KR20100119216A - Method and system for providing caller identification - Google Patents

Method and system for providing caller identification Download PDF

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Publication number
KR20100119216A
KR20100119216A KR1020090038213A KR20090038213A KR20100119216A KR 20100119216 A KR20100119216 A KR 20100119216A KR 1020090038213 A KR1020090038213 A KR 1020090038213A KR 20090038213 A KR20090038213 A KR 20090038213A KR 20100119216 A KR20100119216 A KR 20100119216A
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KR
South Korea
Prior art keywords
calling
terminal
caller
receiving
signal
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KR1020090038213A
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Korean (ko)
Inventor
이은정
Original Assignee
주식회사 엘지유플러스
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Priority to KR1020090038213A priority Critical patent/KR20100119216A/en
Publication of KR20100119216A publication Critical patent/KR20100119216A/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M3/00Automatic or semi-automatic exchanges
    • H04M3/42Systems providing special services or facilities to subscribers
    • H04M3/42025Calling or Called party identification service
    • H04M3/42034Calling party identification service
    • H04M3/42042Notifying the called party of information on the calling party
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/16Communication-related supplementary services, e.g. call-transfer or call-hold
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W8/00Network data management
    • H04W8/18Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
    • H04W8/20Transfer of user or subscriber data

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Databases & Information Systems (AREA)
  • Telephonic Communication Services (AREA)

Abstract

PURPOSE: A method and a system for providing a caller number are provided to track an original originating number of an originating terminal even though the originating terminal changes a reply number. CONSTITUTION: A receiving unit(210) receives an originating signal including a reply number and a receiving number from an originating terminal. An identifying unit(220) identifies an originating number corresponding to the originating terminal by the received originating signal. A transmitting unit(260) transmits an originating signal including the identified originating number to a receiving terminal related to the receiving number instead of the reply number. A determining unit(240) determines whether the reply number is the same as the identified originating number.

Description

Method and system for providing calling number {METHOD AND SYSTEM FOR PROVIDING CALLER IDENTIFICATION}

The present invention relates to a method and a system for providing a calling number.

Due to the development of communication technology, portable terminals are used by most users from elementary school students to the elderly regardless of gender or age. Reflecting the trend of the times, in addition to the function of making a voice call or sending a text message, the portable terminal has recently made a video call, photographed by operating a mounted camera, or watching satellite / terrestrial DMB broadcasting. Or to play a built-in game.

On the other hand, mobile communication companies provide a variety of services in accordance with the increased specifications and user needs of the mobile terminal. Among them, the Caller Identification Presentation Service transmits the caller's telephone number to the receiving terminal when the calling terminal calls the receiving terminal so that the calling party's telephone number or caller's name is displayed on the receiving terminal's screen. have.

However, in the case of spam calls, most of the spam calls do not expose the caller's telephone number, and only the reply number, which the sender can change arbitrarily, is delivered to the receiving terminal, so that the receiver cannot know who the caller is. In this case, the receiver has a high risk of being exposed to an illegal situation by answering the telephone without checking who is calling.

Recently, financial fraud over the phone, such as Voice Phishing, has become a social issue, and it is recommended that calls not received by phone numbers unknown to the recipient itself be accepted.

Therefore, there is a need for a way to track the caller by notifying the caller of the original phone number.

According to an embodiment of the present invention, when an outgoing signal is generated from an originating terminal, when the reply number included in the outgoing signal is different from the outgoing number that is the original phone number of the outgoing terminal, the outgoing number is transmitted instead of the reply number. Method for providing a calling number to send the original calling number of the calling terminal to the receiving terminal by sending the message to the receiving terminal by sending it to the receiving terminal by including the signal in a spam or illegally changing the reply number; Provide a system.

One embodiment of the present invention provides a method and a system for providing a calling number that can determine whether to transmit an original telephone number of a calling terminal that has originated a signal to the called terminal according to whether a receiving terminal is subscribed to a calling number display service. do.

