KR20050022729A - method of call processing for caller information in private branch exchange - Google Patents

Abstract

PURPOSE: A method for processing a CID(Caller Identification) call of a PBX(Private Branch Exchange) is provided to request a CID when a random caller without the CID requests a call to be received, and to call an extension subscriber only when the caller shows the CID, thereby protecting the extension subscriber. CONSTITUTION: A controller senses a local signal called with a ring group representative number through a local circuit(S11). If a No.7 receiving signal is sensed, the controller confirms whether a CID is included(S12). If not, the controller transmits a message requesting the CID to a local exchange(S13). If the message is received, the controller exactly analyzes the message, and decides whether the CID exists(S14). If so, the controller transmits a ring signal and the CID to a digital phone of an extension subscriber(S15). When a random receiver responds to the signal, the ring signal is released(S16).

Description

Method of call processing for caller information in private branch exchange}

The present invention relates to a method for processing caller information in a private exchange, and more particularly, to a method for processing caller information in a private exchange that displays caller information to an extension subscriber when a NO.7 trunk line signal is received by a ring group representative number. will be.

The exchange is developed for the purpose of telephone exchange, which is the most commonly used basic communication service, and basically consists of a call system in which voice is input, exchanged and output, and a control system controlling the same.

It is classified into mechanical, inverted and all-electric according to the configuration of the currency path system, and classified into manual, mechanical, and electronic according to the control system configuration.PBX (Private Branch Exchange), It is divided into a local exchange, a long distance exchange, and an international exchange, and recently, an ISDN exchange that accommodates an ISDN function has been developed and distributed.

Here, the private exchange generally allows a plurality of extension lines to be shared and used by a plurality of extension subscribers.

Briefly looking at the flow of the station subscriber connected to the private exchange to send the CO line signal, the subscriber of the private exchange presses the CO line access code for the CO line call, and enters the number of the other party if the CO line connection is successful. When the subscriber completes input of the other party's number, the other party rings through the trunk line.

In this case, the phone number of the other party inputted by the subscriber who transmits the trunk line signal is displayed on a liquid crystal display (hereinafter referred to as an LCD) of the subscriber's digital phone. The subscriber can visually check the other party's telephone number displayed on the LCD of the digital phone to confirm whether the input of the telephone number is correct.

On the other hand, when the flow of the trunk line signal is received by the station subscriber connected to the private exchange briefly, if the incoming call is detected through the trunk line of the private exchange, the ring ring to the called party selected by the calling party. At this time, ringback tone is provided to calling party subscriber.

In this case, there may be a case where the caller name and the calling party number are included in the trunk line signal received by the calling party according to the trunk line signaling method. If the trunk line signal contains the calling party's name and calling party's phone number, the calling party's name and calling party's phone number are displayed on the LCD of the called party's digital phone. The called party can visually check the calling party name displayed on the LCD of the DGP to confirm the calling party before the call.

This caller ID display service is also commonly referred to as a "Caller ID" service, that is, a "CID" service.

CID services are based on CCITT (Consultative Committee on International Telephone and Telegraphy), the caller using the signaling standards in accordance with the current International Telecommunications Union-Telecommunication Standardization Sector (ITU-T) V.32. Caller's name, or phone number as a unique identification number, the service that provides the time information according to the call origination and incoming.

Currently, CID service is widely used in terms of the benefits of protecting the privacy of recipients in connection with phone calls, and the protection of call reception options through caller confirmation. Now, when a call is received through a wired or wired / wireless phone used at home, it is possible to check the caller information displayed on the display window to select and make a phone call. You can check the caller information that appears on the screened call.

On the other hand, a ring group means that when a call is received by a ring group representative number, all ringing terminals already registered in the ring group ring at the same time. It is a service that is made and the ring is stopped in the rest of the terminal ringing.

