JPS61212925A - Key telephone set - Google Patents

Abstract

PURPOSE:To install a key telephone set while using a conventional indoor telephone line by superimposing an AC and frequency-division data signal on a DC power supply to connect a master set and the telephone set through two wires. CONSTITUTION:In supplying power from the master set 1 to a telephone set 2, the output of the power supply section 8 is cut for the AC component by a filter 9 and the DC signal is superimposed on an interface 3. The power is supplied to the power supply section 14 of the telephone set 2 by using a filter 15 so as not to avoid the effect onto the other signal. In talking from the telephone set 2 through a telephone line 4, the signal received from the telephone line 4 is a signal having a frequency in the voice band by the filter 5 and connects to the interface 3. The telephone set 2 uses a filter 11 to extract only the voice frequency from the signal from the interface 3 and sends it to a talking section 10. The talking is 2-way and the voice signal from the talking section 10 of the telephone set 2 is sent to the telephone line 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a button '#L' control device, and more particularly to a connection between a main device and a telephone.

[Conventional technology]

Conventionally, in this type of button telephone device, the call line, data line, and power line were separated, and the connection between the main unit and the telephone set was a four-wire type.

[Problem that the invention seeks to solve]

The above-mentioned conventional button X-packing device has a disadvantage in that the connection between the main device and the telephone is a four-wire system, so that normal two-wire indoor telephone wiring cannot be used.

[Means for solving problems]

According to the present invention, in the button telephone device comprising a main device, a telephone, and an interface connecting the main device and the telephone, the main device includes a filter for superimposing power to the telephone on the interface. and a filter for extracting power from the interface;
Filter and input for extracting a data signal and connecting it to the interface [Embodiment] Next, a practical example of the present invention will be described with reference to the drawings.

The drawing is a block diagram showing one embodiment of the present invention.

The main device 1 and the plurality of telephones 2 are connected through an interface 3 to form a button magnetic phone device. In the drawing, only one telephone 2 is shown.

The main device 1 is connected to the telephone line 4, includes a filter 5, a data signal transmitting/receiving section 6, a filter 7, a power supply section 8, and a filter 9, and is connected to the interface 3 via the filter 5°7.9. .

The telephone set 2 is composed of a communication section 10 for forming a voice communication path, a filter 11, data signal transmitting/receiving sections 111 and 12, a filter 13, a power supply section 14, and a filter 15.

When the earthenware f1 supplies power to the telephone 2, the output of the power supply unit 8 is filtered by a filter 9 to cut off the alternating current, and the direct current is superimposed on the interface 3.

In the telephone set 2, power is supplied to the i source section 14 to generate the operation tg, while preventing the influence of other signals by the filter 15.

When the telephone set 2 makes a call via the telephone line /N4, the signal received from the telephone line 4 is converted into a frequency within the voice band by the filter 5 and is connected to the interface 3. A speech line switching network (not shown) is connected to the second speech line side of the filter 5. The telephone 2 uses a filter 11 to extract only the voice frequency from the signal from the interface 3 and sends it to the communication section 10. Further, the telephone call is bidirectional, and the voice signal from the telephone section 10 of the telephone 2 is similarly sent to the telephone line 4 via the filter 11, the interface 3, and the filter 5 within the voice band.

When transmitting and receiving data between the main device 1 and the telephone 2, the data is modulated from the data transmitting/receiving section 6 of the main device 1 to a frequency different from the voice band frequency in the filter 7 and sent to the interface 3. In the telephone set 2, only the data signal is extracted from the 16 signals received from the interface 3 by the filter 13 and sent to the data 1N signal transmitting/receiving section 12. Data also flows in both directions, and data from the data signal reverse receiving section 12 of the telephone 2' is similarly sent to the data signal transmitting/receiving section 6 via the filter 13, interface 3, and filter 7. The data to be transmitted is divided into frames,
Each frame has a data transmission period from the main device 1 to the telephone 2 and a data transmission period from the telephone 2 to the main device 1. The data sent from the data signal transmitting/receiving section 6 of the main device 1 to the telephone 2 includes call, hold, lamp control data, etc., and when the data signal transmitting/receiving section 12 of the telephone 2 receives these data, a ring tone is generated. Occurrence, the lamp display is done. Further, the data sent from the telephone 2 to the main device 1 includes various push button data, etc., and when the data is received by the data signal transmitting/receiving section 6 of the main device 1, control is performed according to each data.

〔Effect of the invention〕

As explained above, the present invention converts the communication line to AC and superimposes the frequency-divided data signal and the DC power supply.
By connecting the main device and the telephone with 4M, it is possible to install a button'1 talk device using a normal indoor talk line.

[Brief explanation of the drawing]

The figure is a block diagram of an embodiment of the invention. ■...Main device, 2...Telephone, 3...
...Interface, 4...Telephone line, 5
, 7 , 9 , 11, 13° 15... Filter, 6, 12... Data signal transmitting/receiving section, 8,
14... Power supply section, 10... Call section. −6=

Claims (1)

[Claims] A button telephone device comprising a main device, a telephone, and an interface connecting the main device and the telephone, wherein the main device includes a filter for superimposing power to the telephone on the interface. a filter connected to the interface to frequency-divide a data signal; and a filter to extract a signal from a telephone line within the voice band and send it to the interface, and the telephone receives power from the interface. A button telephone device comprising: a filter for extracting a data signal; a filter for extracting a data signal and connecting it to the interface; and a filter connecting to the interface for extracting a voice band of a call signal.