KR20030007362A - Multi-function public phone system having picture communication and data received function and method of the same - Google Patents

Abstract

PURPOSE: A multi-terminal system having video speech and incoming functions and a method for providing the same are provided to perform real-time video speech as well as voice speech between multi-terminals and between a multi-terminal and a mobile terminal. Also, the system and method are provided to perform the video speech by using the incoming function of multi-terminals, even when a user does not have a video speech unit. CONSTITUTION: Multi-terminals(B1-Bn) perform voice speech by having each own incoming number. And each multi-terminal(B1-Bn) has a Web camera for video capture therein and code switching algorithm for remote transmission of video data, and has a video output window for outputting transmitted video data. Exchanges(40a-40n) connect calls as the incoming numbers respectively assigned to the multi-terminals(B1-Bn) are pre-registered in a database. Mobile communication terminals(A1-An) attempt call connection using the incoming numbers of the multi-terminals(B1-Bn), and perform video speech. Base stations(10a-10n) and a repeater(20) are for relaying transmission data from the mobile communication terminals(A1-An) to the multi-terminals(B1-Bn). And a connection repeater(30) is arranged.

Description

MULTI-FUNCTION PUBLIC PHONE SYSTEM HAVING PICTURE COMMUNICATION AND DATA RECEIVED FUNCTION AND METHOD OF THE SAME}

The present invention relates to a multi-terminal system having a video call and a call forwarding function and a method of providing the same. More particularly, the present invention relates to a real-time video call between a multi-terminal and a real-time video call. A multi-terminal system having a video call and a call forwarding function, which enables to make a voice call and enables a video call using a call forwarding function of a multi-terminal even when a user does not have a video call means and a method of providing the same. It is about.

As is well known, a number of roadside phones are installed on each side of the road to allow the public to make public phone calls or pay phone cards. Due to the construction of the infrastructure and solutions accordingly, the Internet communication is being developed popularly.

Internet communication is popularly a concept of a PC room, and service is provided with a LAN network for each regional unit.

However, unlike the online games, the PC room does not have much time to use the Internet, or when it is necessary to check e-mails on the roadside, the PC room is not widely distributed by region. It was very hard to use a PC room.

In addition, in the case of the PC room, voice calls through the public telephone network (PSTN) is not possible, the settlement is made in units of time even when billing, there was a disadvantage that only means of payment can be cash.

Therefore, the present applicant has filed a patent for the "multimedia public terminal system and its operation method" to solve this problem.

Hereinafter, the present invention will be described in detail with respect to the multimedia air terminal system and the method of operation of the present applicant with reference to FIGS.

In addition to providing a voice call service provided by a public payphone, the multimedia public terminal system 2 can access a remote server for access and processing of various types of information by accessing the Internet network. It is connected with a plurality of financial servers (not shown) for electronic settlement of the furnace.

In addition, the public terminal system 2 is capable of payment for the usage fee by inputting a variety of payment means, for example, as the payment means various electronic money or general public telephone card, transportation card, credit card, debit card and cash You can pay the fee freely. In particular, the multimedia public terminal system 2 according to the present invention may be charged a different usage fee for the voice call through the PSTN network and the Internet communication fee through the XDSL network.

The multimedia public terminal system (2) supports not only voice calls but also real-time video call services, and it is very useful when a mail service is needed at the roadside because it is possible to create a video e-mail and a general e-mail. Can be.

More specifically, the multimedia public terminal system 2 is provided with a terminal management area 4 therein to manage a multimedia public terminal distributed in multiple areas, each multimedia public terminal has a unique telephone number It is provided and connection from an external terminal is possible. That is, if the first subscriber 12 is located in a specific multimedia public terminal and the second subscriber 14 recognizes the telephone number of the multimedia public terminal, the second subscriber 14 calls the multimedia public terminal. A voice call and a video call can be made with the first subscriber 12 by connecting.

In addition, the multimedia air terminal system 2 is provided with a data interface area 6 therein, the data interface area 6 is the second subscriber (specific data transmitted from the first subscriber 12) If you need to interface to 14), perform data interface.

On the other hand, the multimedia public terminal system 2 is provided with an Internet billing area 8 therein, the Internet billing area 8 receives the data on the Internet usage time from the PSTN network switch 16 side This is an area where the subscriber's Internet usage fee is settled and billed for.

