KR100359558B1 - An Automatic Exchange Internet phone and Method for Calling using Automatic Exchange Internet phone - Google Patents

Abstract

The present invention relates to an automatic switching Internet telephone and a call method using the same. When a call request is made, an Internet telephone service connection signal is connected to the Internet service provider to switch to an Internet protocol telephone mode using an Internet telephone service. It consists of an auto-switching Internet phone that automatically switches to regular phone mode when requested. Therefore, when making a call request, it is possible to switch to the Internet protocol phone mode and automatically switch to the normal phone mode when receiving a call request.

Description

{An Automatic Exchange Internet phone and Method for Calling using Automatic Exchange Internet phone}

The present invention relates to an automatic switching Internet telephone and a call method using the same, and more particularly, to switch to the Internet protocol telephone mode when making a call request, and to switch to the normal telephone mode when receiving a call request to maintain a high sensitivity call state. The present invention relates to an automatic switching Internet telephone capable of providing an Internet telephone service and a call method using the same.

In recent years, with the activation of Internet telephones, a new communication era has arrived. In 1995, the Internet phone, first introduced by Israeli company vocal tec, was only three years old. Nevertheless, Internet phones threaten the 120-year-old traditional telephone market itself. The basic principle between the general telephone system and the Internet telephone system is not much different, except that a personal computer is used instead of a telephone, an internet network, not a telephone network, and an internet gateway, not a telephone company.

In general, Internet telephony is classified into PC-to-PC, PC-to-Phone, Phone-to-PC, and Phone-to-Phone. The most basic form of PC-to-PC is that users use Internet phones. After running the software, if you press the Internet Protocol (IP) address of the other party, the sender and receiver are connected by the Internet gateway, which acts as a telephone company, and becomes available. . An IP address is similar to a telephone number and is an address registered with an Internet gateway. Here, when the sender speaks, the voice data is compressed and converted into an Internet standard signal, and the converted voice data is transferred to the Internet gateway through the Internet network, and then converted into voice by the other party's PC. In internet telephony, voice codec technology, which compresses and restores voice data as small as possible, is very important. The voice codec technology refers to a technique of binary encoding a voice, compressing the encoded voice data, and transmitting the compressed voice data to restore the voice data to the original voice data and then to decode the encoded voice. Currently, G.723 is used for Internet voice transmission rates of 5.3Kbps and 6.3Kbps, and G.729 for 8Kbps. In addition, in the Internet telephony method, a protocol for effectively transmitting voice data on the Internet is important, and the protocol used in the Internet telephony method is H.323, which is a standard protocol for voice and video communication on a LAN, which does not guarantee the quality of service. There are RTP / RTCP protocols that are provided in packets to improve the sound quality of recovered voice data, and RSVP protocols that reserve resources such as bandwidths along paths to satisfy quality of service (QoS).

The PC-to-Phone method, which is one step higher than the PC-to-PC method, is configured to communicate with each other by interconnecting the Internet network and the existing telephone network. It is the telephony that enables the PC-to-Phone method. It's a telephony gateway. Telephony gateway is a kind of server program that plays a role of relaying between existing telephone network, PSTN and internet. First, the gateway generates the DTMF signal to make a call to the other party; second, the voice is sent to the phone; and third, the phone state check function detects the busy signal and confirms that the other party hangs up. , Hang up the phone.

In addition, by connecting another telephony gateway to the PC-to-Phone method, the phone-to-phone method is enabled. In the phone-to-phone method, as shown in FIG. 1, when a call requester makes a call, voice data is connected to the gateway 13 of the region closest to the voice data through the PSTN network 12, and then the Internet network 14 Through the gateway 15 of the receiver region through the PSTN network 12 through the PSTN network 12 is connected to the other party. The gateways 13 and 15 and the Internet phone server 18 used in the phone-to-phone method require more functions than the PC-to-phone method. In addition to the basic functions of the gateway used in the PC-to-Phone method, it must have a function to answer a phone call, a prompt function, a DTMF signal detection function, a phone status check function, and a phone voice to the PC. . In addition, the Internet phone server 18 requires a call routing function based on a telephone number and a call log recording function for recording traces through the server.

