KR20020068438A - Method for external call forwarding beween internet call and telephone network call in webphone system - Google Patents

Abstract

PURPOSE: An external call forwarding method between an Internet call and a telephone network call in a web phone system is provided to use international calls or long-distance calls at a low price by transferring a call received to the Internet to a telephone network or a call received to the telephone network to the Internet. CONSTITUTION: A web phone system is composed of an Ethernet controller(201), an ISDN interface serial input/output circuit(204), the first and second PSTN interface circuits(205,206), an audio codec(203), a PCM codec(202), a CPU(102), a switch(208), and a modem(207). The Ethernet controller(201) is connected with a LAN circuit(112) connected to the Internet. The ISDN interface serial input/output circuit(204) is connected with an ISDN circuit(111). The PSTN interface circuits(205,206) are connected with a central trunk circuit(110). The audio codec(203) codes or decodes input/output data into audio data or signals. The PCM codec(202) codes or decodes the signals transferred through the audio codec(203) and the Ethernet controller(201) into PCM data. The CPU(102) controls the PSTN interface circuits(205,206), the ISDN interface serial input/output circuit(204) and the Ethernet controller(201), based on the data of a ROM(104) and a RAM(103), so that a conference call can be achieved in a web phone. The switch(208) switches a microphone and a speaker with the first PSTN interface circuit(205). The modem(207) processes data with the second PSTN interface circuit(206).

Description

TECHNICAL FOR EXTERNAL CALL FORWARDING BEWEEN INTERNET CALL AND TELEPHONE NETWORK CALL IN WEBPHONE SYSTEM}

The present invention relates to a call forwarding method in a web phone system. In particular, a call forwarded to a telephone network or a telephone network to a call received by an internet line from a terminal that can be connected to an internet connection and a telephone network. The present invention relates to a method for external call forwarding between an internet call and a telephone network call in a web phone system which converts to an internet line and enables the video conference by converting the conversion into voice as well as video.

In general, as a multimedia communication service is popularized, not only a large amount of information can be obtained through the Internet, but also a web phone having a telephone call function using the Internet is widely used. Such a web phone is connected to a host that performs a specific web phone service of the Internet by using a computer having a speaker and a microphone and a communication device capable of accessing the Internet network. After receiving the information such as through a number of private information providers to enable the web phone to the desired recipient. In the web phone, a technology for converting a telephone call via the Internet or a telephone call from the Internet to be used as a general telephone of a public network is disclosed in Korean Patent Laid-Open Publication No. 2000-0018243, and a web phone module using a general telephone. When selecting a general CO line and an Internet network, the Korean Patent Publication No. 2000-0037646 discloses a technology of using a phone book in which a phone number is stored to use an internet call and a general phone call. have. Auto Call Forwarding is disclosed in US Pat. No. 6,125,126, where a call forwarding number is used for forwarding. However, in the above technologies, namely, an internet phone system or a web phone system, both callers and recipients can be connected to the Internet only to make calls, and they cannot receive and make calls with general telephone networks (PSTN, ISDN).

Therefore, an object of the present invention is that if one terminal (telephone) can be connected to both the Internet and the telephone network connection, the incoming call to the Internet to the telephone network or the incoming call from the telephone network to the Internet to the Internet to convert the call ( Or long distance calls) to provide a way to use a low phone bill.

Another object of the present invention is to provide a method for switching to video conference as well as voice.

The present invention for carrying out the above object is a first step of checking whether the telephone network to be connected to the free state by checking the external forwarding from the incoming and outgoing call or processing as a general call and the forwarding if the external forwarding;

A second step of sending an error message when the message is not in the first state and receiving a telephone number to be forwarded if it is in the free state and confirming connection to the call by dialing;

A third step of checking whether the video call is selected by connecting an error message if the connection fails in the second step and connecting a newly connected phone call path of the incoming call if the connection is successful;

A fourth step of switching to a video call mode in the third step to make an external call forwarding state and continuing until the other party hangs up the call;

A fifth step of checking whether the key input is an external call forwarding key during a call in the first step, if the corresponding key is an external forwarding, receiving a line type to be forwarded and checking whether the telephone network to be connected is free;

A sixth step of transmitting an error message when the service is not in the fifth state and receiving a telephone number to be forwarded when the free state is present and confirming connection to the call by dialing;

In step 6, if the connection fails, error message, and if the connection is successful, a seventh process of blocking transmission / reception between the connected call path and the terminal, and connecting the call call with the newly connected phone call path;

When the video call is connected by checking the selection of the video call by connecting the new phone call path, the video call mode is switched to the external call forwarding state, and the eighth process continues until the call is disconnected from the other party.

