JP2009038711A - Telephone communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily increase the number of telephone sets connectable to one common public telephone line so as to perform voice communication. <P>SOLUTION: The present invention relates to a telephone communication system including a master unit 2 which is connected to a public telephone line and capable of performing outside line communication and a slave unit 3<SB>1</SB>connected with the master unit 2 via a power line 8, wherein the master unit 2 includes a power line communication section (PLC section) 14A comprising a modulation circuit 30A and a demodulation circuit 31A and the slave unit 3<SB>1</SB>also includes a power line communication section (PLC section) 14B comprising a modulation circuit 30B and a demodulation circuit 31B. Extension communication via the power line 8 can be performed between the master unit 2 and the slave unit 3<SB>1</SB>by the modulating operation and the demodulating operation of the power line communication sections 14A, 14B. Furthermore, the slave unit 3<SB>1</SB>is connected to the public telephone line via the power line 8 and the master unit 2 to perform outside line communication. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a telephone communication system constructed in, for example, a facility premises or a home.

  In order for a plurality of telephones to share one public telephone line, means for branch connection (parallel connection) of the plurality of telephones to one public telephone line, or a plurality of telephones via a switch There are means for connecting to a public telephone line.

JP 2002-152250 A

  When connecting multiple telephones to a single public telephone line, the on-hook impedance of the telephone is reduced, so the number of telephones that can be connected to a single public telephone line with good communication is limited. . Note that the number of connectable telephones is as few as three or four.

  On the other hand, when a plurality of telephones are connected to one public telephone line via an exchange, a larger number of telephones can be connected with good communication. However, the telephone communication network having the plurality of telephones and the exchange needs to be constructed by work such as routing the communication network, and is troublesome.

  The present invention has been made to solve the above-mentioned problems, and an object thereof is to provide a telephone communication system that can easily increase the number of telephones that can be communicably connected to one common public telephone line. It is in.

  In order to achieve the above object, the present invention has the following configuration as means for solving the above problems. That is, the present invention is a telephone communication system having a master unit connected to a public telephone line and capable of external line communication, and a slave unit connected to the master unit via a power line, the master unit and the master unit Each of the slave units has a power line communication unit including a modulation circuit and a demodulation circuit, and the power line communication unit of the master unit modulates the telephone communication signal input from the public telephone line by the modulation circuit, and then It has a circuit configuration for outputting a modulated telephone communication signal to the slave unit via the power line, and the power line communication unit of the slave unit receives the modulated telephone communication signal output from the master unit as the demodulation circuit. And a circuit configuration for modulating the telephone communication signal input to the slave unit by the modulation circuit and then outputting the modulated telephone communication signal to the master unit via the power line. The parent The power line communication unit further has a circuit configuration for demodulating the modulated telephone communication signal output from the slave unit by the demodulation circuit, so that the slave unit can perform external line communication via the master unit. It is characterized by being.

  Each of the master unit and the slave unit of the telephone communication system according to the present invention has a power line communication unit and is connected to each other via the power line. Therefore, the slave unit can perform external line communication via the master unit, and can perform extension communication between the master unit and the slave unit or between the slave units. Further, when viewing the telephone communication system from the public telephone line side, it appears as if only the parent device is connected to the public telephone line. For this reason, a large number of slave units can be added with good communication without limiting the allowable number of line connections based on the on-hook impedance of the telephone.

  Furthermore, the master unit and the slave unit can be connected to each other in a communicable state by a very simple operation of inserting a power plug provided on each of the master unit and the slave unit into a power line outlet. Therefore, a telephone communication network between the parent device, the child device, and the child devices can be constructed easily and in a short time. Further, since communication can be made between the parent device and the child device or between the child devices via the power line, a telephone line for connecting the parent device to the child device and the child devices becomes unnecessary. For this reason, it is possible to eliminate the trouble of routing the telephone line between the parent device, the child device, and the child devices. Further, since the slave unit is connected to the public telephone line via the master unit, complicated equipment such as an exchange is not required.