However, such a conventional internet telephony service has various problems. First, since IP addresses used in the conventional Internet telephony service are limited, dynamic IP addresses are assigned to each home or small office home office (SOHO). When receiving a call request, there is a problem that cannot be received because the IP address is not determined. Second, there is a problem that the interoperability and compatibility between providers are insufficient, because each company has established its own system, the scope of providing the Internet telephony service is very limited. Third, because domestic Internet telephony services use the complex and vast H.323 (ITU-T) protocol, there is a problem that the international trend of using SIP (Session Initiation Protocol) (IETF) is not met.

Therefore, the present invention has been made to solve the conventional problems as described above, the object of the present invention is to switch to the Internet protocol phone mode when making a call request and to automatically switch to the normal phone mode when receiving a call request The present invention provides an automatic switching Internet telephone and a method of calling using the same, which can freely call when receiving a call request as well as when making a call request.

It is another object of the present invention to provide an automatic switching Internet phone and a call method using the same by downloading the advertisement data provided from the Internet service provider during idle time and outputting the corresponding advertisement data even when the Internet phone is hooked on or hooked off. There is.

1 is a configuration diagram of a conventional phone-to-phone type internet phone service,

2 is a block diagram of an Internet telephony service for explaining a preferred embodiment of the present invention;

3 is an external view showing an external configuration of an automatic switching Internet telephone according to the present invention;

4 is a block diagram showing an internal configuration of an automatic switching Internet telephone according to the present invention;

5 is a flowchart illustrating the operation of the Internet telephony service using the automatic switching Internet telephone according to the present invention.

♣ Explanation of symbols for the main parts of the drawing ♣

40: connection signal generator 41: ring detector

42: splitter 43: control unit

44: relay drive unit 45: memory unit

46: display unit 47: speaker

In order to achieve the above object, the present invention includes a keypad for outputting a DTMF signal, and an Internet telephone service using an Internet telephony service, which is assigned an Internet protocol address from an Internet service provider, and connects to an Internet telephony service when making a call request. It is connected to the Internet service provider by a signal to switch to the Internet protocol telephone mode using the Internet telephone service, and when the call request is made of an automatic switching Internet telephone to automatically switch to the normal telephone mode.

In addition, the present invention includes a keypad for outputting a DTMF signal and a display unit for outputting information to the outside, and stores an address of an Internet service provider and receives an Internet protocol address from an Internet service provider to use an Internet telephone service. A call method comprising: determining whether an internet phone is in a call request state or a call request state; If the call request is made, switching to the Internet protocol telephone mode and receiving an Internet protocol address from the Internet service provider and maintaining a transmission possible state; If the state is a call request, it characterized in that it comprises the step of switching to a general telephone system to maintain a reception state.

Hereinafter, a preferred embodiment of the automatic switching Internet phone according to the present invention and a call method using the same will be described in detail with reference to the accompanying drawings.

2 is a block diagram of an Internet telephony service for explaining a preferred embodiment of the present invention, and the Internet telephony service according to the present invention includes a calling party telephone A, a PC and communication equipment 20a, 20b, and a modem 21a, 22a. 21b, 22b), the Internet service provider 24 (hereinafter abbreviated as 'ISP'), the Internet 26, the PSTN 28, and the receiving telephone B. Here, the ISP 24 is further subdivided into an ISP network 24a and a gateway 24b.

