KR19990026364A - Multiple call forwarding method in private exchange - Google Patents

Abstract

end. The technical field to which the invention described in the claims belongs

The present invention relates to an incoming call switching method in a private exchange.

I. The technical problem to be solved by the invention

When performing an incoming call switching operation in a private exchange, a method of switching a call to a terminal set differently according to a predetermined day and time is implemented.

All. Summary of Solution of the Invention

When a call is received to a terminal subscribed to a private exchange, if it is determined that the incoming call switching function is set by checking whether the incoming call switching function is set, the determination is made by determining the day and time when the call is received. It characterized in that the incoming call is switched to the terminal set to switch the call corresponding to the day and time of the day.

la. Important uses of the invention

The present invention is used in a private exchange in which an incoming call switching function is performed.

Description

Multiple call forwarding method in private exchange

The present invention relates to a call forwarding method in a private exchange, and more particularly, to a method of switching a call to a terminal set differently according to a predetermined day and time when performing a call forwarding operation in a private exchange.

In general, an incoming call switching function in a private exchange refers to a function of converting an incoming call to a predetermined external trunk line terminal or a predetermined extension terminal for all incoming calls received at the private exchange. That is, when an extension terminal user subscribed to a private exchange leaves his / her office or is absent from work, he / she transfers a call that is received to him to another place where he moves. For example, if the user designates and inputs a predetermined external subscriber number and sets the call forwarding function through the extension terminal when necessary, the user can receive the call through the designated external subscriber terminal. will be.

However, such a call forwarding function used in a conventional private exchange could not receive a call that is received by the subscriber when the subscriber continuously moves to another place as needed instead of one place. That is, in the conventional private exchange, the call forwarding function is performed only to a specific phone number that has been designated regardless of the day of the week and the time. Therefore, when a user moves a place, a call number of a place where a user can receive a call each time is moved. It had to be newly designated, which brought a lot of trouble and inconvenience to the user.

Accordingly, the present invention is to implement a method for switching a call to the terminal set differently according to a predetermined day and time when the incoming call switching operation in the private exchange.

Thus, when a call is received by a terminal subscribed to a private exchange, if it is determined that the incoming call switching function is set by checking whether the incoming call switching function is set, the day and time when the call is received are determined. The present invention proposes a method for switching the incoming call to a terminal set to switch a call corresponding to the determined day and time.

1 is a block diagram of a private exchange in accordance with the present invention;

2 is a state transition diagram showing a multiple incoming call switching operation state according to the present invention;

3A is a flowchart illustrating a first process of performing a multiple incoming call switching operation according to the present invention;

3B is a flowchart illustrating a second process of performing a multiple incoming call switching operation according to the present invention;

3C is a flowchart illustrating a third process of performing a multiple incoming call switching operation according to the present invention;

Hereinafter, a detailed description according to an embodiment of the present invention will be described with reference to the accompanying drawings. In the embodiments of the present invention described below, detailed descriptions thereof will be omitted when there are conventional known functions and methods in connection with the present invention. In addition, the terms described in the embodiments of the present invention described below may vary according to the situation or intention of the practitioner, and should be recognized based on the general contents of the present specification.

1 is a block diagram of a private exchange in accordance with a preferred embodiment of the present invention.

Referring to FIG. 1, the central processing unit 100 controls a call switch by processing a set program and controls various services and operations according to the present invention. The RAM 110 includes a program and data processing area, and is composed of a plurality of various buffers and used as a working memory of the CPU 100. The ROM 120 includes control programs and initial service data for performing calls and various functions. The switching circuit 130 switches various tone and voice data, connections between stations, and connections of trunk lines under the control of the CPU 100. The general subscriber circuit 140 performs interfacing between a general telephone and a device of a plurality of subscribers. The ring generator 150 outputs a ring signal in the form of a square wave to the general subscriber circuit 140. Key phone subscriber circuit 160 performs the interface between a plurality of key phone telephones and the device. The tone generator 170 is controlled by the central processing unit 100, and scissor the trunk line to form a trunk line loop. In addition, an incoming signal received through the trunk line is interfaced. The DTMF detector 190 is called a complex frequency detector and detects and analyzes a DTMF signal input through the general subscriber circuit 140 and the trunk line circuit, that is, a single tone frequency signal such as a complex frequency and a busy tone. The DTMF generator 200 is called a complex frequency generator, and outputs a DTMF signal to the switching circuit 130 under the control of the CPU 100. The voice mail device (VMS) 105 is connected to a part of the extension subscribers to hold a mailbox of each extension subscriber and the VMS 105 receives an incoming call when the extension subscriber is absent and forwards or receives a message. In addition, the VMS105 processes a voice message or an outgoing message (OGM), that is, a voice guidance message input and output through the trunk line circuit 180 and the general subscriber circuit 140, and the voice message and the OGM are stored in the VMS105.

2 is a state transition diagram illustrating a multiple incoming call switching operation state according to the present invention. That is, when the private exchange performs the incoming call switching operation, it indicates a change in state of the private exchange.