  Furthermore, since a backup power supply unit is provided for each of the master unit and the slave unit, even if power supply from the power line is stopped due to a power failure, the master unit and the slave unit receive power supply from the backup power supply unit. External line communication and internal line communication can be performed.

  Embodiments according to the present invention will be described below with reference to the drawings.

As shown in the image diagram of FIG. 1, the telephone communication system 1 of this embodiment includes a telephone set of a master unit 2 and a plurality of slave units 3 _{1 to} 3 n (n is an integer of 2 or more). Is done. Handset 3 ₂ 3n has the same configuration as the sub-terminal 3 _1. Therefore, the configuration of the slave unit 3 ₁ will be described as a representative of the slave units 3 _{1 to} 3n. A detailed description of the configuration provided in a general telephone will be omitted.

  A telephone line 5 having a modular plug 4 at the tip is connected to the base unit 2. By fitting the modular plug 4 into the modular jack 7 connected to the public telephone line 6, the base unit 2 is connected to the public telephone line 6 and external line communication becomes possible.

Further, each of the main terminal 2 and sub-terminal 3 ₁ is provided with a power cable 9 for receiving power supply from the power line 8. The plug 10 connected to the distal end of the power cable 9, by inserting the outlet 11 provided in the power line 8, electric power is supplied from the power line 8 to the main terminal 2 and sub-terminal 3 _1.

2, each configuration of the main terminal 2 and sub-terminal 3 _1, is schematically shown by the block diagram. The base unit 2 includes a control unit 13A that controls the operation of the base unit 2, a power line communication unit (PLC (power-line-communication) unit) 14A, a backup power source unit 15, An incoming call detection unit 16, a line connection control switch 17, a call unit 18A, a reception unit 19, a transmission unit 20, a hook SW 21, a ringer unit 22, and a display unit 23 provided in a typical telephone. A memory unit 24, a convenience improving function unit 25, and a power supply unit 26.

The PLC unit 14A includes a modulation circuit 30A, a demodulation circuit 31A, a signal processing unit 32A, and a memory unit 33A. The memory unit 33A stores a program for controlling the operation of the signal processing unit 32, data of information necessary for controlling the operation of the signal processing unit 32, and the like. Modulation circuit 30A, and telephone communication signals such as voice signals output from the call unit 18A, after modulating a signal outputted from the control unit 13A, and outputs the modulated signal to the sub-terminal 3 ₁ through the power line 8 . Demodulating circuit 31A, as described below, demodulates the modulated signal by the sub-terminal 3 _1. Based on the program stored in the memory unit 33A, the signal processing unit 32A controls the modulation circuit 30A and the demodulation circuit 31A while referring to the data in the memory unit 33A as necessary.

The handset 3 ₁ includes a control unit 13B that controls the operation of the handset 3 ₁ , and also includes a PLC unit 14B, a backup power supply unit 15, and a general telephone set that are features of the present invention. Detecting unit 16, line connection control switch 17, calling unit 18B, receiving unit 19, transmitting unit 20, hook SW 21, ringer unit 22, display unit 23, memory unit 24, and convenience improvement A function unit 25 and a power supply unit 26 are included.

  The PLC unit 14B includes a modulation circuit 30B, a demodulation circuit 31B, a signal processing unit 32B, and a memory unit 33B. The memory unit 33B stores a program for controlling the operation of the signal processing unit 32, data of information necessary for operation control of the signal processing unit 32, and the like. Modulation circuit 30B modulates a telephone communication signal such as a voice signal output from call unit 18B and a signal output from control unit 13B, and then outputs the modulated signal to base unit 2 via power line 8. Demodulation circuit 31B demodulates the modulated signal output from base unit 2, and detects a telephone communication signal such as a voice signal output from call unit 18A of base unit 2 and a signal output from control unit 13A. . Based on the program stored in the memory unit 33B, the signal processing unit 32B controls the modulation circuit 30B and the demodulation circuit 31B while referring to the data in the memory unit 33B as necessary.

