JPH0773305B2 - Home telephone system - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a home telephone system, and more particularly to a home telephone system in which a parent telephone, a child telephone and the like are connected.

Conventional device A main telephone unit and a telephone set, and a parent telephone set and a slave telephone set are connected by a plurality of wires such as a call line, a control line and a power line to form a home telephone system, and a call is made via the call line. Controls such as extension calling and external line holding are performed through control lines, and power supply to relays, amplifiers, etc. is performed through power lines.

SUMMARY OF THE INVENTION However, according to the configuration of the above-mentioned conventional technology, since the number of wires connecting telephones is large, the system is complicated even in a small-scale system, and the utilization is low for convenience. There is.

The present invention solves such conventional problems,
It is an object of the present invention to provide a home telephone system that can connect telephones with a simple wiring configuration regardless of the size of the system.

Means for Solving the Problems The present invention, in order to solve the above problems, a master unit having an external line terminal connected to an external line and a master unit terminal, a slave unit having a slave unit terminal, and the master unit terminal Connect to the above-mentioned slave unit terminal 1
A pair of wiring, a power supply circuit housed in the master unit, and a master circuit housed in the master unit, the outside line contact is connected to the outside line terminal, the extension line contact is connected to the power supply circuit, and the common contact is the side unit call. A first switching unit to which a section is connected and the master unit, the external line terminal is connected to the external line contact, the internal line contact of the first switching unit is connected to the internal line contact, and the common contact is the parent line. A second switching unit connected to the machine terminal, a master unit control circuit connected to the master terminal, controlling the common contact operation of the first and second switching units, and housed in the slave unit; A slave unit side call unit connected to the slave unit terminal, and a slave unit control circuit housed in the slave unit and connected to the slave unit terminal,
When an incoming call is received at the outside line terminal, the master unit control circuit detects the incoming call, switches the first switching unit to an outside line contact when a call is made on the master unit side, and the second switch when a call is made on the slave unit side. Switch the switching part of to the outside line side, and call each,
When calling to the outside line, the master unit control circuit and the slave unit control circuit detect this, and switch the first switching unit to the outside line contact when the call is on the master unit side, and when the call is on the slave unit side. When the second switching unit is switched to the outside line side to perform outgoing calls respectively and to make an extension call between the master unit and the slave unit, the master unit control circuit and the slave unit control circuit detect this and The first switching unit is switched to the extension contact, and the second switching unit is switched to the extension side.

With the above-described configuration, the present invention is connected between the master unit and the slave unit in each of the case where an incoming call is received at the outside line terminal, when the call is made to the outside line terminal, and in the case of an extension call between the master unit and the slave unit. A home telephone system can be realized through a pair of wires.

Example 1 FIG. 1 is a diagram showing the configuration of a home telephone system according to an example of the present invention. In the figure, MT is a master unit and RT is a slave unit.

First, the configuration of the master MT side will be described. BF is a blocking filter for preventing the carrier signal from flowing to the outside line, ry ₁ is a relay contact, and RY ₁ is a control coil that connects and disconnects the contact.

ry ₂ and RY ₂ and ry ₄ and RY ₄ also show the contacts and control coils of the relays that make up one set of relays. In addition, HS _1-1 and HS _1-2 are hook switches, T ₁ is the call unit on the base side of the telephone, CI is the incoming call detection circuit, P ₁ is the power supply, P ₁ F ₁ is the power supply circuit, and OSC ₁ is the ring tone. The generation circuit, CNT ₁ is a master unit control circuit, i / F ₁ is a data signal transmission / reception unit, and K ₁ is an operation key including an outside line key, an extension line key, a hold key, and the like. Here, ry1 is a first switching unit, an outside line contact is connected to the outside line terminal L, an extension line contact is connected to the power feeding circuit P ₁ F ₁ , and a common contact is connected to the master unit side call section T1. . ry2 is a second switching unit, the external line terminal L is connected to the external line contact, the internal line contact of the first switching unit ry1 is connected to the internal line contact, and the master terminal l is connected to the common contact.

Next, the configuration of the slave unit RT side will be described. Ry ₃ is a relay contact, RY ₃ is its control coil, Po ₁ and Po ₂ are the first and second power supply circuits, HS _2-1 and HS _2- , respectively. ₂ is a hook switch, T ₂ is a telephone handset unit of the telephone, OSC ₂ is a ringing tone generation circuit, CNT ₂ is a handset control circuit, i / F ₂ is a data signal transmitting / receiving unit, and K ₂ is an outside line key. , An extension key, a hold key, and the like. Further, 1 is a master terminal, l'is a slave terminal, and L is an external line terminal connected to an external line.

