KR100393633B1 - Method for external call forwarding between internet call and telephone network call in webphone system - Google Patents

Abstract

According to the present invention, in an external call forwarding between an internet call and a telephone network call in a web phone system, whether there is an incoming call from an internet call or a telephone network call of the web phone system or a call from an internet call or a telephone network call of the web phone system. The first process of checking and, if the incoming call is an external call forward from the Internet call or the telephone network call of the first process or if there is an external call forward key input from the call, the telephone network to be connected is received in the free state. A second process of receiving a phone number to be forwarded and dialing to check whether the call is connected; and in the second process, when the incoming call is dialed by an external call forward from the Internet call or the telephone network call, the call is connected by dialing. A third process of connecting a new call path with an incoming call, and the second lesson When the call line is connected by external forward dialing according to the external call forward key input from the call, the call line between the connected call line and the terminal is stopped and the call line between the call line and the newly connected phone is disconnected. The fourth process of connecting, and the fifth process of continuing in the connection state to the call path of the fourth process to the external call forwarding state until the end of the call from the other party can be connected to the Internet connection and the telephone network The call may be transferred from the terminal to the Internet line to the telephone network, or the call to the Internet may be transferred to the Internet line. In particular, in the above-mentioned conversion, not only audio but also video can be performed so that video conferencing can be performed.

Description

External call forwarding method between internet call and telephone network call in web phone system {METHOD FOR EXTERNAL CALL FORWARDING BETWEEN INTERNET CALL AND TELEPHONE NETWORK CALL IN WEBPHONE SYSTEM}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a call forwarding method in a web phone system. Particularly, a call forwarded to an internet line from a terminal capable of connecting the internet connection to a telephone network, or to a telephone network. The present invention relates to an external call forwarding method between an internet call and a telephone network call in a web phone system for converting a call to an internet line, and enabling the video conference by converting the call into an internet line.

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 performing 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 through a number of private information providers such as 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 into a general telephone in a public network is disclosed in Korean Patent Laid-Open Publication No. 2000-0018243, and a web phone using a general telephone When accessing the module, when using general phone line and internet network, use the Phone Book, which stores phone numbers, to mix and use Internet call and general phone call. See Korean Patent Laid-Open Publication No. 2000-0037646. It is starting. 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, the Internet phone system or the web phone system, both the caller and the receiver have to be connected to the Internet to make a call, and they cannot receive and make calls with general telephone networks (PSTN, ISDN).

Therefore, an object of the present invention is to make a call to the Internet or to the telephone network to the incoming call to the Internet if the Internet connection and the telephone network can be connected to one terminal (telephone) by converting the incoming call to the Internet to the Internet ( Or a long distance call) to provide a way to use the low cost.

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

The present invention for performing the above object is a first step of checking whether there is a call from an Internet call or a telephone network call of the web phone system or a call from an Internet call or a telephone network call of the web phone system; If the incoming call is from the Internet call or the telephone network call in step 1, or if there is an external call forward key input from the call, receive the line type to be forwarded. A second process of checking whether the call is connected to the call, and connecting a new call path with the incoming call when the call is connected by the external call forward from the Internet call or the telephone network call in the second step; In the third process and the external call forward key input from the call of the second process D) a fourth process of stopping transmission / reception between the call line being connected to the terminal when the call path is connected by external forward dialing and connecting the call path between the call being called and the newly connected phone; It is characterized by consisting of a fifth process that continues from the connection state of the call path to the external call forwarding state until the end of the call.

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 schematic diagram of a web phone system for explaining an embodiment of the present invention.

CO lines and ISDN circuits 110 and 111 connected to the public telephone network, 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, RAM 104 for storing data according to web phone operation, a central processing unit 102 for controlling conference calls, and public telephone networks of the trunk lines and ISDN circuits 110, 111. And a switching unit 101 for switching a conference call between the LAN circuit 112 and the Internet network. The switching unit 101 does not have a physical component in hardware but a central processing unit. The virtual function is shown when 102 is connected to the trunk line and the ISDN circuits 110 and 111 and the LAN circuit 112 to enable a conference call.

