KR100334087B1 - A communication method between internet telephone interface utility and internet-central office-telephone - Google Patents

Abstract

The present invention provides an internet telephone interface device and an internet-line-outline telephone call for implementing an internet telephone call using an external telephone.

During an internet telephone call, an audio output signal received from an external terminal connected to the external telephone is output to the handset of the external telephone, and the audio input signal received from the external telephone is input to an audio input terminal of the external terminal. Internet phone call using an external telephone,

In addition, it is possible to make three-way call of Internet-Cooking Line-External Calling Period when necessary when making a telephone call during Internet-Cooking Line or C-line-External Calling, and to enable relay operation for direct call between Internet-Cooking Line without adjustment of external telephone user. It is characterized by.

Description

Internet Phone Interface Device and Internet-Cooking Line-External Phone Call Implementation Method {A COMMUNICATION METHOD BETWEEN INTERNET TELEPHONE INTERFACE UTILITY AND INTERNET-CENTRAL OFFICE-TELEPHONE}

The present invention relates to an internet phone, and more particularly, to an internet telephone interface device and a method for implementing an internet-line-outline telephone call for enabling an internet phone call using an external telephone.

Recently, due to the development of computer and communication technology, various applications using multimedia information processing and multimedia have emerged. In addition, the popularization of the Internet (internet) connecting every corner of the world is occurring rapidly, and the range of application has recently been extended to long distance calls through the Internet. The telephone call through the internet network refers to a service that enables a telephone call to be made through the internet network without using an existing telephone network. That is, a PC equipped with an Internet phone SW, a speaker, a microphone, and a sound card is connected to the Internet. Connected to, means a system implemented to allow a PC owner with the same system to talk like a regular phone. Telephones via the Internet were first introduced by Israel's Vocaltec in February '95 and rapidly spread throughout the world, from early PC-to-PC to PC-to-phone, and even phone-to-phone. It is a developing trend.

Despite the problems that the call quality is lower than that of the general call, and the internet subscribers have to be in the online standby state at the same time, the international call is possible at a low price because it is connected through the Internet. In addition, due to the advantage of the simultaneous transmission of multimedia data, such as images, documents by digital transmission, its speed is rapidly advancing.

FIG. 1 illustrates a system configuration for a conventional Internet telephony call. Referring to FIG. 1, an ISP (Internet Service Provider) 118, 120 is an Internet service provider, and each PC of user A and user B 128. Reference numerals 102 and 130 denote providers that provide basic services for accessing the Internet network 116. For example, the numbers 102 and 130 may be, for example, Hitel, Unitel, and Naunuri. Internet phone providers 122 and 124 refer to service providers such as dial pads or large people who are currently performing phone service, and provide a service for enabling a phone call between PCs connected to their servers. It provides a service to make a phone call between the PC connected to the user and the other party's phone. The Internet Telephony Gateway 126 converts the packet data of the Internet protocol transmitted from the Internet telephony operators 122 and 124 into a data format used by the telephone network 112 and transmits the data to the switch 114, and the exchange 114. The data transmitted from the packet is converted into packet data of the Internet protocol and transmitted to the Internet telephone service providers 122 and 124.

Now, a telephone call method between user A and user B 128 will be described with reference to FIG. 1. First, user A calls user B. There is a method of making a phone call to a telephone-to-phone through an exchange and a telephone network as in route 1 (L1). A microphone and a speaker are provided as in route 2 (L2). There is a method of conducting a PC-to-telephone telephone call through an Internet telephone provider server after connecting to an ISP server of an Internet network using a computer. In addition, there is a method of PC-to-PC telephone call through an Internet telephone provider server as in Route 3 (L3), and a method of performing a telephone call directly between a PC connected to the Internet network using an IP address without passing through the Internet telephone provider. .

The operation of the Internet telephone call corresponding to the route 1 and the route 3 in the telephone call method will be described in detail as follows.

First, the PC-to-PC Internet phone is connected to the Internet at the same time by a person who wants to make a phone call, and then connects to an Internet phone server of Vocaltec or DialPad to find and call the other party. Digitize the incoming analog voice signal and compress it, and send the packetized voice to the PC of the listener through the internet network in packet unit using H323, RSVP, RTP / RTCP protocols, and then decompress and digitize the receiving PC. The packet is exchanged by converting the packet data into an analog voice signal so that the voice spoken through the speaker is restored.

Next, the conventional PC-to-phone type internet phone corresponding to the path 1 is the PC-to-phone type internet phone is installed in a PC and connected to the Internet network through a device called an Internet phone gateway installed in a specific area. The phone rings and makes a call. The person who calls through a PC is the same as the PC-to-PC method described above, but the recipient is called by a general telephone, which is an advanced method compared to the PC-to-PC method. In other words, the PC-to-PC method uses the Internet method, whereas the PC-to-phone method uses the Internet method for making a call and the calling method makes an existing call method. In other words, the role of the Internet phone gateway is to connect the Internet with the existing telephone network.

However, in the conventional Internet telephony service implemented as a PC-to-PC or a PC-to-phone described in FIG. 1, the user has no choice but to use a speaker and a microphone connected to the PC sound card as shown in FIG. I couldn't help but speak through my microphone near my PC and listen through my speakers. In addition, it was inconvenient to use, such as wearing headphones equipped with a microphone for more stable voice reception.

In addition, it is impossible to make a three-way call using a conventional interphone, and when implementing an Internet telephone call using IP, there is no service providing the IP of the other party to call, and always check the IP address between the parties to know the IP of the other party. There was a problem that Internet telephony call using IP is possible.

Accordingly, an object of the present invention is to enable an Internet telephone call using an external telephone, and to implement a two- or three-way call in the Internet, trunk line and external telephone periods during the Internet or trunk line telephone call using an external telephone. An internet telephone interface device and method are provided.

In order to achieve the above object, the present invention provides an internet telephone interface device and an internet-line line-outside telephone call realization method for enabling an internet phone call using an external telephone.