Next, the operation of the above embodiment will be described with reference to FIG. FIG. 1 shows a standby state, in which the child device RT is in a state where power is supplied from the parent device MT. That is, from the power source P ₁ of the parent device MT, the power feeding circuit P ₁ F ₁ → the relay contact ry ₂ → the terminal 1 enters the terminal l ′ of the child device RT in a loop, and the first power source circuit Po ₁ of the child device and the relay Contact ry ₃ → Power is supplied through the path of the _second power supply circuit Po ₂ .

Now, when there is an incoming call from the external line terminal L, the incoming call detection circuit CI of the parent device MT operates and sends a signal to that effect to the control circuit CNT ₁ .
As a result, the control circuit CNT ₁ drives the ringing oscillation circuit OSC ₁ and causes the speaker SP ₁ to ring a ringing tone. Further, the control circuit CNT ₁ sends a carrier signal modulated by the calling control data from the data sending / receiving unit i / F ₁ . The modulated carrier signal enters the data transmission / reception section i / F ₂ of the child device RT via the parent device terminal l → child device terminal l ′, and is demodulated there to be the control circuit CN.
Input to T ₂ . As a result, the control circuit CNT ₂ drives the call oscillation circuit OSC ₂ and drives the speaker SP ₂ . In this way, the incoming call of the master device MT and the slave device RT is established.

Next, a case where an external call is made by the master MT will be described. Hook switch HS _1-1 , H.
When S _1-2 is closed, the contact yr ₁ (control coil RY ₁ ) of the relay operates to connect the call section T ₁ and the outside line, and the answer call becomes possible. At this time, the control circuit CNT _{1 transfers} the data indicating that the master MT is using the outside line to the data transmitter / receiver i / F ₁ → terminal 1 → terminal l ′ → loop of the data transmitter / receiver i / F ₂ of the slave RT. With control circuit CN
Input to T ₂ . Then, the indicator LED ₂ is turned on and an indication that the outside line is being used is displayed. Since this time privacy function is activated, not possible external connections from also handset RT by operating the operation key K _2.

Next, a case of making an outside line call by using the handset RT will be described. When the cordless handset RT is off-hook, the hook switch HS _2-1 is closed and the call section T ₂ is connected to the terminal 1 '. At the same time, the hook switch HS _2-2 activates the control circuit CNT ₂ to send data notifying that the cordless handset is using the outside line, the data transmission / reception unit i / F ₂ → terminal 1 ′ → terminal 1 → parent device. It is sent to the control circuit CNT ₁ in the loop of the MT data transmission / reception unit i / F ₁ . As a result, the control circuit CNT ₁ switches the relay contact ry ₂ (control coil RY ₂ ). Therefore, the cordless handset RT can make an outside line call through the relay contact ry ₂ → blocking filter BF → outside line terminal L. At this time, the control circuit CNT ₁ lights up the indicator LED ₁ to indicate that the cordless handset RT is using an outside line, and activates the confidential communication function to prevent the outside line connection by operating the operation key K _1. . On the other hand, the control circuit CN of the handset RT
T ₂ switches the relay contact ry ₃ (control coil RY ₃ ) to disconnect the ringing tone oscillator OSC ₂ load. This secures the necessary power supply for the call of the handset RT.

When making a call to an outside line, by pressing the operation keys K ₁ or K ₂ after both the master unit MT and the slave unit RT are off-hook, the same operation as the above-described response to the outside line is performed, and then the talking unit T ₁ Alternatively, T ₂ is connected to an outside line respectively, and then a dial signal is sent from a dial circuit incorporated in the call units T ₁ and T ₂ to call the other party, and then a call becomes possible.

Next, a case of making an extension call will be described. First, the base unit MT
When calling the child device RT, after the off-hook of the parent device MT,
Press the operation key K ₁ for extension calls. This allows the control circuit
When the CNT ₁ transmits the carrier signal modulated by the extension calling data from the data transmitting / receiving unit i / F ₁ , the terminal l → terminal l ′ →
The control circuit CNT ₂ handset in a loop of a data transmitting and receiving unit i / F ₂ of the handset
Sent to. As a result, the control circuit CNT ₂ is
Drive C ₂ to make speaker SP ₂ ring.

On the other hand, when the child device RT calls the parent device MT, the reverse route, that is, the control circuit CNT ₂ → data transmission / reception section i / F ₂ → terminal l ′ → terminal 1 → data transmission / reception section i / F ₁ → control Circuit CNT ₁ → Ringing tone oscillator OSC ₁ → Rings ringing sound in the route of speaker SP ₁ .

