KR19990017535A - Calling party number detection - 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

The present invention provides an incoming call switching method for receiving a caller's phone number and detecting the incoming call number when the private exchange is performed.

All. Summary of Solution of the Invention

After receiving and detecting the caller's telephone number when performing the incoming call switching operation in the private exchange, the detected telephone number is transmitted to the called party's called party according to the incoming call switching operation. do.

la. Important uses of the invention

The present invention has the advantage of knowing the telephone number of the calling party in the private exchange.

Description

Calling party number detection

The present invention relates to an incoming call switching method in a private exchange, and more particularly, to an incoming call switching method for receiving a caller's telephone number and detecting the incoming call number when performing the incoming call switching operation in the private exchange. .

In general, the call forwarding refers to a function of forwarding all incoming calls to a private exchange to a predetermined external telephone subscriber or to a predetermined extension subscriber.

In the private exchange that switches the call to the external subscriber and the extension subscriber, the incoming call switching method is Korean Patent Application No. 88-9672 filed by the applicant of July 30, 1988, title incoming automatic external switching method. It is described in detail below.

However, in the case of the call forwarding method disclosed in the patent, the call is simply transferred to an extension subscriber or an external subscriber, or when a call is made to an extension subscriber from the outside to leave a predetermined voice message. The subscriber could only check what message was entered, or if the extension subscriber carried the pager, only the function of notifying the status that the message had been implemented was implemented. In this case, the extension subscriber should check the message by calling his extension and if the contents of the message are requesting a call, it is inconvenient to remember the phone number and then dial again after listening to the message. there was. At this time, if you forget the phone number or if the message is recorded unclear, the problem was that you will not be able to call.

Accordingly, the present invention is to provide an incoming call switching method for receiving a call number of the calling party when performing the incoming call switching operation in the private exchange and transmitting the detected phone number to the place where the incoming call is switched.

In order to achieve the above object, the present invention receives and detects a caller's telephone number when performing an incoming call switching operation in a private exchange, and then detects the detected telephone number as a called party switched according to the incoming call switching operation. I would like to propose a method of transmitting a telephone number.

In addition, the present invention stores the detected telephone number in a memory for a user without a wireless pager receiving the telephone number, so that if the user wants to talk after listening to the recorded message while not in the memory, It additionally provides a method for enabling a caller to connect to a caller using a phone number stored in the caller.

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

2A is a flowchart illustrating a process in which an incoming call switching operation according to the present invention is performed.

FIG. 2B is a flowchart illustrating a process in which an incoming call switching operation is performed following the operation of FIG. 2A; FIG.

3 is a memory structure diagram of a voice storage unit and a phone number storage unit according to an embodiment of 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.

Referring to FIG. 1, the central processing unit 10 processes a set program to control a call switch and to control various services and operations according to the present invention. The RAM 11 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 10. The ROM 12 includes a control program and initial service data for performing calls and various functions. The switching circuit 13 switches various tone and voice data, connections between stations, connections of trunk lines, etc. under the control of the CPU 10. The general subscriber circuit 14 performs interfacing between a general telephone and a device of a plurality of subscribers. The ring generator 15 outputs a ring signal in the form of a square wave to the general subscriber circuit 14. Key phone subscriber circuit 16 performs the interface between a plurality of key phone telephones and the device. The tone generator 17 is controlled by the CPU 10, 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 19 is called a composite frequency detector and detects and analyzes a DTMF signal input through the general subscriber circuit 14 and the trunk line circuit 18, that is, a single tone frequency signal such as a composite frequency and a busy tone. The DTMF generator 20 is called a complex frequency generator and outputs a DTMF signal to the switching circuit 130 under the control of the CPU 10. The voice transmission and recording apparatus 21 processes a voice message or an outgoing message (EGM), i.e., a voice guidance message input and output through the trunk line circuit 18 and the general subscriber circuit 14, and the voice message and the OGM are stored in the voice storage unit 22. . The telephone number storage unit 23 stores the telephone number of the calling party to be input. The permanent phone number storage unit 23 may also implement the present invention using a memory implemented in the controller or the ROM 12 or the RAM 11. In addition, the voice transmission device and the recording device 21 are generally implemented in that a device having a voice mailbox function is used in addition to the private exchange.

2A is a flowchart illustrating a process of performing an incoming call switching operation according to the present invention, and FIG. 2B is a flowchart illustrating a process of performing an incoming call switching operation following the operation of FIG. 2A.

