KR930009849B1 - Memorized phone number displaying and automatic dialing method - Google Patents

Abstract

The multifunctional telephone for storing received dial digits during absence includes a communication controller for connecting a station to a communication circuit, a DTMF receiver for converting a DTMF dial signal into binary data, a voice mixing circuit for voice-mixing an input vocal instruction message data, a display for displaying telephone numbers, and a microprocessor having a built-in memory so that a control signal is generated for every ring detection signal. The voice mixing circuit operates whenever the communication circuit is connected to the station, dialing signals are sequentially stored, the stored dialing signals are sequentially displayed on the display, the control signal is output in response to a service key, and a dialing signal selected is transmitted to the station, thereby automatically storing and dialing telephone numbers.

Description

Telephone apparatus for storing incoming dial digits in absence and control method thereof

1 is a circuit diagram of a telephone apparatus according to the present invention.

2a and 2b show a control flow according to the invention.

* Explanation of symbols for main parts of the drawings

10: rectifier 24: call control circuit

26: call circuit 28: DTMF receiver

30: microprocessor 32: voice synthesis circuit

34: indicator 36: key input circuit

38 memory 40 ringer circuit

42 ring detection circuit 44 ring detection alarm unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic answering telephone apparatus having a multifunction, and more particularly, to a telephone apparatus for automatically storing a dial digit input from the outside by automatically answering a call in absence using a memory integrated circuit and a control method thereof.

Conventional multifunction telephone devices include a speed dialing function, an on-hook dialing function, a redialing function, and many other functions. Among the many functions, the speed dial function stores a telephone number frequently used by the user in the internal memory of the telephone apparatus and, when calling a specific person, lifts the handset or presses the on-hook switch to form a call circuit. By pressing a specific key, for example, a location key, the phone number stored in the location is transmitted. The above-mentioned multifunction telephone apparatus only dials a telephone number already stored in a specific area corresponding to a location key, and cannot store a dial signal received from the outside. Therefore, the multifunctional telephone apparatus as described above cannot answer the incoming call when the user is absent and can not display where the call came from.

On the other hand, an automatic answering device that automatically responds to an external call while away from the office and responds automatically, and records the message of the other party when the automatic answering device or automatic answering device which records the message of the calling party is not recorded. Based on the message, I could find out where the call came from, but not the other party's phone number. In addition, even though the phone number of the other party is recognized, there has been a problem that the user must manually dial.

Accordingly, an object of the present invention is to provide a telephone apparatus and a control method in a telephone apparatus having a microprocessor, which automatically answer a telephone call received when a user is absent and store a dialing digit received from the outside in a memory set therein.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a circuit diagram of a multifunction telephone apparatus according to the present invention, which includes a rectifier 10 for polarizing and outputting a trunk line voltage input from a trunk line terminal (T) (R), and the trunk line terminal (T) (R). A ringer circuit 40 for detecting an input ring signal and outputting the input ring signal as an audible sound through a speaker SP, and a ring detection circuit 42 for detecting the ring signal and outputting a ring detection signal. A key input circuit 36 having a ring detection alarm section 44, a dial digit key and an auto answer service key in the absence and generating a signal by pressing the key, and an input signal of the key input circuit 36. A microprocessor unit (hereinafter referred to as MPU) 30 which analyzes by a built-in program and outputs a missed answering service function signal, a call control signal and a DTMF signal (MFC), and outputs the same from the MPU 30. By the call control signal A call control circuit 24 having a call control circuit 24 for interfacing a trunk line terminal T and a call circuit 26 to be described later, and a handset transceiver. (R) connected to form a path of the current of the trunk line voltage supplied from the call control circuit 24 to form a communication path and outputs the MFC (Multi Frequency Code) signal output from the MPU (30) DTMF receiver 28 for converting a DTMF signal received through the communication circuit 26 and the communication circuit 26 into a binary code for storing data in the memory 38 built in the MPU 30. A voice synthesis circuit 32 connected between the MPU 30 and a transmission signal input terminal of the call circuit 26, for synthesizing and outputting the missed voice message output from the MPU 30; A voice synthesis circuit 32 output from the MPU 30 and a display output from the MPU 30. It consists of the indicator 34 which displays data.

