KR970004825B1 - International calling control system - Google Patents

Abstract

An international communication calling control method and apparatus where executes the callback calling service and the card direct calling service as the direct dialling calling method. The said method uses to one of the said two service as the exclusiveline, and the calling service of the most chipper charge is supplied.

Description

International communication CALLING control device and its control method

1 is a block diagram of the international telephone call control device according to the present invention.

2 is a main control flow diagram showing an international telephone call control method according to the present invention.

3 (a) and (b) is a control flow chart showing a callback call control method according to the present invention.

Figure 4 (a) and (b) (c) is an illustration of the installation of the international telephone call control device according to the present invention.

5 (a) and 5 (b) are explanatory diagrams of dialing of an international telephone call control device according to the present invention.

6 is a block diagram of an international telephone call control telephone according to the present invention.

* Explanation of symbols for main parts of the drawings

10: telephone 20: switching center

100: microcomputer 111: hook detection unit

112,142: photocoupler 121,131: matching transformer

122: signal receiver 123: sound transmitter

132: signal transmitter 133: tone detector

141: ring detection unit 151,152: first and second line switching relay

11: handset 12: keypad (dial)

The present invention relates to a terminal-level international communication call control device for automatically connecting various international communication services and a control method thereof. In particular, the call back call service (ALL BACK CALLING SERVICE), card direct calling service (CARD DIRECT CALLING) The present invention relates to an international communication call control device and a control method for connecting international communication by a method such as a general direct calling service.

In general, as an international communication method using a telephone line, the caller (telephone or communication terminal) calls the other party (telephone or communication device of the telephone number of the telephone number that the caller wants to make a real call) directly through the switching center. There is a direct communication method, a communication method using a callback service, and a communication method using a card direct service.

In the communication method using the callback service, if a user's unique number is given by subscribing to a callback service and the user dials and hangs up a call to a company (callback service exchange) that provides a callback service using the user's unique number, The callback service company makes a callback to call the caller. At this time, the callback service exchanger remembers the user's phone number in advance in correspondence with the user's unique number. Therefore, when a call to the callback service is received with the user's unique number, the callback service exchanger can know the user's (ie, the caller's) phone number. You can then make a callback service that calls the caller.

When you receive the callback call, you will hear a communication opening tone (or voice message) .If you enter the phone number of the party you want to call after hearing the opening tone, the callback service exchange will make a call to the other party you want to call. It provides callback calling service.

In addition, in the communication method using the card direct service, when a user subscribes to receive a service from a company providing a card direct calling service (card direct service switch), the user's password is given to the subscriber (ie, the caller). ) Calls the card number of the card direct company, and when the communication is established, a voice message (or communication opening tone) is outputted to input a password, and the user enters the user's password assigned according to the voice message. When the direct service exchange recognizes the service subscriber and provides a communication line, a voice message (or a communication opening tone) is output to input the other party's telephone number to be called again. Accordingly, when the caller inputs the other party's telephone number to call, The card direct service exchange calls the other party. It provides a card direct service that connects communication by walking.

Here, the callback calling service calls a callback service company, hangs up, waits, and waits for a callback. When a callback is made, the user needs to answer the call and input the desired party's phone number. The card direct service calls the card direct service company. After making a call and inputting his / her password according to the voice message to recognize that he is a subscriber, he / she must input the desired counterpart phone number to enable communication connection.

However, the reason for using a more complex callback calling service or a card direct calling service than the direct communication method is that the difference in communication requirements for each country is a computer, and is mainly used to pay a lower communication cost. It can also be used when the direct communication connection is complicated, time consuming, or when the conditions of the public line network are poor.

For example, in developed countries where communication networks are developed, communication rates are relatively low, but in countries where communication networks are not developed, they are often expensive. In this case, callback services or card direct services in countries where communication rates are relatively low When used, the communication fee is calculated as the communication fee of the cheaper country, the communication fee is paid by the service company, and the subscriber pays the service fee to the service company. That is, when a caller makes an international call, the communication fee is charged to the service company, so that the communication fee can be communicated at a low rate because the service company is subject to the tariff system of the country to which the service company belongs.

However, in the conventional communication method using the callback service, the international call must first be made to the callback service side exchange, and then, after the call back is made, the callback is made and the caller needs to call the other party's phone number. You have to enter another phone number twice, as well as the inconvenience of having to hang up and waiting, and the inconvenience of getting a long time to actually establish a communication connection.