The PC and the communication equipment 20a and 20b are connected to the phones A and B, respectively, and include a PC for executing a LAN card and an Internet phone (for example, a web phone (www.netspeak.com) program). -to-PC and PC-to-Phone In addition, a function of upgrading the functions of the telephones A and B (e.g., upgrading a program, adding a telephone function, etc.) is performed. In this case, the LAN card may be referred to as a network interface card (NIC) or a network interface unit (NIU), and serves as a basic device for configuring a network, connecting each station to a network. The structure of a LAN card is composed of a connector for cable connection for connecting to a medium of a LAN, a transmission unit for interfacing with a LAN, a bus interface unit for controlling a connection with a computer, and a control unit. The LAN card is a bus interface type (e.g. ISA, EISA, PCI, PCMCIA, etc.), a cable connection type (e.g., AUI, TP, BNC, etc.) and a network service method (e.g., Ethernet, Token Ring, etc.) There are many different types, so it is important to choose the one that best suits your purpose. Although one PC and communication equipment are shown in the figure, when a network is to be constructed, several computers can be connected by a hub. The configuration of the telephones A and B used in the present invention will be described later in detail with reference to FIGS. 3 and 4.

Each modem 21a, 22a, 21b, 22b is connected to each telephone A, B and each PC and communication equipment 20a, 20b, and converts analog signals into digital signals or vice versa. Convert to analog signal. The telephone A is connected to an unshielded twisted pair (UTP) cable between the PC and the communication equipment and the modem 21a or 22a. Since UTP cable consists of several strands, there are various connection methods depending on the number of strands and the purpose of use. Connection method in LAN uses EIA / TIA-568 standard. This standard requires the use of RJ-45 / RJ-11 connectors as defined by the Universal Service Order Codes (USOC). The USOC has been standardized by the FCC as a proposed connection standard for applications in telephone networks and related equipment. Since the USOC was created on the premise of a telephone network, EIA / TIA-568 is designed to be connected to the other pins except for the telephone. Therefore, it is basically a standard that is intended to be mixed with the telephone network. Currently, LAN (i.e. Ethernet) is basically 10Mbps LAN using 4 wires (1-2, 3-6) and 8 wires (1-2, 3-6, 4-5, 7-8 There is a 100Mbps LAN using In addition, gigabit LANs having a speed of 100 times or more are commercially used.

The ISP 24 receives various signals input through the modems 21a and 22a, assigns an IP address to the telephone A requesting Internet telephone service, compresses and packetizes the received voice signals, and transmits them to the Internet. On the contrary, it decompresses and decompresses the packet signal received from the Internet, and restores the original voice signal. In addition, since the format (PCM) of the data used in the telephone network and the protocol specified for signal transmission are different, the ISP 24 also performs a function of converting the input signal and data into a form that can be connected to the Internet. Furthermore, the advertisement data is supplied from the advertisement server 25 to provide to each of the phones A and B. The ISP 24 is composed of an ISP network 24a and a gateway 24b, and each component is described in detail as follows.

The ISP network 24a connects each of the telephones A and B to the Internet 26 and converts the protocols used in the telephone network into Internet protocols. These functions can be realized by routers, which consist of software that performs signaling protocols and hardware that processes the actual signals. Since the configuration and operation principle of the router is well known to those skilled in the art, further description thereof will be omitted. The gateway 24b supports real-time two-way voice communication between H.323 terminals on the LAN and other terminals on the WAN. The gateway 24b compresses and packetizes a received voice signal, decompresses and decompresses the received packet data. Restore the original voice signal. The one-second speech signal over the telephone network consists of 64,000 bits, but the gateway can compress from 2,400 to 8,000 bits, depending on the algorithm used. In other words, in the telephone network, only one person's voice can be delivered. However, an Internet phone can deliver more than eight voices. The compression algorithm can be implemented in software, but it is desirable to implement it in hardware to improve performance.

The advertisement server 25 is interconnected with the ISP 24, receives the advertisement data from the advertiser, stores it in a database, and provides the stored advertisement data to the ISP. Therefore, the transmitting telephone A and the receiving telephone B can download the advertising data from the ISP during the idle time when the telephone call is not performed, thereby displaying the corresponding advertising data in the hook on state or the hook off state. The Internet 26 is a computer network that connects computers around the world, and the PSTN 28 is a communication network that provides voice signal exchange service by connecting users' telephones through exchanges that serve country codes or area codes. It consists of subscribers using mobile communication phones, exchange facilities, and transmission facilities.

