and judging whether another telephone connected in parallel is in use according to the magnitude of the value, and blocking power from being applied from the telephone network into the telephone circuit;

According to the control of the communication path control means, when the power is supplied, characterized in that it comprises a power supply means for generating and outputting the power required for the operation of the phone by using the applied power.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

As shown in Figure 2, the configuration of the telephone system with the call security when the parallel connection according to an embodiment of the present invention is made as follows.

In telephones connected in parallel connection,

A channel controller 70 for sensing a voltage applied to a line connected to the telephone network 90 and controlling the in-circuit of the power applied from the telephone network 90 according to the magnitude of the value;

Hook switch (SW60) for opening and closing the line connected to the telephone network 90,

A power supply unit 10 for generating and outputting power necessary for the operation of the phone by using the power applied through the communication path controller 70;

Ringer 20 generates a sound that can be recognized by the user when a call is generated from the telephone network 90, and

A hybrid 30 which receives and outputs a signal received from the telephone network 90 through a line, and outputs a signal to be transmitted to the telephone network 90 through a line;

A signal converter 40 for receiving a signal input through the hybrid 30 and converting it into a baseband signal, receiving a signal to be transmitted, converting the signal into a transmission signal, and outputting the converted signal to the hybrid 30;

A dialer unit 50 for generating a tone signal according to a corresponding telephone number according to a user's operation and outputting the tone signal to the hybrid 30;

The handset 80 converts the signal output from the signal converter 40 into a voice signal that can be heard by the user, and converts the voice signal of the user into an electrical signal and outputs the signal to the signal converter 40. Characterized in that made.

The configuration of the call path control unit 70,

A line voltage detector 71 for sensing a voltage applied to a line connected to the telephone network 90 and outputting a control signal according to the magnitude of the value;

And a transistor (Q71) for turning on / off according to a control signal output from the line voltage detector 71 to control the power applied from the telephone network 90 to the power supply 10. Characterized in that made.

The operation of the embodiment of the present invention made as described above is as follows.

In general, a telephone station (not shown) connected to the telephone network 90 always supplies -48 volts of power to the subscriber. This voltage varies slightly depending on the line condition or installation distance, but the value is at least -30. More than bolts are maintained.

Although a constant voltage is applied through the telephone network 90 as described above, when the hook switch SW60 is turned off, the power is not drawn into the telephone.

In this state, if a call arrives from an external telephone network 90 and the telephones connected in parallel are not in use, the ringer 20 operates without turning off the power in the call control unit 70, and the telephone is connected to the user. Let them know you are here.

When the phone rings according to the operation of the ringer 20, the user lifts the handset to turn on the hook switch (SW60), accordingly the power of -48 volts from the telephone network 90 is applied.

Then, the power supply unit 1 generates and supplies the power required by the phone by using the power applied through the telephone network 8.

On the other hand, when the hook switch SW60 is turned on and a signal corresponding to a call is input, the signal is applied to the signal converter 40 through the hybrid 30, and the signal converter 40 is based on the signal. The signal is converted into a band signal and output to the handset 80, and the handset 80 outputs the signal as a voice signal that can be heard by a user using an internal speaker (not shown).

On the other hand, the handset 80 converts a user's voice into an electrical signal and outputs the signal, and the signal is converted into a transmission signal through the signal conversion unit 40 and output to the telephone network 90 through the hybrid 30. As a result, it is transmitted to the other party.

When a call is received from the other party, a phone call is made in the same manner as described above.

Then, when the user first picks up the handset to make a call to the other party, the hook switch SW60 is turned on. If there is no telephone in use among the telephones connected in parallel, the operation of the call path controller 70 is performed. Power from the telephone network 90 is applied to the telephone.

In addition, a tone signal is generated from the dialer unit 50 by the user's dialing, and the tone signal is transmitted to the telephone network 90 through the hybrid 30, and by calling the other party, a telephone connection is attempted. The following operation is performed as when the call is received to perform a phone call.

However, when the first user picks up the handset 80 to make a telephone call using the first telephone, when another second telephone connected in parallel with the first telephone is busy, the corresponding line is connected to the telephone network. Power below the applied power is applied, and the signal is sensed by the control unit 70 to block the power from being introduced into the phone.

That is, the line voltage detection unit 72 of the communication line control unit 70 detects the voltage of the line connected to the telephone network 90, and if the voltage is lower than a predetermined reference voltage, the line is determined to be busy and is low. A control signal of (low) is output, and the transistor Q71 is turned off accordingly.

Therefore, even when the hook switch SW60 is turned on, power is not drawn into the telephone, and thus the user cannot dial the phone.

In addition, since power is not applied, the signal converter 40 and the handset 80 do not operate.

Similarly, if the first phone is in a call, you cannot call or listen to the line using a second phone or other phone connected in parallel, so that the call can be secured accordingly. have.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, conversions, and modifications are possible within the scope without departing from the technical spirit of the present invention. It will be apparent to those who have knowledge.

Therefore, the present invention operates as described above, when using two or more telephones connected in a parallel connection form, the telephone line is not formed even if the other telephone is off-hook in the state where one connected telephone is in communication. This has the effect of securing security.

Claims (2)

In telephones connected in parallel connection, Call path control means for sensing a voltage applied to a line and judging whether another telephone connected in parallel is in use according to the magnitude of the value, and blocking power from being applied from the telephone network into the telephone circuit; According to the control of the communication path control means, when the power is supplied, the call security in parallel connection characterized in that it comprises a power supply means for generating and outputting the power required for the operation of the phone using the power applied cellphone. According to claim 1, The communication path control means, Line voltage sensing means for sensing a voltage applied to a line connected to a telephone network and outputting a control signal corresponding to the magnitude of the value; And a transistor configured to control input of power applied from the telephone network into the telephone according to a control signal output from the line voltage sensing means.