KR101539117B1 - Method of automatic call changing of telecommunication equipment and telecommunication equipment performing the same - Google Patents

Method of automatic call changing of telecommunication equipment and telecommunication equipment performing the same Download PDF

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Publication number
KR101539117B1
KR101539117B1 KR1020080062815A KR20080062815A KR101539117B1 KR 101539117 B1 KR101539117 B1 KR 101539117B1 KR 1020080062815 A KR1020080062815 A KR 1020080062815A KR 20080062815 A KR20080062815 A KR 20080062815A KR 101539117 B1 KR101539117 B1 KR 101539117B1
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South Korea
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communication terminal
terminal
call
counterpart
network
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KR1020080062815A
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Korean (ko)
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KR20100002787A (en
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김용관
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주식회사 케이티
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Priority to KR1020080062815A priority Critical patent/KR101539117B1/en
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Abstract

There is provided a communication terminal performing an automatic call switching method and an automatic call switching function of a communication terminal capable of making a call using the Internet network. The communication terminal may further include a step of extracting a telephone number of the counterpart terminal using the call signal transmitted from the counterpart terminal in the communication terminal, and a step of transmitting a call signal to the counterpart terminal using the Internet network in the communication terminal . Accordingly, it is possible to switch a general call to use the Internet using a communication terminal used in a wired communication network or a wireless communication network. Further, by using the Internet network, it is possible to communicate with the other party's terminal at a lower communication cost.

Internet network, Voice over Internet Protocol (VoIP), Server, Autoresponder

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an automatic call switching method for a communication terminal,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a method for automatically switching a call of a communication terminal, and more particularly, to a method of switching a call of a communication terminal to connect a call using the Internet.

In general, the telephone network is composed of a fixed telephone network and a wireless telephone network. In addition, there is a data communication network. Each network is interworked to enable voice communication and data communication.

When a call is attempted using a wire telephone terminal of the wire telephone network, the exchange station of the wire telephone network controls the connection with the terminal of the other party. Accordingly, when the counterpart terminal is located within the wireline telephone network, the counterpart terminal provides the connection with the counterpart terminal inside the wireline telephone network through interlocking with the exchange office itself or another exchange.

On the other hand, in order to establish a call connection with a wireless telephone network outside the wire telephone network, it is necessary to interwork the wire telephone network and the wireless telephone network. That is, when an attempt is made to make a call to a mobile communication terminal using a wire telephone terminal, a switching center of a wire telephone network connects with a wireless switching center of a wireless telephone network, and a wireless switching center finds a partner mobile communication terminal and provides connection. Accordingly, the wired telephone of the wired telephone network can communicate with the mobile communication terminal of the wireless telephone network.

Also, in case of international telephone, it is possible to make a call by interworking with a domestic fixed telephone network or a wireless telephone network and an overseas fixed telephone network or a wireless telephone network. When an attempt is made to make an international call to a domestic mobile communication terminal, the counterpart country code is identified according to the counterpart telephone number, and the counterpart of the radio telephone establishes a connection with the counterpart of the foreign country. The foreign exchange can provide a connection to the other's wired terminal or mobile communication terminal. As a result, international calls can be made.

Recently, attempts have been made to provide voice calls using the Internet. This is a result of a widespread use of the Internet-based telephone call technology and a significant improvement in the voice call quality even when using the Internet.

In order to make a voice call using the Internet, an IP address must be allocated to the Internet service provider (ISP) using a computer. After that, you can connect to the other party by running internet phone program on your computer.

Another way to use the Internet is to use an Internet phone. An Internet telephone having an IP address allocated from an Internet service provider is used, and the Internet telephone encapsulates voice information and treats it as data in the Internet network and transmits the encapsulated voice information. When connecting to a wired or wireless telephone network, a gateway is provided to convert the voice information. Accordingly, it is possible to provide a voice call with a wired telephone or a mobile communication terminal. This is characterized in that it is convenient to use because it is similar in shape and use method to a conventional telephone.

Both of these methods require a gateway for converting a protocol for coupling with a wired communication network or a wireless communication network, and in particular, provide a mapping table of addresses (IP address and telephone number) for interworking between networks A gatekeeper is required.