The MPU 30 in the above configuration has a memory 38 capable of storing a plurality of telephone numbers therein, and has a built-in DTMF generator for generating MFC corresponding to an input digit. The MPU 30 may use a chip such as HD-404608 that is currently used for general purposes.

2A and 2B are control flow diagrams relating to an automatic dialing method by storing and displaying the absence telephone number according to the present invention. FIG. 2A is a control process for storing dialing digits inputted from the outside in an internal storage area when absent, and FIG. 2B sequentially displays the dialing digits already stored by input of a predetermined function key, and displays the displayed keys. It is a control flowchart of the dialing which is sent automatically by the input of.

2a or 1st Servisky, for example, if the function key is set out, after entering the service mode of absent, and determines whether the incoming ring detection signal input to form a call circuit, and stores the telephone number entered, The dialing digit memory address is increased by input of the dialing end key.

Then, in response to the input of the second service key, e.g., the telephone number confirmation key, the address of the telephone number storage area is designated to display the telephone number stored therein, and the third service key, i.e., the dial transmission key. And automatically dialing the displayed telephone number in response to the input of.

An operation example will be described below with reference to the configuration of FIG. 1 and the flowcharts of FIGS. 2A and 2B described above.

The MPU 30 in the configuration of FIG. 1 is a microprocessor for performing the flowcharts of FIGS. 2A and 2B, and the MPU 30 performs an operation related to the control of the multifunction telephone apparatus at predetermined intervals. That is, the MPU 30 searches whether the outgoing key function key is input in step 2a of FIG. 100 every predetermined period. When the out-going function key is not input while the MPU 30 performs step 100 of FIG. 2A, the MPU 30 searches whether the second sub-biskey * is input in step 116 of FIG. 2B. do. That is, it is searched whether a telephone number confirmation key is input. If it is determined in step 116 that the second service key is not input, the MPU 30 jumps to step 118 to perform service of the corresponding key.

When the outgoing function key is input in a state in which the above operation is repeatedly performed at a predetermined cycle, the MPU 30 performs process of FIG. 102 to perform a function of automatically saving a phone number according to the present invention. That is, when the out function key is input, the MPU 30 periodically checks the ring detection signal input port in step 2102 to check whether the ring signal is input through the trunk line terminal T or R. Will be checked. In the above state, when an external caller calls the telephone apparatus configured as the first diagram, and a signal of a ring of 20 Hz transmitted from the trunk line is input to the trunk line terminal T, the ringer circuit 40 receives the received signal. The ring signal is converted into an audible signal and output, and the ring detection circuit 42 detects the ring signal and inputs it to the ring signal detection signal input port of the MPU 30.

When the ring detection signal is input to the MPU 30, the MPU 30 determines that the ring signal is detected in FIG. 102 and performs a function of accessing a call and transmitting a voice signal in step 104. That is, the MPU 30 recognizes that the call has been made in step 2102 and inputs a call control signal to the call control circuit 24 to form a call path in step 104.

When a call control signal for forming a call from the MPU 30 is input to the base of the transistor 16 of the call control circuit 24, the transistor 16 is turned on and the transistor 14 is also turned on. (ON) to form a currency path. When the call path is configured by the operation of the call control circuit 24 as described above, the MPU 30 outputs the missed voice guidance message data stored in the internal memory area to the voice synthesis circuit 32 and the DTMF receiver in step 106. Search for the output of 28). In other words, it is searched whether a DTMF signal is detected. At this time, the voice synthesis circuit 32 synthesizes the voice guidance message data to inform the counterpart via the call circuit 26 of the analog voice signal indicating that the user is absent. (The missed announcement message data here may be a message that the user is absent and a phone number is input by using the dial button.)

Therefore, the other party hears the missed guidance message output from the voice synthesis circuit 32 and inputs a digit corresponding to his / her phone number by using the keypad. As described above, when the other party dials his / her own phone number by pressing the keypad, a DTMF signal is sent from the other party's telephone apparatus (if the other party is a DTMF phone), and the DTMF dial signal sent from the other party is a call control circuit. It is input to the communication circuit 26 through the emitter-collector of the transistor 14 of (24). At this time, the telephone circuit 26 amplifies the input DTMF signal through an internal amplifier and inputs it to the DTMF receiver 28 connected to the line of the speaker SPK.

