KR930002199B1 - Melody generating method for fax - Google Patents

Abstract

A melody producing circuit uses a fax modem for producing the various melody in a facsimile coupled with a multifunctional telephone, and eliminates a melody IC. The method to produce the melody comprises the steps of: detecting the reservation key input; searching the tone data in a memory; reading the tone data and setting the tone data to the fax modem; transmitting the tone data through the telephone line; detecting the end of the tone transmission; and cutting off the tone transmission by turning-off the RTS bit of the fax modem.

Description

How to generate melody using fax modem

1 is a conventional block diagram.

2 is a block diagram of the present invention.

3 is a flow chart according to the present invention.

* Explanation of symbols for main parts of the drawings

10: CPU 20: key input unit

30: memory 40: fax modem

101, 102: telephone line

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of generating a melody using a fax modem, and more particularly, to hold a conventional multifunction telephone by generating a melody using a built-in fax modem in a telephone integrated facsimile. The present invention relates to a melody generation method using a fax modem capable of performing a function.

In general, the multi-function phone refers to a phone having not only a simple call function but also a redial, speed dial, reject, reserved call, and hold function.

Among the various functions, the hold function refers to a function of temporarily placing a call on "hold". In general, when the state is "pending", the incoming call is put on hold and the melody is transmitted through the telephone line so that the other party can hear. In this case, the melody is typically generated by using a melody integrated circuit (IC). Currently, a telephone integrated facsimile with a multifunctional telephone as described above is widely used. The telephone-integrated facsimile may perform a hold function as described above in a call mode as well as transmitting and receiving images.

The conventional facsimile having the holding function as described above has a central processing unit (CPU) 10, a key input unit 20, a memory 30, a fax modem 40, and the like as shown in FIG. It consists of a melody IC 50. Reference numerals 101 and 102 denote telephone line lines connected to the public telephone network.

In the configuration of FIG. 1, the CPU 10 generally controls the system, and the key input unit 20 outputs the corresponding key data to the CPU 10 according to a user's key operation. The memory 30 stores an execution program of the CPU 10, and the melody IC 50 transmits a predetermined melody through the telephone lines 101 and 102 under the control of the CPU 10. Send it out. In addition, the fax modem 40 uses a facsimile dedicated modem for modulating and demodulating the input / output signals of the telephone lines 101 and 102 and the CPU 10. Referring to the first, a conventional operation example will be described. Now, when the user presses the hold key of the key input unit 20 while the call path is formed by a communication circuit (not shown) through the telephone lines 101 and 102 of FIG. 1, the CPU 10 The control signal is output to the melody IC 50 by the holding key input of the key input unit 20. Accordingly, the melody IC 50 generates a predetermined melody and is transmitted through the telephone lines 101 and 102. Thus, the other party can hear the melody.

As described above, since the melody IC is used to generate the melody when the hold function is performed, the cost of the product increases. In addition, there is a disadvantage that only the fixed melody in the melody IC can be generated and transmitted. Accordingly, an object of the present invention is to provide a melody generating method capable of performing a holding function without using a melody IC by generating a melody using a built-in fax modem in a telephone integrated fax machine.

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

2 is a block diagram to which the present invention is applied, and a CPU 10 for controlling the system as a whole, and a key input unit 20 having a holding key and outputting a key input according to pressure of a key to the CPU 10. ), A memory 30 which stores the execution program and tone data of the CPU 10 and is accessed by the CPU 10, and a telephone line 101 connected to a public telephone network. A fax that modulates and demodulates an input / output signal between the telephone lines 101 and 102 and the CPU 10 and generates a melody under the control of the CPU 10 and transmits the melody through the telephone lines 101 and 102. It consists of a modem 40. The configuration of FIG. 2 removes the melody IC 4 from the above-described configuration of FIG. 1, and the fax modem 40, as described above, may be used as a fax-only modem by Rockwell, USA. have.