Hereinafter, referring to FIG. 2, state 210 is a state in which the private exchange controls a trunk line call. When the call is received from the outside in the 210 state, through the connection side 212 and the connection operation to which the call is switched, the call is in the 214 state for checking a database related to the terminal state. In step 214, it is determined that the terminal state is set to the call switching operation, and through the call switching operation activation operation 218, it becomes 220 to search the call switching database. The call transfer database includes at least two operation programs for performing the call transfer function and corresponding database information storage areas, and each storage area transfers calls to different destinations according to different days and times. The information classified into the operation program and the database information to perform the operation is stored separately. In the state 220, a time / day comparison operation 222 in which the call is received is set to state 224 in which the time / day is detected. In the state 224, through the time / day determination operation 226, the state changes to the state 220 again. If there is an operation 228 in which call transfer information is input in the 220 state, the operation state 230 is entered, and the OGM transmission operation 230 is performed, or the operation 215 is called through AA (Auto Answering) / VMS (Voice Mail System). / 217 is a state in which the VMS control and detection operation is performed. When operation 221 in which the predetermined key is input in state 217 is performed, the state enters 223 in which the input key is detected. When the checking operation 225 of the input key is performed in the 223 state, the 223 state is restored to the 217 state. When the voice guidance operation 219 is performed in the state 217, the state returns to the state 210. At this time, operation 230 for transmitting the OGM to the outside is performed. In the case of inputting a key for updating the function detection / call transfer database in the state 223, the function detection and call transfer database update operation 227 is performed, and the state becomes 220.

That is, the state of the private exchange according to the present invention is, as mentioned above, the trunk line control state, terminal state database check state, call switching database search state, time / day detection state, input key detection state, AA / VMS control And classified into a detection state, and if there is a corresponding command according to each state, the states are converted to each other to perform a function accordingly.

In view of the state transition and other aspects of FIG. 2 according to the present invention described above, the operation of the present invention will be described with reference to FIGS. 3A, 3B, and 3C, which are attached below to help a clear understanding of the present invention.

3A is a flowchart illustrating a first process of performing a multiple incoming call switching operation according to the present invention.

Referring to FIG. 3A, a predetermined call is received at the private exchange in step 310. In step 312, the state of the terminal and the device to which the call is switched is checked regarding to which terminal or a predetermined device the incoming call is received. In step 314, it is determined whether the terminal of the terminal and the device is called. When the terminal is called in step 314, in step 316, the call transfer state database in which the operation program and information on the call transfer state corresponding to the terminal is stored is checked. In step 318, the terminal determines whether the incoming call switching function is set according to the result of the check operation in step 316. If the incoming call switching function is not set, the basic call processing function of the private exchange is performed in step 319. If it is determined in step 318 that the incoming call switching function is set, the above-described first process is terminated, and step 320 of the second process shown in FIG. 3B is performed. In step 320, the call conversion database is searched. That is, the call transfer database including information on how the incoming call transfer function is performed or the incoming call transfer method is searched. In this case, as described above, the call transfer database has at least two operation programs for performing the call transfer function and corresponding database information storage areas, and each storage area has different incoming calls according to different days and times. The information classified as an operation program and database information for performing the incoming call switching function on the side, that is, the switching side is separately stored. The database includes information that is designated by a user in advance and that different conversion sides are designated in response to calls received by different days and times. In step 322, the day and time information of the time point at which the call is received are compared with the day and time information previously designated and stored in the call conversion database. That is, the comparison operation is for determining whether there is a switching side of a predetermined call corresponding to the day and time when the call is received. In step 324, the call conversion database corresponding to the day and time is searched for by the call transfer database, and then, the result is selected to be transferred. In step 326, the selected switching side is called, and in step 328, the call transfer function is performed. That is, when the first and second processes described above are summarized, when a call is received by the private exchange, if the call is received by the extension terminal and the call switching information is retrieved by the terminal, the incoming call switching function is set to the terminal. This is performed by determining which place the call is designated to be forwarded at the time when the call is received.

On the other hand, if it is determined that the call state of the terminal is not in step 314 of FIG. 3a, it is determined in step 315 whether the call response state of the automatic answering function (AA) / voice mail device (VMS). If it is determined in step 315 that the call state of the AA / VMS is not, the service corresponding to another function in step 321. However, in the AA / VMS call state, it is determined in step 317 whether the call is for updating the database of the extension terminal. If not, the function for the call is serviced in step 323. In the step 317, the database update call refers to a new call transfer state through a predetermined process by calling the corresponding terminal subscribed to the exchange from the outside with information on the incoming call transfer function previously specified in the call transfer database. Refers to a call to update a call transfer database. If it is determined in step 317 that the call is for updating the terminal database, the first process is terminated, and step 325 of the third process shown in FIG. In step 325, it is determined whether a password corresponding to the terminal is input and checked. That is, to determine whether the subscriber is eligible to update the call conversion database. If the password is not checked in step 325, the access state is released in step 334. If the password is confirmed and checked in step 325, in step 327, a menu according to the update operation of the database is selected and detected, and the OGM is transmitted accordingly. That is, the menu for setting the call forwarding function is transmitted to the user through the OGM by the VMS. In step 329, a key input in response to the menu, that is, the OGM, is detected. In step 331, the call transfer database is updated with information corresponding to the input key. In step 333, it is determined whether other services continue, and if it is determined that other services continue, in step 335, the OGM for the main menu is sent, and other functions are serviced according to the response. If it is determined in step 333 that other services do not continue, step 334 is performed.