In addition, when a call is made using a callback method through a key-phone system or a private branch exchange (PBX), a plurality of extensions are connected to the corresponding station, so There are often cases where a callback does not come to the user, and other people receive a callback and mistake it for a wrong call.

In addition, if you use both a telephone and a fax machine, if you make a call to a callback service company and hang up the receiver, it automatically enters the fax reception mode, so you cannot know whether it is callback or fax reception. There is an inconvenient problem that must be switched to use, and to switch back to fax mode or automatic mode after using the callback.

On the other hand, in the case of using the card direct calling service, there is an advantage of not having to make a telephone call to the service company and put down the handset, while the country code, the area code and the calling phone number to call the service company, the password for the caller recognition and Since the other party's phone number to be actually dialed must be input, a large number of numbers may be input, which may result in a wrong number input. In this case, the number must be restarted from the beginning, which is very inconvenient and cumbersome.

In addition, after calling the card direct calling service company, you have to wait until the voice message to input the password from the exchange of the service company, and wait for the voice message to input the other party's phone number after the password is input. There are drawbacks such as long time waiting, long time, etc., and since a foreign language voice message is output, a user who does not understand this may be embarrassed.

Accordingly, an object of the present invention is to improve the problems of the conventional callback service and the problem of the card direct service as described above, and the callback calling service and the card direct calling service are simple and convenient only by dialing a method such as direct calling. The present invention provides an international communication calling control device and a method of controlling the same.

Another object of the present invention is that only one of the callback calling service, the card direct calling service and the direct calling service can be used as a dedicated service, and according to the charges for each region, country, and service company charged as a communication partner. The present invention provides an international communication calling control device and a method of controlling the same, which can provide a low-cost call service.

Another object of the present invention, as well as a general telephone, the international communication call control device and control method that can be used to automatically connect to the callback call service even in the place where the key-phone system, private exchange (PBX) is installed It is to provide.

As a means for achieving the object of the present invention, a line control means for blocking and switching the communication line of the user and the external line and the communication line in two stages, and the dialing or button transmitted from the communication terminal Signal receiving means for receiving a signal (DTMF signal) and a digital signal, a transmitting means for transmitting a sound message to the communication terminal, an external signal judging means for separately detecting a dialing signal and a digital signal through an external telephone line; External signal judging means for detecting the tone signal, message signal and digital signal transmitted from the outside, ring signal detecting means for detecting the ring signal transmitted from outside, and calling according to the equipment use code and country code in advance Required for calling service such as service type, service company call phone number and user password It stores the information, and detects the communication use of the communication terminal, the operation is controlled to control the respective parts in advance according to the country code, and control the call connection, card direct calling or direct calling to establish the communication connection. An international communication calling control device is configured as a control means, and the calling service type according to the device usage code and country code in advance and necessary for a calling service such as a service company call phone number and a user password for each service. According to the invention of storing information, and when the device use code and the country code is input at the time of communication use of the communication terminal, the communication connection is automatically controlled by selectively controlling the corresponding calling service according to the country code. Connect the device between an external communication line and your communication terminal (e.g. telephone). When you connect, and input only the device use code, country code and the other party's call number that contains international communication code when you use the communication, callback calling, card direct calling or Since the communication connection is made through direct calling, etc., it can be used very conveniently while paying the lowest fee.

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

1 is a block diagram of a callback service control apparatus according to the present invention, and FIG. 2 is a callback service control flowchart according to the present invention. A telephone detector is used as a communication terminal of a user, and a hook detector is used as a means for detecting communication usage. In one embodiment, a microcomputer was used as a control means.

The hook detection unit 111 for detecting the hook on / off of the telephone 10, the signal receiver 122 for receiving DTMF signals and digital signals transmitted from the telephone 10, and a sound message to the telephone 10. A sound transmitter 123 for transmitting a signal, a signal transmitter 132 for transmitting various DTMF signals and digital signals necessary for providing a calling service to an external telephone line, and a dial tone or busy signal transmitted through an external telephone line. External signal determination unit 133 for detecting and determining the tone (Busy Tone) and ring back tone (Ring Back Tone) and the external telephone line connected to the switching center 20, the telephone 10 side or the signal transmitter 132 described above. ) And a first line switching relay 151 for selectively switching to the external signal determination unit 133, and a second line switching for blocking / connecting a connection line between the first line switching relay 151 and the telephone 10. Switching between the relay 152 and the first line switching relay 151 A ring detection unit 141 for detecting a ring signal transmitted from the external line through the connection line 10 and a corresponding service company call telephone number of a calling service type according to a device use code and a country code in advance. And storing information necessary for a calling service such as a user password, and detecting whether communication is used through the hook detector 111 of the telephone 10, the operation is started, and the first and second line switching relays 151 described above. The international communication call control device is controlled by the microcomputer 100 that controls the 152 and the above-mentioned angular rules to control the callback calling, the card direct calling or the direct calling according to the country code. Configure.

