KR0127248Y1 - Telephone with a self-diagnosis function - Google Patents

Abstract

The present invention relates to a phone configured to diagnose the operation of the DTMF (Dual Tone Multi-Frequency) generating circuit, which is a major component of the phone, and to display the diagnosis result so that the user can know. A microprocessor serving as a control unit for controlling the overall device based on a key input applied through the keypad, and a predetermined control command from the microprocessor. A telephone having a DTMF generation circuit for generating a DTMF signal corresponding to a key input; A function selection key for selecting a self-diagnosis function, a switching unit for switching switching the output direction of the DTMF signal output from the DTMF generation circuit in accordance with a predetermined control signal from the microprocessor, and the DTMF switched by the switching unit. And a DTMF receiving circuit for receiving a signal and outputting a contracted code signal corresponding thereto, wherein the microprocessor contracts to the DTMF generating circuit when the user selects a self-diagnostic function by pressing the function selection key. It is characterized in that the operation of the DTMF generating circuit is simplified based on a code signal outputting a predetermined code signal and thus input through the DTMF receiving circuit.

Description

Self-diagnosis phone

1 is a block diagram showing the internal configuration of a general telephone with a built-in microprocessor.

2 is a functional block diagram showing the internal configuration of a telephone with a self-diagnostic function according to an embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

A: Phone B: Extended Memory

1: trunk line connection terminal 2: ring signal detection unit

3: ring generator 4: loop circuit

5: handset 6: call path connection

7: network circuit 8: hook detection unit

10: display unit 11: memory

12,120: microprocessor 13,130: keypad

14: DTMF (Dual Tone Multi-Frequency) Generation Circuit

20: switching unit 21: DTMF receiving circuit

41: trunk line connection detection unit 42: interface circuit

51: the receiver 52: the receiver

101: light emitting display portion 102: display driver

The present invention relates to a telephone having a self-diagnosis function. In particular, the telephone is designed to diagnose whether the DTMF (Dual Tone Multi-Frequency) generating circuit, which is a major component of the telephone, is operating normally, and to display the diagnosis result so that the user can know. It is about.

The telephones, which are widely used throughout our living spaces, including homes and businesses, are the most basic necessities of modern people in the information age. Recently, the telephone function as a simple call device has been provided for this role. Increasingly, a variety of convenient functions have been added.

1 is a block diagram showing the internal structure of a general telephone with a built-in microprocessor. In the drawing, reference numeral 1 is a connection terminal for connecting an external trunk line, and reference number 2 is a talker through this trunk line connection terminal (1). A ring signal detecting unit for detecting a ring signal applied from the side station apparatus, 3 is a ring generating unit for outputting a telephone ringing to the receiver side based on the applied ring signal, 4 is a counterpart terminal (hereinafter referred to as a power station). "LOOP" circuit that performs the interface function of the entire communication signal input and output to and from the device, and the loop circuit 4 is a trunk line connection detecting unit for detecting a connection state with a large station. And an interface circuit 42 for performing an interface function of the signal between the device 41 and the device.

Further, reference numeral 5 denotes a handset, and 8 denotes a hook for detecting an on or off state of a hook switch that is configured to be turned on / off when a user lifts or releases the telephone 5. HOOK) detection unit 6 is a call path connection unit for controlling whether or not to connect to the call path in accordance with a control signal from the microprocessor 12 to be described later.

Reference numeral 12 is a microprocessor for controlling the overall operation of the device based on the signal detected through the communication line connection unit 6 and the trunk line connection detection unit 41, and the like when the user lifts the handset 5 It detects through the hook detection unit 8 to form a loop by driving the communication path connection unit ON.

On the other hand, reference numeral 7 amplifies the voice signal of the sender applied from the power station and the user's voice signal applied from the handset 5 through the interface circuit 42 and the communication path connecting unit 6 to a predetermined level, as well as side sound. A network circuit for performing signal processing for side tone, etc., 10 is a display unit for informing a user of a current operation state of a telephone, and 11 is a memory for storing data necessary for operation of the telephone.

Reference numeral 13 denotes a keypad provided with numeric keys and function keys used for dialing or selecting a specific function by the user, and 14 denotes a microprocessor 12 for a predetermined key input entered through the keypad 13. The DTMF generation circuit outputs a DTMF (Dual Tone Multi-Frequency) signal corresponding to the control command.

That is, in the conventional general telephone having the above-described configuration, as the user presses a numeric key installed on the keypad 13 while holding the handset 5, the microprocessor 12 drives the DTMF generating circuit 14. On the contrary, when a call is received, the user picks up the handset 5 and turns on a hook switch (not shown). Thus, the microprocessor 120 that detects the handset 5 is connected to the call path. By controlling the driving), a series of loops are formed between the user and the other party's correspondent, and at the same time, the call is available.

On the other hand, the DTMF (Dual Tone Multi-Frequency) signal output from the DTMF generation circuit 14 is a kind of complex frequency signal generated in response to the key input selected by the user. If the circuit itself is old or damaged by an electric shock, the receiver is not connected to the dialed number of the dialed number, or the wrong operation is different from the selected function. There is a possibility that the entire apparatus is malfunctioned, such as being executed.