According to an embodiment of the present invention, when the reply number received from the calling terminal is not the same as the calling number which is the original telephone number of the calling terminal, the caller information associated with the calling terminal is recorded to make the calling terminal spam or illegal user. Provides a method and system for providing a calling number that can be classified.

One embodiment of the present invention provides a method and a system for providing a calling number that allows a receiver to check the original telephone number of a calling terminal by transmitting the original telephone number of the calling terminal together with the reply number received from the calling terminal. .

Calling number providing system according to an embodiment of the present invention is a receiving unit for receiving an outgoing signal including a reply number and a receiving number from the calling terminal, identification for identifying the calling number corresponding to the calling terminal from the received outgoing signal And a transmitting unit for transmitting an outgoing signal including the identified calling number to a receiving terminal associated with the receiving number instead of the reply number.

A method for providing a calling number according to an embodiment of the present invention comprises the steps of: receiving an outgoing signal including a reply number and a receiving number from a calling terminal, identifying a calling number corresponding to the calling terminal from the received outgoing signal; And including the identified calling number in the received calling signal and transmitting the same to the receiving terminal associated with the called number.

According to an embodiment of the present invention, even if the calling terminal changes the reply number to spam or illegally, even if the calling terminal calls or sends a message, the original calling number of the calling terminal can be tracked.

According to an embodiment of the present invention, when the reply number received from the calling terminal is not the same as the calling number which is the original telephone number of the calling terminal, the caller information associated with the calling terminal is recorded to spam or illegal the calling terminal. By classifying as a user, special management can be performed.

According to an embodiment of the present invention, even when the calling terminal changes the reply number and makes a call to the receiving terminal or transmits a message, the calling terminal transmits the original phone number and reply number of the calling terminal to the receiving terminal. Make sure you have your original phone number.

Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings and accompanying drawings, but the present invention is not limited to or limited by the embodiments.

The calling terminal or receiving terminal used in the present invention collectively refers to all mobile devices, for example, a notebook computer, a cellular phone, a personal communication service (PCS) phone, satellite / terrestrial wave. As well as DMB (Digital Multimedia Broadcasting) phone, PDA (Personal Digital Assistant), PMP (Portable Multimedia Player), MP3 Player and the like.

1 is a diagram illustrating a network connection relationship between a calling number providing system, a calling number display service server, a calling terminal, and a receiving terminal according to an embodiment of the present invention.

As shown, the calling terminal 110 may generate a call signal by the caller's manipulation to make a call or to send a message to the receiving terminal 160.

In an embodiment of the present invention, the calling terminal 110 may generate an outgoing signal including a calling number, a reply number, and a receiving number. Here, the outgoing signal may be a call signal for a call or a signal for message transmission according to an embodiment. The calling number is a phone number uniquely assigned to the terminal, the original phone number of the calling terminal 100, and the reply number is a number displayed on the screen of the receiving terminal 160, and is distinguished from the calling number. The receiving number is the telephone number of the receiving terminal 160. That is, the reply number and the reception number may be changed by the caller of the calling terminal 100, but the calling number may not be arbitrarily changed by the caller.

In another embodiment of the present invention, the calling terminal 110 may generate an outgoing signal including a terminal identifier, a reply number, and a receiving number. The terminal identifier is an identifier uniquely assigned to the terminal, such as the calling number, and may be used when identifying the calling number corresponding to the calling terminal 110.

In another embodiment of the present invention, the calling terminal 110 may generate an outgoing signal including a calling number, a replying number, and a receiving number in each data field according to a predefined rule. For example, the outgoing signal is divided into a data field associated with a calling number, a data field associated with a reply number, and a data field associated with a reception number, so that the calling terminal 110 includes a number corresponding to each divided data field. Can be.

The base station 120 receives the generated outgoing signal, and transmits the outgoing signal to the calling number providing system 100 when the outgoing signal is associated with a 'call', and when the outgoing signal is associated with a 'message', a message service center. Forward to 130. The base station 120 serves as an interface between the source terminal 110 located in the selected cell and the switching center.