During an internet telephone call, an audio output signal received from an external terminal connected to the external telephone is output to the handset of the external telephone, and the audio input signal received from the external telephone is input to an audio input terminal of the external terminal. Internet phone call using an external telephone,

In addition, it is possible to make three-way call of Internet-Cooking Line-External Calling Period when necessary when making a telephone call during Internet-Cooking Line or C-line-External Calling, and to enable relay operation for direct call between Internet-Cooking Line without adjustment of external telephone user. It is characterized by.

1 is a system configuration diagram for a conventional Internet telephone call,

2 is a system configuration diagram for an internet telephony call according to an embodiment of the present invention;

3 is a block diagram of an Internet telephone interface device according to an embodiment of the present invention;

4A and 4B are detailed block diagrams of the Internet / line call processing unit of FIG. 3;

5 is an example of detailed circuit configuration of the call connection unit of FIG.

6A and 6B are block diagrams of an Internet telephone interface device according to another embodiment of the present invention;

7 is a system configuration diagram of a phone number and IP relay server according to an embodiment of the present invention;

8 is a flowchart illustrating an initial configuration of an Internet telephone interface device according to an embodiment of the present invention;

9 is a block diagram illustrating a main menu screen of an application program for an Internet telephone interface device according to an embodiment of the present invention;

10 is a configuration diagram of the initial setting screen of the Internet phone interface device application program according to an embodiment of the present invention;

11 is an operation control flowchart for implementing a three-way call in the Internet telephone interface device according to an embodiment of the present invention;

12A and 12B are flowcharts illustrating operations for implementing an internet-line direct call in an Internet telephone interface device according to an exemplary embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the reference numerals to the components of the accompanying drawings, it should be noted that the same reference numerals have the same reference numerals as much as possible even if displayed on different drawings. Also in the following description and in the accompanying drawings, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. And a detailed description of known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

2 illustrates a system configuration of an internet telephone according to an embodiment of the present invention. 2, the configuration of the Internet telephone system according to an embodiment of the present invention is to replace the telephone interface device 200 with the external telephone (108, 136) instead of the microphone and speaker that must always be provided in the user PC for the conventional Internet telephone call It is installed between PCs 102 and 130 to enable internet telephone calls using external phones 108 and 136. That is, the user receives the received audio signal from the other party output from the conventional PC (102, 130) to the handset of the external telephone (108, 136) via the telephone interface device 200, and the user input from the handset of the external telephone (108, 136) The transmitted audio signal of the is transmitted through the telephone interface device 200 to the microphone signal input terminal of the PC (102, 130). Therefore, it is possible to make an internet phone call as in a normal phone call by using an external telephone without a microphone and a speaker provided in the conventional PCs 102 and 130.

Figure 3 is to enable the Internet phone call using an external telephone in accordance with an embodiment of the present invention, the implementation of a two- or three-way call in the Internet, trunk line and external telephone periods during the Internet or trunk line telephone call using the external telephone The detailed block diagram of the telephone interface device of the Internet telephone system is shown. Referring to FIG. 3, the operation of the telephone interface device is described. The first relay 302 is switched by the controller 320, and in the trunk line telephone mode, the relay mode for the direct call between the Internet and the trunk line, and the Internet. In the three-way call mode of the trunk line-external telephone period, it is closed and connects the subscriber side of the trunk line to the call connection unit 312 through the trunk line call processing unit 310, and in the case of the Internet telephone mode, the line is opened and the Internet-line line call Shut off the line. The trunk line telephone mode refers to a mode for making a telephone call between an external telephone 330 and a trunk line, and the internet telephone mode refers to a counterpart side connected to the Internet using an external telephone 330 and the Internet. This mode means you can make a phone call. In addition, the relay mode for the direct call between the Internet and the trunk line refers to a mode that enables direct communication between the Internet subscriber and the trunk line subscriber through the Internet telephone interface device without relaying the subscriber of the external telephone 330. In addition, the three-way call mode of the Internet, trunk line, and external telephone period is implemented to enable three-way communication by simultaneously connecting additional trunk lines or Internet subscribers that are received while the external telephone subscriber is talking with the other party through the trunk line or the Internet. It means one mode. The second relay 304 is switched by the control unit 320, and is closed in the trunk line telephone mode to form a call line between the external telephone 330 and the trunk line. In the relay mode for the call and in the three-way call mode of the Internet- trunk line-external telephone period, both are opened to block a direct call line between the trunk line and the external telephone 330. The third relay 306 is switched by the control unit 320 and is opened in the trunk line telephone mode and in the relay mode for direct communication between the Internet and the trunk line, thereby blocking the connection between the external telephone and the Internet call processor 308. In the Internet phone mode and the three-way call mode during the Internet-Cooking Line-External call period, the phone is closed and forms a call line between the external phone 330 and the Internet call processing unit 308 to use the Internet using the external phone 330. Make phone calls and three-way calls possible. The fourth relay 322 is switched by the controller 320, and outputs an audio signal output from an external PC through an external speaker in a trunk line telephone mode, in an internet telephone mode, an internet-to-line relay mode, and the Internet. In the 3-way call mode, an audio signal output from the PC is transmitted to the trunk line or the external telephone 330 through the call connection unit 312. The fifth relay 324 is switched by the control of the control unit 320. In the trunk line telephone mode, the fifth relay 324 is connected to an external microphone provided in the PC to apply an audio signal input from the microphone to the microphone signal input terminal of the PC. In the mode, the Internet- trunk line relay mode and the Internet- trunk line- external telephone period three-way call mode, the audio signal output from the PC is transmitted to the trunk line or the external telephone 330 through the call connection unit 312.