The memory unit 24 provided in the base unit 2 and sub-terminal 3 _1, individual identification information for identifying the 3 ₁ 3n base unit 2 and the slave unit are stored. Further, as will be described later, when the master unit 2 is operated as an exchange and used as a dedicated transfer device, a response message is stored in the memory unit 24. The response message has a content that prompts the communication partner to input additional information such as the telephone number of the handset in the telephone communication system 1 that desires communication. The additional information is stored in the memory unit 24 in association with the individual identification information of the parent device 2 and the child devices 3 _{1 to} 3n.

Base unit 2 and sub-terminal 3 convenience improving function unit 25 provided in the _1, Hold feature and, and telephone number registration function is intended for performing the function for improving the usability of the telephone, such as volume control .

Further, when a power failure, stops the power supply from the power line 8 to main terminal 2 and sub-terminal 3 ₁ of the power supply unit 26 provided to each, in each of the main terminal 2 and sub-terminal 3 _1, each circuit from the power supply unit 26 Will not be supplied with power. In this case, power from the backup power supply unit 15 connected to the power supply unit 26 to each circuit of the main terminal 2 and sub-terminal 3 ₁ is supplementarily supplied. The power supply from the backup power supply unit 15 to each circuit of the parent device 2 and the child device 3 ₁ is provided through a path that electrically connects the backup power supply unit 15 and each circuit of the parent device 2 or the child device 3 _1. The switching means S is turned on and off.

Hereinafter, an operation example for voice communication using a power line communication between the main terminal 2 and sub-terminal 3 _1.

First, an example of operation when a call request incoming signal is transmitted from the public telephone line 6 to the base unit 2 via the telephone line 5 will be described. When the incoming call detection unit 16 detects the incoming call signal, the incoming call detection unit 16 outputs the incoming call detection signal to the control unit 13A. Upon receiving the incoming call detection signal, the control unit 13A controls the ringer unit 22 and the display unit 23 to notify the incoming call and outputs the incoming call detection signal to the PLC unit 14A. Upon receiving the incoming call detection signal, the PLC unit 14A modulates the incoming call detection signal or the signal generated by the PLC unit 14A based on the incoming call detection signal by the modulation circuit 30A, and then converts the modulated signal to the power supply unit 26 and the power cable. 9 and outputs it to the sub-terminal 3 ₁ through the power line 8.

The modulated signal is input to the PLC unit 14B via the power line 8, the power cable 9, and the power source unit 26. Upon receiving the modulated signal, the PLC unit 14B demodulates the incoming call detection signal or the signal generated by the PLC unit 14A based on the incoming call detection signal by the demodulation circuit 31B. Then, the PLC unit 14B outputs an incoming call detection signal or a signal created based on the incoming call detection signal to the control unit 13B. Controller 13B which has received a call signal, controls the ringer 22 and the display unit 23 to notify an incoming call from the slave unit 3 _1.

Next, In operation example when the handset of the main terminal 2 or sub-terminal 3 ₁ is off-hook by notifying the incoming call. When the handset of the base unit 2 is turned off and hooked, the on / off state of the hook SW21 is switched, and the control unit 13A detects the base unit response signal. Then, the control unit 13A switches the line connection control switch 17 from the off state to the on state in order to connect the call unit 18A to the public telephone line 6, and ends the incoming call notification operation of the ringer unit 22 and the display unit 23. When the line connection control switch 17 is turned on, the telephone call section 18A is connected to the public telephone line 6 via the line connection control switch 17 and the telephone line 5 to enable external line communication, and voice communication is started.

Further, control unit 13A outputs a base unit response signal to PLC unit 14A. Then, PLC unit 14A that has received the base unit response signals, similar to the operation of the PLC unit 14A described above, modulates the parent device a response signal, and outputs the sub-terminal 3 _1. The PLC unit 14B that has received the modulated base unit response signal demodulates the base unit response signal in the same manner as the operation of the PLC unit 14B described above. Then, PLC unit 14B outputs a base unit response signal to control unit 13B. The control unit 13B that has received the base unit response signal causes the display unit 23 to notify that the base unit 2 is connected to the public telephone line 6 after terminating the incoming call notification operation of the ringer unit 22 and the display unit 23. .

