KR970002345B1 - Re-dialing apparatus - Google Patents

Abstract

The device selectively redialing a dial digit pretransmitted in a communication terminal, which has a telephone line, a transceiver reproducing an alternating current AC signal carried in a communication voltage of the telephone line and superposing the AC signal to the communication voltage to output it, and a communication path controller connecting the telephone line and the AC signal transceiver in response of a communication path control signal to form a communication path, is comprised of: storing unit having at least one or more areas storing a dial digit signal for calling the other party; an index counter indicating a storing position of the storing unit, increasing a value of the storing position in response of the dial transmission; a dial signal transmitter generating a dialing signal corresponding to dial digit to be input to transmit it to the telephone line; and a controller storing dial digit to be input to the position of the storing unit indicated by the index counter and at the same time, providing it to the dial signal transmitter, reducing a value of the index counter correspondingly with input number of times of repeat dial signal, accessing the dial digit stored in the storing area corresponding to the value of the reduced index counter to display it, and supplying the displayed dial digit to the dial digit transmitter in response to an input of the transmission signal.

Description

Selective redialing device and method of dial digit

1 is a hardware block diagram of a communication terminal for carrying out the present invention.

2A and 2B illustrate the configuration of a memory for selective re-dialing in accordance with the present invention.

3 is a transmission dial storage control flow chart according to the present invention.

4 is a selective re-dialing transmission control flow chart according to the present invention.

* Explanation of symbols for main parts of the drawings

12: telephone line 14: rectifier circuit

16: call circuit unit 18: call path control unit

20: DTMF-S 22: CPU

24: keypad 26: memory

The present invention relates to a method for controlling dialing of a communication terminal, and more particularly, to an apparatus and method for selective redialing of a dialed dial digit for controlling the dialing of a desired counterpart among a plurality of dials previously sent. .

Typically, communication terminals having a dial-out function, for example, a modem, a facsimile, a multifunction telephone, and a regular telephone function have a re-dial key. When the re-dial key installed in the telephone terminal is pressed, the dial digits sent before the hook-on are resent to the telephone line. The conventional telephone terminal device for this function has a dial buffer for storing the dial digits that were finally sent, and the dial digits stored in the dial buffer are normally accessed and sent out by the input of a re-dial key. The dial buffer is most often embedded in a one-chip dialer that generates a dial signal corresponding to the dial digit (for example, a dial tone in DTMF (dual tone multi-frequency) or pulse form). It is common. In addition to this method, the present invention is used in a method of transmitting a phone number of a counterpart in a memory area in advance with a locator key (location key of a memory for storing a phone number of a party to be frequently called).

However, the former method of the dial transmission control method as described above causes a case in which the final dispatch dial-1st dial is generated by re-bending only the dial that was finally sent, and an inconvenience of having to dial manually manually occurs. In addition, the latter transmission method requires the installation of a large number of locating keys (keys for setting an address for storing the phone number of the other party), so that the keypad cannot be made compact. It is constrained to design by size.

Accordingly, an object of the present invention is to cyclically store at least one dialed signal dialed to call a counterpart, and to display and selectively transmit the cyclically stored dialing signal in response to an input of a repetitive dial key. In providing a method.

Another object of the present invention is to provide a method for automatically storing a dial digit dialed to call a counterpart in a circular storage area.

It is still another object of the present invention to provide a method for selectively dialing at least one dial digit among a plurality of dial digits stored in a circular storage area in response to an input of a repeat dial key.

The present invention for achieving the above object is a dial buffer having at least one area for storing a dial digit signal for calling the other party, an index counter for cyclically selecting a storage position of the dial buffer, and the dial buffer. And a temporary indesperger for reading the stored dial signal, and a dial signal transmitting means for generating a dialing signal corresponding to the digit signal output from the dial buffer and transmitting the dialing signal to the telephone line. The above-described index counter, temporary index buffer, dial signal transmitting means, etc. are controlled by control means for controlling the transmission of the dial in response to the input of the key signal, and the control means according to the values of the index counter and the temporary index buffer. Access dial digits to the dial buffer. The present invention having the above configuration stores dial digits input to a storage area of a dial buffer designated by the index counter in response to a key signal of a dial digit, and simultaneously controls the dial transmission signal sending means to transmit a dial signal. . In response to the repetitive dial signal being input each time, data of the dial buffer storage area in which the temporary index buffer having a value of -1 less than that of the index counter is stored is read and displayed. The displayed dial digit is sent as a dialing signal.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. An embodiment of the present invention to be described later will describe an operation using a dual tone multi-frequency sender (DTMF-S) for transmitting a dial signal corresponding to a digit in the form of digital data.

