KR100270735B1 - Method for transfer a incoming call to voice mail system in pabx system - Google Patents

Abstract

PURPOSE: A method for converting a call from a PBX(Private Branch Exchange) to a VMS(Voice Mailing System) is provided to leave a voice message without inputting a mail box number and a password. CONSTITUTION: A caller is in a communication state with an extension subscriber(210). A VMT(Voice Mail Transfer) key is inputted(212). A VMS(Voice Mailing System) requests a VMS number input to the extension subscriber(214). The extension subscriber inputs a mail box number and a password of a subscriber for being converted(216). A system decides whether the extension subscriber is on-hooked(218). If so, the system stores the inputted numbers of the extension subscriber in a memory of a PBX(Private branch Exchange)(220). The system reads out the stored numbers to call the VMS(222). The system delivers a calling sound to the caller in respond to the calling of the VMS(224). The system decides whether the VMS responds(226). If so, the system delivers an OGM(Outing Going Message) to the caller(228). The system decides whether the OGM is completed from the caller(230). If so, the system completes a process.

Description

How to transfer a call to a voicemail from a private exchange {METHOD FOR TRANSFER A INCOMING CALL TO VOICE MAIL SYSTEM IN PABX SYSTEM}

The present invention relates to a call transfer method in a private exchange. In particular, when an extension subscriber attempts to transfer a call while an extension is in a busy state with an external caller in the private exchange, the voice assigned to the switching subscriber is assigned. A method for transferring the call to a mailbox.

Nowadays, most companies and offices have private exchanges installed and operated. Examples of such private exchanges include 'Private Branch Exchanger (PABX)' and 'Keyphone System'. The role of the private exchange is largely a role of connecting a call between a trunk line and an extension subscriber by a telephone line (commonly referred to as a trunk line) of a premises switching facility and an affiliated transfer handling section.

On the other hand, in the private exchange as described above, a call transfer function is implemented. When the subscriber is absent or cannot receive a call when calling the extension subscriber, the subscriber switches the call to the extension or external trunk line designated by the extension subscriber in advance. It is a function that can be performed. In addition, in recent years, a private voice exchange (Voice Mail System; VMS) is often provided in a private exchange. In a private exchange equipped with the VMS, an extension subscriber can designate a call transfer to the VMS. If the designation is made, the call that has been received by the extension subscriber is connected to the VMS. At this time, the VMS sends a voice guide message to leave a voice message required by the caller, and receives and records a voice message in response thereto. As a result, the extension subscriber can later check the caller's In Message (ICM) stored in the VMS to know the call that has been received. In addition, the VMS has a plurality of voice message storage areas, so that various extension subscribers are assigned and used their own storage areas, and if a user enters through a predetermined password or a predetermined function, the voice message and You can save the recorded voice message.

However, in the related art, when an extension subscriber of a private exchange intends to transfer a call to an external caller, if the switching subscriber is absent, the subscriber switches to the VMS area of the switching subscriber to leave a voice message. At this time, there was a lot of inconvenience for the caller to leave a voice message. That is, since the caller does not know the number of the VMS area assigned to the switching subscriber and the password for entering the VMS, the caller needs the assistance of the extension subscriber to switch to the call to the VMS. That is, the extension subscriber once transfers a call to VMS, inputs the VMS area number and password of the switching subscriber who is absent according to the voice guidance message sent from the VMS, and then sends a message to leave a voice message from the VMS. At that moment, the phone was disconnected so that the caller and the VMS could connect.

As described above, in connecting a call to a caller in a conventional private exchange by a VMS, the caller may not be able to hear the voice announcement message transmitted from the VMS. Therefore, the caller does not know when to leave the voice message. Often there was no way to leave. In addition, an extension subscriber who switches a call must also continue to perform a call according to the operation of the VMS, resulting in a waste of time.