The present invention was devised in view of the above circumstances, and the self-diagnosis function was designed to diagnose whether the DTMF (Dual Tone Multi-Frequency) generating circuit, which is a major component of the telephone, is operating normally, and to display the diagnosis result so that the user can know. The purpose is to provide a telephone equipped with.

A telephone having a self-diagnostic function according to the present invention for realizing the above object is provided with a key input means provided with a numeric key and a function key which are used for a user to dial or select a specific function, and is applied through the key input means. A telephone having a control unit for controlling the entire apparatus based on a key input, and a DTMF generating circuit for generating a DTMF signal corresponding to a key input of a user according to a predetermined control command from the control unit; A function selection means for selecting a self-diagnosis function, a switching unit for switching the output direction of the DTMF signal output from the DTMF generation circuit in accordance with a predetermined control signal from the control unit, and a DTMF signal switched by the switching unit. And a DTMF receiving circuit for outputting a corresponding code signal corresponding thereto, wherein the controller outputs a predetermined code signal contracted to the DTMF generating circuit side when the self-diagnosis function is selected through the function selecting means. Accordingly, the operation of the DTMF generating circuit is diagnosed based on a code signal input through the DTMF receiving circuit.

That is, according to the present invention having the above-described configuration, the phone itself can diagnose the operation state of the DTMF generation circuit as well as display the diagnosis result, so that the user can easily recognize whether the device is abnormal.

Hereinafter, with reference to the accompanying drawings will be described an embodiment according to the present invention.

2 is a block diagram showing the internal structure of a telephone with a self-diagnosis function according to an embodiment of the present invention, the same reference numerals are assigned to components that perform the same functions as those shown in FIG. The description will be omitted.

In FIG. 2, reference numeral 130 denotes a keypad provided with a function selection key (not shown) for selecting a self-diagnostic function, and 120 denotes a controller for controlling the entire apparatus based on a signal input through the keypad 130. The microprocessor 20 is a switching unit for switching the output direction of the DTMF signal output from the DTMF generation circuit 14 in accordance with a predetermined control signal from the microprocessor 120, and 21 is a switching unit 20. It is a DTMF receiving circuit that receives a DTMF signal that is output by switching and outputs a contracted code signal corresponding thereto.

Next, the operation of the device having the above configuration will be described.

When the user presses a function selection key (not shown) installed in the keypad 130, the microprocessor 120 displays that the function selection key for self-diagnosis is pressed through the display unit 10. The switching unit 20 is controlled to switch the signal output direction of the DTMF generating circuit 14 to the DTMF receiving circuit 21 side.

Thereafter, the microprocessor 12 has a code corresponding to each numeric key toward the DTMF generating circuit 14 in the same way as when the ten numeric keys 10-key provided on the keypad 130 are sequentially pressed by the user. Since the signal is output at regular time intervals, the DTMF signal generated based on this is output from the DTMF generation circuit 14.

The signal output from the DTMF generating circuit 14 is input to the DTMF receiving circuit 21 via the switching unit 20, and the DTMF receiving circuit 21 is inversely converted into a code signal corresponding to each of the bars. The microprocessor 120 diagnoses an operation state of the DTMF generation circuit 14 based on whether the code signal inputted after being inversely converted by the above process is correct.

On the other hand, if the correct code signal is input as a result of the diagnosis, the display unit 10 outputs a 'CORRECT' message indicating that the operation state is normal, and if an incorrect code signal is applied, an 'ERR' message indicating that it is abnormal. Will print.

That is, according to the above embodiment, the DTMF (Dual Tone Multi-Frequency) generating circuit, which is a main component of the telephone, can be diagnosed by itself, and a diagnosis result can be displayed so that the user can know the DTMF generation. It is easy to check whether the circuit is operating normally.

On the other hand, the present invention is not limited to the above embodiments and can be variously modified within the scope not departing from the technical gist of the present invention.

Claims (2)

A key input means provided with numeric keys and function keys used for dialing a user or selecting a specific function, a control unit for controlling the entire apparatus based on a key input applied through the key input unit, and from the control unit. A telephone having a DTMF generation circuit for generating a DTMF signal corresponding to a key input of a user according to a predetermined control command; A function selection means for selecting a self-diagnosis function, a switching unit for switching the output direction of the DTMF signal output from the DTMF generation circuit in accordance with a predetermined control signal from the control unit, and a DTMF signal switched by the switching unit. And a DTMF reception circuit for outputting a contracted code signal corresponding thereto, wherein the controller outputs a predetermined code signal contracted to the DTMF generating circuit side when the self-diagnosis function is selected through the function selection means. And thereby diagnosing the operation of the DTMF generating circuit based on a code signal input through the DTMF receiving circuit. The phone with a self-diagnosis function according to claim 1, further comprising a display unit for displaying a diagnosis result for the DTMF generation circuit in accordance with a predetermined control signal output from the control unit.