1 is a hardware block diagram of a communication terminal for carrying out the present invention. In the figure, reference numeral 22 is connected to the telephone line 12 and outputs a polarized alignment of the communication voltage (-48 volts) fed from a switch (not shown), and outputs a voice signal to the aligned voltage. The rectifier circuit 14 transmits the telephone line 12 to the telephone line 12. Reference number 16 reproduces the voice signal superimposed on the polarity-aligned communication voltage and outputs it to the line 32, and outputs the signal of the line 32 and the input voice band on the polarity-aligned communication voltage. It is a circuit part. Reference numeral 18 is a call path control unit which connects the rectifier circuit 12 and the call circuit unit 16 to form a call path in response to a call path control signal DP. Reference numeral 20 denotes a DTMF-S for transmitting a DTMF signal corresponding to an input of a dial digit through the call circuit unit 16. Then, 22 supplies a call control signal DP to the call path controller 18 in response to the hook-off, and supplies a dial digit corresponding to the input of a dial key to the DTMF-S 20 to make a call. The CPU controls the formation of the furnace and the dial transmission. Reference numeral 24 denotes a keypad connected to the CPU 22, which is provided with a 3x4 matrix key, a dial dispensing key, a repeat dial key, and the like, installed in a general telephone.

2A and 2B show the configuration of a memory for selective re-dialing according to the present invention, which is set in a memory 26 located inside the CPU 22 of FIG. In particular, FIG. 2A shows the structure of the dial buffer 29, which includes at least ten dial data areas for storing dial digits for calling a counterpart. In the figure, denoted by 29A to 29J is a dial data area. Each of the dial data areas 29A to 29J has a unique address, and stores or reads data at a designated position of the address. 2B shows an index counter 34 and a temporary index buffer 36 for designating the address of the dial buffer 29. The index counter 34 designates an address when storing the dial digits in the dial buffer 29, and the temporary index buffer 36 designates an address when reading the dial digits stored in the dial buffer 29. The operation of the index counter 34 and the temporary index buffer 36 will be more easily understood by the operation description below.

3 is a flow chart of the control of the transmission dial storage according to the present invention, which is a storage area of one of the dial data areas 29A to 29J of the dial buffer 29 designated by the index counter when a dial key provided on the keypad is input. The dial digit is sent out at the same time as the dial digit is stored, and the value of the index counter is increased. Such a control program is programmed in the ROM area of the memory 26 in the CPU 22 shown in FIG.

4 is a flow chart of a selective re-dialing transmission control according to the present invention, in which a dial digit stored in a dial data area of a dial buffer designated by a temporary index buffer having a value of 1 less than that of an index counter in response to input of a repetitive dialing signal is shown. Access and display. And in response to the input of the repetitive dial signal, the value of the temporary index buffer is decreased to display a previously stored dial digit, and the index signal corresponding to the displayed dial digit is transmitted to the telephone line in response to the input of the play key. I have a procedure. Such a program is also programmed in the ROM area of the memory 26 in the CPU 22 shown in FIG.

In the following description of the dial storage and repeat selection dialing operation according to the present invention in detail, it is assumed that the terminal of the hardware configured as shown in FIG. 1 is already hooked-off to form a call path. That is, the call path controller 18 supplies the call voltage output from the rectifier circuit 14 to the call circuit unit 16 in response to the call path formation control signal DP output from the CPU 22 to form the call loop. Assume a state.

Now, when the user selects the dial key installed on the keypad 24 in the above state, the selected dial key signal is input to the CPU 22. The CPU 22 performs the dial routine of FIG. 3 in response to the input of the dial key signal.

The CPU 22, which executes the dial sending routine by the input of the dial key, reads out the value stored in the index counter 34 set in the area of the internal memory 26 in step 42 of FIG. The CPU 22 compares the value of the read index counter 34 with a preset value in FIG. 44. Here, the preset value means the number of dial digit storage areas of the dial buffer 29, that is, the number of dial data areas 29A to 29J. In the present invention, an example set to 09H is shown.

In step 44, the value of the index counter 34 is determined to be equal to the preset value 09H. In step 46, the CPU 22 clears the value of the index counter 34 and performs step 48. If the value of the search result index counter 34 of step 44 is less than or equal to the preset value 09H, the process jumps to step 48 immediately. In step 48, the CPU 22 assigns the address of the dial data area 29A to 29J of the dial buffer 29 as shown in FIG. 2A as the value of the index counter 34 as shown in FIG. The dial digit input from (24) is stored.