1 is a simplified diagram of a web phone system for explaining an embodiment of the present invention;

FIG. 2 is a circuit diagram illustrating the inside of the web phone system of FIG. 1 in detail.

3a, 3b is an external forwarding flow diagram of a call received from the outside according to an embodiment of the present invention

4 is an external call forwarding flow diagram during a call according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in describing the present invention through the reference numerals added to the components of each drawing, it should be noted that the same reference numerals are used even when the same reference numerals are shown on the other drawings to indicate the same components.

In addition, in the following description, many specific details such as components of specific circuits are shown, which are provided to help a more general understanding of the present invention, and the present invention may be practiced without these specific details. It will be obvious to those of ordinary skill in the field. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a simplified diagram of a web phone system for explaining an embodiment of the present invention,

CO lines and ISDN circuits 110 and 111 connected to public telephone networks, LAN circuits 112 connected to the Internet, tone / ring generators 106 and 107 for transmission and reception calls, and DTMF transmitters and receivers that provide DTMF signals ( 108, 109, ROM 103 for storing data according to web phone operation, RAM 104, a central processing unit 102 for controlling according to a conference call, public telephone network of the trunk line and ISDN circuits 110, 111, The switching unit 101 is configured to switch the LAN circuit 112 to enable a conference call with the Internet network. The switching unit 101 does not have a physical component in hardware but is virtual when connected to the central processing unit 102 and the trunk line and the ISDN circuits 110 and 111 and the LAN circuit 112 to enable a conference call. It shows the function.

FIG. 2 is a circuit diagram illustrating the inside of the web phone system of FIG. 1 in detail.

Ethernet controller 201 connected to LAN circuit 112 connected to the Internet (or LAN), ISDN interface serial I / O circuit 204 connected to ISDN circuit 111, and trunk line circuit 110. ITU-T Recommendation H.323 is used to process data transmitted / received by coding or decoding the PSTN interface circuits 205 and 206 and the input / output data of the ISDN interface serial input / output circuit 204 into audio data or signals. For the telephone network, an audio codec 203 for converting digital data transmitted to the Internet into analog data, and a signal through the audio codec 203 and the Ethernet controller 201 are coded or decoded into PCM data and output to a handset. The first and second PSTN interface circuits 205 and 206, the ISDN interface serial input / output circuit 204, and the Ethernet controller 201 by the PCM codec 202 and the data on the ROM 104 and the RAM 103. A central processing unit 102 for controlling conference calls within the web phone, switching 208 for switching the first PSTN interface circuit 205, a microphone and a speaker, and a second PSTN interface circuit 206 and data. It consists of a modem 207 for processing, a handset for answering, and an LCD for displaying the status for display and video conferencing, although the display is omitted.

Figure 3a, Figure 3b is an external forwarding flow diagram of a call received from the outside in accordance with an embodiment of the present invention,

A first step of checking whether the telephone network to be connected is in a free state by checking an external forwarding from an incoming call and processing it as a general call or an external forwarding if it is not in a call;

A second step of transmitting an error message when the service is not in the first state and receiving a telephone number to be forwarded if it is in the free state and confirming connection to the call by dialing;

A third step of checking whether the video call is selected by connecting an error message if the connection fails in the second step and connecting a newly connected phone call path of the incoming call if the connection is successful;

In the third process, if the video call is made, the video call mode is switched to the external call forwarding state, and the fourth process continues until the other party hangs up.

4A and 4B are external call forwarding flowcharts during a call according to an embodiment of the present invention.

A first step of checking whether the key input is an external call forwarding key during a call and receiving a line type to be forwarded if the corresponding key is external forwarding, and checking whether the telephone network to be connected is free;

A second step of sending an error message when the message is not in the first state and receiving a telephone number to be forwarded if it is in the free state and confirming connection to the call by dialing;

A third step of error messaging if the connection fails in the second process and blocking transmission / reception between the connected call path and the terminal if the connection is successful, and connecting the call call with the newly connected phone call path;

In the video call, if the video call is connected to the telephone call path, the video call mode is switched to the external call forwarding state and continues until the other party hangs up.