Here, the first and second line switching relays 151 and 152, the common (COM) terminal of the first line switching relay 151 is connected to an external telephone line, the first line switching relay 151 The ON terminal of the second line switching relay 152 and the ring detector 141 are connected to the ON terminal of the second line switching relay 152, and the matching transformer 131 is connected to the OFF terminal of the first line switching relay 151. ) Is connected to the matching transformer 131, the signal transmitter 132 and the external signal determination unit 133 is connected.

In addition, the external line to which the common (COM) terminal of the first line switching relay 151 is connected may be a telephone line directly connected to a public line network, but in the case of using a private exchange, the telephone line is connected to a private exchange.

In addition, the common (COM) terminal of the second line switching relay 152 is connected to the telephone 10, and also commonly connected to the hook detector 11 and matching transformer 121, the matching transformer 121 The signal receiver 122 and the sound transmitter 123 are connected to each other, and an ON terminal of the second line switching relay 152 is connected to an ON terminal of the first line switching relay 151. The OFF terminal of the second line switching relay 152 is connected to an AC power source and a ground terminal, respectively.

In addition, the hook detection unit 111 is configured to apply a hook on / off detection signal of the telephone 10 to the microcomputer 100 through the signal generation photo coupler 112. The communication terminal is not a telephone but communicates. In the case of a modem, a means for detecting a communication start signal of a communication device is required, and the ring detection unit 141 also detects a ring signal transmitted through an external line to the microcomputer 100 through a photocoupler 142 for signal generation. It is supposed to apply a signal.

In addition, the sound transmitter 123 is configured to generate and transmit a standby sound melody generated during the callback service control to the switch 10, and to transmit the necessary sound message when controlling other card direct calling services.

In addition, the matching transformer 121 is for transmitting and matching signals between the telephone 10, the signal receiver 122, and the sound transmitter 123, and the other matching transformer 131 is an external line and the signal transmitter. 132 and the signal between the external signal determination unit 133 is to transfer each other to match.

In addition, the external signal determination unit 1330 determines a state of an external line for call control and a state of an exchange providing a service, and includes a dial tone (eg; indicating that communication is available). TU ------), a busy tone that indicates that you are on a call (e.g. dou-thu -...), and a ring that rings the calling party (e.g., the service company's switchboard or calling party) It detects the back tone (eg, follow) and voice message signal and communication protocols corresponding to each of the above to discriminate it.

The microcomputer 100 includes a memory which does not erase the stored contents even when the power is turned off. The memory includes a device use identification code (eg, '0001') and an international communication access code (eg, '001', '002', etc.), the country code, the service type selection code of the unit, the phone number for the service company, and the user password for the card direct calling service. In addition, the user should temporarily store the counterpart number that the user wants to call.

On the other hand, the international communication call control method according to the present invention carried out by the device configured as described above, as shown in Figures 2 and 3, it is determined whether or not the communication use of the user communication terminal when the communication use A device use determination process for detecting whether the predetermined device use identification code is received from a communication terminal, and if the device use code is not input, determine whether it is an environment setting code, and according to each field designation, the external number of the private exchange and the device. Preset environment settings such as usage identification code, international communication access number to be used, telephone number to call service exchanger and user password required for card direct calling, and device usage environment are set in advance. When the recognition code is received, the communication terminal and the external line is cut off, and the station transmitted from the communication terminal Service type determination process for determining whether the callback calling, card direct calling or direct calling is designated by country based on the number, and when the callback calling is the designated country, the device use identification code entered above and the country to call Callback service company automatically receives a callback by inputting only the other party's number to be called after the number, and the callback call control process of calling the other party's phone number to communicate with the user's communication terminal, and designated as card direct calling. In the case of a country, the card direct calling service company is automatically called by inputting only the device use identification code and the country code to be called, followed by the country code to be called. Call the user to communicate Direct calling is controlled by the card direct calling control process for communicating with the terminal and inputting only the other party's number to be called after the device use identification code and the country code to be called. Direct call control is performed.