Here, the ISP network 24a and the Internet 26, the Internet 26 and the gateway 24b, and the gateway 24b and the PSTN 28 are all connected by a UTP cable, and the cable modems 21a, 21b) and the ISP network are connected by coaxial cable, and between the source telephone A and the PSTN 28, the PSTN 28 and the receiver telephone period, and between the ADSL modems 22a and 22b and the ISP network. It is connected by telephone line.

3 is an external view showing the external configuration of the automatic switching Internet telephone according to the present invention, the automatic switching Internet telephone of the present invention is a handset 30 consisting of a microphone for transmitting a voice signal and a speaker for receiving the voice signal A keypad 32 for generating a DTMF signal, a display unit 34 for outputting information to the outside, a connection signal generator 36 for generating a connection signal for using an Internet telephone service, and FIG. 2. Internet connection terminal 38b for connecting to the PC and communication equipment (20a, 20b) of the internal connection terminal 38a and cable modem (21a, 21b) or ADSL modem (22a, 22b) to use the Internet And a connection terminal unit 38 including a PSTN connection terminal for connecting with the PSTN 28.

Figure 4 is a block diagram showing the internal configuration of the automatic switching Internet telephone according to the present invention, the automatic switching Internet telephone of the present invention is a connection signal generator 40, ring detector 41, splitter 42, control unit 43 ), A relay driver 44, a connection terminal 38, a memory 45, a display 46, and a speaker 47.

The connection signal generator 40 generates a connection signal for using an Internet telephone service. When the connection button located on one side of the front panel of the automatic switching Internet telephone of the present invention is pressed, a DTMF signal corresponding to the internet telephone service connection signal is used. Is configured to occur. The ring detector 41 is connected to the PSTN 28, and detects a ring signal (75 Vrms, 20 Hz, 2 seconds per second) on a telephone line to generate a ring detection signal and a hook on / off detection signal. To perform. The splitter 42 is connected to the cable modem 21 or the ADSL modem 22 and performs a function of receiving a signal input through a UTP cable, filtering the signal, and separating the signal into voice data and image data. Here, all UTP cable connections use the RJ-45 standard.

The control unit 43 is connected to the connection signal generation unit 40, the ring detection unit 41 and the splitter 42, the Internet telephone service connection signal generated by the connection signal generation unit 40 and the ring detection unit 41 Receives the detected ring detection signal to determine whether the phone is in a call request state or a call request state, outputs a relay control signal according to the determined state, and requests an Internet telephone service from the ISP 24. Control to output the transmittable signal by receiving the IP address. For example, the relay control signal is output in three types (high signal (5V), intermediate signal (2.5V), low signal (0V)), and when it is a high signal, it switches to the Internet telephone mode by this automatic switching Internet phone. In case of an intermediate signal, it is switched to Internet telephony mode by a PC, and when it is a low signal, it is switched to a normal telephone mode. In addition, the distinction between the call request state and the call request state is a state in which a call request is made if there is a connection signal transmitted from the connection signal generation unit 40, and a ring signal detection signal transmitted from the ring detection unit 41. If there is a call request. Further, the control unit 43 is connected to the PC and the communication equipment 20 also performs a function of upgrading the function of the automatic switching Internet phone.

The relay driver 44 is connected to the controller 43. The relay driver 44 drives the relay according to the relay control signal output from the controller 43, and the controller 43 and the respective connection terminals 38a, 38b, and 38c according to the corresponding signal. ) Function. That is, when a high signal is applied, it is connected to the Internet connection terminal 38b to use the Internet telephone service by the automatic switching Internet phone. When an intermediate signal is applied, it is connected to the internal connection terminal 38a and Internet telephone service is available, and when a low signal is applied, it is connected to the PSTN connection terminal 38c to use a general telephone service.