Therefore, an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4.

When a call arrives on the Internet line, it distinguishes whether the incoming call is an external call forward or just an incoming call. The distinction is made by distinguishing between the message types of ITU-T Recommendation Q.931. In other words, if the calling party creates a message indicating the external call forward status, the telephone number to be sent through the telephone network, and whether or not video conferencing is available, adds it to the user information area after sending it up, or creates a separate message instead of sending it up. The receiving end receives this message and processes it. If the external call forward is not listed, normal call processing is performed. If the external call forward is shown, the telephone number is checked. If the phone number is not listed, the external call forward message is received again, and if there is a phone number, the telephone network is checked whether it is free. If the telephone line is not free, after the general incoming processing, an external call forward "NAK" response message is sent to the Internet line. If the telephone line is free, the telephone line is selected and the received telephone number is transmitted. At this time, if the other party of the telephone line responds, the telephone line user is connected to the Internet user. At this time, the video message is checked if the video conference is possible and the video conference is attempted. If an internet line user or a telephone network line user hangs up during the call, both calls are dropped. In the case of forwarding a call to the telephone network to the Internet, when the call is received to the telephone network, the external forward state of the received message is checked. If the call is forwarded, the IP address is received. (Dot) of the IP address is input as '*' on the keyboard and the end of the input is recognized as '#'. When receiving the IP address, the Internet selects and transmits the received IP to receive the ACK / NAK status. When the NAK is received, the mobile station goes to the normal incoming state and when the ACK is received, the telephone network is connected to the Internet. If the message is not in the forward state, general incoming processing is performed. It checks that the other party hangs up in the call state and terminates both calls when the other party hangs up. The first incoming call does not require an external call forward, but shows the process of requesting an external call forward during a phone call. When the user talking on the Internet line requests an external call forward to the telephone network by selecting a key (or a button) during the call, the call is switched to the telephone network and the call of the telephone currently being called is terminated. That is, when the Internet line and the phone receive the external call forward request message in the call state, the call is terminated and the external call forward is processed. Likewise, calls from the telephone network are forwarded to the Internet line by the user's request. This feature allows the phone to switch to the telephone network after receiving the auto-answer message when the phone is in the auto-answer state. That is, in the external forwarding of the call received from the outside, in step 3a, the central processing unit 102 of the web phone shown in FIG. 2 receives the call. Here, the central processing unit 102 checks the status from the first and second PSTN interface circuits 205 and 206 for the interface of the general telephone and the ISDN interface serial input / output circuit 204 for the interface of the ISDN telephone or from the Ethernet controller 201. Check the status to receive the incoming call of the Internet phone and check the external call forward recognition of the incoming call in step (3b). If the external call forward in step (3b) receives the form of the line to be forwarded in step (3c), it checks whether the telephone network to be connected is free in step (3d) and sends an error message in step (3j) if not. If it is not free, in step 3e, a phone number to be forwarded is received, the received phone number is dialed through the keyboard 118, and in step 3g, a call connection success is confirmed. If the connection fails, an error message is sent in step 3k, but if the connection is successful, in step 3h, a newly connected telephone call path of the incoming call is connected. The connection relationship to the call is checked by the central processing unit 102 without having a separate physical switching device from the first and second PSTN interface circuits 205 and 206 and the ISDN interface serial input and output circuit 204 The Ethernet controller 201 is controlled, and the connection and the call to the desired call are made through the audio codec 203 and the PCM codec 202. If the video call is checked in step (3l) from the connection to the call, and the video call is switched to the mode for the video call in step (3m), and the call is disconnected from the state in the external forwarding state in step (3n). Proceed to When the external call forwarding is made during the call as described above, that is, when the call is not busy and the central processing unit 102 is checked in the process (4a) as shown in (3a) of FIG. If there is a key input from the keyboard 118, it checks whether it is an external call forward key in step 4c, or otherwise processes the corresponding key. If the external call forward key is received, a line type to be forwarded is received in step 4d, and in step 4e, an error message is sent in step 4j. If it is not free, the terminal receives the telephone number to be forwarded in step 4f, dials the received phone number in the keyboard 118, keyboard 118, 4g, and checks whether the call is successfully connected in step 4h. If the connection fails, an error message is sent in step (4k), but if the connection is successful, block transmission / reception between the call path and the terminal connected in step (4l), and the newly connected phone call of the phone being called in step (4m). Connect the furnace. The connection relationship to the call is checked by the central processing unit 102 without having a separate physical switching device from the first and second PSTN interface circuits 205 and 206 and the ISDN interface serial input / output circuit 204, or The Ethernet controller 201 is controlled, and the connection and the call to the desired call are made through the audio codec 203 and the PCM codec 202. If the video call is checked in step (4n) from the connection to the call, and the video call is switched to the mode for the video call in step (4o), and (4q) on the state side in the external forwarding state in step (4p). Continue until you hang up. External forwarding as described above may be simultaneously serviced to multiple users.