In addition, the multimedia public terminal system 2 is provided with a voice call charging area 10 therein, the voice call charging area 10 is the voice call usage time and connection area from the PSTN network switch 16 side. It is the area to receive the information and settle the voice call usage fee of the subscriber.

Figure 2 is a block diagram showing the configuration of a conventional multimedia air terminal system.

Referring to this, the multimedia air terminal system is provided with a plurality of multimedia air terminals (A1 to An) distributed and disposed on the roadside in the multi-region, the multimedia air terminal (A1 to An) is the multimedia air terminal via a web network Because it is connected to the management server (MPMS) and managed, it transmits various data available for Internet operation and reading to a specific PC or server (S1) remotely separated.

Therefore, the multimedia public terminals A1 to An can access various servers S1 providing a plurality of Internet information, browse information registered in the server S1, and can download in real time. In addition, the downloaded information may be transmitted to the subscriber's e-mail via the web network again.

Meanwhile, the multimedia public terminals A1 to An can make voice calls with various telephone terminals T1 remotely spaced through a PSTN network, which is a function of a general public telephone. Omit.

Further, since the multimedia public terminals A1 to An use different networks for internet communication and voice call, voice calls can be simultaneously executed through a PSTN network during internet communication through the web network.

3 is a perspective view showing the appearance of a multimedia public terminal.

Referring to this, the multimedia public telephone terminal A is a terminal installed in a public telephone booth so that subscribers can make voice calls and Internet communications, and the multimedia public telephone terminal A enables video calls together with voice calls. Each terminal is provided with a unique telephone number so that an external third party can access the multimedia public telephone terminal A in a specific region.

In addition, the multimedia public telephone terminal A can surf the Internet and create and send e-mails, and in particular, can create and send video and voice e-mails.

The multimedia public telephone terminal (A) is formed in the form of a rectangular telephone terminal outside, the handset 20 for voice call is installed on one side, the front predetermined portion for inserting cards and coins Inlets 22 and 24 are provided, respectively.

In addition, the multimedia public telephone terminal A is provided with a key operation button 26 for operating various keys of handset and internet communication on the front thereof, and a coin outlet 28 is formed at the bottom thereof.

On the other hand, the multimedia public telephone terminal A is provided with a touch button 30 for outputting various information for dial-up and voice communication for a voice call on a predetermined front part thereof, and scanning an image of the caller on the upper part thereof. Web camera 32 is provided.

4 is a block diagram showing the circuit configuration of the multimedia public terminal.

Referring to this, the multimedia air terminal (A) is composed of a voice input unit, card recognition unit, coin input recognition unit, key operation unit, web camera, display unit, display driver, voice output unit, voice output driver, data storage unit, control unit .

More specifically, reference numeral 20a denotes a voice input unit (e.g., a talker) for inputting voice data, reference numeral 20b denotes a voice output unit (e.g., a receiver) in which received voice data is output, and reference numeral 36 denotes An audio output driver for driving the audio output unit 20b is shown.

In addition, reference numeral 22 denotes a card recognition unit for recognizing a card inserted as one of the payment means for paying the use fee of the Internet and voice call, and reference numeral 24 denotes whether the coin is inserted or not when the coin is inserted. Coin input recognition part is shown.

Reference numeral 26 denotes a key operation unit for key operation such as connection and information viewing of various servers, selection and download of a specific file during Internet communication, and key operation of a dial button and a call button in a voice call.

Reference numeral 32 denotes a web camera for capturing a video of a subscriber and converting it into digital data. Reference numeral 30 denotes a display unit for outputting various information and displaying a call button display window, and reference numeral 34 denotes the display unit 30. A display driver for driving a.

In this case, the display unit 30 may be configured as a touch screen so that various key input signals selected by the display unit 30 may be input to the signal input terminal of the key manipulation unit 26.

Reference numeral 40 denotes a data storage unit for storing various programs necessary for a telephone circuit, an internet communication program, a data conversion program, etc., and reference numeral 42 denotes a method for performing internet communication, video communication, and voice call by receiving various key input signals. A control unit for controlling and controlling the state of the screen to be displayed.

5 is a diagram illustrating an output screen of the multimedia public terminal.