For example, if the value of the index counter 34 is 03H, the CPU 22 uses the value 03H of the index counter 34 as an address to dial data area 29D of the dial buffer 29 as shown in FIG. ). The dial digit input from the keypad 24 is stored in the dial data area 29D of the dial buffer 29. By the above-described operation, the CPU 22 storing the dial digits in the dial data area 29D of the dial buffer 29 designated by the index counter 34 searches whether the storage is completed in FIG. To store the dial digit for calling one party.

When the dial digit output from the keypad 24 is completed at the address of the dial buffer 29 corresponding to the value of the index counter 34 by the steps 48 and 50, the CPU 22 stores the stored dial digit. Read in step 52 and outputs to the DTMF-F (20). At this time, the DTMF-S 20 generates a DTMF signal corresponding to the dial digit output from the CPU 22 and supplies it to the signal input terminal of the call circuit unit 20.

The call circuit unit 16 transmits the DTMF signal generated from the DTMF-F 20 to the telephone line 12 through a normal voice signal transmission route. That is, the call circuit unit 16 superimposes the input DTMF signal on the call current of the call voltage, and the phone line 12 through the line 30, the call path controller 18, the line 28, and the rectifier circuit 14. To be sent. The CPU 22 which sent the dial as described above increases the value of the index counter 34 configured as shown in FIG. 2B by +1 in step 54 of FIG. The reason why the value of the index counter 34 is increased in this way is to designate the next address of the dial buffer 29 when the next dial digit is input.

Therefore, when a new dialing is executed by the above operation, the dial digit input from the keypad 24 is the dial data corresponding to the value of the index counter 34 in the dial data areas 29A to 29J of the dial buffer 29. It can be seen that the index counter 34 for storing the next address is automatically stored in the area automatically. Therefore, it can be seen that the dial buffer 29 having the structure as shown in FIG. 2A automatically rotates and stores the dial digit input by the index counter 34. For example, if dialing is performed to call 10 counterparts, it can be seen that dial digits are input and stored in each of the dial data areas 29A to 29J of the dial buffer 29 configured as shown in FIG. 2A. .

By the above operation, when the user presses the repetitive dial key to call a counterpart who has previously dialed in the state in which at least one or more dial digits are stored in the dial buffer 29 configured as shown in FIG. 2A, the CPU 22 repeats the repetition. The routine of FIG. 4 is executed in response to the input of the dial key signal. The repeat dial key is provided on the keypad 24, and when selected by the user, the corresponding key signal is supplied to the CPU 22.

When performing FIG. 4 in response to the input of the repetitive dial key signal, the CPU 22 transfers and stores the value of the index counter 34 configured as 2b dialing to the temporary index buffer 36 in step 60 of FIG. do. The value of the index counter 34 indicates the address next to the address of the dial buffer 29 that stores the dial digit that was dialed last. Therefore, it can be seen that the value of the temporary indesbuffer 36 also indicates the position of the last dial + 1. In step 62, the CPU 22 searches whether the temporary index buffer 36 has a value of 0H. The reason for such a search is that the dial data storage areas of the dial buffer 29 are set to 10 (09H).

If the value of the current temporary index buffer 36 is not 0H in step 62, the CPU 22 assigns a read address of the dial buffer 29 to access the last dialed dial digit. Reduce the value of -1. If the value of the current temporary index buffer 36 is 0H in step 62, since the address where the last dialed dial digit is stored is 09H, the CPU 22 generates an address for reading the last dialed dial digit. In step 66, the temporary index buffer 36 is converted into 09H.

In step 64 or step 66, the CPU 22 decreases the value of the temporary index buffer 36 to store the dial digits stored in the dial data area of the dial buffer 29 corresponding to the address indicated by the temporary index buffer 36. Read and output to an indicator (not shown) to display the currently selected dial digit. For example, if the value of the temporary index buffer 36 is 03H, the CPU 22 reads out the dial digit stored in the data area 29D of the dial buffer 29 and displays it on the display.

In step 70, the CPU 22 searches whether the transmission key signal is output from the keypad 24. If it is determined in step 70 that the outgoing key signal is output, the CPU 22 accesses the dial digit stored in the dial data area 29D of the dial buffer 29 in step 72 and performs the above-described operation through the DTMF-S 20. Send by one path.

If it is determined in step 70 that the transmission key has not been input, the CPU 22 searches for the repetition dial key in step 74. In this case, if the repetitive dial key is input, the CPU 22 repeats the above-described step 68 by decreasing the value of the temporary index buffer 76 in step 76 to select the dial digit of the last dial-2. Therefore, when a repetitive dial key is input, one of the dial digits stored in the data areas 29A to 29J of the dial buffer 29 configured as shown in FIG. 2A can be selected.

