KR20020017683A - Method for Selective Forwarding According to CID Informaion - Google Patents

Abstract

PURPOSE: A selective forward method according to a CID(Caller ID) OF a PBX(Private Branch Exchange) is provided to selectively forward a termination signal using the CID in case that a plurality of users share limited lines. CONSTITUTION: A PBX confirms whether a forward CID number exists in a corresponding subscription extension(S110). If the forward CID number exists in the corresponding subscription extension, it is confirmed whether the CID number is identical to a CID number inputted by an extension subscriber(S120). If the CID number is identical to the CID number inputted by the extension subscriber, a termination signal is forwarded to a receiving place number inputted by the extension subscriber(S121). If the forward CID number is not inputted, the PBX confirms a previously inputted forward type and designates the forward type as 0(no forward designation)/1(all)/2(busy)/3(no answer)(S130). A corresponding termination signal is forwarded to a receiving place number according to the confirmed forward type(S131).

Description

Method for Selective Forwarding According to CID Informaion}

The present invention relates to a selective forward method according to caller information of a private exchange system, and more particularly, to a method in which a receiver can directly select and receive a sender in a private exchange system.

The forward function of the private switching system is a function of switching the incoming call to the desired destination when the recipient cannot receive the incoming call to the current destination.

1 is a block diagram showing the configuration of an existing private exchange system, Figure 2 is a flow chart showing the forward function of the existing private exchange system step by step.

The private exchange system 10 is composed of an exchanger main board 11, an extension subscriber board 12, and a trunk line subscriber board 13.

The forward function of the existing private exchange system 10 is to select and input one of 1) ALL 2) BUSY 3) No Answer type, and then select an incoming call according to the input type. The forward function of the existing private exchange system 10 operates as follows.

When the subscriber extension 30 of the private exchange system 10 forwards an incoming call to a desired destination as needed, information about the forward is registered in the private exchange system 10 (S10). The forward information may be directly input by the subscriber subscriber 30 into the private exchange system 10 using the terminal. The forward type is specified by 0 (no forward designation) / 1 (ALL) / 2 (BUSY) / 3 (No Answer). Table 1 is a forward table, which summarizes forward types and destination numbers to be forwarded.

TABLE 1

Join extension type Destination number to be forwarded 2001 ALL 2000 (for internal subscribers) BUSY 9 + 460 + 4000 (for external subscribers) No answer 9 + 2630 + 1114 2002 No answer 5000

When an incoming call comes from the caller, the incoming call is forwarded to the desired destination by the forward type inputted by the extension subscriber (S11). By the forward type input by the extension subscriber and the destination number to be forwarded, the incoming call is forwarded to the destination of the number input by the extension subscriber.

The existing private exchange system forward function forwards all incoming calls to the destination regardless of the sender information. Therefore, even when caller information is provided at the time of incoming call, selective forwarding according to the calling number cannot be performed.

SUMMARY OF THE INVENTION An object of the present invention is to provide a selective forwarding method according to caller information of a private exchange system for selectively forwarding an incoming call using the caller's information when a large number of people share a limited line. .

1 is a block diagram showing the configuration of an existing private exchange system,

2 is a flowchart illustrating a forward function of an existing private exchange system step by step;

3 is a flowchart illustrating a process of a selective forward method according to caller information according to an embodiment of the present invention.

In order to achieve the above object, in the selective forwarding method according to the caller information of the private exchange system according to the present invention, if an incoming call is detected at the subscription extension, it is checked whether there is a forward CID number in the selective forward table of the subscription extension. (A); (B) comparing the caller information with the forward CID number if the forward CID number exists after the confirmation; And according to the comparison result, when the caller information and the forward CID number match, forward the incoming call to the destination number to be forwarded by the extension subscriber, and when the caller information and the forward CID number do not match, the incoming call. It characterized in that it comprises a step (c) that does not forward.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

Prior to the detailed description, terms used below are summarized to describe a selective forward method according to caller information of a private exchange system according to the present invention.