As shown in FIG. 4A, the internet call processing unit 308 is connected to a subscriber line matching unit (SLIC) 400 that matches the subscriber line with the external telephone 108, and a trunk line notifying the user when a landline telephone call is received during an internet telephone call. When the incoming alarm sound generator 402 and the 'hook off' detection unit 406 and the external telephone 330 detect the 'hook off' and detect the 'hook off' of the external telephone 330. It is configured to include at least a call waiting sound generator 408 for generating a call waiting sound as in an exchange. The trunk line call processing unit 310, as shown in Fig. 4B, is a trunk line incoming detection unit 410 for detecting whether a trunk line call is received, and an internet phone that generates an alarm sound to notify an external telephone when an incoming call is received during a trunk line call. Incoming alarm tone generating unit 412, 'hook off' detecting unit 414 for detecting whether the 'hook off' of the external telephone 330, and 'hook on' to notify the call setting request and termination to the CO line And a 'hook on and off' signal generator 416 for generating a 'hook' signal. The PC interface 310 is connected to a PC through a serial or parallel communication port to interface data transmitted / received between the telephone interface device 300 and the PC. The controller 308 controls the switching operation of the relays 302, 304, 306, 322, 324 and the overall operation of the telephone interface device 300 according to each mode of the telephone interface device, and stores an operation program and various reference data. A memory for temporarily storing data generated while performing various operations in the telephone interface device 300 according to a program is provided therein.

The DTMF transmitter 314 generates a DTMF tone signal corresponding to the telephone number of the trunk line subscriber requested by the Internet subscriber in the relay mode for direct communication between the Internet and trunk lines under the control of the controller 320. The DTMF receiver 316 converts the DTMF tone signal received from the CO line subscriber into the telephone number or IP number of the called Internet subscriber in the relay mode for the direct call between the Internet and the trunk line under the control of the controller 320. It applies to the control unit 320. The voice synthesizing unit 318 reads from the memory a message indicating that the Internet telephone interface device 300 is currently in the relay mode and a message requesting a password, called party's phone number or IP number when there is a trunk line call in the relay mode. Synthesize and send to subscribers. The call connection unit 312 is connected between the fourth and fifth relays 322 and 324, the trunk line call processing unit 310, the internet call processing unit 308, the DTMF transmission and reception unit 314 and 316, and the Internet telephone interface device 300. Set the connection between the blocks according to the set operation mode.

FIG. 5 illustrates a detailed internal circuit configuration of the call connection unit 312 of FIG. 3 according to an embodiment of the present invention. Referring to FIG. 5, the call connection unit 312 according to an exemplary embodiment of the present invention is configured with four logical sum elements therein. The first logical sum element 502 logically sums the audio signal A3 of the Internet subscriber which is the output of the fourth relay 322 and the audio signal A2 of the subscriber of the external telephone 330 which is the output of the Internet call processing unit 308. The signal A2 + A3 and the DTMF tone signal from the DTMF transmitter 314 are input and output to the subscriber of the trunk line through the trunk line call processor 310. The second logical element 504 inputs the audio signal A3 of the Internet subscriber, which is the output of the fourth relay 322, and the audio signal A1 of the trunk line, which is the output of the trunk line call processing unit 310, to perform a logical sum. The signal A1 + A3 is outputted to the external telephone subscriber via the internet call processing unit 308. The third logical element 506 is configured to output the audio signal A2 of the subscriber of the external telephone 330, which is the output of the Internet call processor 308, and the audio signal A1 of the trunk line-side subscriber, which is the output of the trunk line call processor 310. The signal A1 + A2 is inputted and output to the Internet subscriber via the fifth relay 324. The fourth logical element 508 is a DTMF tone signal and an internet call processing unit according to the Internet data signal output from the fourth relay 322 and the dial key input from the CO line subscriber outputted through the CO line call processing unit 310 ( The DTMF tone signal according to the dial key input from the subscriber of the external telephone 330 output through the 308 is logically outputted to the controller 330.

6A and 6B illustrate a block configuration of an internet telephone interface apparatus according to another embodiment of the present invention, which simplifies the connection between the PC and the external telephone by wirelessly connecting the PC and the external telephone 330. . 6A and 6B, the transmission and reception data between the PC and the external telephone are wirelessly processed, thereby simplifying the connection. That is, the wireless processing unit 602 in the wireless telephone apparatus 600 of the external telephone 330 side shown in FIG. 6A has three characters in the Internet telephone mode, the Internet-to-line relay mode, and the Internet-to-external telephone period. In the call mode, an audio signal input from the CO line or the external telephone 330 and various data signals applied from the controller 604 of the telephone wireless transmitter 600 are wirelessly transmitted to the PC-side PC wireless transmitter 606. An audio signal from an Internet subscriber transmitted wirelessly from the wireless processing unit 608 in the PC wireless transmission device 606 on the PC side and various data signals applied from the control unit 610 of the PC wireless transmission device 606 are received and the call connection unit ( 312) to the trunk line or the external telephone (330).

7 illustrates a configuration of an IP server system for implementing an Internet telephone using an IP address according to an embodiment of the present invention. Referring to FIG. 7, the phone number and IP relay server 408 according to an embodiment of the present invention may be connected to the PC number of members subscribed to the phone number and IP relay server system connected to the Internet through ISPs 118 and 120. The lookup table 412 in the database 410 as shown in FIG. 7 shows the floating or fixed IP number assigned to 400, 402, 404, 406, the identification (ID), the phone number, and the login status. If the other member's IP number is requested from any member, the member's login status, ID, telephone number, and IP number of the PC currently being used are retrieved from the database 410. Therefore, when implementing the Internet phone using IP, without having to check each other's IP number, it is possible to easily receive the Internet phone call using the IP provided from the phone number and IP number relay server 408.

8 is a flowchart illustrating an initial environment setting process for the operation of the Internet telephone interface apparatus according to an embodiment of the present invention.

First, if there is a key input for the PC power 'on' from the user is started in step (800). If there is a connection request from the user to the ISP, the PC proceeds to step 802 to access the requested ISP and obtain a unique IP number. Then, when the user wants to make an Internet phone call using an external telephone, the user executes an application program for operating the telephone interface device pre-programmed in a PC according to an embodiment of the present invention. Accordingly, in step 804, the PC displays the main menu screen of the telephone interface device application program on the monitor.

