KR100459567B1 - Method for servicing an incoming call in a switching system, particularly concerned with automatically receiving a call with an extension designated in a local originating number - Google Patents

Abstract

PURPOSE: A method for servicing an incoming call in a switching system is provided to analyze an originating number table when a local call is received, and to receive the call by connecting with an extension designated in an originating number, then to receive the call by connecting with an extension group if the extension is not designated. CONSTITUTION: When a local call is received, a local circuit informs a controller of the call, so that the controller can sense the call(311). The controller analyzes a general local receiving table and a DDI receiving table(313). The controller checks whether a receiving designation is an extension or an extension group(315). If the local call is designated for the extension, the controller forms a speech path between the extension and a local line(317). If the call is designated for the extension group, the controller checks whether an originating number exists(319). If so, the controller analyzes an originating number receiving table(323), and forms a speech path by connecting the local line with the extension(325).

Description

Incoming call service method of exchange system

The present invention relates to an incoming call service method of an exchange system, and more particularly to a method of receiving a call.

1 is a block diagram of a general exchange system, wherein the control unit 111 controls the overall switching of the key telephone system to control call switching and provide various services to a user. The ROM 112 stores basic calls and programs and initial service data of the control unit 111 for performing various functions. The RAM 113 temporarily stores data generated during program execution under the control of the controller 111.

The switching circuit 114 switches various tones and voice data under the control of the control unit 111. The subscriber circuit 115 supplies a call current to an extension subscriber (not shown) under the control of the control unit 111 and interfaces a signal between the extension subscriber and the switching circuit 114. Here, the extension refers to a line connecting the switching system and the subscriber telephone. The ring generator 116 generates a ring signal and supplies it to the subscriber line. The trunk line circuit 117 forms a trunk line call loop by seizing the trunk line under the control of the control unit 111, and interfaces a signal between the trunk line and the switching circuit 114. Here, the trunk line refers to a line connecting the trunk line circuit 119 and the national exchange.

The tone generator 118 generates various tone signals under the control of the controller 111 and outputs them to the switching circuit 114. A DTMF receiver 119 analyzes a DTMF signal input from the switching circuit 114, converts the DTMF signal into digital data, and outputs the digital data to the controller 111. Here, the DTMF signal input to the DTMF receiver 119 by the switching circuit 114 is a telephone number generated by the trunk line subscriber or a telephone number generated by an extension subscriber. The DTMF transmitter 120 converts the digital data output from the control unit 111 into a DTMF signal and outputs the DTMF signal to the switching circuit 114. Here, the DTMF signal output from the DTMF transmitter 120 becomes the telephone number of the trunk line subscriber generated when the station side calls the trunk line side.

When an incoming call occurs in an exchange system having the above configuration, it is conventionally driven as follows to service an incoming call. 2, the trunk line of the telephone number "280-9873" becomes a general trunk line, and "280-9874" to 280-9786 is a DDI trunk line A call of a trunk line occurs in the state where the trunk line circuit 117 is configured as described above. The controller 111 forwards the call to the designated station or extension group with reference to the general trunk line reception table as shown in Table 1 or the DDI reception table as shown in Table 2 according to the characteristics of the incoming trunk line.

TABLE 1

TABLE 2

When using an exchange as described above, the number of CO lines is generally much smaller than the number of extension subscribers. For this reason, when an incoming call arrives, it is common to call a specific extension group rather than to a specific extension. At this time, when the call is received by the extension group, an arbitrary subscriber of the corresponding extension group responds to form an incoming call path and transfers the call to the desired extension subscriber. In addition, even in the case of DDI service, if the DDI number is not as many as the number of extension subscribers, the above problems are caused.

Accordingly, an object of the present invention is to provide a method for automatically receiving a call to an extension specified in a CO line calling party number when an incoming call occurs in a switching system.

The present invention for achieving the above object is an incoming call service method of the exchange system having a caller ID ringing table, the caller ID table is analyzed when a national call is received, and if the caller designation corresponding to the caller ID is extension, the corresponding extension. Incoming service by connecting to the terminal, and if there is no extension designation is characterized in that the incoming service by connecting to the corresponding extension group.

In accordance with an embodiment of the present invention, the configuration of the exchange system for receiving the trunk line call is the same as that of FIG. 1, and the reference numerals are the same.

In an embodiment of the present invention, an extension to be called is designated by referring to a caller ID when a call is received. To this end, in addition to the general trunk line reception table as shown in Table 1 and the DDI reception table as shown in Table 2, an extension or extension group for a trunk line call is designated by referring to a caller ID ringing table. The caller ID destination table can be collectively inputted by the maintenance computer, and the caller ID can be entered at a time by pressing a predefined key at the extension.

Look at the process of creating the caller ID destination table.

