KR19990055977A - Priority-based call forwarding method at the private branch exchange - Google Patents

Abstract

end. TECHNICAL FIELD OF THE INVENTION

To an incoming call transfer method in a private branch exchange.

I. Technical Problems to be Solved by the Invention

There is provided an incoming call switching method for sequentially assigning an incoming call according to the designated priority by designating a plurality of terminals in advance according to a predetermined priority when performing an incoming call switching operation in a private branch exchange.

All. The point of the solution of the invention

A method of terminating a call in a private branch exchange, comprising the steps of: setting a plurality of terminals previously designated in a state in which an incoming call transfer function is set to a terminal to which an incoming call is to be switched; assigning a priority to the established terminal; The mobile station switches the incoming call sequentially to the established mobile station according to the designated priority, and when there is a mobile station responding to the switched call, connects the answered mobile station to the incoming mobile station The call transfer method comprising the steps of:

la. Important Uses of the Invention

PABX where the call forwarding function is performed.

Description

Priority-based call forwarding method at the private branch exchange

The present invention relates to a call switching method in a private branch exchange, and more particularly, it relates to a call switching method in a private branch exchange, in which a plurality of terminals are previously designated according to a predetermined priority order when an incoming call switching operation is performed in a private branch exchange, To-call switching method.

The term "normal call forwarding" refers to a function that allows all incoming calls to the private branch exchange to be forwarded to an external telephone subscriber designated in advance or to a predefined extension subscriber.

The above-mentioned method for switching an incoming call from a private branch exchange to a call destined for an external subscriber and an extension subscriber is disclosed in Korean Patent Application No. 88-9672 filed on July 30, 1988 by the present applicant, entitled " Method ".

On the other hand, in the case of the incoming call switching method in the private branch exchange disclosed in the above patent, it can be seen that there is only a function of switching the incoming call to a predetermined terminal. In addition to the above-mentioned patent, the call forwarding function of a private branch exchange which is conventionally used is configured to switch a call that is received only in a single word designated in advance by a user through a predetermined setting process. That is, the call forwarding function implemented in the private branch exchange is a function that allows a user to pre-designate a place where the user is absent or a telephone number of the terminal in advance so that the user can receive the incoming call will be.

However, in the conventional call switching function implemented in the private branch exchange, only one terminal is designated, and when an incoming call is switched, the call is switched to only one terminal. Therefore, There has been a problem in that it is not possible to switch an incoming call to the terminal. For example, a user using a wireless pager or a mobile phone designates a terminal to which an incoming call is to be transferred through an incoming call switching function implemented in the PABX in the absence of the user. Therefore, when an error occurs in the terminal specified by the call forwarding switching, there arises a problem that the called call can not be received.

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SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an apparatus and method for switching a call between a called terminal and a designated terminal in order to sequentially assign a plurality of terminals according to a predetermined priority, Conversion method.

According to another aspect of the present invention, there is provided a method for switching an incoming call of a private branch exchange, comprising the steps of: setting a plurality of terminals predetermined in a call forwarding function setting state to a terminal to which a call to be forwarded is switched; When the incoming call is detected, switching the incoming call sequentially to the established terminal according to the designated priority, and if there is a terminal that has a response to the switched call, And a call path between the called party and the called party.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a private branch exchange in which the present invention is implemented; FIG.

FIG. 2 is a flowchart for setting an incoming call transfer function according to a priority according to the present invention; FIG.

3 is a flow diagram illustrating an operation for switching an incoming call according to a priority in accordance with the present invention;

4 is a memory map of a private branch exchange according to an embodiment of the present invention;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. In addition, the terms described in the embodiments of the present invention described below may vary depending on the situation or intention of the practitioner, and therefore should be recognized based on the overall contents of the present specification.

1 is a block diagram of a PBX in which the present invention is implemented.