That is, summarizing the above-described first process and the third process according to the above, when the user makes a call to the private exchange to change the call transfer database to new information, in response to the incoming call corresponding to the dialed call, AA The OGM is sent for updating a predetermined call transfer database via / VMS, and the user inputs necessary update information in response. Then, the incoming call switching function operates based on the newly updated information. For example, when a user changes a schedule due to a special situation, the telephone number or information of a call forwarding side predetermined for a previous schedule, i.e., the previous day and time, is dialed to the private exchange via an external trunk line to set the schedule. This is to receive a call that is received by the user according to the changed schedule by inputting the changed situation in the contracted order.

That is, the above-described present invention constitutes at least two call divert database areas related to the call forwarding function, implements a search algorithm for searching the call divert database, and the incoming call is different depending on the day and time. A management function for this is implemented to switch to a designated called party, and a function for enabling a user to update the call transfer database from outside and perform a processing operation accordingly.

As described above, the present invention does not switch the call to only one designated place when performing the call forwarding function. Since the call is switched to at least two designated destinations according to the day and time, there is an advantage in that the user may relieve the inconvenience of having to reset the information corresponding to the incoming call conversion every time the user moves the place.

In addition, the present invention has the advantage that can be changed newly to the side to the incoming call conversion through the external trunk line.

Claims (8)

In the incoming call switching method of the private exchange having the incoming call switching function to switch the call to a predetermined called party when the incoming call is received, the operation program for performing the function and the storage means for storing the database information accordingly, At least two operation programs for performing the incoming call switching function and corresponding database information storage areas in the storage means, and each storage area performs the incoming call switching function to different destinations according to different days and times. And storing information classified as an operation program and database information, and if there is a command for performing the call forwarding function through a predetermined terminal subscribed to the private exchange, determining the day and time at the time of the command, Read an operation program and database information for performing the incoming call switching function to the called party stored in the storage area corresponding to the determined day and time to perform the incoming call switching function according to the read information Multiple incoming calls for private exchanges How to ring. The method of claim 1, An operation program and database information stored in each of the storage areas and performing an incoming call switching function according to an operation of performing an incoming call switching function to different called parties according to the different days and times performed by a predetermined command include: An operation program and database information updated according to a command through a predetermined terminal subscribed to a private exchange and corresponding day and time inputs, and performing a call forwarding function classified and stored in the storage area corresponding to the updated information. The method of claim 1, wherein the incoming call switching function is performed according to the read updated information. The method of claim 1, Connecting to the private exchange via an external trunk line and storing the incoming call switching function according to the different days and times by being stored in each of the storage areas by a predetermined command and corresponding day and time input through the external trunk line. The program and database information is updated, and the multiple call forwarding method in a private exchange, characterized in that the additional call forwarding function is further performed according to the updated information. The method of claim 1, The operation program for performing the call forwarding function and the database information thereof may include: an operation program for inputting different day and time information by a terminal subscribed to the private exchange and an external trunk line connected to the private exchange; Corresponding to the input day and time information, an operation program for performing an incoming call switching operation corresponding to the day and time, a terminal telephone number of the called party to be switched by the operation program, and a corresponding day and time An operation program for causing the called party to be switched to be a voice mail device added to the private exchange, and for controlling the auto-response mode of the private exchange when it is determined that the terminal of the called party is not responding. Program and a sound sent during the automatic response mode control operation The method for switching multiple incoming calls in a private exchange comprising additional sex information message information. In the incoming call switching method of the private exchange, When a call arrives at a predetermined terminal subscribed to the private exchange, if it is determined that the incoming call switching function is set by checking whether the incoming call switching function is set, the day and time when the call is received are determined. And a method for causing the incoming call to be transferred to a terminal set to switch a call corresponding to the determined day and time. The method of claim 5, In the setting of the call forwarding function of the terminal, different call forwarding functions are set according to a plurality of days and times such that the call is forwarded to different terminals according to the day and time of the call. Multiple call forwarding method in an exchange. The method of claim 6, The method for setting a different call forwarding function according to a plurality of days and times may further include a method for connecting the incoming call forwarding function to the terminal of the private exchange via an external trunk line and setting the incoming call forwarding function through the external trunk line. Multiple call switching method in a private exchange characterized in that the. The method of claim 5, When a call is received to a predetermined terminal subscribed to the private exchange, the terminal determines whether the incoming call switching function is set and sets the incoming call switching function to an automatic answering function and a voicemail device implemented in the private exchange. And if it is determined that the function of the auto answering function and the voicemail device is performed in response to the incoming call, the method for switching multiple incoming calls in a private exchange.