However, even when interworking between networks is performed as described above, there is a problem that a function of a general wired telephone or a mobile communication terminal using a single terminal and a function of making a call via the Internet network are not provided do. Further, there is a problem that the call can not be switched so that the ordinary call can use the Internet network.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of automatically switching a communication terminal to use an Internet network using a communication terminal.

Another object of the present invention is to provide a communication terminal having an automatic call switching function as described above.

According to another aspect of the present invention, there is provided a method for automatically switching a communication terminal of a communication terminal, the method comprising the steps of: receiving a call signal from a counterpart terminal in a communication terminal, And transmitting the call signal to the counterpart terminal using the telephone number of the counterpart terminal extracted through the Internet network at the communication terminal.

Here, the communication terminal may be a mobile communication terminal.

Here, in the case where the communication terminal transmits a call signal to the counterpart terminal using the Internet network, when the communication terminal is a communication terminal supporting the voiceover Internet protocol, the voice terminal uses the voiceover Internet protocol of the communication terminal It may be to issue a call signal.

Here, in the case where the communication terminal transmits a call signal to the counterpart terminal using the Internet network, when the communication terminal is a communication terminal that does not support the voiceover Internet protocol, Or the like.

Here, the IP address of the voice-over Internet Protocol server can be designated by the user of the communication terminal.

Here, the use of the automatic call switching method of the communication terminal may be designated by the user of the communication terminal.

The method may further include checking the extracted phone number of the counterpart terminal and determining whether the call is roaming overseas.

Here, the step of confirming the extracted telephone number of the counterpart terminal and selecting whether to proceed to the next step may be further included.

Here, the method may further include transmitting an automatic response to the counterpart terminal.

Here, the automatic response may be a short message.

Here, the automatic response may be a voice message.

According to another aspect of the present invention, there is provided a communication terminal having an automatic call switching function, the communication terminal comprising: a communication terminal for receiving a call signal transmitted from a counterpart terminal, And a transmitter for transmitting a call signal to the counterpart terminal using the telephone number of the counterpart terminal extracted through the Internet at the communication terminal.

Here, the communication terminal may be a mobile communication terminal.

Here, when the communication terminal is a communication terminal supporting the voice-over Internet protocol, the calling unit may transmit a call signal to the counterpart terminal using the voice-over Internet protocol of the communication terminal.

Here, if the communication terminal is a communication terminal that does not support the voice-over Internet protocol, the calling unit may transmit a call signal to the counterpart terminal via the voice-over internet protocol server.

Here, the IP address of the voice-over internet protocol server may be designated by the user of the communication terminal.

Here, the use of the automatic call switching function of the communication terminal may be designated by the user of the communication terminal.

Here, the originating unit may transmit an automatic response to the counterpart terminal.

According to the automatic call switching method of the communication terminal as described above, it is possible to use the communication terminal used in the wired communication network or the wireless communication network to switch the general communication to use the Internet.

Further, by using the Internet network, it is possible to communicate with the other party's terminal at a lower communication cost. In addition, overseas roaming has the advantage of further reducing the communication cost.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail.

It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are to be interpreted in an ideal or overly formal sense unless explicitly defined in the present application Do not.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In order to facilitate the understanding of the present invention, the same reference numerals are used for the same constituent elements in the drawings and redundant explanations for the same constituent elements are omitted.

1 is an exemplary diagram illustrating a wired / wireless communication network configuration.

Referring to FIG. 1, the wired and wireless network 110 and the WLAN 120 may be directly connected to each other, and the wired and wireless networks 110 and 120 may be interworked with the Internet network 130 Through the gateway 141 and the gatekeeper 142.

For example, in order to establish a call connection from the general telephone set 113 to the mobile communication terminal 124, a call signal is transmitted using the telephone number of the mobile communication terminal. It is connected to the wired switching network 111 via the wired switching center 112 and through the telephone number of the other terminal in the wired switching network, it is recognized that the connection is to the wireless switching network which is the external network of the wired switching network. Accordingly, the mobile communication terminal 121 is connected to the wireless switching network 121 and then to the mobile communication terminal 124 through the wireless switching station 122 and the base station 123.

