KR19980065276A - Caller Screening Call Control Using Virtual Extension - Google Patents

Abstract

The present invention relates to a method for controlling caller screening call using a virtual extension number. In the related art, a caller of an external trunk line calls when a call ring rings when a user calls a simple electronic switch using a direct inward dialing (DID) trunk line. There was no way of knowing, and when the station subscriber was in the rejection state, there was a problem that the station subscriber could not answer any call of the station because the station ring did not ring for all trunk lines. Notify external callers who call themselves different virtual numbers so that subscribers can selectively call, depending on which number they are called from, so that the recipient can call selectively Even if it is in the state, the C.O.line call from the virtual number can be answered. Open the extension is effective to call the subscriber.

Description

Caller Screening Call Control Using Virtual Extension

The present invention is directed to a caller screening call control method using a virtual extension, in particular, the external caller calling the extension subscriber in advance of the different virtual extension number, and through a direct inward dialing (DID) trunk line of a simple electronic switching device. When receiving a call, the extension subscriber is directed to a caller selective call control method using a virtual extension that allows the extension subscriber to know who the call is from.

1 is a block diagram of a conventional simple electronic switch, and as shown therein, receives a call signal of an external caller from a telephone station (PX) and connects to a called extension; An extension telephone 11 configured to make an external caller's call through the simple electronic switching device 10 will be described.

2 is an operation flowchart of a conventional simple electronic switching device. As shown in FIG. 2, the simple electronic switching device 10 recognizes a signal called by an external caller and determines whether the corresponding extension telephone 11 is in a rejection state. If the call is rejected, the call is terminated. If the call is not rejected, the call is connected to the corresponding extension.

As described above, in the conventional method, the extension subscriber of the simplified electronic switching apparatus using the DID trunk line has no way of knowing who the caller of the incoming call is. There was a problem with not being able to talk to all external callers.

Therefore, the present invention was devised to solve the above-mentioned conventional problem, and the extension subscriber can teach the external caller different virtual extension numbers in advance, so that the call can be made through the DID trunk line of the simple electronic switching device. When receiving a call, it is intended to provide a method of enabling a caller to know who the call is from according to which number it is called from and when a call is received in the virtual extension number even when the call is rejected.

1 is a block diagram of a conventional simple electronic switching device

2 is an operation flowchart of a conventional simple electronic exchange device.

3 is a flowchart of inputting a virtual extension number using the present invention

4 is a flowchart illustrating a caller screening call control method using a virtual extension number of the present invention;

Explanation of symbols on the main parts of the drawings

10: simple electronic exchange device 11: extension telephone

The configuration of the present invention for achieving the above object is as shown in Fig. 1, except that the control method includes a first step of recognizing a DID trunk line called by an external caller; A second step of determining whether the call signal recognized in the first step is a valid extension number; A third step of determining whether the call signal determined in the second step is an actual extension number or a virtual number; In the third step, the call signal determined as the actual extension number is judged by the extension telephone to reject the call. If the call is rejected, the attendant is called. Otherwise, the CO line button of the corresponding telephone blinks and the CO line ring ( ring) ringing and making a call; A fifth step of selecting an extension corresponding to the virtual extension number with respect to the call signal determined as the virtual extension number in the third step; A sixth step of determining whether the extension selected in the fifth step is in a call and calling an attendant if the call is busy and calling the corresponding extension phone if not in a call; The shortcut button is blinked by the call signal of the sixth step, and the seventh step of making a call by ringing a CO line ring will be described in detail with reference to the accompanying drawings.

3 is a flowchart of inputting a virtual extension number using the present invention. As shown in the drawing, first, each extension subscriber dials a 'virtual number registration code (CODE)' to a simple electronic switch to register his or her virtual extension number. A virtual extension number is input, after the input is completed, the designated virtual extension number is sequentially input to the shortcut button of the extension subscriber telephone, and the input virtual extension number is input to the shortcut button and placed on the handset (on hook).

4 is an operation flowchart of a caller screening call control method using a virtual extension of the present invention. As shown in FIG. 4, a signal called by an external caller is transmitted to a simple electronic switching device, and the ID of the external caller in the simple electronic switching device. (DID) Recognizes the CO line, dials the extension number to be called by the external caller, and again determines whether it is a valid extension number in the simple electronic exchange device and connects the attendant if it is not valid. It determines whether it is a number or a virtual extension number.If it is an actual extension number, it judges whether it is in a rejection state.If it is in a rejection state, it calls an attendant. If the selected extension is busy by selecting the extension corresponding to the extension number You can connect the attendant, or the virtual extension button on the extension phone will blink and the CO line will ring, letting you know who the caller is.

As described above, in the caller screening call control method using the virtual extension of the present invention, an extension subscriber using a conventional DID trunk line may receive information about a receiver in advance for a trunk line call. Selective reply is possible, and even if the call is rejected, the call to be received has the effect of receiving the CO line ring using the virtual extension number.

Claims (1)

A first step of recognizing, by the simplified electronic switching device, a DID trunk line called by an external caller; A second step of determining whether the call signal recognized in the first step is a valid extension number; A third step of determining whether the call signal determined in the second step is an actual extension number or a virtual number; In the third step, the call signal determined as the actual extension number is determined by the extension telephone to reject the call. If the call is rejected, the attendant is called. Otherwise, the telephone line ring of the corresponding telephone rings. A fourth step; A fifth step of selecting an extension corresponding to the virtual extension number with respect to the call signal determined as the virtual extension number in the third step; A sixth step of determining whether the extension selected in the fifth step is in a call and calling an attendant if the call is busy and calling the corresponding extension phone if not in a call; Caller screening call control method using a virtual extension number comprising the seventh step of making a call ringing the corresponding CO line ring by the call signal of the sixth step.