KR20070072734A - Private exchange control device providing voice mailbox service and method thereof - Google Patents

Abstract

The present invention relates to an apparatus for controlling a private exchange that provides a voice mail service and a method thereof. The present invention relates to a user information management module for managing information on a service mode of a subscriber station managed by a private exchange, and receiving a ring signal transmitted from an originating terminal. And a user interface module to search for a called terminal in the user information management unit to check a service mode of the called terminal, and if the service mode of the called terminal is a voice mailbox mode, a private exchange causes the calling terminal to call the calling terminal. By providing a private exchange control device including a voice mailbox management module for controlling to connect in the recording mode of the, it is possible to obtain the effect of connecting the caller to the recording mode of the receiver voice mailbox regardless of the line connection method.

Description

Apparatus and Method for Controlling PBX Supporting Voice Mailing System}

1 is a block diagram showing the configuration of a typical private exchange including a voice mailbox system.

2 is a flowchart illustrating a method of storing a voice message using a general private exchange.

3 is a flowchart illustrating a method of listening to a voice message using a general private exchange.

Figure 4 is a block diagram showing the configuration of a private switch network including a private switch control device according to an embodiment of the present invention.

Figure 5 is a block diagram showing the structure of a voice mailbox control unit for controlling a private exchange according to an embodiment of the present invention.

6 is a flowchart illustrating a method for connecting a voice mailbox using a private exchange control apparatus according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10: private exchange 20: internal subscriber terminal

30: external subscriber station 40: private exchange control device

41: voice mailbox control 42: user interface module

43: user information management module 44: voice mailbox management module

The present invention relates to a private exchange control device and a method for providing a voice mail service.

Private Branch eXchange (PBX) is a system used for on-premise communications, where all employees share a certain number of external telephone lines used primarily by the company and make calls between internal users connected to the extension. Refers to a telephone exchange system that connects automatically.

In addition, a private exchanger manages an area such as a company or a school as one region, provides services such as call transfer, call waiting, and three-way calling, and a telephone, a facsimile, a computer, and the like are connected to the private exchange.

In addition, the private exchange is connected to the trunk line switch and performs the same role as the terminal, and it is used internally as the exchange of the private exchange network, thereby eliminating the inconvenience and inconvenience of moving the facility such as line expansion.

Such a private exchange may provide voice mailbox functionality. In this case, the voice mail system (VMS) provides a service for a user to store a voice message or listen to a stored voice message through a telephone by using a voice digitization and transmission technology.

1 is a block diagram showing the configuration of a general private exchange including a voice mailbox system.

As shown in Fig. 1, the private switching network includes a private switch 10 and internal subscriber terminals 21 to 24 connected to a telephone line network. The private exchange 10 may include a call processing unit 11 for exchanging and managing internal and external calls and a voice mailbox processing unit 16 for providing a voice mailbox service. The voice mailbox processing unit 16 may exist independently of the private exchange 10. However, FIG. 1 illustrates a case where the voice mailbox processing unit 16 is included in the private exchange 10.

The call processing unit 11 of the private exchange 10 connects to the subscriber's terminal while simultaneously connecting to an analog trunk circuit 12, which is responsible for incoming detection and loop occupancy, and a voice mailbox system. Subscriber Line Circuit 13, which controls a related call, R2-MFC, which handles R2 signal and Dual Tone MultiFrequency (DTMF) signal processing, which is a kind of number exchange method for exchanging telephone numbers. A processing module (R2 Multi Frequency Module) 14, and a System Control Module 15 for controlling the private exchange.

In addition, the voice mailbox processing unit 16 is connected to the voice processing module (Voice Processing Module) 17, the private exchange 10, which is responsible for voice guidance and DTMF detection and transmission functions, and an analog interface to detect a ring and occupy a loop. Analog Trunk Circuit (18) which is responsible for the functions of the memory, the Memory Module (19) responsible for storing the recorded data and guidance to the caller to record when the voice mail service It may be configured as a main processing module (Main Processing Module) 20 for processing the call processing and data for.

2 is a flowchart illustrating a method of storing a voice message using a general private exchange.

When a caller makes a call to an internal subscriber through a public switched telephone network (PSTN) or a private switch 11, the analog trunk circuit of the call processing unit 10 detects a ring signal (S201). The detected ring signal is transmitted to the internal subscriber station 21 through the subscriber line circuit 13 of the private exchange 10 (S202).

The private exchange 10 checks whether the internal subscriber station 21 responds to the transmitted ring signal (S203). If there is a response to the ring transmitted from the internal subscriber, the private exchange 10 provides a voice call service (S204). When the voice call service is provided according to the process of S204, the private exchange 10 does not provide a separate voice mail service. When the voice call ends, the call connection between the terminals is terminated (S210).