As described above, it is a main object of the present invention to solve a problem that occurs in connecting a call between a caller and a VMS in a conventional private exchange. That is, an object of the present invention is a method for transferring a call to a voice mailbox assigned to a switching subscriber when the switching subscriber is absent when an extension subscriber tries to transfer a call while the extension subscriber is in a busy state with an external caller. Is to implement

In order to achieve the object of the present invention, in a private exchange equipped with a voice mailbox, when the extension subscriber is in a call state with an external caller, a predetermined key and voicemail number and password of the switching side are transferred from the extension subscriber when necessary for a call transfer. If the input and off-hook, the input number and password is stored in the memory provided in the private exchange, the voicemail corresponding to the stored number is called and the voicemail ring tone is sent to the external caller; If the voice mailbox responds, the call transfer method comprises the step of transmitting a predetermined voice request voice guidance message to the external caller, and in response to storing the voice message sent from the external caller.

1 is a block diagram of a private exchange in which the present invention is carried out.

2 is a flowchart illustrating a method for transferring a call to a voicemail box according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

In the following description of the present invention, detailed descriptions of related well-known functions or configurations will be omitted when it is determined that the detailed description of the present invention may unnecessarily obscure the subject matter of the present invention. The terms to be described below are terms defined in consideration of functions in the present invention, and may be changed according to the intention or custom of the user or chip designer, and the definitions should be made based on the contents throughout the present specification.

First, FIG. 1 is a block diagram of a private exchange in which the present invention is performed, and shows that a voice mailbox is further added to a conventional private exchange.

Referring to FIG. 1, the CPU 100 processes a predetermined set of programs to control a call switch and to control various services and operations according to the present invention. The RAM 110 includes a program and a volatile data processing area, and is composed of a plurality of various buffers and used as a working memory of the CPU 100. The ROM 120 stores control programs and initial service data for performing calls and various functions. The switching circuit 130 switches various tone and voice data, connections between stations, and connections of trunk lines under the control of the CPU 100. The general subscriber circuit 140 performs interfacing between a general telephone and a device of a plurality of subscribers. The ring generator 150 outputs a ring signal in the form of a square wave to the general subscriber circuit 140. Key phone subscriber circuit 160 performs the interface between a plurality of key phone telephones and the device. At this time, the key phone includes a predetermined display unit so that the subscriber can know the overall operating state of the system and the input telephone number. The tone generator 170 achieves generation of blood or tones under the control of the CPU 100. The trunk line circuit 180 is connected to an external trunk line to implement a call between the external trunk line and the exchange. Caesar trunk line to form a trunk line loop. In addition, an incoming signal received through the trunk line is interfaced. The DTMF receiver 190 analyzes the DTMF signal generated from the subscriber of the general subscriber circuit 140. Meanwhile, the DTMF transmitter 200 outputs the DTMF signal to the switching circuit 130 under the control of the CPU 100. The clock circuit 105 serves as a timer for counting a predetermined time under the control of the CPU 100 or detects a current time. A voice mail box (VMS) 205 is connected to the switching circuit 130 to perform the operation of storing the voice message and transmitting the stored voice message under the control of the CPU 100. In addition, the VMS205 allocates a separate storage area for each subscriber, and performs voice message storage and transmission through a unique password for each subscriber. For reference, the voice message transmitted from the VMS is composed of a stored voice message and a pre-recorded voice guide message, and the voice guide message is called an OGM. The OGM refers to an 'Outing Going Massage' and serves to inform the VMS user of the use status. In addition, a plurality of the VMS205 is provided and accessible according to the capacity of the subscriber and the exchange, and when a plurality of VMS205 is provided, each VMS205 has a unique number for each VMS, which is called a VMS number. When the area allocated to each subscriber is divided into several mailboxes, this also has a unique number for each mailbox, which is called a mailbox number.

FIG. 2 is a flowchart illustrating a method of switching a call to a voicemail box according to the present invention, which is performed by the private exchange shown in FIG.