In the callback telephone control method according to the present invention, as shown in FIG. 3 (a) and (b), a device use identification code is input, a country code is inputted, and the country code is a predetermined callback calling service country. In this case, blocking the user's communication terminal and the external line, receiving and temporarily storing the other party's telephone number inputted from the communication terminal, calling the callback service company using a predetermined international communication number, and calling the callback service company. When the communication line is provided by the callback detection step and the callback is made and the exchange providing the callback service from the call back, the call to the temporarily stored phone number, and connects the communication terminal and the external line The communication connection step is performed.

Here, the device may be installed exclusively for callback calling or dedicated card direct calling, or may be installed to control them in combination.

The international communication call control device (also referred to as a link box) according to the present invention configured as described above is connected between an external line and a communication terminal (for example, an electronic telephone) and installed by connecting a 9V DC adapter to a power input jack.

At this time, the location to be installed is determined according to the communication environment of the telephone. When the telephone is directly connected to a public network line (C / O line) without a private exchange, it may be connected as illustrated in FIG.

In addition, when the telephone is connected to a private exchange with a DID function, as shown in FIG. 4 (b), the telephone is installed on the inner line of the private exchange standard, but only on the telephone line where the calling service is to be used. Install it.

And, the environment for each field should be specified and set, when picking up the handset of the telephone 10 connected to the apparatus, the hook detector 111 of the apparatus detects that the communication is used, and accordingly the first, The second line switching relays 151 and 152 are all switched to off terminals.

Subsequently, when the button signal is input through the phone 10, the microcomputer 100 receives the button signal through the signal receiving unit 122 and stores the signal by field according to a predetermined standard. The melody sound is transmitted through the sound transmitter 123 for each field. Accordingly, the user listens to the melody and sets an environment for each field according to a predetermined standard.

First, it is necessary to designate a communication environment, which is a field for designating an external connection number of a private exchange when a private exchange (PBX) or the like is installed to use a public telephone line through the private exchange. Enter the code (e.g. # * # 1), and enter the line number to the private exchange line number address that can be connected to the public line (e.g. # * # 1 * 9 *-melody transmission). If there is no private exchange or it is installed outside the private exchange, enter the field fax code without specifying the external connection number (e.g. # * # 1 * *-Melody) (where * is an input for classification). )

Next, a device use identification code of the device is specified. This specifies the device use identification code field (e.g. # * # 2), the number 0 0 common to the international communication number (e.g., 001 of Korea Telecom, or 002 of Dacom) for using the calling service, and international communication. Enter a unique identification number (eg 01) that is distinguished from the code (# * # 2 * 00 * 01 *.

After that, a country specific international communication number must be specified for the callback calling service.

This is a field (eg, # * # 3) for specifying an international communication number used to access a callback calling service, and enters a single dialtone confirmation address and an international communication number, which are specified in the recognition code designation field. Enter two digits after the common number.

For example, when dialing an international communication number and confirming a dialtone (e.g., specifying a dialtone confirmation 1), and using a callback calling service using the international communication number '007' in a country using international calls (but; If 00 'is designated as a common number, enter # * # 3 * 1 * 7 * to complete the melody transmission and complete the country's international communication number designation of the callback calling service. Detailed description will be omitted.)

Also, a country-specific DID (number for calling a card direct calling service company) code for a card direct service is specified. This field is used to specify the DID code used to access the card direct calling service. Since the signal standard is different for each service company, the address specification designation address and the DID code according to the country and company are designated. (Hereafter, the signal specification address and the respective codes are inputted one by one, but the description of the signal specification specification is omitted.)

It also specifies the user number for the callback calling service. This is an individual membership number given to the user who will use the callback service.

It also specifies a user password for the card direct calling service.

This is the password of the user given to the user who will use the card direct service.

It also specifies a direct calling service number, which specifies an international communication number for providing a direct calling service that is advantageous to the user.

In addition, a service type for each country is specified, which is specified to provide a calling service having the most advantageous function to the user according to the counterpart country in which the user is to call.