The short message service center 130 receives the outgoing signal through the base station 120 and transmits the outgoing signal to the outgoing number providing system 100. The message service center 130 is responsible for transmitting and receiving messages between terminals, and may transmit a message (outgoing signal) received from the calling terminal 110 to the receiving terminal 160. Here, the message service center 130 transmits the call signal to the call number providing system 100 to identify the call number from the call signal.

The calling number providing system 100 receives the calling signal and identifies the calling number corresponding to the calling terminal 110 from the received calling signal.

In an embodiment of the present invention, the caller ID providing system 100 may be provided with a database for maintaining a caller ID corresponding to the caller terminal in advance, and identify the caller ID corresponding to the caller terminal 110 from the database.

In another embodiment of the present invention, the source number providing system 100 may further include a terminal identifier in the database to identify the source number corresponding to the terminal identifier included in the source signal from the database.

In another embodiment of the present invention, the calling number providing system 100 may identify the calling number from the data field associated with the calling number included in the calling signal.

The calling number providing system 100 determines whether the reply number and the identified calling number are the same. As a result of the determination, if it is not the same, the caller ID providing system 100 may determine whether the receiving terminal 160 associated with the caller ID is subscribed to the caller ID service by interworking with the caller ID service server 140. .

The caller ID presentation service server 140 may maintain a phone number of a terminal subscribed to the caller ID presentation service.

As a result of determination, when the receiving terminal 160 is subscribed to the calling number display service, the calling number providing system 100 deletes the reply number included in the received calling signal, and identifies the received calling signal. Can include the originating number. Accordingly, the calling number providing system 100 transmits the calling signal including the identified calling number to the receiving terminal 160 through the base station 150 instead of the reply number.

2 is a block diagram showing the configuration of a caller ID system according to an embodiment of the present invention.

As shown, the caller ID system 200 includes a receiver 210, an identifier 220, a database 230, a determiner 240, a correction unit 250, a transmitter 260, and a storage unit. 270 may include.

The receiving unit 210 receives an outgoing signal including a reply number and a receiving number from the calling terminal 110. According to an embodiment, the outgoing signal may be a call signal for a call or a signal for message transmission.

In an embodiment of the present invention, the outgoing signal may include an outgoing number which is the original phone number of the outgoing terminal 110 together with the reply number and the received number. The calling number is a phone number uniquely assigned to the terminal, the original phone number of the calling terminal 100, and the reply number is a number displayed on the screen of the receiving terminal 160, and is distinguished from the calling number. The receiving number is the telephone number of the receiving terminal 160.

In another embodiment of the present invention, the outgoing signal may include a terminal identifier together with the reply number and the received number. The terminal identifier is an identifier uniquely assigned to the terminal, such as the calling number, and may be used when identifying the calling number corresponding to the calling terminal 110.

According to another embodiment of the present invention, the calling signal has a 'calling number' in a data field associated with a calling number, a 'calling number' in a data field associated with a reply number, and a called number according to a predefined rule. The 'data number' may be included in the associated data field. That is, each data field of the outgoing signal may be determined according to an advance appointment with the outgoing number providing system 200.

The identification unit 220 identifies the calling number corresponding to the calling terminal 110 from the received calling signal. In an embodiment of the present invention, the identification unit 220 may identify the calling number corresponding to the calling terminal 110 from the database 230 that maintains the calling number corresponding to the calling terminal 110.

3 is a diagram illustrating an example of a database included in a caller ID system according to an embodiment of the present invention.

As shown, the database 230 may include information on the terminal identifier, telephone number, service, history corresponding to the terminal.

The information described in the 'terminal' field is for the type of terminal that the subscriber decides to use when the subscriber joins the mobile carrier. For example, the type of terminal may be 'LG-LH5000', 'LG-KU9100', 'LG-KH8000'. Here, the terminal is a concept that collectively the calling terminal 110 and the receiving terminal 160, the subscriber is a concept that collectively refers to the sender of the calling terminal 110, the receiver of the receiving terminal 160.

The 'terminal identifier' is an identifier uniquely assigned to each terminal and may be used to identify the terminal such as a calling number. For example, the terminal identifier may be represented as '00001', '00011', or '00111'.