Referring to Fig. 2, an external caller calls a station subscriber of the private exchange. In general, the above-mentioned extension subscribers refer to a telephone number at a company or an exchange installed or refer to a subscriber having a representative telephone number, and may also be a general extension subscriber. Thus, in step 210, the caller is in a call state with the extension subscriber. At this time, if the caller wants to transfer the call to the extension subscriber that he / she wants to talk to, the extension subscriber checks the status of the switching subscriber and, if the call is available, connects the call immediately, and if the call is absent, In step 212, enter a Voice Mail Transfer (VMT) key. The VMT key is a function key provided separately at the extension terminal of the extension subscriber, and may be used by setting a function key provided previously. The VMT key is a function key used when the extension subscriber wants to transfer a call to a voice mailbox when the switching subscriber is absent and its function is described below. If it is determined in step 212 that the VMT key is input, the VMS and the extension subscriber is connected, and the VMS requests the extension subscriber to input the VMS number. That is, when the plurality of VMS is provided, the VMS corresponding to the switching subscriber is selected. If the number of VMS is provided, the VMS corresponding to the switching-side subscriber is selected, that is, when the VMS corresponding to the switching-side subscriber is selected. In step 214, it is determined whether the VMS number is input from the extension subscriber. If it is determined in step 214 that the VMS number is input, in step 216, the subscriber's mailbox number and password are input from the extension subscriber. In step 218, it is determined whether the extension subscriber is on-hook. This indicates that the extension subscriber has completed the operation of transferring the call to the VMS. If it is determined in step 218 that the extension subscriber is on-hook, in step 220, the numbers entered by the extension subscriber, that is, the VMS number, the mailbox number, and the password, are stored in the memory unit of the private exchange. In the case of the password, only the password may not be input. On the other hand, the mailbox number and password is performed only when the extension subscriber knows, and as described above, the extension subscriber is authorized to make a telephone exchange so as to know the above numbers for efficient work. Will be. The numbers input in step 220 are stored, and in step 222, the stored numbers are read and the VMS is called. In operation 224, the call sound generated in response to the call of the VMS is transmitted to the caller. Thus, the caller can hear the tone while waiting. In step 226, it is determined whether the VMS responds. The answer is determined according to whether the numbers entered by the extension subscribers are correct. This can be determined when entering a phone number. When the VMS responds in step 226, the voice announcement message OGM is transmitted to the caller in step 228. The OGM has a request to record the necessary voice message because the subscriber of the switching side is absent. In addition, the OGM may be a required voice message. Accordingly, the caller records a voice message of the necessary content according to the OGM of step 228. In step 230, it is determined whether the voice message recording is completed by the caller.

In the above description, the subscriber referred to as an extension subscriber has been described as a subscriber who performs a call counter or a telephone attendant function. In a situation where there is no telephone guide or telephone switch, it can be performed through other general extension subscribers. And although the caller may also be an external caller. You may be an extension subscriber.

As described above, the present invention, if the external caller wants to leave a voice message in the voice mail of the subscriber is absent, even if you do not know the mailbox number and password of the voice mailbox separately, you can leave a voice message There is this.

In addition, when the present invention is applied to the telephone guide, it is possible to solve the waste of time for the telephone guides who had to wait for the call while the call was transferred to the voice mailbox and connected, bringing the comfort of the voice message to the callers. give.

Claims (2)

In the method for transferring a call to the voice mailbox in a private exchange equipped with a voice mail, On-hook of the extension subscriber when there is a predetermined predetermined input according to a predetermined voicemail call from the extension subscriber as required for a call transfer in the call establishment state between the extension subscriber of the private exchange and the external caller of the extension subscriber. A first process of detecting whether A second step of storing an input from the extension subscriber into a memory provided when the on-hook is detected in the first step; A third process of calling the corresponding voicemail through reading of the stored input, and transmitting a call sound according to the call of the voicemail to the external caller according to the call processing; In the call processing of the voice mailbox, a fourth step of transmitting a pre-stored voice guidance message in the call-processed voice mailbox to the external caller; And a fifth process of processing a voice message transmitted from the external caller in response to the voice guide message as a voice message and storing the voice message in a corresponding area of the voice mailbox. The method of claim 1, wherein the input from the extension subscriber according to the voicemail call is A voicemail number for the selection of the voicemail to be transferred; A voicemail call transfer method of a private exchange comprising a mailbox number for selecting a storage area allocated to the extension subscriber in a voicemail to be transferred.

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