FIG. 9 illustrates an example of the application screen of the Internet telephone interface apparatus. As shown in FIG. 9, a main menu screen for controlling the main operation of the Internet telephone interface apparatus is displayed on the PC monitor screen. Accordingly, through the menu screen, the user can access an Internet telephone operator's server such as a dial pad or a large person, and perform an internet telephone call, and also through an internet telephone program using an IP such as NetMeeting. Internet phone calls can be made by entering the other party's phone number or IP number without accessing the server in advance.

Hereinafter, referring to the operation of the main menu screen shown in FIG. 9, the initial environment setting button may be used to set an initial driving condition of the Internet telephone interface device (900) to set an initial driving condition of the Internet telephone interface device (300). For select button. Updating the phone number and IP 902 is a selection button for accessing the phone number and IP relay server 408 to update the phone number and IP number of those who want to know, and on the main menu screen, the phone and IP number section 904 ) The result is displayed on the display screen.

An external telephone trunk line connection 906 is a selection button for setting the trunk line telephone mode to the telephone interface device 300 for connecting the external telephone 330 to the trunk line. The external telephone internet connection 908 is a selection button for setting the internet telephone mode to the telephone interface device 300 for connecting the external telephone 330 to the Internet. The three-way call during the Internet-line-external telephone call period 910 is a selection button for setting the three-way call mode in the Internet telephone interface device 300 so as to perform the three-way call during the Internet-line-external call. Internet-line two-way call 912 is a selection button for setting the two-way call mode in the Internet telephone interface device 300 to perform a two-way call between the Internet and the main line. The direct connection between the Internet and the trunk line 914 is a selection button for setting a relay mode for a direct call between the Internet subscriber and the trunk line subscriber through the Internet telephone interface 300 without the adjustment of the external telephone subscriber.

The phone number input screen 918 is a screen for inputting a phone number of the counterpart who wants to make a phone call through the Internet, and the IP number input screen 920 is a screen for inputting an IP number of the counterpart to make a phone call through the Internet. . That is, the user enters the telephone number or IP number of the counterpart in the telephone number and IP number input box and presses the connect button to perform an internet telephone call with the counterpart. Phone and IP search screen (916) is a screen for searching the phone number and IP number of a specific member to enter the member's name and ID (ID) after entering the search start button, the phone number and IP relay server ( 408, the member's phone number and IP number are retrieved and displayed. At this time, in order to basically operate the telephone interface device 200, various initial environments should be set in the initial environment setting screen on the main menu screen. That is, the user selects the initial environment setting button 900 of the main menu screen as shown in FIG. 9 displayed in step 804 to set various initial environments of the application program of the phone interface device 300. Will be done. Accordingly, in response to the selection of the initial configuration menu, the application program of the telephone interface device 300 proceeds to step 806 to display the initial configuration screen of the telephone interface device 300.

FIG. 10 illustrates an initial configuration screen of the telephone interface device 300 according to an embodiment of the present invention. As shown in FIG. 10, the initial configuration screen of the telephone interface device 300 is an external phone 330. Basic telephone transmission path setting screen (930), transmission path change code setting screen (932), Internet telephone service provider connection priority setting screen (934), adding an Internet telephone service provider (940), IP access Software priority setting screen 936, adding IP access software 942, and password setting screen 938 for direct Internet-to-line calls.

Therefore, the user can change the initial environment setting of the telephone interface device 300 by inputting the desired data in the corresponding screen of the initial environment setting screen as shown in FIG. That is, when the user sets the default telephone transmission path of the external telephone 330 to the trunk line or the Internet, the application program receives the change of the transmission path in step 808 in response to the telephone interface device 300. This will apply. In addition, when the user changes and sets the phone transmission path change code, the application program receives the change of the transmission path change code in step 810 and applies it to the phone interface device 300. In addition, when the user changes the Internet phone provider connection priority or IP access software priority setting, the application responds to the change in the Internet phone service provider connection priority or IP access software in step 812. The telephone interface device 300 is applied to. When the user adds the Internet telephone service provider or the IP access software, the application program responds to the telephone interface device 300 to apply the additional information of the Internet telephone service provider or the IP access software at step 814. If the user changes the password on the password setting screen 938 for direct connection between the Internet and the trunk line, the application responds to the change of the password for the direct connection between the Internet and trunk line in step 816 in the telephone interface. To the device 300.

As described above, the user can directly select various necessary initial setting items and apply them to the telephone interface device 300. In the embodiment of the present invention, a process of changing and setting five initial environment settings will be described as an example. However, other initial environment settings can be changed and set through the same process as above.

FIG. 11 is a flowchart illustrating a processing flow for a three-way call in an Internet telephone line-outside telephone line in an Internet telephone interface device according to an exemplary embodiment of the present invention. The operation according to the flowchart is performed by the control unit 320 of the Internet telephone interface device 300 of FIG. Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 3 and 11.

First, the control unit 320 of the telephone interface device 300 receives the initial environment setting set in the initial environment setting process of FIG. 8 from the application program of the phone interface device 300 in the PC and transmits the initial call of the external phone 330. Determine the route. At this time, if the transmission path of the external telephone 330 is set as the transmission path in the trunk line telephone mode, the control unit 320 proceeds to step 1102 in response to this in step 1100 and the trunk line and the external telephone 330. Control the switching of the relays 302, 304, 306 such that. That is, switching is controlled such that the first relay 302 and the second relay 304 are in the closed state and the third relay 306 is in the open state. Accordingly, in step 1104, when the user does not use the Internet telephone, the user can perform a telephone call with the subscriber line through the connection transmission path set as usual.