The connection from the ordinary telephone set 113 to the Internet telephone set 134 is connected to the wired switching network 111 as described above and then the connection to the Internet area is recognized in the wired switching network 111, And a mapping between a telephone number and an IP address is performed using the gatekeeper 142. [ And then connected to the Internet telephone 134 through an Internet service provider (ISP) 132 and a router 133.

The connection from the mobile communication terminal 124 to the Internet telephone 134 is connected to the wireless switching network 121 through the base station 123 and the wireless switching center 122 and then transmitted to the opposite telephone It is determined that the connection is made to the Internet area through the number, and conversion is performed for interworking between the telephone network and the Internet network through the gateway 141, and mapping between the telephone number and the IP address is performed using the gatekeeper 142 . And then connected to the Internet telephone 134 through an Internet service provider (ISP) 132 and a router 133.

2 is a diagram illustrating an operation of a communication terminal through a VoIP server according to an embodiment of the present invention.

Referring to FIG. 2, when a call is to be connected by the public telephone 213 or the mobile communication terminal 224, the user first connects to a Voice Over Internet Protocol (VoIP) server 214 or 225 And the outgoing call signal is transmitted to the gateway 241 so that the VoIP server can use the Internet network. This makes it possible to make a call using the Internet network.

For example, in order to make a call connection from the general telephone set 113 to the mobile communication terminal 124, a call signal is transmitted using the telephone number of the mobile communication terminal 124. And transmits a signal including the IP address of the VoIP server for using the VoIP server 214 and the like. The signal is connected to the wired switching network 211 via the wired switching center 212 and directly to the VoIP server 214 in the wired switching network. In the VoIP server, the packet is transmitted to the gateway 241 so as to use the Internet network. Therefore, signals are transmitted using the Internet network. The mobile communication terminal is connected to the wireless switching network 221 through the gateway 241 and then the wireless switching center 222 and the base station apparatus 221 are connected via the Internet 231 to the wireless switching network 221, And is connected to the mobile communication terminal 224 through the communication network 223.

In order to make a call connection from the mobile communication terminal 224 to the general telephone set 213, a call signal is transmitted using the telephone number of the general telephone set. In addition, a signal including the IP address of the VoIP server is transmitted. The signal is connected to the wireless switching network 221 via the base station 223 and the wireless switching center 222 and directly connected to the VoIP server 225 in the wireless switching network 221. The VoIP server 225 transfers the Internet network 231 to the gateway 241 so that the Internet 231 can be used. Therefore, the signal is transmitted using the Internet network 231. The caller is connected to the wired exchange network 211 via the gateway 241 again after arriving near the wired exchange network 211 where the other party's general telephone 213 is located via the Internet network, (213).

FIG. 3 is an exemplary diagram illustrating an operation using a communication terminal supporting Voice over Internet Protocol (VoIP) according to another embodiment of the automatic call switching method of the communication terminal according to the present invention.

Referring to FIG. 3, when a telephone is connected to a general telephone or a mobile communication terminal, the corresponding signal is transmitted in the form of data by encapsulating voice information by VoIP. Therefore, it is directly transmitted to the data network (Internet network) in the wireline or wireless exchange network.

For example, in order to make a call connection from the general telephone 313 to the mobile communication terminal 324, a call signal is transmitted using the telephone number of the mobile communication terminal. At this time, the voice information is encapsulated by VoIP. And is therefore treated as data. Then, the voice information is connected to the wired switching network 311 through the wired switching center 312 and directly to the Internet network 331 in the wired switching network. In this case, since the data is handled as data, the conversion process in the gateway is omitted. Therefore, voice information is transmitted using the Internet network. The mobile communication terminal 324 is connected to the wireless switching network 321 or directly connected to the wireless switching network 321 through a gateway (not shown) And then connected to the mobile communication terminal 324 through the wireless switching center 322 and the base station device 323. [

Also, in order to establish a call connection from the mobile communication terminal 324 to the general telephone set 313, a call signal is transmitted using the telephone number of the counterpart general telephone set 313. As described above, the voice information is encapsulated by VoIP and is treated as data. And is directly connected to the Internet network 331 through the base station apparatus 323, the wireless switching center 322, and the wireless switching network 321. The conversion process at the gateway is also omitted. When the mobile telephone 311 arrives near the wired exchange network 311 where the other party's general telephone 313 is located via the Internet network, the data is directly connected to the wired exchange network 311 via a gateway or not connected to the wired exchange network 311 via a gateway And is connected to the ordinary telephone set 313 through the wired switching center 312.