Referring to this, the screen 30 of the multimedia A terminal (A) is largely composed of a touch screen capable of a keyboard output and data input through the keyboard, the top of the predetermined portion is provided with a keyboard view button 50 And a search button 52 for starting the search.

In addition, the multimedia terminal A can support various languages. The main screen 30 of the multimedia terminal A is provided with a language changing button 54 for changing or selecting a language. Voice call button 56 is provided for. At this time, when the voice call button 56 is clicked while using the Internet, the dial input window 70 is output in the form of a pop-up window.

On the other hand, the multimedia public terminal (A) is interposed a dial call button 60 for voice calls. In addition, a direction key 62 for moving the screen up and down is formed, and the direction key 62 is larger than the size of the direction key of a general computer screen, so that a user easily clicks on the main screen 30 that is a touch screen. Direction can be moved.

Recently, a video call system through a web network has been developed so that a web camera can be mounted on the top of a computer terminal, and video data can be transmitted to a counterpart computer terminal along with a voice data through a USB port or a serial port. It became. However, such a video call system has a problem in that a large amount of time is required for an individual to construct a system, and a high cost is required.

Above all, even if a user has a video call system, there is a problem that video call is impossible if the other party does not have a video call system.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described prior art, and enables not only voice calls between multiple terminals, but also video calls in real time, and video calls and voice calls between multiple terminals and mobile terminals. It is an object of the present invention to provide a multi-terminal system having a video call and incoming call function and a method of providing the same, which allow a user to make a video call even when a user does not have a video call means.

1, 2, 3, 4, and 5 are views illustrating a configuration of a multi-terminal system and a use example thereof according to a conventional embodiment;

6A and 6B are schematic diagrams showing a schematic configuration of a multi-terminal system having a video call and incoming call function according to an embodiment of the present invention;

7 is a diagram illustrating a numbering state of a multi-terminal in a multi-terminal system having a video call and incoming function according to an embodiment of the present invention;

8 is a diagram illustrating a screen of a multi-terminal in a video call in a multi-terminal system having a video call and incoming function according to an embodiment of the present invention;

9 is a state diagram illustrating a video and audio data transmission state using a multi-terminal system having a video call and incoming function according to an embodiment of the present invention;

10A and 10B are flowcharts illustrating signal flows of a multi-terminal system having video call and incoming functions according to an embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

A1 to An: mobile communication terminal, B1 to Bn: multi terminal,

10a to 10n: base station, 20: repeater,

30: Connection repeater, 40a-40n: Exchanger.

In order to achieve the above object, according to a preferred embodiment of the present invention, in a multi-terminal system installed on the roadside to perform data communication through voice call and web network, a unique called number is assigned to each terminal to make a voice call. A multi-terminal having a web camera for capturing an image and a code conversion algorithm for remote transmission of image data, and having an image output window for outputting the transmitted image data therein; There is provided a multi-terminal system having a video call and incoming function, characterized in that the incoming number assigned to each of the multi-terminals is pre-registered in a database and constituted by an exchange to make a call connection.

Preferably, the image output window of the multi-terminal is divided into two is provided with a multi-terminal system having a video call and incoming function, characterized in that the image data to be transmitted and the received image data is divided and output to the same window.

On the other hand, the present invention is a process for recognizing a called number of a specific multi-terminal by any user who desires a call connection to the multi-terminal; Attempting a call connection by a corresponding user inputting the called number into the mobile communication terminal; When the call connection is made, each user making a voice call through the mobile communication terminal and the multi terminal; Generating, by the user, a video call request signal for the multi-terminal while the mobile communication terminal is capable of video call; Provided is a method of providing a video call and incoming call function of a multi-terminal system, wherein the multi-terminal receives a signal and captures and transmits an image of a user through a web camera.

On the other hand, the present invention is installed on the side of the multi-terminal system for the voice call and data communication through the web network, each terminal is assigned a unique call number can make a voice call, the web for image capture therein A multi-terminal having a code conversion algorithm for remote transmission of the camera and image data, and having an image output window for outputting the transmitted image data; An exchanger for making a call connection by registering a called number respectively assigned to the multi-terminal in a database; A mobile communication terminal for making a call connection using a called number of the multi terminal and making a video call; Provided is a multi-terminal system having a video call and incoming function, comprising a base station, a repeater, and a connection exchange for relaying transmission data from the mobile communication terminal to the multi-terminal.