Subsequently, the control unit 320 proceeds to step 1106 to check whether the external telephone 330 connected to the trunk line is currently in a call, and at the end of the call, whether the telephone and the Internet phone are received through the external trunk line in the trunk line mode. Wait On the contrary, when the external telephone 330 receives an Internet phone call during a CO line call, the control unit 320 proceeds to step 1110 in response to this at step 1108 to control the CO line call processor 310 to make a call. The external telephone 330 sends an alarm sound indicating that the Internet call has been received. Accordingly, the user recognizes the reception of the Internet call during the CO line call through the alarm sound, and if necessary, may wait for the CO line call and then receive the Internet call. The second relay 304 is opened and the third relay 306 is switched to the closed state in order to wait for a trunk line and receive an Internet call. Input the transmission path change code requesting the switch 304, 306 to switch to the Internet telephony mode by a combination of dial keys, and the controller 320 recognizes the switching of the second and third relays 304 and 306. Switch to the state for Internet telephony mode. The dial key is, for example, '###...' '***…' typed '*' or multiple times in a row It may be implemented in various forms according to the user's setting, such as'.

Accordingly, when there is no dial key input requesting the user to switch to the Internet telephony mode in step 1112, the controller 320 returns to step 1104 to perform steps 1104 to 1110. While notifying the user that an internet phone call has been received, and if there is a dial key input requesting the user to change to the Internet phone mode from the user, proceeding to step 1112 to 1114, the first relay 302 The second relay 304 is in an open state and the third relay 306 is switched in a closed state to connect the external telephone 330 to the Internet through the Internet call processor 308. In this case, the control unit 320 also controls switching of the fourth relay 322 and the fifth relay 324 to the call connection unit 312 for the Internet telephony mode. Accordingly, the user performs an internet telephone call with the counterpart side connected to the Internet through the external telephone 330 in step 1116. As described above, while performing an Internet telephone call with the other party connected to the Internet in the Internet telephony mode, the user must make a three-way call between the currently-capped CO line subscriber and the Internet subscriber or a two-way call between the Internet subscriber and the CO line subscriber. There are times. The three-way call refers to a simultaneous call between an Internet-line call and an external telephone subscriber according to an embodiment of the present invention, and the two-way call between Internet-line calls refers to the telephone interface device in a state where an external telephone subscriber is missing. 300) means internet-to-line telephone call.

Therefore, when a two-way call between an internet-line line or a three-way call of an internet-line line-outside telephone is required, the user inputs a dial pattern of a predetermined pattern as in the case of inputting a dial key for switching to the line-line phone mode. do. If there is an input of a dial key requesting a two-way call between the Internet and the trunk line from the user, the controller 320 proceeds to step 1120 in response to step 1118 and the first relay 302 is closed. The second relay 304 and the third relay 306 are controlled to be switched to the open state so as to connect the Internet to trunk lines. Accordingly, in step 1122, a telephone call is performed between the Internet subscriber and the trunk line subscriber. Subsequently, the control unit 320 proceeds to step 1122 to check whether the two-way call between the Internet and the trunk line is terminated, and terminates the operation and returns to the default mode at the end of the call.

On the contrary, if there is an input of a dial key requesting a three-way call from the user during the Internet telephone call in step 1116, the control unit 320 responds to this in step 1126. Proceed to step 1128). Subsequently, the control unit 320 switches and controls the first relay 302 and the third relay 306 to the closed state and the second relay 304 to the open state in operation 1128. Form a currency path. Accordingly, in step 1130, the three-way call of the Internet-line line-external telephone period is performed. In this case, the user, that is, the external telephone subscriber, returns to the two-way call mode or the co-line-outline telephone line 2 from the three-way call state. You may request to switch to the active call mode. Therefore, if there is a two-way call request dial key input from the user during the three-way call, the control unit 320 proceeds to step 1120 in response to this in step 1132 and again performs the Internet-line call. Conduct a two-way call. On the contrary, if there is a dial key input for requesting a two-way call during the CO line-outside telephone call, the control unit 320 proceeds to step 1142 in response to the first, second, and third relays (1134). 302, 304, and 306 are switched to the state of the trunk line telephone mode to connect the trunk line-outside telephone line call path to perform the trunk line-outside telephone line telephone call.

On the contrary, if there is no input of a dial key for requesting a call mode switching from the user, the control unit 320 proceeds to step 1136 and examines whether the three-way call of the Internet, trunk line, and external telephone period ends. Terminate operation and return to default mode. On the contrary, when there is a dial key input for requesting the user to switch to the trunk line telephone mode or the internet-outside telephone call is terminated during the internet telephone call in step 1116, the control unit 320 proceeds to step 1138. Or in response to this in step 1140. Subsequently, the control unit 320 switches the first, second, and third relays 302, 304, and 306 to the state of the trunk line telephone mode in step 1142, connects the external telephone 330 to the trunk line, and then reconnects the trunk line to the outside line. Make phone calls possible.

12A and 13B illustrate an operation control flow in a relay mode for direct call between Internet and trunk line in an Internet telephone interface device according to an embodiment of the present invention. Hereinafter, a direct call operation between the Internet and a trunk line according to an embodiment of the present invention will be described in detail with reference to FIGS. 3, 12A, and 12B.

First, referring to FIG. 12A, a direct call operation between the Internet and the trunk line when the Internet telephone call is generated in the relay mode will be described first. First, the control unit 320 of the telephone interface device 300 performs the telephone interface device in step 1200. It is checked whether or not 300 is set to the relay mode. As described above, the relay mode is a mode implemented to enable direct communication between the Internet and trunk lines without adjustment of the external telephone user.