'Phone number' is the original phone number of the terminal, the subscriber can not change arbitrarily. In the present invention, the original telephone number of the terminal is collectively referred to as the 'calling number'.

The information described in the 'service' field is information on the service details of the subscriber subscribed to the mobile carrier. For example, the service may include calling number display, call waiting, peeling, manner call, bead ring, anti-spam, dual number.

The information described in the 'history' field is about whether the subscriber changes the reply number displayed on the receiving terminal 160 when making a call or transmitting a message. For example, when calling or sending a message without changing the reply number, 'none' is recorded in the history field, and when the reply number is changed, the changed reply number '1577-8000', '1004', '486', '8282' can be recorded.

That is, according to the embodiment of the present invention, the identification unit 220 identifies whether the calling number included in the calling signal is stored in the database 230, and stores the calling number as the calling number corresponding to the calling terminal 110. Can be identified.

In another embodiment of the present invention, the identification unit 220 identifies whether the terminal identifier included in the outgoing signal is stored in the database 230, and identifies the calling party number corresponding to the identified terminal identifier from the database 230. can do. For example, when the terminal identifier included in the outgoing signal is '00001', the identification unit 220 may identify '010-333-5555' as the outgoing number corresponding to '00001'.

In another embodiment of the present invention, the identification unit 220 may identify the calling number from the data field associated with the calling number included in the calling signal.

4 is a diagram illustrating an example of an outgoing signal according to an embodiment of the present invention.

As shown, the outgoing signal has a 'calling number (010-9334-1234)' in the data field 410 associated with the calling number and a 'calling number (1577-8000)' in the data field 420 associated with the reply number. The data field 430 associated with the reception number may include a 'reception number (010-333-5555)'. Accordingly, the identification unit 220 may identify the calling number from the data field associated with the calling number, identify the reply number from the data field associated with the reply number, and identify the receiving number from the data field associated with the receiving number.

The determination unit 240 determines whether the reply number and the identified calling number are the same as the reply number.

As a result of the determination, when the reply number and the identified calling number are the same, the transmitting unit 260 transmits the calling signal including the identified calling number to the receiving terminal 160 associated with the receiving number. That is, since the calling number and the replying number are the same, it does not matter which number of the two numbers is transmitted to the receiving terminal 160.

However, as a result of the determination, if the caller ID and the reply number are not the same, the determination unit 240 determines whether the receiving terminal 160 is subscribed to the caller ID service. Referring to FIG. 3, the determination unit 240 may determine whether the receiving terminal 160 is subscribed to the calling number display service based on the information recorded in the 'service' field corresponding to the telephone number of the receiving terminal 160. have. If the receiving unit 160 is '010-333-5555' or '010-456-7890', the determination unit 240 determines that the caller ID is subscribed to the service, and the receiving terminal 160 is determined. If '010-9334-1234', it can be determined that the subscriber is not subscribed to the calling number display service.

As a result of the determination, when the receiving terminal 160 is not subscribed to the calling number display service, the transmitting unit 260 transmits the calling signal not including the reply number and the calling number to the receiving terminal 160 associated with the receiving number. To send).

Alternatively, when the reception terminal 160 is subscribed to the calling number display service, the correction unit 250 deletes the reply number included in the received outgoing signal and replaces the deleted reply number. Include the identified calling number in the received calling signal. That is, since the reply number is a changeable number of the caller, when the reply number is transmitted to the receiving terminal 160 as it is, the receiver does not know who the caller is. In order to solve this problem, the correction unit 250 is to include the calling number in the outgoing signal instead of the reply number.

Therefore, the transmitter 260 transmits the outgoing signal including the outgoing number to the receiving terminal 160 instead of the reply number. That is, the transmitting unit 260 transmits the caller ID which cannot be changed in place of the changeable reply number to the receiving terminal 160, so that the receiver can identify the caller through the caller ID. According to an exemplary embodiment of the present invention, the transmitter 260 may include the reply number together with the call number and send the reply number to the receiving terminal 160.