On the other hand, the present invention is a process of attempting a call connection to a mobile communication terminal by a user using a multi-terminal; When the call connection is completed, making a voice call with the mobile communication terminal; Generating a video call request signal by the user using the multi-terminal; Checking, by the multi-terminal, whether the corresponding mobile communication terminal is capable of a video call; There is provided a method of providing a video call and incoming call function of a multi-terminal system, which comprises a video call or a process of outputting non-video call information to a screen of a multi-terminal.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail with reference to drawings.

6A and 6B are schematic diagrams showing a schematic configuration of a multi-terminal system having video call and incoming functions according to an embodiment of the present invention.

Referring to this, a multi-terminal system having a video call and incoming function according to an embodiment of the present invention attempts a video communication after attempting a call connection from a mobile communication terminal A1 to An to a specific multi-terminal B1 to Bn. I can do it. In this case, a web camera is mounted on the mobile communication terminals A1 to An, and the mobile communication terminals A1 to An capable of capturing image data can make a video call.

To this end, the present invention is provided with a mobile communication terminal (A1 to An) which is carried by any one user and is equipped with a web camera as shown in FIG. In order to enable voice and video calls of the communication terminals A1 to An, base stations 10a to 10n are provided for establishing radio networks of a predetermined radius for each region.

In addition, a repeater 20 for interpreting a signal based on the call connection request signal applied through the base stations 10a to 10n and executing call connection and data transmission / reception with a corresponding call connection target terminal is provided. A connection repeater 30 is provided for transmitting and receiving data through a call connection of a wired communication network. The connection repeater 30 converts and switches various data transmitted / received between the mobile communication network and the wired communication network.

On the other hand, in the present invention, a plurality of multi-terminals (B1 to Bn) provided on the roadside are classified and integrated into respective regional units, and the exchanges 40a to 40n for transmitting and receiving data to the multi-terminals (B1 to Bn) are provided. Will be provided. Since the switches 40a to 40n, the base stations 10a to 10n, and the repeaters 20 and 30 are means generally configured in the wired network network architecture, detailed description thereof will be omitted.

Therefore, even when a user possesses a mobile communication terminal which is not provided with a video call means, another user who possesses mobile communication terminals A1 to An equipped with video communication means is used by using the multi-terminals B1 to Bn. You can make a video call with the user.

In addition, the multi-terminals (B1 to Bn) exemplified in the present invention are provided with a unique telephone number to each of the multi-terminals (B1 to Bn) so that incoming calls can be made on the roadside. When a user having A1 to An desires to make a video call with another user, the user who is the target of the call informs the user who desires video communication the called number of a specific multi-terminal (B1 to Bn) to make a video call. I can do it.

On the other hand, as shown in Fig. 6B, a video call can be made between multiple terminals. In this case, the user is notified of a called number of a specific multi-terminal (for example, B1) from a user who does not have a video communication means. By using a multi-terminal (for example, B2), a video call can be made by attempting a call connection to the multi-terminal of the called party number.

7 is a diagram illustrating a numbering state of a multi-terminal in a multi-terminal system having a video call and incoming function according to an embodiment of the present invention.

Referring to this, the multi-terminals (B1 to Bn) applied to a multi-terminal system having a video call and incoming function according to an embodiment of the present invention are configured to enable a video call because a web camera is mounted therein. A user of the mobile communication terminals A1 to An, which is not provided with a video communication means, performs a video call with another user who desires to make a video call through the specific multi-terminals B1 to Bn. ) Is called separately.

This called number may be configured in the same form as a conventional landline telephone number, or may be configured in a somewhat different structure. In other words, the unique phone number can be assigned as in the existing landline phone numbering method. The representative number of the unique station number can be obtained through the representative number assignment method through the intelligent network such as 700 service and 1588 service. Each terminal can be assigned a unique number to its lower number, that is, to define a signal generated from the terminal and to establish a system that enables translation and switching of the signal. .

Further, the called number assigned to each of the multi-terminals B1 to Bn is registered in association with the IP address of each of the multi-terminals B1 to Bn, and the called number is displayed on the screen of the multi-terminals B1 to Bn. Alternatively, by printing and attaching to an external case of the multi-terminals B1 to Bn, the user can easily recognize the called number of the multi-terminals B1 to Bn and notify other users. Therefore, even when only one user is provided with the video call means, the incoming call can be performed by using the called number of the multi-terminals B1 to Bn installed on the side of the road.