The DTMF receiver 28 converts the input DTMF signal into a binary code and inputs it to the 4-bit data MPU 30. Such a DTMF receiver 28 can use a one-chip DTMF receiver or a DTMF decoder that is currently used universally.

Accordingly, the MPU 30 performing step 106 of FIG. 2A determines that the DTMF signal is detected by the output of the DTMF receiver 28. The MPU 30 that determines that the DTMF signal has been input in step 106 stores the dialing digit data received through the DTMF receiver 28 in the internal memory 38 in step 108 of FIG. 2A. The storage of the dialing digits in the internal memory 38 is stored in increasing order from the initial address. If it is determined in step 106 that the DTMF signal is not detected, the MPU 30 determines that the dialing digit is not output from the counterpart, and controls the call control circuit 24 to block the call path in step 114. do.

The MPU 30 storing the dialing digit received in the storage area set in step 108 detects whether a dial ending key (eg, a "#" key) is input in step 110.

If the dial end key is not input in step 110, the MPU 30 repeats from step 106. When the other party presses the "#" key after the other party finishes dialing his / her phone number in the above-described state, the DTMF signal corresponding to the "#" key is input to the DTMF receiver 28 through the above-described path. The DTMF receiver 28 converts the 4-bit digital data into 4-bit digital data and inputs the same to the MPU 30. In this case, the MPU 30 performing step 110 of FIG. 2A determines that the dial end key is input, and in step 112, increases the address of the internal memory 38 by +1 and blocks the call path. The reason for increasing the internal address by +1 is to store a dialing digit input from the outside next.

Therefore, when a user makes a call from the outside with the function key set out, the telephone apparatus of FIG. 1 according to the present invention automatically responds to an external call and automatically sends a missed guidance message and responds to the auto answer message. It can be seen that the dialing digits transmitted by the caller of the other party are sequentially stored in the internal memory 38. The storing operation of the dialing digit as described above is performed up to address nFF (FFH), which is the maximum storage area of the internal memory 38, until the user releases the missed service key.

On the other hand, when the user who has set the outing function key returns home and releases the outing function key, the MPU 30 performing the flowchart of FIG. 2a determines that the outing function key is not input in the process of FIG. Jump to step 116. "#" Key (in the present invention) set in order to confirm the call state from the outside in the above operating state and to confirm the second service key, e.g. telephone number, set in the key input circuit 36. Is input to confirm the stored dial. The MPU 30 determines that the telephone number confirmation key (*) has been input in step 116 of FIG. 2B.

In step 116 of FIG. 2B, the MPU 30 that determines that the phone number confirmation key has been input recognizes that the user wants to confirm the stored phone number, and in step 2B 120, read address of the internal memory 38 is read. (In the initial state, the memory lead address is “0” address). In step 122, the MPU 30 that designates the address stores the telephone number stored in the designated address of the internal memory 38 in step 122. FIG. It reads and outputs to the display 24, and it is searched in step 124 whether a 3rd Servisky, for example, a dial transmitter # is input.

Thus, the indicator 34 displays the display data output from the MPU 30.

At this time, if the user continues to press the telephone number confirmation key (*), the MPU 30 determines that the dial transmission key (#) is not input in step 124 and jumps to step 116 described above.

In this state, the user continuously presses the telephone number confirmation key 8, so that the MPU 30 repeats the above-described steps 116 to 122 to increase the address of the internal memory 38 and store it in the next storage area. The telephone number is accessed and displayed on the display 34.

At this time, the MPU 30 searches the input state of the telephone number verification key (*) and increases the address of the internal memory 38, so that when the telephone number verification key (*) is continuously inputted, The telephone numbers stored from the second address to the nth address are sequentially displayed on the display 34.

