JP2007166089A - Private branch exchange system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a private branch exchange system which prepares a virtual button which is a virtual number of a DI (Direct Inward Dialling) and a monitor button corresponding to the virtual number, and can simultaneously perform voice monitoring of a plurality of lines from an extension terminal. <P>SOLUTION: The system comprises a main control device 4, which makes terminating calls which are terminated to office line circuits PRIa to PRIj show terminating indication on virtual buttons of a plurality number of conversation board 6a to 6n, and notifies them, if the virtual button of terminating call indication is pressed, the device makes the conversation board 6a pressing the virtual button answer the terminating call, and become speech condition, if a virtual button and a monitor button of a conversation board 6n except the conversation condition is pressed, the device makes a speech path Pb between the office line circuit PRIa in the speech condition and a line circuit for monitoring LINa corresponding to a pressed monitor button through a speech path switch 3, and performs execution control of voice monitoring of the speech. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a private branch exchange system such as a dealing system, and in particular, a private branch exchange system capable of operating a virtual button and a monitor button mounted on an extension terminal and monitoring the voice of the extension terminal during a call from another extension terminal. About.

  Conventionally, a private branch exchange system capable of voice monitoring of a line during a call can make a call to a public line or a private line accommodated in a line switch of an extension terminal such as a multi-function telephone or a telephone stand accommodated in a private branch exchange. When middle monitoring is performed, the voice monitor can be listened to by pressing the line button from another extension terminal displayed on the line button during a call.

In addition, as disclosed in “Patent Document 1”, a conventional voice monitor device is an exchange that is processed by a PCM method, and automatically transmits a voice transmitted by a special code method having a compressed special voice code code. That can be selected and PCM-encoded for audio monitoring.
JP-A-8-317055

  In a conventional private branch exchange system, an extension terminal for voice monitoring usually does not have a monitoring terminal for monitoring a plurality of lines by one extension terminal, so when a plurality of lines are simultaneously monitored from one extension terminal. In this case, terminals for a plurality of lines are installed, and voice monitoring is performed from each terminal.

  However, in such a case, a space for placing the terminal is required, and there is a problem that increases the hardware cost of the terminal.

  In addition, when the number of lines subject to voice monitoring increases, the extension terminal must accommodate a line key for each channel of the line, and the number of line keys increases, and the number of lines subject to voice monitoring increases. There is a problem that it is difficult to identify and the operability of the line key is also poor.

  The present invention has been made to solve such a problem, and the object thereof is to provide a virtual button in which a DI (dial-in) number is converted into a virtual number and a monitor button corresponding to the virtual number, and a plurality of terminals from one extension terminal. An object of the present invention is to provide a private branch exchange system capable of simultaneously monitoring a line voice.

  In order to solve the above problems, a private branch exchange system according to the present invention includes a plurality of extension terminals having a virtual button for executing virtual number reception and virtual number transmission, a monitor button for monitoring voice during a call, and an extension. An extension trunk and a plurality of monitor trunks connected to each of the terminals, a station trunk that accommodates office lines from the public network, a speech path switch that forms a speech path, a main control device that controls the operation of the entire private branch exchange, A private branch exchange system comprising a private branch exchange having a storage device for storing processing procedures, data tables, etc., wherein the main control unit displays incoming calls received on the local trunk on the virtual buttons of a plurality of extension terminals When the virtual button on the incoming call display is pressed, the extension terminal on which the virtual button is pressed is made to respond to the incoming call and is placed in a call state. By pressing the virtual button and the monitor button of the terminal, a call path is formed between the local trunk in the call state and the monitor trunk corresponding to the pressed monitor button via the call path switch, The voice monitor is controlled to be executed.

  The main controller of the private branch exchange system according to the present invention notifies the incoming call that has arrived at the local trunk by displaying the incoming call on the virtual buttons of a plurality of extension terminals, and pressing the virtual button on the incoming call display, An extension terminal whose virtual button is pressed is made to respond to an incoming call and is placed in a call state. When a virtual button and a monitor button of an extension terminal other than the call state are pressed, a local trunk in a call state via a call path switch And a monitoring trunk corresponding to the pressed monitor button is formed, and the voice monitoring of the call is executed and controlled. A call path can be formed between each of the monitoring trunks and a plurality of voices during a call can be monitored from one extension terminal.

  The storage means according to the present invention includes a virtual button configuration data area for storing a plurality of virtual number data and office line accommodation position data corresponding to the virtual number data.

  The storage means according to the present invention includes a plurality of virtual number data and station line accommodation position data corresponding to the virtual number data, so that a large number of virtual buttons corresponding to the number of channels on the station line are not provided. In addition, it is possible to realize office line reception and office line transmission with few virtual buttons.

  The storage means according to the present invention further comprises a monitor registration data area for storing extension terminal accommodation position data, monitor number data, monitor trunk accommodation position data, and office line accommodation position data. .

  The storage means according to the present invention includes a monitor registration data area for storing extension terminal accommodation position data, monitor number data, monitor trunk accommodation position data, and office line accommodation position data. The monitor trunk accommodation position to which the extension terminal to be connected is connected and the office line accommodation position during a call can be specified, and the corresponding monitor trunk and office trunk can be connected by a call path.