8 is a diagram illustrating a screen of a multi-terminal in a video call in a multi-terminal system having a video call and incoming function according to an embodiment of the present invention.

Referring to this, the multi-terminal (B1 ~ Bn) having a video call and incoming function according to an embodiment of the present invention is the incoming call number uniquely donated to the main screen 50 when the user lifts the handset (E.g., 02-123-4567) is outputted, or the incoming telephone number is printed and attached to a predetermined portion of the outer case so that the user can easily recognize the incoming telephone number.

In addition, when a user inserts a coin and a card and makes a video call, a counterpart image talking to the user is output to a separate pop-up window 54, and a volume key 56 for adjusting a volume during a voice call is provided. It is done. In addition, the button key 58 is output by the touch screen method, and a specific telephone number can be touched and input.

Preferably, the plurality of image popup windows 54 may be divided into two windows so that the image data of the user to be transmitted is output in one window, and the image data of the received call recipient is output in another window. Such multi-terminals B1 to Bn are very convenient because the user can directly check how their own images are output.

It is preferable to insert a coin or a card and input a telephone number so that the image data of the user is output to the image popup window 54 by capturing the web camera before executing the call connection. In this case, you can check your appearance once again, and the user can further activate the wired call by the convenience of this function.

9 is a state diagram illustrating image and audio data transmission states using a multi-terminal system having video call and incoming functions according to an embodiment of the present invention.

Referring to FIG. 9, communication data flows between the multi-terminals B1 to Bn having video calling and incoming functions and the mobile communication terminals A1 to An equipped with video calling means according to an embodiment of the present invention with reference to FIG. 9. Describe.

A user 100 having a mobile communication terminal (e.g., A1) equipped with video communication means cannot use a mobile communication terminal (e.g., A1), which does not have a video communication means (e.g., A2). A voice call is made to the other user 200 who owns. At this time, the voice data is a voice call through the wireless communication network through the base station 10 and the repeater 20, when one user 100 desires a video call, the other user 200 is a corresponding user ( 100, the called party number of the multi-terminal (for example, B1) installed on the side of the road.

Since the multi-terminal B1 is equipped with a web camera and has an algorithm for encoding image data therein, the mobile terminal A1 is remotely separated by converting the image data of the user 200 into a specific code. Video call between the users 100 and 200 can be performed. Therefore, the user 100 can make a video call by attempting a call connection with the called number.

At this time, the image data and the audio data of the user 100 are transmitted and received to the remote multi-terminal B1 via the base station 10, the repeater 20, the connection repeater 30, and the switch 40.

Preferably, the image output window of the multi-terminal (B1) is divided into two, so that the image to be transmitted and the received image can be output respectively, so that the user 200 can check his image data in advance.

In addition, in any one of the mobile communication terminals A1 to An and the multi terminals B1 to Bn capable of video calls, the users 100 and 200 may first generate a video call attempt signal. When one user 200 generates a video call attempt signal at Bn, the multi-terminals B1 to Bn can check whether the mobile communication terminals A1 to An of the counterpart user 100 can make a video call. have. That is, it is determined whether or not the data transmitted from the mobile communication terminals A1 to An is image data, and if it is not the image data, outputting information on the screen of the multi-terminals B1 to Bn that it is impossible to make a video call. desirable.

With reference to the accompanying drawings, the function and operation of a multi-terminal system having a video call and incoming function and a method of providing the same according to an embodiment of the present invention having the above-described configuration will be described in detail.

10A and 10B are flowcharts illustrating signal flows of a multi-terminal system having video call and incoming functions according to an embodiment of the present invention.

FIG. 10A illustrates a process of performing a call connection and video call attempt from a mobile communication terminal A1 to An to a multi terminal B1 to Bn using a multi-terminal system having a video call and incoming function according to an embodiment of the present invention. Figure is a diagram.

First, when a user (for example, 100) desiring a call connection to the multi-terminals (B1 to Bn) is recognized by the destination number of the specific multi-terminals (B1 to Bn), the corresponding user (100) is called. Attempt to connect by entering the number. The call connection attempt signal is connected to the multi-terminals B1 to Bn through the base station 10, the repeater 20, and the switch 30.