2A, the private exchange is in the idle state in step 90. Steps 100 to 130 correspond to the incoming call switching operation performed in the above-described known technique. That is, when there is a call coming through the trunk line circuit 18, the call is received at the corresponding station through the repeater or when the night designation mode is set, the call is received at the designated station. In this case, if it is determined in step 130 that the extension of the incoming call external switching mode is set, it is determined in step 140 whether the incoming call external switching mode is a switching to the pager. If it is determined in step 140 that the switch to the pager, the voice transmission and recording device 21 operates in step 150 transmits the OGM stored in the voice storage unit 22. For example, a voice message, such as a call will be read, is read and transmitted from an OGM area implemented in the voice storage unit. Then, the calling party sends another OGM to input a telephone number to be contacted. That is, the OGM has a content such as a phone number to which you want to be contacted. When the OGM is sent and a telephone number is input from the calling party in response thereto, the DTMF detecting device 19 detects the input telephone number and stores the telephone number in the telephone number storage 23. In addition, if there is a request for recording a voice message corresponding to the telephone number input and a response thereto, the voice message is stored in the voice storage 22 and disconnected. A memory structure diagram of the voice storage 22 and the phone number storage 23 is shown in FIG. 3. In step 160, the controller determines whether there is a blank line, and then reads the telephone number stored in the telephone number storage 23 to call the switched pager and input the read telephone number. When step 170 ends, step 90 is performed again. On the other hand, if it is determined in step 140 that the incoming external transfer mode is not the wireless call mode, it is determined in step 180 whether the incoming external transfer mode is the external transfer mode. If it is determined in step 180 that the external switching mode, in step 190 OGM reads the contents to switch the phone to the voice storage unit 22 and transmits, and generates a hold tone. In step 200, an empty trunk line is found and caught while the hold tone of step 190 is generated. If a blank CO line is detected in step 210, the call is transmitted to a telephone number that is externally switched. At this time, the DTMF detection device 19 detects a call state of the called party corresponding to the external telephone number to be switched, and determines whether a busy tone or ring back tone is generated at the called party. To judge. If a call tone is detected, the OGM is sent to the calling party through the voice transmission and recording device 21, and the two trunk lines of the calling party and the called party are disconnected. However, if a ring back tone is detected and a call is received at the called party, the two trunk lines are connected. When the call completion operation according to the disconnection operation or the connection operation of the two trunk lines ends, step 90 is repeated.

On the other hand, if it is determined that the incoming external transfer mode is not set in step 130 or the incoming external transfer mode is not determined to be the external transfer mode in step 180, step 220 shown in FIG. In step 220, it is determined whether the call forwarding mode is the internal transfer mode. If it is determined that the call transfer mode is the internal transfer mode, in step 230, the OGM is sent to switch the phone, the hold tone is generated, and the call is transferred to the forwarded extension. When the operation ends, the step 90 is repeated. If it is determined in step 220 that the incoming mode is not the internal switching mode, in step 240 it generates an OGM to switch to the voice transmission and recording apparatus 21 and stores the voice message transmitted from the calling party in the voice storage unit 22. When the process ends, the step 90 is repeated.

As described above, according to the present invention, in the method of call forwarding of the private exchange, the external call designation can be made by wireless calling, and at the same time, the calling party's telephone number can be known. The advantage is that you can make calls with the calling party without checking.

Claims (4)

In the incoming call switching method of a private exchange having a complex frequency detection device, when the incoming call switching operation is performed when the incoming call is switched from the private exchange to the wireless pager, a caller's telephone number is input to receive the complex frequency detection device. And detecting the private telephone number through the telephone number, and transmitting the detected telephone number to the wireless pager. Switching incoming and outgoing calls of a private exchange having a complex frequency detection device, a voice transmission and recording device for storing an input voice message or a pre-stored voice announcement message, and a voice storage unit for storing the voice message and the voice guidance message. In the method, A first process of detecting whether the extension is set to an incoming call switching mode when there is a call to an extension subscribed to the private exchange; and the incoming call switching mode is an external pager switching or an external trunk line switching or an extension switching. A second process of determining whether it is set to a second process, a third process of transmitting a voice guidance message of the voice storage unit pre-stored in correspondence with each switching state through the voice transmission and recording apparatus, and corresponding to the voice guidance message A fourth process of detecting and storing a telephone number answered through the complex frequency detection device; transmitting the stored telephone number to an external wireless pager, transferring a call to the external trunk line, or switching a call to the extension; Calling party number detection call switching method comprising the fifth step. The caller of claim 2, further comprising: storing a voice message of the calling party in the voice storage through the voice transmitting and recording device when the call is not transferred to the external trunk line or the extension. Number detection incoming call switching method. An incoming call switching method when the incoming call switching operation is set to an external wireless pager in a private exchange, comprising: a complex frequency detection device and a telephone number storage unit in the private exchange, and the telephone number input from the calling party is converted into the combined frequency. And detecting by the detection device to be stored in the telephone number storage unit, and transmitting the stored telephone number to the external pager.