In this way, if the usage environment of the apparatus is set and the handset of the telephone 10 is lifted up, the hook detection unit 111 detects the hook-off state of the telephone 10 (the receiver is lifted), and the photo coupler 112 is used. Hook off detection signal is input to the microcomputer 100 through), and thus the microcomputer 100 starts the control operation.

Thereafter, when the hook-off of the phone 10 is detected and the microcomputer 100 starts to operate, it is determined whether the device use recognition code is received through the signal receiver 122.

If the device use recognition code is not received or the environment setting code is not received, the device does not perform the control operation because it is direct calling. That is, as in a general telephone, communication connection is possible through the public line network directly from the telephone 10.

On the other hand, when the device use identification code (eg, 0001) set in advance in the configuration is input, the telephone line on the telephone 10 side is turned off by turning off the first and second line switching relays 151 and 152. Blocks the connection to the line, and is connected to the external line and the signal transmitter 132 and the external signal determination unit 133 of the device.

Subsequently, the user recognizes the country code for the international communication inputted through the phone 10 and determines the country-specific communication service type determined in the above-described environment setting.

In other words, according to the counterpart country to communicate with, whether to use the callback calling service, the card direct calling service, or the direct calling service, and the international communication number to be used for each country, the micom ( 100) determines the type of calling service according to the corresponding country from among the types of calling service based on the country code input from the user terminal.

Accordingly, in the case of a callback calling service country, the callback calling service company makes a call using a predetermined international communication number, and receives a callback according to the callback call service that controls communication with the user's phone.

Also, in the case of the card direct calling service country, the card direct service company is dialed to a predetermined international communication number, the user password is sent out, and if the communication line network is provided, the call is made by calling the other party's telephone number. Controls the card direct calling service that connects.

In addition, in the case of a direct calling service country, the direct calling service is controlled by sequentially transmitting a predetermined international communication number and an inputted counterpart phone number.

Callback calling service control is a country code input when the device use enter code is input as shown in FIG. 3 (a) and (b), and then the country code entered is a country code designated as the callback calling service. And the counterpart's telephone number, that is, the counterpart's telephone number to be called using the calling service through the signal receiver 122 and temporarily stored.

At this time, when the storage of the other party's phone number is completed, under the control of the microcomputer 100, the sound transmitter 123 generates a waiting sound melody to wait for the callback service control and transmits it to the telephone 10 through the matching transformer 121. do.

On the other hand, when the first line switching relay 151 is switched from the on state to the off state, while the microcomputer 100 is connected to the external line, the state that can make a call to the outside under the control of the microcomputer 100 In addition, the microcomputer 100 transmits a signal transmission unit 132 to a predetermined international communication number (eg, '001 or 002') and a phone number for calling a callback calling service company (including the country code of the service company) stored in advance. Calls to the callback service exchange by sending through the callback, and performs a callback detection step of detecting whether a call is received from the callback service exchange.

In the callback detection step, the microcomputer 100 automatically dials and calls the callback service company, and then detects whether a ringback tone or busy tone is detected through the signal determination unit 133, and the busy tone is detected. When the first and second relays 151 and 152 are turned on, the operation of the device is stopped.

At this time, the first and second relays are turned on so that the telephone user directly hears the busy tone signal.

When a call is made to an exchange providing the callback service and a ring signal sounds at the exchange side, that is, when the telephone ringing at the exchange as the exchange is not busy, only the first line switching relay 151 is turned on. The ring detector 141 determines whether a ring signal is detected.

If the ring signal is not detected within a certain time, the second relay is turned on to connect the telephone to an external line, and then the control operation is terminated. If the ring signal is detected within the predetermined time, the first line switching relay 151 is described. ), And determines whether a dial tone, which is a communication opening sound, is detected through the external signal determination unit 133.

At this time, if the dial tone is not detected, since the call is received from the outside, the control operation is terminated so that the first and second line switching relays are turned on, which is the initial state, so that the user can talk to the external telephone, and the dial tone is detected. If the exchange providing the callback service makes a call back to the user's telephone (call back) and the exchange provides the communication line, the callback call control is continued.

When the dial tone is detected after the callback is made as described above, the phone number (counter country code, area code and counterpart number) desired for the actual call stored in the microcomputer 100 is dialed through the signal transmitter 132, and The first and second line switching relays 151 and 152 are all turned on to directly connect an external line to the telephone 10, and all control operations are completed.