In the embodiment of the present invention has been described an example of reducing the value of the temporary index buffer 36 by the input of the repetitive dial key, if a person having ordinary skill in the art puts a software timer count, if a certain time elapses You will notice that the value of the temporary index buffer is automatically reduced so that you can select the dial digits already stored.

As described above, in the present invention, a communication terminal having a dial function is automatically recorded in a circular dial buffer even if a dial digit frequently used is not stored in the internal memory by using a shortcut key, and the circular dial digit is simply stored. There is an advantage that the redial can be simplified by selecting and automatically dispensing by the operation.

Claims (5)

An AC signal transmitting and receiving means for reproducing an AC signal carried in a communication voltage of the telephone line, and outputting an AC signal superimposed on the communication voltage, and outputting the telephone line and the AC signal transmitting and receiving means in response to a communication path control signal. A selective redialing device of a dial digit sent out from a communication terminal having a communication path control means for connecting to form a communication path, comprising: storage means having at least one area for storing a dial digit signal for calling a counterpart; An index counter for indicating a storage location of the storage means, increasing a value of the storage location in response to a dial transmission, a dial signal sending means for generating a dialing signal corresponding to an input dial digit and transmitting the dialing signal to a telephone preference; A dial d input at a location of the storage means indicated by the index counter. It stores the jits and supplies them to the dial signal transmitting means, and decreases the value of the index counter in response to the number of times of the repeated dial signal and accesses the dial digits stored in the storage area corresponding to the value of the reduced index counter. And a control means for displaying and supplying the displayed dial digit to the dial digit dispensing means in response to the input of the outgoing signal. An AC signal transmitting and receiving means for reproducing an AC signal carried in a communication voltage of the telephone line, and outputting an AC signal superimposed on the communication voltage, and outputting the telephone line and the AC signal transmitting and receiving means in response to a communication path control signal. A selective redialing device of a dial digit sent out from a communication terminal having a communication path control means for connecting to form a communication path, comprising: storage means having at least one area for storing a dial digit signal for calling a counterpart; And a dial signal sending means for generating a dialing signal corresponding to the digit signal output from the storing means and transmitting the dial signal to a telephone line, and outputting a recording address signal of the storing means, and recording in response to the output of the dial signal sending means. Index counter for incrementing the address signal and repetition dial key input A temporary index buffer for outputting a previous value of the index counter as a read address signal in response to the output, and a dial digit input from the keypad at an address of a storage means corresponding to a write address signal output from the index counter, And a control means for accessing the dial digit stored in the area indicated by the read address signal output from the temporary index buffer in response to the input of the repetitive dial key, and supplying the dial digit to the dial signal transmitting means. Optional redialing device for dialed digits. A storage means having at least one area for storing a dial digit signal for calling a counterpart, an index counter for cyclically selecting a storage location of the storage means, a temporary index buffer for reading a dial signal stored in the storage means; A selective redialing method of a dial digit transmitted by a communication terminal having a dial signal transmitting means for generating a dialing signal corresponding to a digit signal output from the storage means and transmitting the dial signal to a telephone line, In response, storing a dial digit corresponding to the dial key in a storage area indicated by the index counter, supplying the stored dial digit to the dial signal transmitting means, and simultaneously increasing the index counter; Of the index counter Is reduced according to the number of times of repeated dial keys, stored in the temporary index buffer, and a dial digit sending process of accessing and transmitting dial digits stored at a position corresponding to the value of the temporary index buffer is performed. Selective redialing method of dial digits sent out from communication terminal. 4. The method of claim 3, wherein the circular digit rotation storing step comprises: storing a dial digit corresponding to the dial key at a location of an address indicated by the index counter in response to an input of a dial key; And a cyclic storage area indicating step of transmitting the stored dial digit upon completion of storing and incrementing the index counter. The method of claim 3 or 4, wherein the dial digit sending process copies the value of the index counter to a temporary index buffer in response to an input of a repetitive dial key, and the copied value is stored in the last area of the storage area. A storage area retrieval process for retrieving whether the value is a value; and if the value copied at the storage area retrieval process is a value of the last area of the storage area, the value of the temporary index buffer is initialized, and the copied value is stored in the storage area. A redial area setting process of decreasing the value of the temporary index buffer when the value of the last area is smaller, a display process of displaying a dial digit stored in a storage area indicated by the temporary index buffer set in the redial area setting process; The displayed dial digit is transmitted in response to the input of the outgoing key, and in response to the input of the repeat dial key. And a dial digit selective transmission process of reducing the value of the temporary index buffer and repeating the displaying process.