If a response does not exist even after a predetermined time has elapsed from the called party in step S203, the system control module 15 of the private exchange 10 receives the analog trunk 18 of the voice mailbox processing unit 16 through the subscriber line circuit 13. In operation S205, a ring signal is transmitted. In addition, the system control module 15 transmits the telephone number of the internal subscriber terminal 21 serving as the called party to the main processing module 20 of the voice mailbox processing unit 16 through a communication port such as RS-232C (S206).

The analog trunk circuit 18 of the voice mailbox processor 16 detects a ring signal and transmits a guide message stored under the control of the main processing module 20 (S207). According to the transmitted voice announcement message, the sender transmits a predetermined DTMF (S208). When the caller records a voice message and inputs a predetermined DTMF signifying the end of the recording, the voice mailbox processing unit 20 stores the voice input by the caller in the memory module 19 (S209). After storing the voice message, the private exchange 10 terminates the call connection (S210).

3 is a flowchart illustrating a method of listening to a voice message using a general private exchange.

In order to listen to the message stored in the memory module 19 of the voice mailbox, the internal subscriber attempts to connect to the private exchange 10 (S301). When the internal subscriber makes a call to a predetermined telephone number to listen to a voice message, the analog trunk circuit 11 of the call processing unit 11 detects this (S302). The system control module 15 of the private exchange 10 transmits a ring signal to the analog trunk circuit 17 of the voice mailbox processing unit 16 (S303). In addition, the system control module 15 transmits the information of the internal subscriber who attempted to access the voice mailbox to the main processing module 20 of the voice mailbox processing unit 16 (S304).

The voice mailbox processing unit 16 transmits the voice guidance message according to the listening mode to the internal subscriber station 21 (S305). If the internal subscriber station 21 selects to listen to the voice message with a predetermined DTMF tone (S306), the main processing module 20 of the voice mailbox processing unit 20 transmits the voice message stored in step S209 to the internal subscriber station. (S307). In this way, the internal subscriber station 21 can check the stored voice message.

Such voice mailbox service is recently provided by a private exchange control device equipped with a program for controlling call processing and voice mailbox. In this case, when the caller requests a voice mail connection using a trunk line, the caller is connected to the voice mail recording mode as the user intends. When such a connection is made, the caller may store the voice message according to the process of FIG. 2. However, if the caller requests to connect to the voice mailbox by extension, the caller is connected to the listening mode of the called party's voice mailbox. Therefore, there is an inconvenience that the caller can not leave a voice message to the called party, there is also a security related problem because the caller can listen to the recorded voice message to the called party.

Accordingly, an object of the present invention is to solve the above problem according to the prior art, and when a ring signal is transmitted to an internal subscriber corresponding to a voice mailbox mode, a private exchange causes the private exchange to send a caller to the recording mode of the called party voice mailbox. The present invention provides a private exchange controller and a method for controlling the connection.

The private exchange control apparatus for providing a voice mail service according to an aspect of the present invention is a user information management module for managing information on a service mode of a subscriber station managed by the private exchange, a user receiving a ring signal transmitted from an originating terminal. The service module of the called terminal is checked by searching for an interface module and a called terminal of the ring signal in the user information management module, and if the service mode of the called terminal is a voice mailbox mode, the private exchange causes the calling terminal to make the calling terminal. It includes a voice mailbox management module for connecting to the recording mode of the called terminal voice mailbox.

The user information management module may include a user information database that stores information about the name of the subscriber, the telephone number of the subscriber, the service mode of the subscriber, and updates the information when the information is changed. In this case, the voice mailbox management module searches for a subscriber's telephone number that matches the telephone number of the called terminal included in the ring signal, and checks the service mode of the corresponding subscriber.

In addition, the voice mailbox management module transmits an outgoing command with a predetermined option key inserted to the private exchange, and the private exchange detects the outgoing terminal as an option key in the received outgoing command. It is characterized by connecting.

According to another aspect of the present invention, there is provided a method for controlling a private exchange, the method comprising: storing information on a service mode of a subscriber station managed by the private exchange in a subscriber information database, receiving a ring signal transmitted from an originating terminal, and receiving the ring. Checking the service mode of the called terminal by searching for a called terminal of a signal in the subscriber information database; and if the service mode of the ring signal called terminal is a voice mailbox mode, the private exchange causes the calling terminal to receive the calling terminal. And controlling to connect to the recording mode of the terminal voice mailbox.

The private switch control method according to the present invention further includes storing information on the subscriber's name, the subscriber's telephone number, and the subscriber's service mode in the subscriber information database, and updating the information when the information is changed. In this case, the checking of the service mode of the called terminal may include retrieving the subscriber's telephone number that matches the telephone number of the called terminal included in the ring signal, and checking the service mode of the corresponding subscriber. .