If the calling number is already stored in the receiving terminal 160, the receiving terminal 160 displays the stored calling party name along with the calling number on the screen, so that the receiver can determine who the calling party is. will be. If the calling number is a signal associated with a 'call', the receiving terminal 160 displays the calling number on the screen and notifies that the call is from the caller. Alternatively, when the caller ID is a signal associated with the message, the receiving terminal 160 may display the caller ID and the message content on the screen.

According to an embodiment, when both the reply number and the caller number are received, the receiving terminal 160 may display the reply number and the caller number alternately, or display both the reply number and the caller number at once. .

In an embodiment of the present invention, when the calling number and the reply number are not the same, the storage unit 270 records caller information associated with the calling terminal 110. The caller information may include a caller name, a calling number, and a replying number. Although not shown, the storage unit 270 may store 'none' or reply number as the caller information corresponding to the calling terminal, such as the information described in the 'history' field stored in the database 230. As a result, the calling number providing system 200 may determine whether the calling terminal 110 transmits a reply number differently from the calling number through the calling party information stored in the storage unit 270. For example, the calling number providing system 200 classifies the calling party information stored in the storage unit 270 as a 'black list', and when the number of times of changing the reply number exceeds 10 times, determines the spam or illegal subscriber. can do.

Subsequently, when the caller ID providing system 200 receives a request for tracking the caller from the receiver terminal 160, the caller ID system 200 may transmit the caller information to the receiver terminal 160. Therefore, the receiver may request the caller information to the calling number providing system 200 to track the caller.

5 is a flowchart illustrating a procedure of a caller ID providing method according to an embodiment of the present invention.

The caller ID providing method may be implemented by the caller ID providing system 200 of the present invention. Therefore, in the description of FIG. 5, the present invention will be understood by referring to the aforementioned FIG. 2 together.

In step 510, the calling terminal 110 transmits the calling signal including the reply number and the receiving number to the calling number providing system 200.

In an embodiment of the present invention, the outgoing signal may include an outgoing number which is the original phone number of the outgoing terminal 110 together with the reply number and the received number. In another embodiment of the present invention, the outgoing signal may include a terminal identifier together with the reply number and the received number. According to another embodiment of the present invention, the calling signal has a 'calling number' in a data field associated with a calling number, a 'calling number' in a data field associated with a reply number, and a called number according to a predefined rule. The 'data number' may be included in the associated data field.

In step 520, the calling number providing system 200 identifies the calling number from the calling signal. The outgoing signal may be a call signal for 'call' or a signal for 'message' transmission.

In step 530, the calling number providing system 200 determines whether the reply number and the identified calling number are the same. If the reply number and the caller ID are the same, the caller ID providing system 200 performs step 550. If the reply number and the caller ID are not the same, the caller ID providing system 200 performs step 540. can do.

In steps 540 and 550, the caller ID providing system 200 deletes the reply number from the caller and includes the identified caller ID in the caller instead of the deleted reply number. The calling number providing system 200 transmits the calling signal including the calling number to the receiving terminal 160.

In operation 560, the receiving terminal 160 receives the calling signal and displays the calling number on the screen. Thus, the receiver of the receiving terminal 160 will be able to accurately determine who the sender.

Further, embodiments of the present invention include a computer readable medium having program instructions for performing various computer implemented operations. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. Program instructions recorded on the media may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code, such as produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter.

While specific embodiments of the present invention have been described so far, various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the equivalents of the claims and the claims.

1 is a diagram illustrating a network connection relationship between a calling number providing system, a calling number display service server, a calling terminal, and a receiving terminal according to an embodiment of the present invention.

2 is a block diagram showing the configuration of a caller ID system according to an embodiment of the present invention.

3 is a diagram illustrating an example of a database included in a caller ID system according to an embodiment of the present invention.

4 is a diagram illustrating an example of an outgoing signal according to an embodiment of the present invention.