Conventionally, when the incoming call number and class are not received in IAM (Initial Address Message), which is the first incoming message when ringing, the ring group representative number is used as the trunk line incoming function of the private exchange. There is a problem that there is no way to accurately display the calling number information and calling grade on the destination digital phone with LCD because it can not be processed.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide a caller information processing method of a private exchange for processing caller information when the caller information is not included in a call received through a trunk line. have.

In the caller information call processing method of the private exchange according to the present invention for achieving the above object, it is determined whether the caller information is included in the incoming call of No.7 when the incoming call for any ring group representative number is detected through the trunk line. And if the call result does not include the caller information (calling number and caller's grade), sending a message requesting caller information (INR) to the calling party within a predetermined time. When receiving a message (INF, INFormation message) containing the caller information from the calling party, transmitting a ring signal containing the caller information to the subscribers of the ring group, and the incoming call received from the calling party within a certain time If the call does not contain caller information, send the Release Message message to the player to call the call. It performs the step of releasing agent.

Hereinafter, a caller information call processing method of a private exchange according to an embodiment of the present invention will be described with reference to the accompanying drawings.

Figure 1 shows a schematic block diagram of a private exchange as applied to the present invention.

Referring to FIG. 1, the controller 10 controls the overall operation of the private exchange according to the program set in the ROM 11.

The control unit 10 registers the CID request function in ring group management. Configure the ring group that specified the CID request function in the ring group related database. Register a member to the ring group. For example, register 2000, 2001, 2002 as members. In addition, when interworking with the national exchange 30, the NO.7 trunk line signaling method is selected so that the external trunk line subscriber receives the NO.7 trunk line with the ring group representative number (if the CID function is designated) of the private exchange.

At this time, the calling number and calling information can be displayed on the screen of the digital phone with LCD. On the contrary, if the calling party's requested information is wrong or the originating information itself is not received at all, the REL (Release message) message is sent to the first calling exchange in order to reject incoming call. Attempt to release the Citation.

The ROM 11 stores an initial program and an operation program of the controller 10.

The RAM 12 stores the extension number for performing the exchange function and the data generated according to the function execution.

The switching circuit 13 performs a switching operation under the control of the controller 10 to form a loop for making calls between stations and between stations.

The trunk line circuit 14 connects a plurality of trunk lines drawn from a local exchange (not shown) to the switching circuit 13 under the control of the controller 10.

The extension subscriber circuit 15 monitors the state of a plurality of extension subscribers (general telephones), and performs a function of supplying a call current during a call. In addition, a plurality of general telephones are connected to the switching circuit 13 under the control of the controller 10.

The ring generator 16 transmits the ring under the control of the controller 10 in response to a call request to a specific extension subscriber applied through the trunk line circuit 14 and the extension subscriber circuit 15.

The dual tone multi frequency (DTMF) receiving unit 17 analyzes the DTMF signals received through the trunk line circuit 14 and the internal subscriber circuit 15, converts the DTMF signals into digital data, and provides them to the controller 10. .

The DTMF generation unit 18 converts the digital data output from the control unit 10 into a DTMF signal and outputs it to the switching circuit 13.

Here, the subscriber's telephone connected to the private exchange may use a digital phone including an LCD.

2 is an overall operation flowchart for displaying the other party information when the trunk line incoming according to the present invention.

Referring to FIG. 2, when the caller 40 makes a trunk line transmission (S1), the local exchange 30 transmits a trunk line signal to the corresponding destination side private exchange 20. At this time, as the trunk line incoming function of the private exchange, the initial group message IAM (Initial Address Message) is transmitted to the private branch exchange 20 at the ring group representative number.

The private exchange 20 receives the IAM and determines whether there is caller information (caller number or calling party's grade) in the IAM, and if the caller information is not included in the IAM message, the CID in the caller ID request option. If the function is designated, the national exchange 30 transmits an information request message (INR: INformation Request message) including the calling number and calling grade (S3).