On the other hand, if the country code entered after the device use code is designated as a card direct calling service country, the other party's phone number is temporarily stored, and a pre-designated international communication number and a previously stored card direct calling company are called. In addition, it is determined whether a communication connection with a card direct calling service company called through the external signal determination unit 133 and a message for inputting a password after communication connection are determined.

When a communication connection with the card direct calling service company is received and a message for inputting a password is received, the user's password stored in advance is transmitted through the signal transmission unit 132, and a counterpart phone number is provided while providing a communication network according to the password recognition. When a message for input is received, the temporarily stored counterpart phone number (country code, area code, and counterpart phone number) is transmitted through the signal transmitter 132, and the first and second relays 151 and 152 are transmitted. After turning on the phone 10 and the external line is connected, the control operation is terminated.

At this time, because the user's phone and the external line is connected, the user knows whether the other party rings or ringing (ringback tone), or is busy (business tone), so the user's judgment determines whether to continue the call.

On the other hand, if the country code entered after the device code is designated as the direct calling service country, the other party's phone number (country code and other party's phone number) is temporarily stored, and the predetermined international communication number and the temporarily stored country code The other party's number is transmitted through the signal transmitter 132, and the first and second relays 151 and 152 are turned on to connect the telephone 10 and an external line to control a direct communication service.

Therefore, the method for dialing for international communication calling according to the present invention is connected to a general telephone without a private exchange, so that the telephone number can directly dial a public network number without the use of a private telephone exchange number. As shown in Figure 1, the user picks up the receiver and inputs the device use identification code, the communication partner country code, the public network number, the area code, and the other party's phone number. Dialing the public network number after dialing a connection number) (e.g. 9), and then confirming the dial tone (indicated by '(*)'), as shown in FIG. Enter the connection number ('9'), check the dial tone, and use the machine identification code, the country code of the communication partner, the area code that is the public network number, and the phone number of the other party. In order to dial a public line connection number (eg '9') because it is connected to a private exchange, etc., if you dial the public network number consecutively without checking the dialtone, as shown in Fig. 5 (C). Enter the public network connection number (external connection number) ('9'), the device identification code, the communication partner country code, the public network area code, and the other party's telephone number.

In this way, by setting up the device and setting the environment according to the specified method, not only the direct direct calling but also the card direct calling service and the callback calling service can be used for international communication only by dialing in the same way as when using the direct call of a general telephone. The service will be available.

On the other hand, Figure 6 is a block diagram of the international telecommunications call control phone according to the present invention, as shown in Figure 1, the international communication call control device of the communication terminal, i. 11) and a keypad unit 12 for dialing and various button inputs can be configured as an international communication calling control phone, which can be used in the same manner as the international communication calling control device, and thus a detailed description thereof will be omitted.

As described in detail above, according to the present invention, it is possible to perform international communication using direct calling, card direct calling service and callback calling service only by dialing in the same method as direct calling, so that the number of numbers to be input is greatly reduced and number input error. Reduces the effect, very easy to use.

In addition, among the callback calling service, the card direct calling service, and the direct calling service, the service is automatically selected as an optimal communication service for the user according to the counterpart country, so that the service connection is made. It is convenient and has an effect of reducing the cost burden.

In addition, the callback calling service does not require the user to call the service company and hang up the handset, so that another person may receive the callback even when using a telephone connected to an extension or a telephone connected to a private exchange. There is no effect and the callback service can be provided correctly from the user's phone.

Claims (11)