The first method is a batch input by a Maintenance & Administration Personal computer (MAP) connected to the exchange system. The MAP is a device connected to the outside of the exchange system, and the operator prepares the caller ID ringing table by matching the telephone number of the trunk line caller who frequently contacts the specific subscriber.

The second method is for the subscriber to register the phone number of the subscriber who is frequently called. This method presses a predefined key while receiving a caller's telephone number while a subscriber station is performing a call function for a trunk line incoming call or terminates a trunk line incoming service. Then, the control unit 111 registers the corresponding caller's telephone number in the caller ID destination table and registers the corresponding subscriber in the extension group to which the corresponding subscriber belongs. At this time, the subscriber can register the calling party number with one key. The caller ID incoming table is made as shown in Table 3 below.

TABLE 3

3 is an extension according to a corresponding call when an incoming call occurs in a switching system including a general trunk line incoming table as shown in Table 1, a DDI incoming table as shown in Table 2, and a caller ID ringing table as shown in Table 3. It is a flowchart which shows the operation | movement which designates an extension of an extension group.

Referring to FIG. 3, when a trunk line is received, the trunk line circuit 117 notifies the controller 11, and the controller 111 detects the occurrence of the trunk line in step 311 and confirms the trunk line in which the call occurred. The general trunk line receiving table as shown in Table 1 and the DDI incoming table as shown in Table 2 are analyzed. In this case, after analyzing the called table, it is checked in step 315 whether a call designation corresponding to the corresponding local call is an extension or an extension group. In this case, if it is determined that the corresponding CO line is assigned to the extension, the control unit 111 controls the switching circuit 114 in step 317 to form a communication path between the corresponding extension and the CO line, and then service the incoming call in step 327.

However, if it is determined that the incoming call is assigned to the extension group in the trunk line call in step 315, the controller 111 checks the presence or absence of the calling party number in step 319. In this case, if the calling party number exists, the controller 323 analyzes the calling party number reception table as shown in Table 3 in step 323 and then controls the switching circuit 114 in step 325 to designate the extension and the designated extension corresponding to the calling party number. After the incoming line is connected to form a call path, the incoming call service is performed in step 327. However, if there is no calling party number in step 319, an extension group corresponding to the corresponding trunk line is designated in step 321, and the incoming call is serviced in step 327.

Accordingly, referring to the trunk line call reception operation according to an embodiment of the present invention, first, when an incoming call occurs, the station or extension group to be received is determined by referring to the general trunk line reception table and the DDI reception table. At this time, if the extension is designated, the incoming call is connected to the corresponding station subscriber. If the extension group is designated, the caller ID is checked. If there is no caller ID, the caller connects to the corresponding extension group. However, if there is the calling party number, the trunk line is connected to the corresponding station if the extension exists, referring to the calling party number table, and if the extension is not present (null state), the trunk line is connected to the corresponding extension group.

As described above, when the C.O.line call method according to an embodiment of the present invention is used, the C.O.line call can be divided into various extensions even without a DDI C.O.C., in the case of a subscriber in charge of a specific customer such as a customer support department. There is an advantage in that an incoming call path can be formed as soon as a call is generated from the corresponding customer.

1 is a diagram showing a block configuration of an exchange system.

2 is a view for explaining the service process of the incoming call in the conventional switching system

3 is a diagram illustrating a process of servicing an incoming call in an exchange system according to an embodiment of the present invention.

Claims (2)

In the incoming call service method of the switching system, Constructing a calling party number called table including an extension group and an extension set corresponding to the calling party number; Determining whether an extension or a group is designated by analyzing an incoming call designation corresponding to the calling party number of the local call based on the caller ID ringing table when the call is received; And If the incoming call designation is an extension, an incoming call service connected to the corresponding extension, and if there is no extension call designation, the incoming call service of the switching system comprising the step of selectively performing the incoming service by connecting to the corresponding extension group. Way. In the incoming call service method of the switching system, Comprising a trunk line incoming table including the incoming extension / extension group set in correspondence with the trunk line number, and a caller number incoming table including the extension group and extension set in correspondence to the calling party number; Determining whether a call designation of the call is an extension or an extension group based on the call line reception table; If the incoming call designation is an extension, connecting the corresponding extension to the trunk line to perform incoming service; Checking the calling party number if the incoming call designation is an extension group, and if the calling party number does not exist, connecting the corresponding extension group and the trunk line call to the incoming call service; Determining whether an extension or an extension group is designated by analyzing a call designation corresponding to the caller number based on the caller ID ringing table, if the caller number exists; And If the incoming call designation is an extension, an incoming call service connected to the corresponding extension, and if there is no extension call designation, the incoming call service of the switching system comprising the step of selectively performing the incoming service by connecting to the corresponding extension group. Way.

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