JPH03179957A - Telephone system - Google Patents

Abstract

PURPOSE:To dispense with wiring between an exchange unit and a slave unit by performing radio transmission/reception between the exchange unit which performs mutual switching of an extension and a line wire and the slave unit to which a telephone set is connected. CONSTITUTION:The radio transmission/reception circuit 12 of the exchange unit A is divided corresponding to the number of extensions i.e., the number of slave units B, and independent radio transmission/reception between each slave unit B and the exchange unit A is performed. The exchange unit A detects an incoming call from the line wire, and transmits the wave signal of each extension. Each slave unit B, when receiving the signal, rings the bell of a slave telephone set 20 connected to a connector 17. When the handset of either slave unit B is raised, the slave unit B to which the slave telephone set 20 is connected returns an off-hook signal to the exchange unit A.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a telephone system particularly suitable for home use.

[Conventional technology]

Conventionally, this type of telephone system includes the so-called home telephone system and the in-home exchange system that connects slave telephones.In both of these systems, a controller (exchange) is installed at any location in the house, and cables are connected to each room. Connect by pulling.

In the above home telephone system, only a specific slave telephone can be used, and in both systems, as the number of slave telephones increases, the amount of wiring in the house increases.In particular, in the case of a home telephone, since the number of wires per line is large, the connection is complicated.

[Problem to be solved by the invention]

Conventional telephone systems have the above configuration, so in some cases only certain slave phones can be used, and the amount of wiring increases depending on the number of slave phones, so wiring work is easier when there are many slave phones. However, along with the increase in construction costs,
There was a problem in that incorrect wiring occurred.

This invention was made by focusing on these problems, and allows the use of any slave phone, and also reduces the amount of wiring.
The purpose is to obtain a telephone system with easy wiring work.

[Means to solve the problem]

The telephone system of this invention is constructed as follows.

a. A telephone for connecting any two-wire telephone to a switching unit having a connecting part for connecting an outside line from a central telephone office, a radio transmitting/receiving circuit, and a switching device for connecting extensions to each other or to an extension and an outside line. A child unit having a connector and a wireless transmission/reception circuit is provided, and the child unit is installed at a desired position to perform wireless transmission/reception with the exchange unit.

b. In the telephone system of a above, the child unit is embedded in the wall of the room.

C1 In the telephone system of a or b above, the child unit has a built-in speaker for producing a specific ring tone.

d. In any of the telephone systems a to c above, wireless transmission and reception is performed using a power line carrier method.

e. In any of the telephone systems a to d above, the exchange unit is connected to a doorbell.

[Effect]

In the telephone system of the present invention, wireless transmission and reception is performed between an exchange unit that mutually switches between internal and external lines and a child unit to which a telephone is connected. Therefore, there is no need for wiring between the exchange unit and each room, and a desired slave telephone can be used. Additionally, by incorporating a speaker into the child unit, a specific ringtone can be played in each room.

〔Example〕

FIG. 1 is a block diagram of a home telephone system according to an embodiment of the present invention. The circuit configurations of a plurality of slave units) B to which slave telephones are connected are shown. In the figure, 1 is a connection part that connects an outside line from a telephone office via a protector 2, and 3 is a door phone 4.
5 is a switching device that connects extensions to each other or an extension and an outside line; 6.7 is a holding section and a calling section;
The telephone exchange 8 is configured as described above. 9 is a power supply unit into which AClooV is input from the commercial power supply 10; 11 is a control unit that controls the telephone exchange 8 and the wireless transmission/reception circuit 12; 13 is an antenna for performing wireless transmission and reception with each child unit B; 14 is a wireless transmission/reception circuit that performs wireless transmission and reception with the exchange unit A via an antenna 15; 16;
is the power supply section where AClooV is manually powered from commercial power supply lO,
17 is a telephone connector for connecting the slave telephone; 1
8 is a speaker for producing a specific ring tone.