5 is a flowchart illustrating a procedure of a caller ID providing method according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

200: caller ID system

210: receiver

220: identification unit

230: database

240: judgment unit

250: government

260: transmission unit

270 storage

Claims (15)

A receiving unit for receiving an outgoing signal including a reply number and a received number from a calling terminal; An identification unit for identifying a calling number corresponding to the calling terminal from the received calling signal; And Instead of the reply number, a transmission unit for transmitting a transmission signal including the identified calling number to a receiving terminal associated with the receiving number Including, caller ID providing system. The method of claim 1, A determination unit which determines whether the reply number and the identified calling number are the same; And If it is not the same as a result of the determination, a correction unit for deleting the reply number included in the received outgoing signal and including the identified outgoing number in the received outgoing signal. Further comprising, the calling number providing system. The method of claim 1, Database that maintains calling number corresponding to calling terminal More, The identification unit, Calling number providing system for identifying the calling number corresponding to the calling terminal that transmitted the calling signal from the database. The method of claim 1, The outgoing signal further includes a terminal identifier, Database that maintains calling number corresponding to terminal identifier More, The identification unit, Caller ID providing system for identifying a caller ID corresponding to the terminal identifier included in the caller from the database. The method of claim 1, The calling signal includes a calling number, a replying number, and a receiving number in each data field according to a predefined rule, The identification unit, Caller ID providing system that identifies the caller ID from the data field associated with the caller ID included in the caller. The method of claim 1, Determination unit for determining whether the receiving terminal associated with the received number is subscribed to the calling number display service More, The transmission unit, And, if subscribed, transmits an outgoing signal including the identified outgoing number to a receiving terminal associated with the outgoing number, instead of the reply number. The method of claim 1, A determination unit which determines whether the reply number and the identified calling number are the same; And If it is not the same as a result of the determination, the storage unit for recording the caller information associated with the calling terminal Further comprising, the calling number providing system. The method of claim 7, wherein The transmission unit Calling number providing system for transmitting the caller information stored in the storage to the receiving terminal in response to a request of the receiving terminal. Receiving a calling signal including a reply number and a receiving number from a calling terminal; Identifying a calling number corresponding to the calling terminal from the received calling signal; And Including the identified calling number in the received calling signal and transmitting the same to the called terminal associated with the called number. Including, caller ID providing method. 10. The method of claim 9, Determining whether the reply number and the identified calling number are the same; And Deleting the reply number included in the received outgoing signal if it is not the same as a result of the determination; Further comprising, the calling number providing method. 10. The method of claim 9, Maintaining the calling number corresponding to the calling terminal in the database More, Identifying the calling number corresponding to the calling terminal, Identifying a calling number corresponding to a calling terminal which has transmitted the calling signal from the database; Including, caller ID providing method. 10. The method of claim 9, The outgoing signal further includes a terminal identifier, Maintaining a calling number corresponding to the terminal identifier in a database; More, Identifying the calling number corresponding to the calling terminal, Identifying a calling number corresponding to the terminal identifier included in the calling signal from the database; Including, caller ID providing method. 10. The method of claim 9, The calling signal includes a calling number, a replying number, and a receiving number in each data field according to a predefined rule, Identifying the calling number corresponding to the calling terminal, Identifying the calling number from a data field associated with the calling number included in the calling signal; Including, caller ID providing method. 10. The method of claim 9, Determining whether a receiving terminal associated with the receiving number is subscribed to a calling number display service; And Deleting the reply number included in the received outgoing signal when subscribed; Further comprising, the calling number providing method. 10. The method of claim 9, Determining whether the reply number and the identified calling number are the same; Recording caller information associated with the calling terminal if it is not the same as a result of the determination; And Transmitting the recorded caller information to the receiving terminal in response to a request of the receiving terminal; Further comprising, the calling number providing method.
KR1020090038213A 2009-04-30 2009-04-30 Method and system for providing caller identification KR20100119216A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150106738A (en) * 2014-03-12 2015-09-22 에스케이텔레콤 주식회사 Call relay apparatus and control method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150106738A (en) * 2014-03-12 2015-09-22 에스케이텔레콤 주식회사 Call relay apparatus and control method thereof

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