At this time, if the telephone interface device 300 is set to the relay mode, the control unit 320 proceeds to step 1202 and the first relay 302 and the third relay 306 are in a closed state, and the second relay ( 304 is controlled to switch to the open state. Then, the control unit 320 proceeds to step 1202 to check whether the Internet phone is incoming. In this case, if the Internet phone is received in step 1204, the control unit 320 proceeds to step 1206 and transmits a password request message for internet-to-line relay to the calling Internet subscriber. Accordingly, the Internet subscriber inputs the corresponding password in response to the password request message. The control unit 320 receives the password from the Internet subscriber in step 1208, and the password is input to the external phone 330 in step 1210. Check whether the password matches the preset password by the user. At this time, if the password does not match, the control unit 320 proceeds to step 1206 and requests a password again to receive a new password from the Internet subscriber. On the contrary, if the password inputted from the Internet subscriber in step 1210 matches the password preset by the user of the external telephone 330, the control unit 320 proceeds to step 1212, where the trunk line to be connected to the Internet subscriber. Require a phone number. Accordingly, the Internet subscriber enters the external trunk line telephone number to be connected through the telephone interface device 300, and the control unit 320 receives the trunk line telephone number from the Internet subscriber in step 1214 in response. Subsequently, the controller 320 proceeds to step 1216 to control switching to connect to the call connection unit 312. Subsequently, the control unit 320 proceeds to step 1222 and determines whether a call path with the trunk line subscriber of the corresponding trunk line telephone number is formed.

In this case, if the call path with the corresponding CO line subscriber is not established, the controller 320 proceeds to step 1224 and checks whether the Internet subscriber has terminated the connection, and thus the call path is not formed until a predetermined time elapses. Therefore, if the Internet subscriber terminates the connection, the internet- trunk line relay mode operation ends and returns to the standby state. On the contrary, when a call is made with the CO line in step 1222, a direct telephone call is performed between the calling party's Internet subscriber and the called party's CO line subscriber in step 1226, and then the control unit 320 performs step 1228. Checks whether the internet-to-line direct call is terminated. At this time, if the direct call between the Internet and the trunk line is terminated, the control unit 320 proceeds to step 1230 and controls the 'hook on / off' generation unit in the trunk line call processing unit 310 to transmit a 'hook on' signal to the trunk line. It transmits to notify the CO line that the call has ended and ends the operation for direct call between the Internet and CO line.

Next, referring to FIG. 12B, a direct call operation between the Internet and the trunk line when the trunk line is received in the relay mode will be described. In step 1204, the controller 320 determines that the Internet phone is not received. Proceeding to step 1232, it is checked whether an incoming call is generated. In this case, if the CO line is not received, the controller 320 proceeds to step 1234 to perform a corresponding operation according to a user's manipulation. On the contrary, when a call is received from the CO line in step 1232, the controller 320 proceeds to step 1236 and controls the 'hook on / off' generation unit 416 in the CO line call processing unit 310 to control the CO line. To generate a 'hook off' signal. Subsequently, the control unit 320 proceeds to step 1238 and requests a message indicating that the Internet telephone interface device 300 is currently set to the relay mode and inputting a password for the relay mode to the calling trunk line. Accordingly, the calling party line subscriber enters the corresponding password in response to the password request message when he / she wants to call the other party's subscriber via the Internet using the relay function of the Internet telephone interface device 300.

Then, the controller 320 receives the password from the CO line subscriber in step 1242 and checks whether the password matches the password preset in the Internet telephone interface device 300 in step 1244. At this time, if the password does not match, the control unit 320 returns to step 1240 to perform steps 1240 to 1242 again. On the contrary, if the password inputted from the CO line subscriber in step 1244 matches the preset password, the control unit 320 proceeds to step 1246 and the phone number of the subscriber of the other party to make a call over the Internet. Send a message to the CO line subscriber requesting to enter an IP number. Accordingly, the CO line subscriber enters a phone number or IP number of the other party to make a call through the Internet in response to the request message. In step 1248, the control unit 320 inputs a phone number or the phone number from the CO line. Enter the IP number. If the dialed number input from the CO line is the other party's phone number, the controller 320 proceeds to step 1252 in response to step 1250. It automatically connects to the internet phone operator server designated as priority by the user in the initial configuration. Subsequently, the controller 320 requests a connection to the other party's telephone number through the server in step 1254. Accordingly, the internet phone service provider forms an internet phone call path between the other party of the requested phone number and the user.

On the contrary, if the dial number from the CO line subscriber is the other party's IP number, the control unit 320 proceeds to step 1258 in response to step 1256 and connects to the Internet telephone service provider server using the IP number. Internet connection directly to the other party corresponding to the IP number through the ISP (118,120). In operation 1260, the controller 320 determines whether a call path is formed between the originating CO line subscriber and the counterpart Internet subscriber.

In this case, if a call path is not established between the calling party line subscriber and the other party's Internet subscriber, the control unit 320 proceeds to step 1262 in which a check is made to determine whether the subscriber line terminates the connection and a predetermined time elapses. When the CO line subscriber terminates the connection because the path is not established, the relay operation is terminated after returning to the standby mode. In contrast, when a call is formed between the calling party line subscriber and the other party's Internet subscriber in step 1260, a direct telephone call is performed between the calling party line subscriber and the called party Internet subscriber in step 1264. In step 1266, the method determines whether the direct call between the Internet and the trunk line ends. In this case, if the direct call between the Internet and the trunk line is terminated, the control unit 320 proceeds to step 1268 and controls the 'hook on and off' generation unit 416 in the trunk line call processing unit 310 to 'hook on'. 'The signal is sent to the CO line to notify the CO line that the call has ended, and the operation for the direct call between the Internet and the CO line ends.

As described above, the present invention has an advantage of enabling an internet telephone call using an external telephone, and also enables three-way telephone call of the Internet-Cooking Line-External telephone call when necessary for the Internet-Cooking Line or the C-line call. And it is possible to greatly increase the convenience of use by enabling the relay operation for direct call between the Internet and the trunk line without the adjustment of the external telephone user.