The controlling of the private exchange to connect the calling terminal to the recording menu of the called terminal voice mailbox may include transmitting a calling command with a predetermined option key to the private exchange and the receiving call received by the private exchange. And connecting the calling terminal to the recording mode of the called terminal voice mailbox when the option key is detected by the command.

More preferably, the method for controlling a private exchange according to the present invention may further include relaying the ring signal to a public switched network when the terminal of the ring signal is not a terminal managed by the private exchange.

Hereinafter, a private exchange control apparatus and a method for providing a voice mail service according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 is a block diagram showing the configuration of a private switching network including a private switch control device according to an embodiment of the present invention.

The private exchange control device 40 of FIG. 4 includes a voice mailbox controller 41. The voice mailbox controller 41 may be implemented using software. The private exchange control device 40 may also use a software to perform call control functions such as making, receiving, hanging, holding, switching, and the like.

The voice mailbox control unit 41 controls the voice mailbox processing unit 16 of the private exchange 10 so that a caller who makes a call to a user who is set to the voice mailbox mode is placed in the recording mode of the voice mailbox regardless of the call type such as a trunk line or an extension. To be connected.

Internal subscriber A (21) belonging to the private switching network is a subscriber set to be called by a voice mailbox. The call state of this internal subscriber A 21 is called a voice mailbox mode. On the contrary, when a call is received, the subscriber who has set up the voice call is in the voice call mode.

When the internal subscriber B 22 calls the internal subscriber A 21, the private exchange 10 uses the DTMF to send the telephone number of the internal subscriber A, the called party, to the voice mailbox control unit 41 in the private exchange controller 40. To send). Of course, the private exchange 10 also transmits the ring signal transmitted from the subscriber B to the subscriber A to the voice mailbox controller 41. The voice mailbox controller 41 detects a ring signal of the internal subscriber B. In this case, the voice mailbox controller 41 can know the information of the internal subscriber A that is the called party. The called party information includes the telephone number of the called terminal, personal information, and the like.

The voice mailbox controller 41 checks whether the called terminal is a terminal in a private switching network. In addition, the voice mailbox controller 41 checks whether the called terminal is in the voice call mode or the voice mailbox mode. When the called terminal belongs to the private switching network, and the called terminal is in the voice mailbox mode, the voice mailbox controlling unit 41 attaches a predetermined option key and transmits a call command to the private switching center 10.

On the other hand, the private exchange 10 receiving the originating command from the voice mailbox controller 41 checks a predetermined option key and connects the internal subscriber B, which is the caller, to the voice mailbox recording mode of the internal subscriber A.

This operation is the same when a call is received from an external user. That is, when the called party sets the call state to the voice mailbox mode, the private exchange 10 connects all callers to the recording mode of the voice mailbox, regardless of whether a call comes from an extension subscriber or a call from an external user.

5 is a block diagram illustrating a structure of a voice mailbox controller for controlling a private exchange according to an embodiment of the present invention.

As illustrated in FIG. 5, the voice mailbox controller 41 may include a user information management module 43, a user interface module 42, and a voice mailbox sending module 45.

The user interface module 42 plays a role similar to an analog trunk and corresponds to a component that detects a user's transmission attempt through a ring signal transmitted through the private exchange 10.

The user information management module 43 functions to manage contacts, etc. according to call states and service modes of subscribers in the private switching network.

The user information manager 43 may include a user information database 44 including information such as a subscriber's name, service mode, connection number, and the like. Of course, the user information management database 44 may be stored in a storage device, such as a separate memory or a hard disk, inside the private exchange control device 40 instead of the voice mailbox controller 41. 4 illustrates a case where the user information database 44 is included in the user information management module 43. The following is an example of a database that stores user information.

No Subscriber's Name Subscriber connection number Subscriber service mode One A 100 Voice mailbox mode 2 B 200 Call mode 3 C 300 Call mode 4 D 400 Voice mailbox mode

The service mode is a mode of whether a subscriber makes a voice call with a caller or guides a caller to a voice mail box when a call comes to a private switching network subscriber. As shown in Table 1, subscriber A is in the voice mailbox mode, so when a call is received from the caller, the caller is directed to the voice mailbox. In contrast, since the subscriber B is in a call mode, when the caller calls the subscriber B, a ring signal is transmitted to the terminal of the subscriber B and a voice call can be made.

The call state may be set or changed by the subscriber using the terminal, and when the internal subscriber changes the state, the user management storage module 43 updates the database 44.