FIG. 2 is an external view showing how the exchange unit I-A and slave unit B are installed in a house. As shown in FIG. 2(a), the exchange unit A is attached to the wall of a suitable room such as a living room. In addition, each child unit B
It is installed at a desired position in each room as shown in Figure (b). The figure shows a case in which the telephones are embedded in a wall near a power outlet 19 in each room, and slave telephones 20 are connected to the telephone connectors 17, respectively.

The wireless transmission/reception circuit 12 of the exchange unit A is divided into circuits according to the number of extensions, that is, the number of child units B, and independent wireless transmission and reception is performed between each of the two child units B and the exchange unit A. Then, when there is an incoming call from an outside line, exchange unit A detects the incoming call and transmits radio signals for each extension line. When each child unit B receives the signal, the child phone 20 connected to the connector 17
ring the bell. When the handset of any of the slave telephones 20 is lifted, the slave unit B to which the slave telephone 20 is connected sends an off-footer signal back to the exchange unit A. When exchange unit A receives this signal, it stops the bell ringing signal and connects its slave unit B to the outside line. This allows normal conversation with the outside world. The signal transmission and reception between exchange unit A and child unit B during that time is simply voice signals being transmitted and received via radio waves. When the conversation ends and the receiver is hung up, the child unit B sends an off-footer signal to the exchange unit A, and the exchange unit A disconnects from the outside line. Similarly, when making a call to the outside from the slave phone 20 in each room or talking between extensions, wireless transmission and reception is performed between exchange unit A and slave unit B, and the same control as above is performed. It will be done.

Here, since each child unit B is provided with a general telephone connector 17, any telephone can be used. In addition, since signals are transmitted and received between the exchange unit A and each child unit B using radio waves, there is no need to connect them with wired cables as in the past, and the amount of wiring does not change even if the number of child telephones 20 increases. Therefore, the total amount of wiring is reduced, the wiring work is simple, the construction cost is low, and incorrect wiring is prevented.

Although each child unit B requires an AClooV power source, in the above embodiment, the child unit B is of a wall-embedded type, which is convenient from the point of view of wiring work. Furthermore, since the slave unit B has a built-in speaker 18, even when a telephone is not connected, the speaker 18 can make a bell ringing sound when a call is received. Furthermore, it is also possible to perform wireless transmission and reception between exchange unit A and slave unit B using the power line carrier method, and in this case, it is also effective to make slave unit B a wall-embedded type and install it near the outlet 19. It is.

〔Effect of the invention〕

As described above, according to the present invention, wireless transmission and reception is performed between the exchange unit that mutually switches between internal and external lines and the child unit to which the telephone is connected, so that the wiring between the exchange unit and the child unit is This eliminates the need for wiring, reduces the amount of wiring, simplifies wiring work, reduces construction costs, prevents incorrect wiring, and allows the use of any telephone. Furthermore, if the slave unit has a built-in speaker, it can make a ring tone even when the telephone is not connected.

[Brief explanation of drawings]

FIGS. 1(a) and (b) are block diagrams showing an embodiment of the present invention, and FIGS. 2(a) and (b) show how the exchange unit and child unit of FIG. 1 are installed in a house. It is an external view. A...Exchange unit B-...Sub unit 1.3-...Connection section 4...Door phone 5...Switching device 8... ...Telephone exchange 12.14-...Radio transmitting/receiving circuit 7...
Telephone connector 18...Speaker 20...Slave phone

Claims (5)

[Claims] (1) For connecting any two-wire telephone to a switching unit that has a connecting part for connecting an outside line from a telephone office, a radio transmitting/receiving circuit, and a switching device for connecting extensions to each other or an extension and an outside line to each other. 1. A telephone system comprising a telephone connector and a slave unit having a wireless transmission/reception circuit, the slave unit being installed at a desired position to perform wireless transmission and reception with the exchange unit. (2) The telephone system according to claim 1, wherein the child unit is embedded in a wall of a room. (3) The telephone system according to claim 1 or 2, wherein the child unit has a built-in speaker for producing a specific ringing tone. (4) The telephone system according to any one of claims 1 to 3, wherein the wireless transmission and reception is performed using a power line carrier method. (5) The telephone system according to any one of claims 1 to 4, wherein the exchange unit is configured to connect a doorbell.