The memory unit 45 is interconnected with the control unit 43, stores the IP address of the ISP which can use the Internet phone service, and performs various programs and web browser functions for performing the operation of the control unit 43. Function to save the program. The memory unit 45 may include a flash memory, which is a SDRAM capable of accessing a storage location at high speed without waiting time by operating the storage location in synchronism with the control unit 43 or a flash memory that is a retrieval memory that can electrically rewrite previous contents. It is preferable to use.

The display unit 46 is connected to the control unit 43 and performs a function of outputting image data among advertisement data output from the control unit 43. The display unit 46 is preferably LCD. The speaker 47 is connected to the control unit 43 and performs a function of outputting voice data among the advertisement data output from the control unit 43 to the outside.

An operation state of the automatic switching Internet telephone and the call method using the same according to the present invention as described above will be described with reference to the accompanying drawings.

5 is a flowchart illustrating the operation of the Internet phone service using the automatic switching Internet phone according to the present invention, it is assumed that the person who wants to use the Internet phone service has a subscriber identification number and password.

First, store the address of the ISP that can use the Internet telephony service in the memory of the automatic switching Internet phone, and set this ISP address (for example, '00365' when using international call 008) at the initial setting. (502). Thereafter, the controller determines whether the automatic switching Internet telephone is in a state of making a call request according to whether the Internet telephone service connection signal is detected (504). Here, the Internet telephone service connection signal is generated by the caller pressing the 'connect' button located on the front panel of the telephone.

As a result of the determination of the above step, if the phone has made a call request, the controller outputs a relay control signal to switch to the Internet phone mode (506). At this time, the Internet phone mode is divided into the Internet phone mode through the phone and the Internet phone mode through the PC, the Internet phone mode through the phone is made by the operation of the 'connect' button of the phone, the Internet phone mode through the PC This is done by the operation of the PC's Internet phone running software. Therefore, the controller outputs a relay control signal of a high signal (for example, 5V) in the Internet telephone mode through the telephone, and a relay control signal of an intermediate signal (for example, 2.5V) in the Internet telephone mode through the PC. Print and distinguish However, the Internet telephony mode through the telephone and the internet telephony mode via the PC are changed only after the connection terminal connected to the modem is the same.

Upon switching to the Internet telephony mode, the control unit receives an IP address from the ISP (508) and instructs the call requester to enter the subscriber identification number and password. If the ISP's IP address is set, it will be assigned to the ISP simply by pressing the Connect button. If the subscriber identification number and password inputted by the call requester match, the controller outputs a signal to be transmitted to the call requester through the speaker (510). That is, the transmittable beep is output only when the subscriber identification number and the password match, and internet telephone service cannot be used when the subscriber identification number and the password do not match. The use of Internet telephony services by entering subscriber identification numbers and passwords is because the gateway does not yet have a caller identification function. The call requester can input a desired telephone number when a transmittable beep is output.

As a result of the determination in step 504, if it is determined that the call requester's phone is not in a state of making a call request, the controller receives a ring detection signal output from the ring detector to determine whether the phone is in a call request state (512). . As a result of the determination, if the phone is in the call request state, the controller outputs a relay control signal to switch to the normal phone mode (514). At this time, the control unit applies a low signal (0V) to the relay driver to drive the relay to connect the control unit and the PSTN connection terminal is switched to the normal telephone mode.

Since a successful call is made after the step 510 and the step 514, the call requester or the call request receiver makes a call with the other party (516). During the call, the controller determines whether there is advertisement data transmitted from the ISP (518). If there is no advertisement data, the controller downloads the advertisement data from the ISP (520) and proceeds to step 518. Among the data divided into the voice data and the image data, the voice data is output through the speaker and the image data is displayed through the display unit (522).