4 is a flowchart illustrating an automatic call switching method of a communication terminal according to an exemplary embodiment of the present invention.

Referring to FIG. 4, an automatic call switching method of a communication terminal according to an exemplary embodiment of the present invention includes a step of extracting a phone number of an opposite terminal using a call signal transmitted from a counterpart terminal in a communication terminal, And transmitting the call signal to the counterpart terminal using the Internet network in the communication terminal.

First, the phone number of the counterpart terminal can be confirmed by extracting the counterpart phone number using the call signal transmitted from the counterpart terminal (S410). The identified phone number of the other party's terminal may be used at the time of originating at a later stage.

Next, in the case where the communication terminal transmits a call signal to the counterpart terminal using the Internet network (S450), when the communication terminal is a communication terminal supporting the voiceover Internet protocol, the voiceover Internet protocol of the terminal is used (Step S451). If the communication terminal is a communication terminal that does not support the voice-over Internet protocol, it may be a step S452 of sending a call signal via the voice-over internet protocol server have.

In step S451, a call signal using the voice over internet protocol of the terminal is encapsulated as voice data through VoIP and transmitted to the Internet through the voice information of the communication terminal.

For example, in order to establish a call connection from a communication terminal to a correspondent terminal, a call signal is transmitted using a phone number of the counterpart terminal. At this time, the voice information is encapsulated by VoIP and is handled as data. Then, the signal is connected to the switching network through the switching center, and then to the Internet network in the switching network. In this case, since the data is treated as data, the conversion process at the gateway is omitted. Therefore, signals are transmitted using the Internet network.

In a case where a communication terminal makes a connection to a VoIP server in order to connect a call, the VoIP server sends a call signal via the voice over internet protocol server (S452) To be transmitted to the gateway. This makes it possible to make a call using the Internet network. Also, the IP address of the VoIP server may be designated by the user.

For example, in order to establish a call connection from a communication terminal to a counterpart terminal, a call signal is transmitted using the telephone number of the counterpart terminal. In addition, a signal including the IP address of the VoIP server for using the VoIP server is transmitted. The signal is connected to the switching network through the switching center and directly to the VoIP server in the switching network. In the VoIP server, it is transmitted to the gateway to use the Internet network. Therefore, signals are transmitted using the Internet network.

In addition, the use of the automatic call switching method of the communication terminal according to the present invention can be designated by the user of the communication terminal. Therefore, if the user does not want to use the automatic call switching method of the communication terminal according to the present invention, the automatic terminal switching method according to the present invention may not be used.

5 is a flowchart illustrating a method for determining whether to roam abroad according to another embodiment of the present invention.

Referring to FIG. 5, the automatic call method according to another embodiment of the present invention may further include a step S520 of determining whether the mobile terminal is roaming abroad by checking the telephone number of the extracted mobile terminal. Steps S550, S551, and S552 subsequent to step S520 of determining whether the roaming is overseas roaming are the same as the corresponding processes S450, S451, and S452 of FIG. 4, and therefore detailed description thereof will be omitted.

6 is a flowchart illustrating a step of determining whether to perform a next step of an automatic call switching method of a communication terminal according to another embodiment of the present invention.

Referring to FIG. 6, the automatic call switching method according to another embodiment of the present invention further includes a step (S630) of checking the telephone number of the extracted counterpart and selecting whether to proceed to the next step . Steps S650, S651, and S652 after the step S630 for selecting whether or not to proceed to the next step are the same as the corresponding steps S450, S451, and S452 in FIG. 4, and thus detailed description will be omitted.