When the call connection is established, the mobile communication terminals A1 to An and the multi-terminals B1 to Bn of the respective users 100 and 200 can make voice calls. If the user 100 generates a video call request signal for the multi-terminals B1 to Bn while the mobile communication terminals A1 to An are capable of video calls, the multi-terminals B1 to Bn receive the signal. By receiving the authorization to capture the image of the user 200 through the web camera to transmit a video call.

Fig. 10B is a diagram showing a process of making a call connection and video call attempt from the multi-terminals B1 to Bn to the mobile communication terminals A1 to An.

First, when a user 200 attempts to call a specific mobile communication terminal A1 to An using the multi-terminals B1 to Bn, the switch 40, the repeaters 30 and 20, and the base station ( 10) a call connection is made with the mobile communication terminals A1 to An to make a voice call.

If the user 200 desires a video call with the mobile communication terminals A1 to An connected by using the multi terminals B1 to Bn, the multi-terminals B1 to Bn respond to the video call attempt signal. Accordingly, it is determined whether image data is transmitted from the mobile communication terminals A1 to An.

If the image data can be transmitted, a video call start signal is generated to the mobile communication terminals A1 to An. If the image data cannot be transmitted from the mobile communication terminals A1 to An, the video call impossible information is transmitted to the multi-terminal ( Output to B1 to Bn).

If one of the mobile communication terminals A1 to An does not have a video call means and thus makes a video call impossible, the user holding the mobile communication terminals A1 to An is located at the shortest distance. It is possible to make a video call by informing the other user 200 of the called number of Bn).

On the other hand, the multi-terminal system having a video call and incoming call function according to an embodiment of the present invention and a method of providing the same are not limited to the above-described embodiments, but various modifications can be made without departing from the technical gist of the present invention.

As described above, according to the present invention, a multi-terminal system having a video call and incoming function and a method of providing the same according to the present invention provide a mobile communication terminal in which a user does not have a video call means because the multi terminal has a video call and incoming function. Even when possessed, it is possible to make a video call by notifying the called party of a specific multi-terminal to a counterpart user. Even when both users do not have a mobile communication terminal equipped with a video call means, only the called party number of the roadside is notified. It is very convenient to use because it can make a call, and there is an effect that can activate a wired call.

Claims (5)

In the multi-terminal system installed on the side of the road and performing data communication via voice call and web network, A unique called number is assigned to each terminal to make a voice call, and a web camera for capturing an image and a code conversion algorithm for remote transmission of the image data are respectively embedded therein, for outputting the transmitted image data. A multi-terminal having an image output window; A multi-terminal system having video calling and terminating functions, characterized in that the exchange number is configured to make a call connection by pre-registering a called number respectively assigned to the multi-terminal in a database. The multi-terminal system according to claim 1, wherein the image output window of the multi-terminal is divided into two parts such that image data to be transmitted and image data to be transmitted are divided and output to the same window. Recognizing a called number of a specific multi-terminal by one user desiring call connection to the multi-terminal; Attempting a call connection by a corresponding user inputting the called number into the mobile communication terminal; When the call connection is made, each user making a voice call through the mobile communication terminal and the multi terminal; Generating, by the user, a video call request signal for the multi-terminal while the mobile communication terminal is capable of video call; And receiving the signal from the multi-terminal and capturing and transmitting the image of the user through the web camera. In the multi-terminal system installed on the side of the road and performing data communication via voice call and web network, A unique called number is assigned to each terminal to make a voice call, and a web camera for capturing an image and a code conversion algorithm for remote transmission of the image data are respectively embedded therein, for outputting the transmitted image data. A multi-terminal having an image output window; An exchanger for making a call connection by registering a called number respectively assigned to the multi-terminal in a database; A mobile communication terminal for making a call connection using a called number of the multi terminal and making a video call; And a base station, a repeater, and a connection exchange for relaying transmission data from the mobile communication terminal to the multi terminal. Attempting a call connection by a user to a mobile communication terminal using a multi-terminal; When the call connection is completed, making a voice call with the mobile communication terminal; Generating a video call request signal by the user using the multi-terminal; Checking, by the multi-terminal, whether the corresponding mobile communication terminal is capable of a video call; A method for providing a video call and incoming call function of a multi-terminal system, comprising: making a video call or outputting impossible video call information to a screen of a multi-terminal.