1, the central processing unit 100 processes a set program, controls a call switch, and controls various services and operations according to the present invention. A RAM (Random Access Memory) 110 has a program and data processing area, and is composed of a plurality of buffers and is used as a working memory of the central processing unit 10. [ The ROM 120 includes a call control program and initial service data for performing a call and various functions. Under the control of the central processing unit 100, the switching circuit 130 switches various tone and voice data, connection between extensions, connection of a trunk line, and the like. The general subscriber circuit 140 performs interfacing between a general telephone set of a plurality of subscribers and the apparatus. The ring generator 150 outputs a ring signal in the form of a square wave to the general subscriber circuit 140. The key phone subscriber circuit 160 performs interfacing between a plurality of key telephone sets and a device. The tone generator 170 is controlled by the central processing unit 100 and forms a trunk loop by visualizing the trunk line. In addition, an incoming signal received through the CO is interfaced. The DTMF detecting apparatus 190 is called a combined frequency detecting apparatus and detects and analyzes a DTMF signal inputted through the general subscriber circuit 140 and the CO line circuit 180, that is, a singleton frequency signal such as a composite 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 central processing unit 100. The clock circuit 105 is a device for generating a reference time of the PBX, and performs a timer function. The caller identification signal detecting unit 210 detects the telephone number of the external trunk line or the corresponding information inputted through the trunk line circuit 180 and detects the extension number of the trunk line or information corresponding thereto. The ROM 120 is allocated with a memory area for processing and storing caller information detected by the caller identification signal detector 210. In addition, an area for storing telephone number information of terminals required according to the present invention is also allocated. A memory map showing an information storage area of the terminals is shown in FIG. 4 attached hereto.

FIG. 2 is a flowchart illustrating a process of setting an incoming call switching operation according to a priority according to the present invention, and the operation is performed during the setting of the incoming call switching function.

Referring to FIG. 2, in step 22, the PABX is in a standby state. In step 24, the central processing unit 100 determines whether there is a predetermined input for setting an incoming call transfer function from the extension terminal of the subscriber performing the present invention. If it is determined in step 24 that there is no incoming call switching function setting input, the corresponding function corresponding to another input command is performed in step 25. If it is determined in step 24 that there is an incoming call switching function setting input, it is determined in step 26 whether there is an input for designating priority terminals. If it is determined in step 26 that there is an input corresponding to the priority terminal designation, in step 28, a priority is assigned to the terminal that is switched when an incoming call is transferred, and the state is set to set up the call terminal. In the state of step 28, a terminal to which a call is switched is set in a priority order. In this case, priority is a priority when a call is received by a user's extension terminal, and when the user is absent, The user sets and sets a procedure for switching the call in order to set the order so that a plurality of terminals can be selected and set by the terminal to which the incoming call is switched. So that the terminal can be selected by the user. For example, if the user wishes to set a call to be switched to a wireless pager and a mobile phone, the user first inputs the numbers of the two terminals, and, if the priority order of the two terminals is specified in advance, When a call is received, the call is first forwarded to the terminal having the priority according to the designated order, and if the terminal does not answer, the call is sequentially received to the terminal having the next highest priority. Accordingly, if the priority is designated in step 28, step 30 determines whether there is a predetermined input for verifying the completion of the designated state in step 28. [ That is, it is determined whether there is an input for completing the setting of the incoming call function according to the priority order according to the present invention. Meanwhile, if there is no input for designating the priority terminal in step 26, the conventional incoming call function setting operation is performed. Accordingly, in step 27, the number of the terminal to be transferred and the input corresponding thereto are received from the user, and the operation of setting the incoming call switching function is terminated. If the step 30 and the step 27 are performed, the step 32 is in the same waiting state as the step 22. Accordingly, the call forwarding function according to the present invention is set through the setting process of FIG.

FIG. 3 is a flowchart illustrating a method of performing an inbound call switching function according to a priority according to an embodiment of the present invention, which is a flowchart illustrating an inbound call switching operation performed in the state set in FIG.