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

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

Checking whether the telephone network to be connected is in a free state by receiving a line type value to be forwarded if it is not in a call and receiving a forwarding call from an incoming call if it is not an external forwarding;

Transmitting an error message when the message is not in the free state and receiving a telephone number to be forwarded if the status is free, checking whether the call is connected to the call by dialing;

In the process, if the connection fails, error message, and if the connection is successful, connecting a newly connected telephone call path of the incoming call and checking whether the video call is selected;

In the above process, if the video phone is in the video call mode, the call forwarding mode is performed.

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

Checking whether the key input is an external call forwarding key during a call and receiving the corresponding line forwarding to check whether the telephone network to be connected is in a free state;

Transmitting an error message when the message is not in the free state and receiving a telephone number to be forwarded if the status is free, checking whether the call is connected to the call by dialing;

If the connection fails, error message, and if the connection is successful, blocking the transmission / reception between the connected call path and the terminal, and connecting the call call with the newly connected phone call path;

Checking the selection of the video call from the connection to the new phone call, the video phone is switched to the video call mode 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. That is, the calling party creates a message indicating the external call forwarding status, the telephone number to be sent through the telephone network, and whether or not the video conference is possible, and then sets up a message after adding the message to the user information area or creating a separate message instead of the setup message. Receive and process this message. If there is no external call forward, normal call processing is performed. If it is external call forward, it is checked whether a telephone number is included. If the phone number is not listed, the external call forward message is received again. If the phone number is provided, the telephone network is checked whether it is free. If the telephone line is not free, after performing normal call 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 after the line is selected. At this time, if the other party on the telephone line responds, the telephone line user is connected to the telephone line 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 and an IP address is received when the call is forwarded. (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, the external forwarding of the incoming call is received by the central processing unit 102 of the web phone shown in Fig. 2 in step 3a. 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 the Ethernet controller 201. It checks the status from the phone to receive the incoming call of the Internet, and checks whether the incoming call is forwarded from 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, the phone number to be forwarded is received in step 3e, the received phone number is dialed through the keyboard 118, and in step 3g, success of the call connection 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 / 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 (3l) from the connection to the call, the video call is switched to the mode for video call in step (3m), and the call is disconnected from the other party in the external call forwarding state in step (3n). Proceed. 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 not, the terminal receives the telephone number to be forwarded in step 4f, dials the received telephone number in step 4g on the keyboard 118, 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 newly connected telephone 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 and output circuit 204 The Ethernet controller 201 is controlled, and the call is established 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) from the state side in the external call forwarding state in step (4p). Continue until you hang up. The external call forwarding as described above may also serve multiple users simultaneously in some cases.

As described above, when both the Internet connection and the telephone network can be connected to a single terminal (telephone), the call forwarded to the Internet can be transferred to the telephone network, or the call forwarded to the Internet can be transferred to 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 (8)

delete delete delete 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 there is an incoming call from an internet call or a telephone network call of the web phone system or a call from an internet call or a telephone network call of the web phone system; Receives a line type to be forwarded if the incoming call is an external call forward from the Internet call or the telephone network call of the first step or if there is an external call forward key input from the call, and receives a telephone number to be forwarded if the telephone network to be connected is in the free state A second process of checking whether a call is made; A third step of connecting a new call path with the incoming call when the call is connected from the Internet call or the telephone network call by dialing by an external call forward in the second step; When the call line is connected by external forward dialing according to the external call forward key input from the call in the second process, the call line is disconnected from the connected call line and the terminal. The fourth process of connecting the currency of And a fifth step of continuing from the connection state of the fourth step to the external call forwarding state until the other party hangs up the call. The external call forwarding method between the Internet call and the telephone network call in the web phone system. delete delete 5. The Internet call and telephone network of claim 4, further comprising the step of switching to a video telephone mode when the new telephone line is connected in the third or fourth process. External call forwarding method between calls. The method of claim 4, further comprising: processing a general call if the external call is not forwarded in the second process, and transmitting an error message when the telephone network to which the connection is not free or a connection to the call fails. An external call forwarding method between an internet call and a telephone network call in a web phone system.