The voice mailbox management module 45 extracts the telephone number of the called terminal from the ring signal attempted to send. The telephone number of the called terminal and the subscriber telephone number of the user information database 44 are compared, and the corresponding service mode is checked. When the destination terminal is in the voice mailbox mode as a result of the comparison, the voice mailbox management module 45 transmits an origination command including an option key for connecting the caller to the recording mode of the voice mailbox to the private exchange 10. In Table 1, if the called party corresponds to internal subscriber A, the voice mailbox management module 45 transmits to the private exchange 10 by adding an option key to the calling command to connect the caller to the recording mode of the voice mailbox. will be. Upon receiving the originating command, the private exchange 10 connects the internal subscriber B to the voice mailbox recording mode of the internal subscriber A.

If the caller is an internal subscriber who manages the voice mailbox, the voice mail manager may be connected in the listening mode by sending a call command not including the option key to the private exchange 10.

6 is a flowchart illustrating a method for connecting a voice mailbox using a private exchange control apparatus according to an embodiment of the present invention.

When the caller makes a call, the voice mailbox control device detects a ring signal transmitted from the caller (S601). The voice mailbox control device extracts the called party's telephone number from the detected ring signal (S602). The voice mailbox control apparatus checks whether the called party's telephone number is the telephone number of the terminal belonging to the private switching network (S603). In addition, the voice mailbox control apparatus checks the current service mode of the called party, and checks whether the called party is set to the voice mailbox mode (S604). This service mode check process can be performed using the database described in Table 1. If the called party's telephone number is that of the terminal belonging to the private switching network, and the called party sets the service mode to voice mailbox mode, the voice mailbox controller inserts a voice mail function setting option key and sends a command to the private exchange. Send (S605). The private exchange receiving the originating command controls the caller to connect to the called party's voice mailbox recording mode (S606).

If the called party is in the voice call mode instead of the voice mailbox mode in step S604, the private exchange attempts to connect the call between the caller and the called party to provide a voice call service (S607). In addition, when the called party is not a subscriber belonging to the private switching network in step S603, the private exchange relays the ring signal to the public switching network (S608).

The preferred embodiment of the present invention has been described above. The present invention is not limited to the above-described embodiment, and various modifications can be made by anyone having ordinary skill in the art to which the present invention pertains.

According to the voice mailbox system and the method for automatically entering the recording mode according to the present invention as described above, if the subscriber is set to leave a message in the voice mailbox, regardless of the CO line user or extension user to the recording mode of the voice mailbox Has the effect of being connected.

Claims (9)

In the private exchange control device for providing a voice mailbox service, A user information management module managing information on a service mode of a subscriber station managed by the private exchange; A user interface module for receiving a ring signal transmitted from an originating terminal; And The service information of the called terminal is checked by searching for the called terminal of the ring signal in the user information management module, and if the service mode of the called terminal is a voice mailbox mode, the private exchange causes the calling terminal to call the called terminal. A private exchange control device that includes a voice mailbox management module that allows a voice mailbox to connect in recording mode. The method of claim 1, The user information management module, And a user information database which stores information on the subscriber's name, the subscriber's telephone number, and the subscriber's service mode and updates the information when the information is changed. The method of claim 2, The voice mailbox management module, And a subscriber telephone number matching the telephone number of the called terminal included in the ring signal and checking the service mode of the subscriber. The method of claim 1, The voice mailbox management module transmits an origination command with a predetermined option key to the private exchange, and the private exchange connects the originating terminal to the recording mode of the called terminal voice mailbox when the private exchange detects the option key. Private exchange controller with a feature. In the private exchange control method, Storing information on a service mode of a subscriber station managed by the private exchange in a subscriber information database; Receiving a ring signal transmitted from an originating terminal; Checking a service mode of the called terminal by searching for the called terminal of the ring signal in the subscriber information database; And And controlling the private exchange to connect the calling terminal to the recording mode of the called terminal voice mailbox when the service mode of the ring signaling terminal is the voice mailbox mode. The method of claim 5, And storing information on the subscriber's name, the subscriber's telephone number, and the subscriber's service mode in the subscriber information database, and updating the information when the information is changed. The method of claim 6, Checking the service mode of the called terminal, And searching the subscriber's telephone number matching the telephone number of the called terminal included in the ring signal, and checking the service mode of the subscriber. The method of claim 5, The step of controlling the private exchange to connect the calling terminal to the recording menu of the called terminal voice mailbox, Transmitting to the private exchange a send command with a predetermined option key inserted therein; Wow And when the private exchange detects the option key in the received originating command, connecting the originating terminal to the recording mode of the called terminal voice mailbox. The method of claim 5, Relaying the ring signal to a public switched network if the destination terminal of the ring signal is not a terminal managed by the private exchange.

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