Further, the sub-terminal 3 ₁ of handset when it is off-hook, switches the on-off state of the sub-terminal 3 ₁ hook SW21, the control unit 13B detects the handset response signal. Then, control unit 13B ends the incoming call notification operation of ringer unit 22 and display unit 23, and outputs a slave unit response signal to PLC unit 14B. Upon receiving the slave unit response signal, the PLC unit 14B outputs the modulated slave unit response signal to the master unit 2 in the same manner as the operation of the PLC unit 14B described above.

The PLC unit 14A that has received the modulated slave unit response signal demodulates the slave unit response signal by the demodulation circuit 31A. Then, PLC unit 14A outputs a slave unit response signal to control unit 13A. Upon receiving the slave unit response signal, the control unit 13A switches the line connection control switch 17 from the off state to the on state in order to connect the call unit 18A to the public telephone line 6, and also notifies the ringer unit 22 and the display unit 23 of the incoming call. to end the operation, further, the sub-terminal 3 ₁ is informed that it is being connected to a public telephone line 6. Upon receiving the handset response signal, the control unit 13A cuts off the connection between the call unit 18A, the receiver unit 19 and the transmitter unit 20, and the voice signal transmitted from the public telephone line 6 to the call unit 18A. Is controlled so as to be output to the PLC unit 14A.

PLC unit 14A which has received the voice signal, like the operation of the PLC unit 14A described above, and outputs the modulated audio signal to the slave unit 3 _1. Upon receiving the modulated voice signal, the PLC unit 14B demodulates the voice signal and outputs the voice signal to the call unit 18B in the same manner as the operation of the PLC unit 14B described above. In addition, the PLC unit 14B that has received the audio signal from the call unit 18B outputs the modulated audio signal to the base unit 2 in the same manner as the operation of the PLC unit 14B described above. Upon receiving the modulated voice signal, the PLC unit 14A demodulates the voice signal and outputs the demodulated signal to the call unit 18A in the same manner as the operation of the PLC unit 14A described above. The call unit 18A outputs a voice signal toward the public telephone line 6. As a result, the sub-terminal 3 ₁ can perform the outside line communication via the base unit 2.

Then, handset of the main terminal 2 or sub-terminal 3 ₁ is off-hook, In operation example in which a call request is. When the handset of base unit 2 is turned off / hooked and hook SW21 is turned on / off, control unit 13A detects that a call request is made. The control unit 13A switches the line connection control switch 17 from the OFF state to the ON state according to the call operation program stored in the memory unit 24, and continues to operate according to the call operation program. When the communication partner responds, communication with the communication partner is started by the operation of the communication unit 18A. Further, the control unit 13A outputs to the PLC unit 14A a base unit communication signal informing that the base unit 2 is connected to the public telephone line 6. PLC unit 14A that has received the base unit communicating signals, similar to the operation of the PLC unit 14A described above, modulates the signal in the parent device communications, and outputs the sub-terminal 3 _1. The PLC unit 14B that has received the modulated master unit communication signal demodulates the master unit communication signal in the same manner as the operation of the PLC unit 14B described above. Then, PLC unit 14B outputs the demodulated master communication signal to control unit 13B. The control unit 13B that has received the base unit communication signal causes the display unit 23 to display that the base unit 2 is being connected to the public telephone line 6.

Further, the sub-terminal 3 ₁ handset is off-hook, the switches are on-off state of the hook SW21, the control unit 13B detects that it is the call request. Controller 13B outputs in accordance with a call operation program stored in the memory unit 33B, a handset call signal indicating that the sub-terminal 3 ₁ is calling the PLC unit 14B, subsequently, calling Operates according to the operation program. Receiving the slave unit call signal, the PLC unit 14B modulates the slave unit call signal and outputs it to the master unit 2 in the same manner as the operation of the PLC unit 14B described above. The PLC unit 14A that has received the modulated slave unit call signal demodulates the slave unit call signal in the same manner as the operation of the PLC unit 14A described above. PLC unit 14A outputs the demodulated slave unit call signal to control unit 13A. Controller 13A that has received the handset calling signal is switched on the line connection control switch 17 from the OFF state, the connecting the handset 3 ₁ to a public telephone line 6, and controls the display unit 23 handset 3. Display that ₁ is connected to the public telephone line 6.