Line control means for blocking and switching the communication line between the external line and the user's communication terminal and the apparatus in two stages, and a signal receiving means for receiving dialing, button signal (DTMF) and digital signals transmitted from the communication terminal. Message transmitting means for transmitting a sound message to the communication terminal, a signal transmitting means for transmitting a communication signal such as a dialing signal and a digital signal to the outside via an external line, a tone signal, a message signal and a digital signal transmitted from the outside; External signal judging means for distinguishing and etc., Ring signal detecting means for detecting ring signal transmitted from the outside, Calling service type according to device use recognition code, international communication number, country code and service call for each service Stores the information required for the calling service such as number and user password, and through each part International communication calling control device comprising a control means for selectively controlling callback calling, card direct calling or direct calling according to country codes while controlling call reception and transmission and line switching. . According to claim 1, The line control means, using the first and second line switching relays 151, 152 controlled under the control of the microcomputer, the common (COM) of the first line switching relay 151 The terminal is connected to an external line connected to a public line network or a private exchange, and the second line switching relay 152 and the ring detecting means are commonly connected to the ON terminal of the first line switching relay 151. Matching transformer 131 is connected to the OFF terminal of the first line switching relay 151, and the signal transmitting means and the external signal determination detecting means are connected to the matching transformer 131, respectively. The common (COM) terminal of the two-line switching relay 152 is connected to the user communication terminal and is commonly connected to the hook detecting means and the matching transformer 121, and the signal receiving means and the sound are connected to the matching transformer 121. The transmission means is connected, and the second line switching relay 152 of the The off terminal is connected to the power supply and ground terminal, respectively. The apparatus of claim 1, wherein the international communication calling control device is directly connected between the communication terminal and the public network line when the direct communication line is directly connected to the public network line (C / O line) without a private exchange. When connected to the exchange, install on the inner line of the private exchange standard, but install this unit only on the telephone line to use the calling service, when the communication terminal is connected to the private exchange (or keyphone system) without DID link Is installed on the outside line of the private exchange standard, the international communication call control device, characterized in that the installation on the public network line (external line) to use the call service. 2. The telephone set according to claim 1, characterized in that it comprises an international communication calling control telephone having a handset 11 of a telephone and a keypad 12 for inputting various dial signals and button signals instead of the communication terminal. International communication call control device. Device usage judgment process for detecting whether the predetermined device use recognition coat or environment setting code is received from the communication terminal, and various numbers required for the international communication calling service according to each field designation when the environment setting code is received. And an environment setting process for setting a use environment, a use environment of the device is preset, and when a device use recognition code is received, callback calling and card direct calling designated by each country based on the country code received from the communication terminal. Alternatively, the service type determination process for determining the type of international communication service that can be provided as a service of the most favorable condition for the user, such as direct calling, the input of the device use recognition code and the country code to be called Automatically by entering only the other party's area code and phone number International calling communication control method, characterized in that configured to perform the communication connection control procedure that connects to an international communication service type determined in the. The method of claim 5, wherein the communication connection control process is performed automatically by inputting only the device use identification code entered above and the counterpart number to be called after the country code designated by the callback calling. A callback call control procedure for receiving a callback by calling a callback service company, calling the other party's telephone number to communicate with the user's communication terminal, and in the case of a card direct calling country, the device use identification code entered above; Card Direct Calling service automatically calls the card direct calling service company by inputting only the country code to be called after the country code to be called, enters the user password and dials the other party's phone number to communicate with the user's communication terminal. Designed to carry out a call control process International calling communication control method according to claim. The method of claim 5, wherein the environment setting process comprises: a field for designating an external connection number according to whether a private exchange is installed, a field for designating a device use identification code, a field for designating an international communication number for a callback calling service, Field for specifying a country-specific DID code for a card direct service, a field for specifying a user number for a callback calling service, a field for specifying a user password for a card direct calling service, and an international communication service for a direct calling service. In order to provide the calling service with the most advantageous function according to the country where the user is to call, the field which specifies the number of the service is set up in order by setting the necessary environment for each. International communication call control method. The method according to claim 7, wherein each field is input through a button of a communication terminal, and the field designation and data input for each field are stored according to a predetermined standard. International communication calling control method characterized in that the transmission and guidance to specify the next field. Storing a unique phone number for calling a callback service company granted by the callback service subscription, an identification code for automatically controlling callback calling, and detecting that the user's phone is off, and then Detecting whether the predetermined device use identification code is received, blocking the telephone line on the telephone side when receiving the device use identification code, receiving and temporarily storing the other party's telephone number transmitted from the phone; A callback detection step of calling a callback service company with a stored unique telephone number and detecting whether a call is coming from the callback service company, and a communication line is provided by an exchange that makes a callback and provides a callback service. When it is possible to make a call, the other party received and stored from the telephone Dialing the telephone number callback telephone control method, characterized in that to connect the telephone line between the telephone and the external configured to perform the step of controlling the call back service. 10. The method of claim 9, wherein after receiving and storing the other party's telephone number, a standby tone melody is transmitted to the telephone to wait without hanging up the receiver. 10. The method of claim 9, wherein in the callback detection step, if a ring signal is detected and a dial tone is not detected within a predetermined time, a call line is terminated by recognizing that a call is received from the outside and connecting a communication line to the telephone to terminate the callback call. Callback telephone control method characterized in that the control to answer the call.