JPH0433444A - Multi-function telephone set - Google Patents

Abstract

PURPOSE:To avoid any hindrance in a basic talking even when a power supply for a microcomputer is not supplied to the microcomputer by allowing a dialer IC energized from a telephone line to control the basic operation of a telephone set. CONSTITUTION:A dialer IC1 energized from a telephone line L and a microcomputer data bus 6 are inserted between a keyboard data bus 5 and a microcomputer 3, and the microcomputer 3 is not provided with a dialer section. The dialer IC1 receives an input signal from a keyboard and is energized from the telephone line in this way. Even when a power supply is not supplied to the microcomputer, a multi-function telephone set having a basic telephone function is realized.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to multifunction telephones.

[Conventional technology]

As telephones have recently become more multi-functional, it has become necessary to control various additional functions in addition to basic telephone functions.

A microcomputer (hereinafter referred to as microcomputer) is generally used as this control circuit.

FIG. 3 is a block diagram of an example of a conventional multifunction telephone.

The multifunction telephone connects a matrix type keyboard 2 to a microcomputer 3 via a keyboard data bus 4. is connected to.

Microcomputer 3. is supplied with power from a four-way power source for the microcomputer, and has a dialer part 3b for controlling basic telephone functions inside.

[Problem to be solved by the invention]

In the conventional multi-function telephone mentioned above, all functions are controlled by a microcomputer, so if the stable power supply to the microcomputer is cut off due to an accident, the basic dialer part of the microcomputer controls the The drawback was that it did not function as a telephone.

An object of the present invention is to provide a multifunction telephone that has basic telephone functions even without power supply for a microcomputer.

[Means to solve the problem]

The multifunction telephone of the present invention includes a keyboard, a dialer IC that receives input signals from the keyboard and is supplied with power from a telephone line, and a microcomputer for controlling additional functions that is connected to the dialer IC via a data bus. Adds data on key press and key release to the input signal of the multi-function telephone, outputs two data of key press and key release to the microcomputer in response to one key input, and then The device operates by receiving key press and key release data again through the microcomputer.

〔Example〕

The present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention.

The multi-function telephone has a keyboard data bus 5 and a microcomputer 3 as shown in FIG. It is similar to a conventional multifunction telephone except for the fact that a dialer IC and a microcomputer data bus 6, which are supplied with power from a telephone line, are inserted between the telephone line and the telephone line.

The microcomputer 3 is part of the dialer 3. does not have.

FIG. 2 is a flowchart for explaining the operation of the blocks in FIG. 1.

First, the dialer ICI is a matrix type keyboard 2
It confirms that a key has been input, decodes which key's signal was input, adds key press data to the data, and sends the data to the microcomputer 3.

Microcomputer 3 uses the key-input data to the dialer IC.
If the data should be sent to ICI, it is sent back to dialer ICI as is.

The dialer ICI checks the data sent back again and
If it is tone signal output data, tone signal output is started.

Next, when the key that was being input from the keyboard is released, the dialer IC 1 sends data to the microcomputer 3 to which key release data has been added.

The microcomputer side sends it back to the dialer ICI in the same way as when a key is pressed.

The dialer ICI stops outputting the tone signal upon receiving the returned data.

〔Effect of the invention〕

As explained above, the present invention provides control of the basic operations of the telephone using a dialer I which is supplied with power from the telephone line.
Since the communication is carried out using C, there is an effect that there is no problem in basic communication even if the microcomputer is not supplied with power for the microcomputer.

FIG. 2 is an example block diagram.

1... Dialer IC12... Matrix type keyboard, 3... Microcomputer, 4... Power supply for microcomputer, 5... Keyboard data bus, 6...
Microcomputer data bus, L...telephone line.

Agent Patent Attorney Susumu Uchihara

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a block diagram of an embodiment of the present invention.
A flowchart to explain the operation of the blocks in the figure,
Figure 3 shows the -t? of a conventional multi-function telephone. figure

Claims (1)

[Claims] A multi-function telephone has a keyboard, a dialer IC that receives input signals from the keyboard and is supplied with power from a telephone line, and a microcomputer for controlling additional functions connected to the dialer IC via a data bus. The data when the key is pressed and when the key is released are added to the data, and the two data of the key press and the key release are output to the microcomputer in response to one key input, and then the key is sent to the microcomputer via the microcomputer. A multi-function telephone characterized in that it operates by receiving data on presses and key releases again.