When the other party answers, the control unit 13A cuts off the connection between the call unit 18A, the handset 20 and the transmission unit 21, and an audio signal transmitted from the public telephone line 6 to the call unit 18A is sent to the PLC unit 14A. The communication unit 18A is controlled so as to be output. PLC unit 14A which has received the voice signal, like the operation of the PLC unit 14A described above, and outputs the modulated audio signal to the slave unit 3 _1. Upon receiving the modulated voice signal, the PLC unit 14B demodulates the voice signal and outputs the voice signal to the call unit 18B in the same manner as the operation of the PLC unit 14B described above. In addition, the PLC unit 14B that has received the audio signal from the call unit 18B outputs the modulated audio signal to the base unit 2 in the same manner as the operation of the PLC unit 14B described above. Upon receiving the modulated voice signal, the PLC unit 14A demodulates the voice signal and outputs the demodulated signal to the call unit 18A in the same manner as the operation of the PLC unit 14A described above. The call unit 18A outputs a voice signal toward the public telephone line 6.

Next, between the main terminal 2 and sub-terminal 3 _1, In operation example of internal calls. When the control unit 13A detects that the extension communication with the child device 3 ₁ is requested based on the operation information of the numeric keys of the parent device 2 and the identification information of the child device 3 ₁ of the memory unit 24, the extension communication The request signal is output to the PLC unit 14A. PLC unit 14A that has received the extension communication request signal, similar to the operation of the PLC unit 14A described above, modulates the extension communication request signal, and outputs the sub-terminal 3 _1. The PLC unit 14B that has received the modulated extension communication request signal demodulates the extension communication request signal in the same manner as the operation of the PLC unit 14B described above. Then, the PLC unit 14B outputs the demodulated extension communication request signal to the control unit 13B. Receiving the extension communication request signal, the control unit 13B operates in the same manner as when receiving from the public telephone line 6 described above. Then, when the handset of the handset 3 ₁ is taken, extension communication by power line communication between the base unit 2 and the handset 3 ₁ is started.

If the slave unit 3 ₁ requests the extension communication to the base unit 2 performs the same operation as the main terminal 2 to the sub-terminal 3 ₁ described above, on the contrary, the sub-terminal 3 ₁ base unit 2 described above A similar operation is performed. This makes it possible to initiate extension communication by power line communication with the main terminal 2 and sub-terminal 3 _1. Also it may be initiated by extension communication of same operation between the sub-terminal 3 ₁ and the slave unit 3n. Furthermore, the initiation by extension such as that the communication, extension communication also the same operation between three or more telephones connected via the power line 8 between the main terminal 2 and sub-terminal 3 ₁ and the slave unit 3n can do. Furthermore, the extension communication between the slave units can be started in the same manner while the master unit 2 is performing external line communication. Furthermore, in the case where three or more slave unit is provided, for example, when the sub-terminal 3 ₁ is performing outside line communication via the base unit 2, starts the extension communication between the remaining handset It can also be made.

  Next, an operation example in the case where the base unit 2 operates like a switch and forms a transfer-only telephone will be described. When the incoming call detector 16 detects that an incoming call is received from the public telephone line 6, the controller 13A switches the line connection control switch 17 from the off state to the on state. Then, the control unit 13A causes the communication unit 18A to transmit a response message stored in the memory unit 24 to the communication partner.

  Thereafter, when the control unit 13A detects that additional information related to the communication request destination child device is input from the communication partner, the control unit 13A reads the identification information of the communication request destination child device from the memory unit 24 based on the additional information. . Then, the control unit 13A uses the identification information of the slave unit to indicate that there is a communication request to the control unit of the slave unit that is the communication request destination by the same operation as that at the start of the extension communication described above. Notification via 14A. As a result, the PLC unit and the control unit of the slave unit that is the communication request destination operate, and the ringer unit and the display unit of the slave unit notify the incoming call. In this way, transfer to the communication request destination child device by the parent device 2 is performed.