Claims (22)

An internet telephone interface device for making an internet telephone call using an external telephone, An audio call processor for transmitting an audio output signal received from an external terminal device to a handset of the external telephone, and applying the audio input signal received from the external telephone to an audio input terminal of an external connection device; A trunk line call processing unit for detecting a 'hook off' of the external telephone and detecting whether a call is received from a trunk line; A DTMF receiver for receiving a DTMF tone signal of a dial key input from the external telephone and a trunk line; A DTMF transmitter which generates and transmits a DTMF tone signal corresponding to a trunk line telephone number requested from the Internet subscriber through the external terminal device to the trunk line; A first switching unit configured to switch between the trunk line and the trunk line call processing unit; A second switching unit for switching connecting the external telephone with a trunk line; A third switching unit for switching the external telephone and the internet call processing unit; A fourth switching unit for selectively switching the audio signal output terminal of the external terminal device to the speaker and the call connection unit of the external terminal device; A fifth switching unit for selectively switching the audio signal input terminal of the external terminal device to the microphone and the call connection unit of the external terminal device; A call connection unit connected between the fourth / fifth switching unit, the Internet / trunk line call processing unit, and DTMF transmission / reception unit to interface audio / data signals transmitted / received through the Internet, trunk lines, and external telephone lines; The operation of each unit is controlled, and the first and second switching units are controlled in the trunk line telephone mode to connect the external telephone to the trunk line and the trunk line telephone processing unit, and the second and third switching units in the internet telephone mode. A control unit for controlling switching the external telephone from the trunk line to the internet call processing unit and controlling the fourth and fifth switching units to switch the audio signal input / output terminals of the external terminal device to the call connection unit; And an I / O interface unit for interfacing data transmitted / received between the external terminal device and the telephone interface device. According to claim 1, The Internet telephone interface device, When the trunk line call is received in the relay mode, the trunk line call is synthesized by voice synthesis of a message indicating that the Internet telephone interface device is currently set to the relay mode under the control of the controller, and a message for inputting a password for subscriber authentication. An internet telephone interface device, characterized in that it further comprises a voice synthesis unit for transmitting to the trunk line through the processing unit. The method of claim 1, wherein the control unit, In the three-way call mode of the Internet, trunk line, and external telephone period, the second switching unit is controlled to cut off a direct connection call line between the external telephone and the trunk line, and the first and third switching units are controlled to control the trunk line and the trunk line call processing unit. And forming a call line between the external telephone and the internet call processor. The method of claim 1, wherein the control unit, In the relay mode for direct communication between the Internet and trunk lines, the fourth and fifth switching units are controlled to switch the audio signal input / output terminals of the external terminal device to the call connection unit and to control the first and third switching units. And switching the connection between the trunk line and the trunk line call processing unit and the external telephone with the Internet call processing unit to form a call line between the Internet and the trunk line. The method of claim 1, wherein the Internet call processing unit, A subscriber line matching unit for matching subscriber lines between the external terminal and the external telephone; A ring tone generating unit for generating a ring tone for informing the incoming call to the external telephone when an internet call is received; An incoming call alarm tone generating unit for generating an alarm sound to notify the external telephone when a call is received during an internet phone call; A 'hook off' detector for detecting whether the external telephone is 'hook off'; And at least a call waiting sound generator for transmitting a call waiting sound to the external phone when the hook-up of the external telephone is performed. The method of claim 1, wherein the trunk line call processing unit, A trunk line incoming call detection unit that detects trunk line incoming calls; Internet call incoming alarm sound generating unit for generating an alarm sound to notify the external phone when the incoming call during the telephone line call, A 'hook off' detector for detecting whether the external telephone is 'hook off'; And at least a hook on / off generator for generating and transmitting a hook on / off signal to the trunk line in the relay mode. The method of claim 1, wherein the switching unit, An internet telephony interface device comprising a relay element. The method of claim 1, wherein the call connection portion, A first logical element which logically combines an audio signal from the Internet, which is an output of the fourth switching unit, an audio signal from the external telephone, which is an output of the internet call processing unit, and a DTMF tone signal from the DTMF transmitting unit, and outputs the DTMF tone signal to the trunk line call processing unit; Wow, A second logical sum element which logically combines an audio signal from the internet, which is an output of the fourth switching unit, and an audio signal from a trunk line, which is an output of the trunk line call processing unit, and outputs the logical signal to the internet call processing unit; A third logic element for outputting an audio signal from the external telephone, which is an output of the internet call processor, and an audio signal from a trunk line, which is an output of the trunk line call processor, to the Internet through the fifth switching unit; And a fourth logical sum element configured to logically combine an audio signal from the internet, which is an output of the fourth switching unit, and a DTMF tone signal from the trunk line and an external telephone, and output the same to the controller through the DTMF receiver. . An internet telephone interface device for making an internet telephone call using an external telephone, An external terminal device connected to an external terminal device and wirelessly transmitting an audio / data signal received from the Internet to the external phone, and receiving audio / data signals from the external phone and a trunk line wirelessly transmitted from the external phone. A terminal-side wireless transmitter for transmitting to the Internet connected to the terminal; Is connected to the external telephone, receives the audio / data signal transmitted wirelessly from the terminal-side wireless transmitter, and transmits the audio / data signal to the external telephone or trunk line, and wirelessly transmits the audio / data signal received from the trunk line and the external telephone. An Internet telephone interface device, comprising: a telephone wireless transmission device for transmitting to a side wireless transmission device. 