Subsequent calls are made via the call section T _{1 of the base} unit MT → hook switch H.
S _1-1 → Relay contact ry ₁ → Relay contact ry ₂ → Terminal l → Terminal l '→ Hook switch HS _2-1 of cordless handset RT → External communication circuit formed by the loop of the communication unit T ₂ .

In addition, in the case of an extension call, since sufficient power is supplied from the power supply P ₁ of the parent device MT through the power feeding circuit P ₁ F ₁ , the relay contact ry ₃ of the child device RT is not switched.

When the parent device MT wants to put the outside line on hold during the outside line call, the operation key K ₁ is operated. As a result, the control circuit CNT ₁
Closes the relay contact ry ₄ to hold the outside line in the holding circuit H, and switches the relay contacts ry ₁ and ry ₂ to the extension side.

Similarly, when the handset RT wants to hold the outside line during an outside line call, the operation key K ₂ is operated. In this case, first
RT control circuit CNT _2- > data transmission / reception section i / F _2- > terminal l '-> terminal _1- > data transmission / reception section i / F _1- > control circuit CNT ₁ loops the pending control data. As a result, the control circuit CNT ₁ carries out the above-mentioned system operation to put the external line in a suspended state.

When a response is made again from the hold state to the outside line, the hold state is released and the relay contact group is switched to the outside line side by operating the operation keys K ₁ or K ₂ .

As described above, according to the embodiment of the present invention, the home telephone system can be formed by connecting the parent device MT and the child device RT with only one pair of two-wire wirings, so that the system configuration is simplified.

EFFECTS OF THE INVENTION The present invention has the following effects, as is apparent from the above-described embodiments.

Since the power supply for the control power supply, the voice signal for communication, and the control carrier data are superimposed on the wiring (two lines) for connecting the master unit and the slave unit, the system configuration becomes simple. As a result, the existing 2-wire wiring can also be used, which increases the utilization of the system.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a home telephone system according to an embodiment of the present invention. MT …… Main unit, RT …… Slave unit, BF …… Blocking filter, RY ₁ , RY ₂ , RY ₃ , RY ₄ …… Relay control coil, ry ₁ , r
y ₂ , ry ₃ , ry ₄ …… Relay contact, HS _1-1 , HS _1-2 , HS _2-1 , HS
_2-2 …… Hook switch, T ₁ , T ₂ …… Telephone call part, CI
…… Incoming call detection circuit, P ₁ …… Power supply, P ₁ F ₁ …… Power supply circuit, Po
₁ ...... First power supply circuit, Po ₂ ...... Second power supply circuit, OSC ₁ , O
SC ₂ …… Ring tone generation circuit, CNT ₁ , CNT ₂ …… Control circuit, i /
F ₁ , i / F ₂ …… Data signal transmission / reception unit, K ₁ , K ₂ …… Operation key group,
SP ₁ , SP ₂ …… Speaker, LED ₁ , LED ₂ …… Display, l, l ′…
… Terminal, L …… External line terminal.

Claims (1)

[Claims] 1. A master unit having an external line terminal connected to an external line and a master unit terminal, a slave unit having a slave unit terminal, and a pair of wires connecting the master unit terminal and the slave unit terminal. , The power supply circuit housed in the master unit, and housed in the master unit, the outside line contact is connected to the outside line terminal, the extension line contact is connected to the power supply circuit, and the common contact is connected to the master unit side call section. The first switching unit and the master unit are housed, the outside line contact is connected to the outside line terminal, the extension line contact is connected to the extension line contact of the first switching unit, and the common contact is connected to the master unit terminal. And a master unit control circuit that is connected to the master unit terminal and controls the common contact operation of the first and second switch units, and is housed in the slave unit and the slave unit terminal. Handset side call section connected to the handset, and handset control circuit housed in the handset and connected to the handset terminal Includes a case where an incoming call to the outside line terminals, the base unit control circuit,
The slave unit control circuit detects this and switches the first switching unit to the outside line contact when the call is on the master unit side, and switches the second switching unit to the outside line side when the call is on the slave unit side. When the call operation is performed and the call is transmitted to the outside line, the master unit control circuit and the slave unit control circuit detect it, and when the call is made on the side of the master unit, the first switching unit is switched to the outside line contact, and the slave unit is connected. In the case of a telephone call on the other side, when the second switching unit is switched to the outside line side and the respective outgoing calls are made and the extension telephone call between the master unit and the slave unit is made, the master unit control circuit detects this and the A home telephone system characterized in that the first switching unit is switched to an extension contact and the second switching unit is switched to an extension side.