As described above, each of the parent device 2 and the child devices 3 _{1 to} 3n performs various voice communication operations using power line communication.

In addition, this invention is not limited to the form of this embodiment, Various embodiment can be taken. For example, in this embodiment, the slave units 3 _{1 to} 3n are provided with the incoming call detection unit 16 and the line connection control switch 17 for connecting to the public telephone line 6 via the telephone line 5 in the same manner as the master unit 2. However, the slave units 3 _{1 to} 3n are not connected to the slave units 3 _{1 to} 3n, omitting the incoming call detection unit 16 and the line connection control switch 17 of the slave units 3 _{1 to} 3n. A dedicated telephone may be used.

In this embodiment, each of the master unit 2 and the slave units 3 _{1 to} 3n is provided with the backup power supply unit 15 so as to be operable even during a power failure. However, the circuit configuration can be simplified. In this case, the backup power supply unit 15 may be omitted.

Further, in this embodiment, the voice communication has been described. However, the slave units 3 _{1 to} 3n are connected to the public telephone line 6 via the master unit 2 to perform the external line communication of the FAX signal which is one of the telephone communication signals. It is also possible to perform extension communication of FAX signals between the parent device 2 and the child device 3 ₁ or between the child device 3 ₁ and the child device 3n.

Further, in this embodiment, an example in which the master unit 2 is automatically transferred to the communication request destination handset, of course, the response of the main terminal 2 or sub-terminal 3 ₁ in response to the incoming call from the public telephone line 6 who the main terminal 2 or sub-terminal 3 ₁ manually operated by the operation of the vehicle environment function unit 25 based on the manual operation may be transferred to the communication request destination telephone. Furthermore, in this embodiment, a plurality of slave units are provided, but one slave unit may be provided.

It is an image figure for demonstrating one Example of the telephone communication system which concerns on this invention. It is a block diagram for demonstrating each structure of the main | base station and the subunit | mobile_unit which comprise one Example of the telephone communication system which concerns on this invention.

Explanation of symbols

1 telephone communication system 2 base unit 3 ₁ 3n handset 6 public telephone line 8 power line 14A, 14B PLC unit 15 backup power supply unit

Claims (3)

  A telephone communication system having a master unit connected to a public telephone line and capable of external communication, and a slave unit connected to the master unit via a power line, each of the master unit and the slave unit, A power line communication unit including a modulation circuit and a demodulation circuit, wherein the power line communication unit of the base unit modulates the telephone communication signal input from the public telephone line by the modulation circuit, and then the modulated telephone communication signal The power line communication unit of the slave unit is configured to demodulate the modulated telephone communication signal output from the master unit by the demodulation circuit. And a circuit configuration for modulating the telephone communication signal input to the slave unit by a modulation circuit and then outputting the modulated telephone communication signal to the master unit via the power line, and the power line of the master unit The communication department The telephone has a circuit configuration in which the demodulator circuit demodulates the modulated telephone communication signal output from the slave unit, so that the slave unit can perform external line communication via the master unit. Communications system.   Each of the slave units is connected to each other via a power line, and each power line communication unit of each of the slave units is input to each of the slave units. After the telephone communication signal is modulated by the modulation circuit, the modulated telephone communication signal is output to at least one of the other slave units and the master unit via the power line, and The power line communication unit of the parent device modulates the telephone communication signal input to the parent device by a modulation circuit, and then transmits the modulated telephone communication signal to at least one of the plurality of child devices via the power line. In addition, the power line communication unit of each of the master unit and each slave unit has a circuit configuration for demodulating the output telephone communication signal after modulation by a demodulation circuit. Each slave unit and parent Telephone communication system according to claim 1, wherein it is possible extension call between each other is.   3. The telephone communication system according to claim 1, wherein each of the master unit and the slave unit includes a power supply unit that supplies power from a power line to a circuit included in each of the master unit and the slave unit, and the power line And a backup power supply unit for supplying power to the circuit and continuing the circuit operation when no power is supplied to the power supply unit.

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