10. The method of claim 9, The terminal-side wireless transmitter, A wireless processor for wirelessly processing the audio / data signal received from the Internet and wirelessly transmitting the audio / data signal to the telephone wireless transmitter, and receiving the audio / data signal from the external telephone and a trunk line received from the telephone wireless transmitter; A fourth switching unit for selectively switching the audio signal output terminal of the external terminal device to the speaker and the wireless processing unit of the external terminal device; A fifth switching unit for selectively switching and connecting the audio signal input terminal of the external terminal device to the microphone and the wireless processing unit of the external terminal device; An I / O interface unit for interfacing data transmitted / received between the external terminal device and the terminal-side transmission device; When the Internet phone interface device is set to one of the Internet phone mode, the three-way call mode, the relay mode is configured to control the fourth and fifth switching unit to control the audio / data signal from the Internet to the wireless processing unit An Internet telephone interface device. The telephone wireless transmitter of claim 9, A wireless processing unit which receives audio / data signals from the Internet wirelessly transmitted from the terminal-side wireless transmitter, and wirelessly processes audio / data signals received from the external telephone and a trunk line, and wirelessly transmits them to the terminal-side wireless transmitter; An internet call processing unit for transmitting the audio output signal from the wireless processing unit to a receiver of the external telephone and outputting the audio input signal received from the external telephone to the wireless processing unit; A trunk line call processing unit for detecting a 'hook off' of the external telephone and detecting whether a call is received from a trunk line; A DTMF receiver for receiving a DTMF tone signal of a dial key input from the external telephone and a trunk line; A DTMF transmitter which generates and transmits a DTMF tone signal corresponding to the trunk line telephone number requested from the Internet subscriber to the trunk line, received from the wireless processor; A call connection unit connected between the wireless processing unit, the Internet / trunk line call processing unit, and a DTMF transmitting / receiving unit to interface audio / data signals transmitted / received by a wireless processing unit, trunk line, and external telephone periods; A first switching unit configured to switch between the trunk line and the trunk line call processing unit; A second switching unit for switching connecting the external telephone with a trunk line; A third switching unit for switching the external telephone and the internet call processing unit; Controls the operation of each unit, and controls the first and second switching unit in the trunk line telephone mode to connect the external telephone to the trunk line and the trunk line call processing unit, and in the Internet telephone mode, the second and third switching unit. And a control unit for controlling and switching the external telephone from the trunk line to the internet call processing unit. The method of claim 11, wherein the telephone wireless transmitter, When the trunk line call is received in the relay mode, the trunk line call is synthesized by voice synthesis of a message indicating that the Internet telephone interface device is currently set to the relay mode under the control of the controller, and a message for inputting a password for subscriber authentication. An internet telephone interface device, characterized in that it further comprises a voice synthesis unit for transmitting to the trunk line through the processing unit. 10. The method of claim 1 or 9, wherein the external terminal device, Internet phone interface device characterized in that the personal computer (PC). In the three-way calling method in the Internet phone interface device, A process of informing the user of an incoming call through an alarm during an incoming call to an external terminal device during a trunk line call; Checking whether there is a request to switch to the Internet phone mode from the user who responds to the Internet phone call; Controlling the second switching unit to cut off the trunk line and the external telephone call line and control the third switching unit to form a call path between the external telephone and the Internet when there is a request for switching to the Internet telephone mode; , In the case of the user requesting to switch to the three-way call mode of the Internet-line line-external call during the Internet phone call with the Internet subscriber, a process of forming the Internet-line line-external call line How to implement a three-way call in the Internet phone interface device. The method of claim 14, When a call from a CO line is received during an internet phone call, a process of notifying the user through an alarm tone; Checking whether there is a request to switch to the trunk line telephone mode from a user who responds to the trunk line telephone call; When there is a request to switch to the trunk line telephone mode, the third switching unit is controlled to cut off the call line between the Internet call processor and the external telephone, and the first and second switching units are controlled to connect the trunk line to the trunk line call processor. To form the Internet-to-line call path; When the user requests to switch to the three-way call mode during the trunk line telephone call with the trunk line subscriber, the second switching unit is controlled to cut off the call line between the trunk line and the external telephone. And controlling the third switching unit to connect the trunk line and the external telephone to the trunk line call processing unit and the internet call processing unit, respectively, to form the Internet-line line-external telephone period call path. How to implement 3rd party currency. The method according to claim 14 or 15, When the user requests to switch to the two-way call mode between the Internet and the main line during the three-way call during the Internet-line call-external telephone period, the third switching unit is controlled to cut off the call line between the external telephone and the internet call processor. And forming a call line only between the internet and the trunk line. In the Internet-line direct call method in the Internet telephone interface device, Connecting the trunk line and the external telephone to the trunk line call processing unit and the internet call processing unit by controlling the first and third switching units when the relay mode for the direct call between the Internet and the trunk line is set in the Internet telephone interface device; , Authenticating the caller's Internet subscriber when an Internet telephone call occurs in the relay mode; Receiving the requested trunk line number from the authenticated Internet subscriber; Generating a 'hook off' signal to the trunk line and transmitting a DTMF tone signal corresponding to the received telephone number and waiting for a call to the trunk line; The method of implementing a direct call between the Internet and the trunk line in the Internet telephone interface device, characterized in that the process of performing a direct call between the Internet and the trunk line when setting up a call with the trunk line. The method of claim 17, wherein the Internet subscriber authentication process, Requesting a password for a direct call between the Internet and a trunk line to the calling party when the Internet is called; And receiving the password from the Internet subscriber in response to the request and authenticating the Internet subscriber as a legitimate subscriber only when the password matches a preset password. The method of claim 17, If the call path is not formed to pass the predetermined time between the Internet and the trunk line, checking whether the calling Internet subscriber is disconnected; If the Internet subscriber terminates the connection before the call is established, the Internet-line direct call implementation method characterized in that it further comprises the step of terminating the direct call operation. The method of claim 17, In the relay mode, when a trunk line call is received, generating a 'hook off' signal to form a communication path with the trunk line; Authenticating the originating trunk line subscriber; Receiving the called party's telephone number or IP number from the authenticated trunk line subscriber; If the other party's telephone number or IP number is the other party's telephone number, the Internet telephone interface apparatus further comprises the step of forming a call path with the corresponding Internet subscriber through a predetermined Internet telephone service provider server. How to implement direct call between trunk lines. The method of claim 20, If the other party's telephone number or IP number is the other party's IP number, further comprising forming a direct call path with the Internet subscriber of the IP number through a predetermined IP access software. Method for implementing internet-to-line direct call in device. The method of claim 20 or 21, If the call path is not formed to pass the predetermined time between the Internet and the trunk line, checking whether the originating trunk line subscriber is disconnected; The method of implementing a direct call between Internet and trunk lines, characterized in that the method further comprises the step of terminating the direct call operation between the Internet and the trunk line when the CO line subscriber terminates the connection before setting the call.