FIG. 3 is a flow chart according to the present invention, which is an operation flowchart of the CPU 10 in the configuration of FIG. 2 and searches for the tone data in the memory 30 when there is a pending key input from the key input unit 20. The search process is terminated when there is none, and the tone data is read when there is tone data in the search process, and the tone frequency is set in the fax modem 40 according to the tone data, and the transmission level is set. A set process of setting, a sending process of "turning on" a Request To Send (RTS) bit of the fax modem 40 to transmit the set tone through telephone lines 101 and 102; A transmission completion inspection process for searching whether the tone transmission time is finished according to the tone data, and at the end of the transmission time in the transmission completion search process, turning off the RTS bit of the fax modem 40 to block the tone transmission and proceed to the search process. To complete the delivery process Achieved.

An operation example according to the present invention will now be described in detail with reference to the second configuration diagram and the flowchart of FIG. 3. Now, when the power is "on" and a call path is formed by a call circuit (not shown) through the telephone lines 101 and 102 of FIG. 2, the CPU 10 of FIG. In step (3a) of the figure is checked whether there is a hold key input. At this time, when the user presses the hold key of the key input unit 20 to hold the call, if the corresponding key data is input from the key input unit 20, step (3b) is performed. In step (3b), it is checked whether tone data exists in the memory 30. At this time, the tone data is data stored in advance in the memory 30 as data such as frequency and time of each tone for the melody transmitted to the other party through the telephone lines 101 and 102 in the "hold" state. . If there is tone data in the memory 30 in step (3b), the process proceeds to step (3c) to read tone data for the first tone of the tone data. In step (3d), the frequency is set through the internal register of the fax modem 40 according to the read tone data, and in step (3e), the output of the signal to be transmitted through the telephone lines 101 and 102, i.e. Set the transmission level. After the data setting is completed as described above, in step 3f, the internal RTS bit of the fax modem 40 is turned on so that the set tone can be transmitted. Therefore, the tone of the frequency according to the tone data is transmitted from the fax modem 40 through the telephone lines 101 and 102.

As described above, when the tone is sent, it is searched in step 3g whether the tone sending time is over. If the transmission of the tone is completed during the time according to the tone data in the step (3g), in step (3h) "off" the RTS of the fax modem 40 so that the tone is no longer sent to step (3b). Looping repeats the above process. Therefore, by outputting the tone by sequentially reading the tone data in the memory 30, the entire melody is transmitted, so that the other party can hear the melody during the "hold" state. In addition, in step (3b), when there is no tone data search result of the memory 30, that is, when all tone transmissions for one melody are completed, the process ends.

Meanwhile, various melodies may be generated by modifying tone data in the memory 30.

As described above, the present invention is a method of generating a melody using a built-in fax modem in a facsimile, and thus, it is possible to lower the cost of a product by enabling a melody according to a holding function without using a melody LC. In addition, various melodies can be generated by modifying the tone data stored in the memory.

Claims (1)

A CPU 10 for controlling the system as a whole, a key input unit 20 having a holding key and outputting a key input corresponding to pressing of a key to the CPU 10, a program to be executed by the CPU 10, and Memory 30 stored in tone data and accessed by the CPU 10, telephone lines 101 and 102 connected to a public telephone network, and between the telephone lines 101 and 102 and the CPU 10. In the method for implementing melody using a fax modem having a fax modem 40 for modulating and demodulating an input / output signal and generating a melody under the control of the CPU 10 and transmitting it through the telephone lines 101 and 102, A search process for searching whether there is tone data in the memory when there is a pending key input from the key input unit and ending when there is no tone data; Tone Frequency to Modem A set process of setting a transmission rate and a transmission level, a sending process of " on " the RTS bit of the fax modem to transmit the set tone through a telephone line, and whether the tone transmission time according to the tone data is finished. A transmission completion search process for searching and a transmission completion process for turning off the RTS bit of the fax modem 40 to block the tone transmission at the end of the transmission time in the transmission completion search process and proceeding to the search process Melody implementation using fax modem.