For example, after confirming the telephone number of the counterpart terminal, it is possible to determine whether to make a call using the automatic call switching function. This is because the caller can be identified by using the telephone number of the counterpart terminal, so that the call signal is not transmitted without the necessity of calling. In particular, as shown in FIG. 6, in the case of a call by overseas roaming, it is more efficient to use the Internet network to reduce communication costs.

7 is a flowchart illustrating a step of transmitting an automatic response to a counterpart terminal of an automatic call switching method of a communication terminal according to another embodiment of the present invention.

Referring to FIG. 7, a method for automatically switching a communication terminal according to another embodiment of the present invention may further include transmitting an automatic response to a counterpart terminal (S740). This is transmitted in the sense of a notice that the call signal will be transmitted to the other party through the counterpart terminal soon after the automatic call conversion. In addition, the automatic response may be delivered in a short message (SMS) or an automatic response voice message (ARS). Since steps S750, S751, and S752 after the step S740 of transmitting the automatic response to the counterpart terminal are the same as the corresponding steps S450, S451, and S452 of FIG. 4, detailed description will be omitted.

For example, it takes several seconds to several tens of seconds to transmit a call signal according to the automatic call switching method after confirming the phone number of the counterpart terminal. Therefore, in order to prevent the other party from calling again during this time, Message. Therefore, the other party can not transmit the call signal again, and also functions to announce the call signal.

FIG. 8 is a flowchart illustrating a method for automatically switching a communication terminal according to another embodiment of the present invention.

Referring to FIG. 8, the automatic call switching method of another communication terminal as a whole, including all the steps that can be additionally configured in FIG. 5 to FIG. 7, will be described. Therefore, the steps S810, S850, S851 and S852 are the same as the corresponding steps S410, S450, S451 and S452 of FIG. 4, the step S820 is the same as the corresponding step S520 of FIG. 5, The process S830 is the same as the corresponding process S630 of FIG. 6, and the process S840 is the same as the corresponding process S740 of FIG. 7, and thus a detailed description thereof will be omitted.

9 is a block diagram illustrating a communication terminal having an automatic call switching function according to an embodiment of the present invention.

9, a communication terminal 900 having an automatic call switching function according to an exemplary embodiment of the present invention includes a receiving unit 910 for extracting a phone number of a calling party using a call signal transmitted from a counterpart terminal, And a transmitting unit 920 for transmitting a call signal to the counterpart terminal using the telephone number of the counterpart terminal extracted from the communication terminal through the Internet network.

As described above, the communication terminal may correspond to either a general telephone or a mobile communication terminal. Here, a mobile communication terminal will be described as an example.

In addition, when the communication terminal is a communication terminal supporting voice-over Internet Protocol, the transmitter 920 may transmit a call signal to the counterpart terminal using the voice-over Internet protocol of the terminal And when the communication terminal is a communication terminal that does not support the voice-over Internet protocol, the communication terminal transmits a call signal to the counterpart terminal via the voice-over internet protocol server.

Also, the transmitting unit 920 can transmit an automatic response to the counterpart terminal, and the IP address of the voice-over Internet Protocol server can be designated by the user of the communication terminal.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims. It will be possible.

1 is an exemplary diagram illustrating a wired / wireless communication network configuration.

2 is a diagram illustrating an operation of a communication terminal through a VoIP server according to an embodiment of the present invention.

3 is an exemplary diagram for explaining an operation using a communication terminal supporting Voice over Internet Protocol (VoIP) according to another embodiment of the automatic call switching method of the communication terminal according to the present invention.

4 is a flowchart illustrating an automatic call switching method of a communication terminal according to an exemplary embodiment of the present invention.

5 is a flowchart illustrating a method for determining whether to roam abroad according to another embodiment of the present invention.

6 is a flowchart illustrating a step of determining whether to perform a next step of an automatic call switching method of a communication terminal according to another embodiment of the present invention.

7 is a flowchart illustrating a step of transmitting an automatic response to a counterpart terminal of an automatic call switching method of a communication terminal according to another embodiment of the present invention.

FIG. 8 is a flowchart illustrating a method for automatically switching a communication terminal according to another embodiment of the present invention.