Next, the controller receives the hook on or hook off signal output from the ring detector to determine whether the call requester or the call request receiver has terminated the call (524), and proceeds to step 516 if the call has not ended yet. After repeating the subsequent steps, if it is determined that the call is not terminated or received a call request in step 512, it is determined whether there is advertisement data transmitted from the ISP again (526). As a result of the determination, if there is no advertisement data, the advertisement data is downloaded from the ISP (528) and the process proceeds to step 526. If the advertisement data exists, the control unit separates the speech data from the data divided into the speech data and the image data by the splitter. After outputting through a speaker and displaying image data through the display unit 530, all processing ends.

The above description is only for explaining one embodiment, and the present invention is not limited to the above-described embodiment and can be variously changed within the scope of the appended claims. For example, the shape and structure of each component specifically shown in the embodiment of the present invention can be modified.

As described above, according to the automatic switching Internet phone according to the present invention and a call method using the same, when making a call request, the user can switch to the Internet protocol phone mode and automatically switch to the normal phone mode when receiving a call request. When you receive a call request, of course, you can freely talk.

In addition, by downloading the advertisement data provided from the Internet service provider during the idle time and outputs the corresponding advertisement data even when the Internet phone is hooked on or hooked off, there is an effect that can maximize the advertising effect.

Claims (7)

An internet telephone including a keypad for outputting a DTMF signal and using an internet telephone service by receiving an internet protocol address from an internet service provider, When making a call request, the service is connected to the Internet service provider by an internet phone service connection signal, thereby switching to the Internet protocol phone mode using the internet phone service. An auto-switching Internet phone that automatically switches to your regular phone mode when you receive a call request. The Internet telephone of claim 1, wherein Handset; A connection signal generator for generating a connection signal for using an Internet telephone service; A ring detector connected to a public switched telephone network and detecting a ring signal and a hook on / off signal on a telephone line; A splitter connected to the modem and filtering the signal input through the modem to separate voice data and image data; Receiving an internet phone service connection signal generated by the connection signal generator and a ring signal detected by the ring detector, it is determined whether the telephone is in a call request state or a call request state, and according to the determined state. A control unit for outputting a relay control signal and controlling to output a transmittable signal by receiving an IP address from the Internet service provider when an Internet telephone service request is made; A relay driver connected to the control unit and driving the relay according to the relay control signal output from the control unit to connect the respective connection terminals and the control unit according to the corresponding relay control signal; A memory unit which is connected to the control unit and stores an Internet protocol address of an Internet service provider that can use an Internet telephony service, and stores a program for performing an operation of the control unit and a program for performing a web browser function. ; A display unit connected to the control unit and outputting image data output from the control unit; And a speaker connected to the controller, the speaker outputting voice data from the controller. The method of claim 2, wherein the connection terminal A PSTN connector for connecting to a public switched telephone network; An internet connection terminal for connecting to an internet network; And An automatic switching Internet telephone, comprising an internal connection terminal for connection with a personal computer and communication equipment. 3. The automatic switching Internet telephone of claim 2, wherein the address of the Internet service provider stored in the memory is set at initial setting of the telephone. A telephone method comprising a keypad for outputting a DTMF signal and a display for outputting information to an external device, and storing an address of an internet service provider and receiving an internet protocol address from the internet service provider and using an internet telephone service. To Determining whether the internet phone is in a call request state or a call request state; If the call request is made, switching to the Internet protocol telephone mode and receiving an Internet protocol address from the Internet service provider and maintaining a transmittable state; If a call request is received, the method for calling using the automatic switching Internet telephone comprising the step of switching to a normal telephone method to maintain a reception state. The method of claim 5, And downloading the advertisement data transmitted from the internet service provider in idle time and displaying the advertisement data. The method of claim 5, wherein the determining step And a call request is determined when an internet telephone connection signal requesting the Internet telephone service is detected, and a call request is received when a ring signal is detected.