If one of the telephone numbers displayed on the display 34 by the above operation is a number to call the other party, pressing the dial dispensing key (#) provided in the key input circuit 36 causes the display unit 34 to display. The displayed phone number is sent to the other party. That is, when the user presses the dial dispensing key (#) installed in the key input circuit 36, the MPU 30 detects an input by the dial dispensing key # in step 2124 of FIG. Be aware to send the number. In step 124, the MPU 30 that determines that the dial transmission key (#) has been inputted transmits the transistor 6 of the call control circuit 24 to perform the function of transmitting a phone number and storing the telephone number in step 2b of FIG. A logic "high" signal is applied to the base of < Desc / Clms Page number 5 > and the telephone number digits displayed on the internal DTMF generator are written, and the DTMF of the displayed telephone number is output as a dial signal. At this time, the transistor 16 is "on" to form a communication path, and the telephone number MFC output from the MPU 30 is transmitted to the other party through the talker in the communication circuit 26.

Therefore, by the above operation, a plurality of telephone numbers stored in the internal memory 38 of the MPU 30 are sequentially accessed and displayed, and the displayed telephone numbers are automatically transmitted by one-touch operation.

As described above, the present invention allows a multifunction telephone apparatus with a microprocessor to transmit a voice signal indicating that the user is not in response to an external call, and the telephone number transmitted from the other party by the missed voice message is transmitted by the DTMF receiver. The phone number can be memorized automatically by converting it into a binary code and memorizing it, and the user can return to the phone when they go out, display the memorized phone number, and automatically dial the displayed phone number for the user's convenience. At the same time, there is an advantage in that the multifunctional telephone apparatus can be advanced.

Claims (3)

A ring detection circuit for detecting a ring signal to a trunk line, a call circuit for converting a voice signal into an electrical signal and an audio signal to a voice signal, and a first, second and third service key for dialing a telephone number. A multifunction telephone apparatus having a key input circuit, comprising: a call control circuit connected between the trunk line and the call circuit and connecting the trunk line to the call circuit in response to an input of a control signal; DTMF receiver which converts and outputs DTMF dial signal transmitted and received from CO line into binary data, and synthesizes voice guidance message data inputted to transmit analog voice signal to CO line through the communication circuit. A voice synthesis circuit, a display for displaying a telephone number, and a memory therein, the ring gum in response to the first survivsky The memory area is generated every time a signal is input, the voice synthesis circuit is activated whenever the call circuit is connected to a trunk line in response to the control signal, and the memory area allocated to the respective dialing signals in the received order. And sequentially dial the stored dialing signals to the indicator when the second service key is operated, and output the control signal in response to the operation of the third service key. And a microprocessor for transmitting a dialing signal corresponding to the telephone number selected in the display to the trunk line while being connected. A ring detection circuit for detecting a ring signal from the trunk line, a call control circuit for forming a communication path with the trunk line under predetermined control, a call circuit connected to the call control circuit, for transmitting and receiving a voice signal, and Is absent in a multifunction telephone apparatus having a DTMF receiver for converting a DTMF signal to a binary number, a voice synthesis circuit for synthesizing a digital voice message and outputting it through the call circuit, and a microprocessor with a built-in memory to control each unit. A method for storing a received dial digit, the method comprising: a ring signal detection process for searching whether a ring signal detection signal has been detected in response to an input of an outgoing function key, and a call path when determining that a ring signal has been detected in the ring signal detection process; The process of sending the missed message to form and send the missed message, and the binary of the DTMF input after the message is sent. A method for storing an incoming dial digit in absence in a multifunction telephone apparatus, characterized by storing an input dial signal in which a code is stored in an internal memory until a dial end key is input. The method of claim 2, wherein the storing of the dial signal comprises: a DTMF signal detection search process for searching whether a DTMF signal is detected, and a call path is blocked when it is determined that the DTMF signal is not detected as a result of the DTMF signal detection process; A phone number storing step of storing a dial digit of the input DTMF in an internal memory area upon determining that the signal is detected; and a dial end key detection searching step of searching whether a dialing end key has been detected after the storing process is completed; When the dial-end key detection search determines that the dial-end key is not detected, the terminal jumps to the DTMF detection search process, and if it is detected, the memory address allocation process is performed to increase the memory address. How to store dial digits.