The 'forward CID number' is caller information input by the extension subscriber, and is a phone number of the caller to be forwarded selectively. It is used to selectively forward an incoming call from the originator with the forward CID number.

3 is a flowchart illustrating a processing step of a selective forward method according to caller information according to an embodiment of the present invention.

In order to apply the present embodiment, the private exchange system may assign a forward table for assigning a forward type and a destination number to be forwarded for each type, and a caller information and a destination number to be forwarded for selective forwarding. Allocate a memory space for storing an optional forward table.

The extension subscriber enters a forward type and a destination number to be forwarded (S100). The forward information can be directly entered by the extension subscriber into the private exchange system using the terminal. The forward type is specified as 0 (no forward designation) / 1 (ALL) / 2 (BUSY) / 3 (No Answer) / 4 (optional forward). If the extension selected 4, enter the forward CID number. The forward type entered by the subscriber and the destination number to be forwarded are stored in the forward table for each subscriber. Table 2 shows a forward table modified by the present invention, which summarizes the forward type and the destination number to be forwarded, and Table 3 summarizes the selective forward table for each subscriber.

TABLE 2

Join extension type Destination number to be forwarded 2001 ALL 2000 (for internal subscribers) BUSY 9 + 460 + 4000 (for external subscribers) No answer 9 + 2630 + 1114 Selective forward 9 + 444 + 5555 2002 No answer 5000

TABLE 3

Join extension Forward CID Number 2001 222 + 1000 8000 333 + 2000

When the caller calls the subscription extension, the private exchange system verifies that the subscription extension has a forward CID number. If there is a forward CID number, the process proceeds to step S120, and if there is no forward CID number, the process proceeds to step S130 (S110).

If the forward CID number is input in step S110, it is checked whether the forwarder ID and the forward CID number input by the extension subscriber match (S120). The caller information is the caller's phone number.

If the caller information and the forward CID number input by the extension subscriber match, the incoming call is forwarded to the destination number to be forwarded by the extension subscriber (S121).

If the forward CID number is not input in step S110, the private exchange system checks the forward type. The forward type is designated as 0 (no forward designation) / 1 (ALL) / 2 (BUSY) / 3 (No Answer) (S130). The forward information can be directly entered by the extension subscriber into the private exchange system using the terminal.

According to the forward type identified in step S131, the incoming call is forwarded to the destination number to be forwarded (S131).

The field of the present invention can be utilized is a private exchange system of the grouping method used by existing companies. In the grouping method, all phones generate a ring, so they can be applied when it is necessary to block a certain noise or create a quiet state.

As described above, according to the selective forward method according to the sender information of the private exchange system according to the present invention, the receiver can select the caller to forward the incoming call. In addition, when the number of circuits is currently limited, and a large number of people share the limited circuits, only incoming calls of the callers who have already entered are forwarded, thereby making it possible to use the limited circuits usefully. Therefore, due to the selective forward information input by the individual personnel sharing the limited line, the private exchange system may reduce the forwarding of all incoming calls, thereby preventing overload due to the capacity overrun of the private exchange system.

Claims (4)

If an incoming call is detected at the subscription extension, checking whether there is a forward CID number in the selective forward table of the subscription extension (a); (B) comparing the caller information with the forward CID number if the forward CID number exists after the confirmation; And According to the comparison result, when the caller information and the forward CID number match, forward the incoming call to the destination number to be forwarded by the extension subscriber, and when the caller information and the forward CID number do not match, the incoming call is sent. And a step (c) of not forwarding the selective forwarding method according to the caller information of the private exchange system. The method of claim 1, And (d) before the step (a), wherein the extension subscriber inputs a forward type, a destination number to be forwarded, and a forward CID number. The method of claim 1, And wherein the selective forward table allocates and stores a predetermined portion of a memory of the private exchange system. The method of claim 1, In step (b), if there is no forward CID number, the forwarding method according to the caller information of the private exchange system, characterized in that forwarding the forwarding by the forward type stored in the forward table.