The national exchange 30 that receives the calling number request (INR) message transmits a message (INF) including an information about the calling number and calling grade (INF) (S4). Only when the private exchange receives this, the trunk line incoming is normally received by the called party 10, and the caller information and the ring signal are transmitted to the called party 10 (S5), and any one of any terminals belonging to the ring group receives the incoming response signal. (S6) This sends an ANM (ANswer Message), which is a response message notifying the incoming subscriber's incoming response to the local exchange 30 (S6). (S7) The national exchange 30 attempts to make a call to No.7. The caller 40 is notified to set the call path (S8). At this time, a normal voice call is possible.

On the other hand, even after a certain time elapses after sending the message (INR) requesting caller information, the CID information requested by the called party is not received from the corresponding INF message, even if the INF message is not received or the INF message is received. If it cannot be extracted at all, the incoming call itself should be rejected.

3 shows a flowchart in which a called subscriber receives a trunk line signal at a private exchange. Referring to FIG. 3, the controller 10 detects a trunk line signal called by a ring group representative number through the trunk line circuit 14 (S11). Here, the trunk line circuit 14 typically includes a circuit for detecting the incoming signal, analyzes the subscriber subscriber number through the control unit 10, and processes the call according to the trunk line incoming call flow chart.

When the No.7 incoming signal is detected, the controller 10 checks whether the No.7 incoming signal includes caller information, for example, a caller's telephone number and a caller's grade (S12).

As a result of the check, if the caller information is included in the trunk line signal, the controller 10 searches for the extension subscriber corresponding to the ring group representative number of the recipient station subscriber included in the trunk line signal.

On the other hand, if it is determined that the caller information is not included in the CO line signal, the controller 10 transmits a message (INR message) requesting the caller information to the local exchange 30 (S13).

The private exchange 30 that sent the INR message waits for a predetermined time and waits for the sender information to be transmitted from the local exchange 30. If the INF message is received from the local exchange 40 within a predetermined time, the INF message is accurately analyzed to determine whether there is outgoing information (S14). If the caller wants to receive the information (calling number and caller grade) correctly, he or she should process the normal NO.7 incoming call only to receive the ring signal and caller information (caller caller and subscriber). Number) is transmitted together (S15). If there is a response from any called party 10 to release the ring signal (S16).

On the other hand, if the sender information is not received or there is no response signal even after a certain time after transmitting the message requesting the caller information, the call exchange signal to the local exchange 30, and forcibly releases the call. (S17).

As described above, in the detailed description of the present invention, specific embodiments have been described. However, various modifications may be made 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 defined by the claims below and equivalents thereof.

As described above, when the originating information is not included in the IAM message, a message for requesting the calling party information is transmitted, and when the calling party information is received from the power station, the calling party information is displayed on the extension subscriber terminal. Otherwise, by forcibly releasing an incoming call from a large country, the caller's information may be known in advance before the call is made, giving the subscriber the option of receiving a call. By blocking at all, the subscriber's personal life can be protected from unintended callers.

1 is a schematic block diagram of a private exchange system applied to the present invention.

2 is an overall operation flowchart for displaying the other party information when the trunk line incoming according to the present invention.

3 is a flowchart in which a called subscriber receives a trunk line signal at a private exchange.

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

10: control unit 11: ROM

12 RAM 13 Switching Circuit

14: trunk line circuit 15: internal subscriber circuit

16: dedicated subscriber circuit 17: ring generator

18: DTMF receiver 19: DTMF transmitter

Claims (2)

Determining whether an incoming call includes caller information when an incoming call to an arbitrary ring group representative number is detected through a trunk line; If the incoming call does not include the caller information, sending a message requesting the caller information to the calling party; When the incoming call including the caller information is received from the calling party within a predetermined time, transmitting a ring signal including the caller information to the extension subscribers of the corresponding ring group; If the incoming call received from the calling party does not include the caller information within a certain time, the caller information call processing method of the private exchange to perform a step of forcibly releasing the call by sending a call release message to the power. According to claim 1, wherein the caller information, A caller information call processing method of a private exchange comprising at least one of a caller's telephone number and a calling grade.