9 is a block diagram illustrating a communication terminal having an automatic call switching function according to an embodiment of the present invention.

Description of the Related Art

1000: communication terminal 1010:

1020: transmitting unit 1030: wireless transmitting /

Claims (18)

In the communication terminal, Extracting a telephone number of the counterpart terminal using the call signal transmitted from the counterpart terminal; Confirming the extracted phone number of the counterpart terminal and determining whether the call is overseas roaming; And And transmitting the call signal to the counterpart terminal using the telephone number of the counterpart terminal extracted from the communication terminal through the Internet network. The method according to claim 1, Wherein the communication terminal is a mobile communication terminal. The method according to claim 1, When the communication terminal is a communication terminal supporting the voice over internet protocol, transmitting a call signal to the counterpart terminal using the Internet network in the communication terminal uses a voice over internet protocol of the communication terminal, And the call originating information is transmitted to the communication terminal. The method according to claim 1, When the communication terminal is a communication terminal that does not support the voice-over Internet protocol, the step of transmitting a call signal to the counterpart terminal using the Internet network in the communication terminal transmits a call signal via the voice-over internet protocol server Wherein the automatic call switching method of the communication terminal comprises: 5. The method of claim 4, Wherein the IP address of the voice-over Internet Protocol server can be designated by the user of the communication terminal. The method according to claim 1, Wherein the use of the automatic call switching method of the communication terminal can be specified by the user of the communication terminal. delete The method according to claim 1, Further comprising the step of confirming the extracted telephone number of the counterpart terminal and selecting whether or not to proceed to the next step. The method according to claim 1, Further comprising the step of transmitting an automatic response to the counterpart terminal. 10. The method of claim 9, Wherein the automatic answer is a short message. 10. The method of claim 9, Wherein the automatic response is a voice message. In the communication terminal, A receiving unit for extracting a telephone number of the other party using the call signal transmitted from the counterpart terminal in the communication terminal; And And a transmitter for transmitting a call signal to the counterpart terminal using the extracted phone number of the counterpart terminal through the Internet network, Wherein the communication terminal has an automatic call switching function for confirming whether or not it is roaming abroad by checking a telephone number of the extracted counterpart terminal. 13. The method of claim 12, Wherein the communication terminal is a mobile communication terminal. 13. The method of claim 12, Wherein the calling unit transmits a call signal to the counterpart terminal using the voice over internet protocol of the communication terminal when the communication terminal is a communication terminal supporting the voice over internet protocol Communication terminal. 13. The method of claim 12, Wherein the calling unit transmits a call signal to the counterpart terminal via the voice over internet protocol server when the communication terminal is a communication terminal that does not support the voice over internet protocol, . 16. The method of claim 15, Wherein the IP address of the voice-over internet protocol server is designated by the user of the communication terminal. 13. The method of claim 12, Wherein the use of the automatic call switching function of the communication terminal is designated by the user of the communication terminal. 13. The method of claim 12, And the originator transmits an automatic response to the counterpart terminal.
KR1020080062815A 2008-06-30 2008-06-30 Method of automatic call changing of telecommunication equipment and telecommunication equipment performing the same KR101539117B1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010044725A (en) * 2001-03-20 2001-06-05 김태범 System and method for providing communication call back service on internet
KR20050103487A (en) * 2005-08-02 2005-10-31 유키오 쿠보 Speech communication system, server used for the same, and reception relay device
KR20060103389A (en) * 2005-03-26 2006-09-29 김석운 Automatic call forwarding system and international roaming method
KR20060108405A (en) * 2005-04-13 2006-10-18 시스템베이스 주식회사 The receipt of a message conversion apparatus and the method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010044725A (en) * 2001-03-20 2001-06-05 김태범 System and method for providing communication call back service on internet
KR20060103389A (en) * 2005-03-26 2006-09-29 김석운 Automatic call forwarding system and international roaming method
KR20060108405A (en) * 2005-04-13 2006-10-18 시스템베이스 주식회사 The receipt of a message conversion apparatus and the method thereof
KR20050103487A (en) * 2005-08-02 2005-10-31 유키오 쿠보 Speech communication system, server used for the same, and reception relay device

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