Referring to FIG. 3, in step 34, the PAB is in a standby state. In step 36, it is determined whether there is a trunk line incoming to the trunk line circuit 180. If it is determined in step 36 that there is a trunk line to be incummed, it is determined in step 38 whether a caller identification function is set to the called party corresponding to the trunk to be incummed. If it is determined in step 38 that the caller identification function is set, the caller identification signal detection unit 210 detects the caller number in step 39, and stores the detected phone number in the ROM 120 in step 45. [ The telephone number stored in step 45 is then displayed on the terminal of the corresponding person or transmitted through the corresponding path. If it is determined in step 38 that the caller identification function is not set or step 45 is performed, it is determined in step 40 whether an incoming call transfer function is set. If it is determined in step 40 that the incoming call setup function is not set, the called station is called in step 41. If it is determined in step 40 that the incoming call switching function is set, it is determined in step 42 whether a terminal having a priority is designated when an incoming call is transferred. The determination of the priority order in step 42 is made by referring to the result set through the setting process shown in FIG. If it is determined in step 42 that a terminal having a priority is not designated, a general call forwarding function is performed in step 43. [ At this time, since the call transfer side is set in only one word, the call is switched only to the corresponding terminal. However, if it is determined in step 42 that the priority terminal is designated, in step 44, the information of the terminal having the designated priority set in the setting process of FIG. 2 is read from the ROM 120. As mentioned above, the information area of the terminals allocated to the ROM 120 is shown in FIG.

Referring to FIG. 4, a storage area from the terminal 1 to the terminal N is allocated, and priority is assigned to each terminal. In FIG. 4, the terminal 1 has the telephone number '1234', and the terminal is called when the call is switched in priority. The priority order is designated in correspondence with the number of the designated terminals, which can be expanded according to the storage capacity of the ROM 120. In step 44, information as shown in FIG. 4 is read, and in step 46, an incoming call switching operation is performed according to the read information. Then, in step 48, the call is switched to the terminal having the Nth priority, and the initial value of N is '1'. Referring to FIG. 4, the terminal 1 becomes the terminal 1, and the call is converted to the telephone number '1234'. In step 50, the call is switched in step 48 to determine whether the called Nth terminal responds. If the called terminal does not answer in step 50, that is, if the user does not receive a call through the terminal 1, the call is switched to the terminal having the next priority in step 51 and is called. this is. 'N = N + 1', and N is a priority, so the terminal having the next priority is called. If it is determined that there is a response from the terminal that is called in step 50, the terminal performs a call with the terminal that responded in step 52. If the responding terminal is a pager, the operation corresponding to the pager is performed in step 52. Otherwise, when the call is transferred to the voice mailbox apparatus, the operation corresponding to the operation performed by the voice mailbox apparatus is performed in step 52 .

As a result, according to the present invention, when a call is received to an extension terminal subscribed to a private branch exchange in which the call forwarding function is implemented, the extension terminal determines whether the terminal is an established terminal with the call forwarding function, It is determined whether or not the function of switching the incoming call according to the priority is set. If it is determined that the function of switching the incoming call according to the priority is set, the call is sequentially switched to the terminal according to the priority specified in advance and stored will be. Accordingly, the present invention is performed when a user specifies a priority number corresponding to each phone number and inputting a telephone number of a place where the user himself or herself is likely to be present.

As described above, according to the present invention, in a call forwarding method of a private branch exchange, there is an advantage that a call to be transferred to a plurality of terminals can be switched, so that a call to be received can be received. In addition, a plurality of terminals, which are set for switching the incoming call, are advantageously called in order of priority.

Claims (3)

In an incoming call switching method of a private branch exchange, A priority level is assigned to at least one of the terminals, the terminals assigned with the priority are set as switching terminals to which the incoming call is switched, and when an incoming call is detected, If there is a terminal responding to a call that is being switched in the sequential manner, stopping the switching operation that has progressed in sequence and returning the terminal to the terminal corresponding to the incoming call, Wherein the priority of the called party is changed according to the priority of the call. In an incoming call switching method of a private branch exchange, Setting a call forwarding function according to a priority order through a predetermined extension terminal; Determining whether an incoming call switching function is set in the extension terminal when an incoming call to an extension terminal in which an incoming call switching function is set according to the priority is set; Detecting a terminal to which an incoming call is to be transferred and determining a designated priority corresponding to each of the detected terminals when an incoming call switching function is set in the extension terminal; The method comprising the steps of sequentially switching an incoming subscribing station preference from a higher-priority subscriber station to a lower subscriber station, And if the mobile station responds to the incomming station preference in the switching process, connecting the call path to the terminal that has responded to the incoming station preference, in the private exchange, Conversion method. 3. The method as claimed in claim 2, wherein the step of setting an incoming call switching function according to the priority through a predetermined extension terminal comprises: The method comprising the steps of: setting up a terminal to which an incoming call is transferred to an extension terminal; and assigning a different priority to each established terminal by a user's selection, Incoming call transfer method.