As described above, if one terminal (telephone) can connect both the Internet and the telephone network, international calls (or long distances) can be made by forwarding calls received through the Internet to the telephone network or by transferring calls received through the telephone network to the Internet through the Internet. Phone) can be used at low phone rates, there is an advantage that can be switched to video conferencing as well as voice.

Claims (6)

In the external forwarding method between the Internet call and the telephone network call of the web phone system, In the terminal connected to the Internet and the telephone network call of the web phone system and the PSTN, ISDN is connected to the Internet and the telephone network is connected to the telephone network or a call received from the Internet or a call The external call forwarding method between the Internet call and the telephone network call in the web phone system, characterized in that configured to convert the incoming call to the Internet. The method of claim 1, The external call forwarding method between the Internet call and the telephone network call in the web phone system, characterized in that the call is to switch not only the voice but also the video call. The external call forwarding method of claim 1, wherein the call is ringed to the terminal to enable a call when the switching is impossible. In the external forwarding method between the Internet call and the telephone network call of the web phone system, A first step of checking whether the telephone network to be connected is in a free state by checking an external forwarding from an incoming call and processing it as a general call or an external forwarding if it is not in a call; A second step of sending an error message when the message is not in the first state and receiving a telephone number to be forwarded if it is in the free state and confirming connection to the call by dialing; A third step of checking whether the video call is selected by connecting an error message if the connection fails in the second step and connecting a newly connected phone call path of the incoming call if the connection is successful; A fourth step of switching to a video call mode in the third step to make an external call forwarding state and continuing until the other party hangs up the call; A fifth step of checking whether the key input is an external call forwarding key during a call in the first step, if the corresponding key is an external forwarding, receiving a line type to be forwarded and checking whether the telephone network to be connected is free; A sixth step of transmitting an error message when the service is not in the fifth state and receiving a telephone number to be forwarded when the free state is present and confirming connection to the call by dialing; In step 6, if the connection fails, error message, and if the connection is successful, a seventh process of blocking transmission / reception between the connected call path and the terminal, and connecting the call call with the newly connected phone call path; A web phone comprising the eighth process of connecting to the new phone call and checking whether the video call is selected and switching to the video call mode when the video call is in an external call forwarding state and continuing until the call is disconnected from the other party. An external call forwarding method between an internet call and a telephone network call in a system. In the external forwarding method between the Internet call and the telephone network call of the web phone system, A first step of checking whether the telephone network to be connected is in a free state by checking an external forwarding from an incoming call, not a call between the Internet call and a telephone network call, or processing a general call and receiving a forwarding line type when external forwarding; A second step of transmitting an error message when the service is not in the first state and receiving a telephone number to be forwarded if it is in the free state and confirming connection to the call by dialing; A third step of checking whether the video call is selected by connecting an error message if the connection fails in the second step and connecting a newly connected phone call path of the incoming call if the connection is successful; In the third process, if the video call is made in the video call mode, the external call forwarding state is established and the fourth call process continues until the call is terminated by the other party. Call forwarding method. In the external forwarding method between the Internet call and the telephone network call of the web phone system, A first step of checking whether a key input is an external call forwarding key during a call between the Internet call and a telephone network call, and if the corresponding key is an external forwarding, receiving a line type to be forwarded and checking whether the telephone network to be connected is free; A second step of sending an error message when not in a free state and receiving a telephone number to be forwarded if it is in a free state and confirming connection to a call by dialing; In the second step, if the connection fails, error message, and if the connection is successful, a third step of blocking transmission / reception between the connected call path and the terminal and connecting the call being connected to the newly connected phone call path; A fourth step of connecting the new phone call to check whether the video call is selected and, if the video call is a video call, switch to the video call mode to make an external call forwarding state and continue the call until the other party hangs up. An external call forwarding method between an internet call and a telephone network call in a system.