  The main controller of the private branch exchange system according to the present invention notifies the incoming call that has arrived at the local trunk by displaying the incoming call on the virtual buttons of a plurality of extension terminals, and pressing the virtual button on the incoming call display, An extension terminal whose virtual button is pressed is made to respond to an incoming call and is placed in a call state. When a virtual button and a monitor button of an extension terminal other than the call state are pressed, a local trunk in a call state via a call path switch And a monitoring trunk corresponding to the pressed monitor button is formed, and the voice monitoring of the call is executed and controlled. A system having an extension terminal that is easy to use and has high convenience by allowing a call path to be formed between each monitor trunk and monitoring a plurality of voices during a call from one extension terminal. It can be constructed.

  Further, the storage means according to the present invention includes a virtual button configuration data area for storing a plurality of virtual number data and station line accommodation position data corresponding to the virtual number data. Thus, it is possible to realize local line incoming and outgoing line transmission with a small number of virtual buttons without providing virtual buttons, and to provide an easy-to-use extension terminal.

  Further, since the storage means according to the present invention includes a monitor registration data area for storing extension terminal accommodation position data, monitor number data, monitor trunk accommodation position data, and office line accommodation position data, It is possible to identify the monitor trunk accommodation position to which the extension terminal to monitor the terminal is connected and the office line accommodation position during the call, and connect the corresponding monitor trunk and the office trunk via the call path. The voice of the call can be easily monitored from the extension terminal without requiring hardware.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a system configuration diagram of an embodiment of a private branch exchange system according to the present invention. The private branch exchange system is applied to a dealing system and the like, and an extension terminal is represented by a telephone stand, a station trunk is represented by a station circuit, an extension trunk is represented by a talk table line circuit, and a monitor trunk is represented by a monitor line circuit.

  In FIG. 1, a private branch exchange system 1 is installed in a private branch exchange 2, a dealing room, and the like, and includes a virtual button for executing virtual number reception and virtual number transmission, and a monitor button for monitoring voice during a call. The communication bases 6a to 6n and the public network 7 are provided. The private branch exchange 2 includes a communication path switch 3 that forms a call path, a main control device 4 that controls the operation of the entire private branch exchange 2, a storage device 5 that stores processing procedures, data tables, and the like, and call stands 6a to 6n. Are provided with telephone line circuits DBLa to DBLn, voice monitor line circuits LINa to LINk accommodated in the telephone board 6n, and station line circuits PRIa to PRIj that accommodate office lines from the public network 7. Note that the monitor line circuits LINa to LINk may be accommodated in the talking units 6b to 6n, respectively.

  The speech path switch 3, the main control device 4 and the storage device 5 are connected via a control bus BU, and the speech base line circuits DBLa to DBLn and the local line circuits PRIa to PRIj are connected to the control bus BU via the control line LC. It is connected. Note that each device in the private branch exchange 2 is operated under the control of the main control device 4 by exchanging various control data via the control line LC and the control bus BU.

  Further, the state of the speech path switch 3 in FIG. 1 is that there is a dial-in incoming call from the public network 7 to the office line circuit PRIa, and the telephone board 6a responds to the incoming call between the office line circuit PRIa and the telephone board line circuit DBLa. A call path Pa is formed, and a call path Pb is formed between the monitor line circuit LINa and the station line circuit PRIa while the station 6a is talking to the station line call from the station line circuit PRIa. Represents the case where the voice monitor of the call is being executed.

  Main controller 4 is basically composed of a microprocessor, and displays incoming calls received on station line circuits PRIa to PRIj by displaying them on the virtual buttons of a plurality of talking boards 6a to 6n, and displays the incoming virtual buttons. Is pressed, the telephone board 6a in which the virtual button is pressed is made to respond to an incoming call, and the telephone call state switch is made by pressing the virtual button and the monitor button of the telephone board 6n other than the telephone call state. 3, a call path Pb is formed between the station line circuit PRIa in a call state and the monitor line circuit LINa corresponding to the pressed monitor button, and execution control of voice monitoring of the call is performed.

  As a result, the main control device 4 forms a call path Pb between the plurality of office line circuits PRIa to PRIj during a call and the plurality of monitor line circuits LINa to LINk on the voice monitor side. It is possible to monitor a plurality of voices during a call from the call stand.

  Further, the main control device 4 instructs the call boards 6a to 6n to display virtual buttons, calls during calls, call monitors, and the like, and controls all the call boards 6a to 6n to display colors corresponding to the states. .

  The storage device 5 is configured by a flash memory or the like, and includes a virtual button configuration data area for storing a plurality of virtual number data and station line (station line circuits PRIa to PRIj) accommodation position data corresponding to the virtual number data.

  The storage device 5 stores extension terminal (talking stations 6a to 6n) accommodation position data, monitor number data, monitoring trunk accommodation position data, and office line (station line circuits PRIa to PRIj) accommodation position data. A monitor registration data area is provided.

  FIG. 2 is a virtual button configuration data area image diagram of one embodiment of the storage device according to the present invention. In FIG. 2, the virtual button configuration data area 5a includes station line accommodation position data of the station line circuits PRIa to PRIj corresponding to the virtual number 1 to virtual number n data.

  Virtual number 1 to virtual number n are data assigned to the virtual buttons that are commonly accommodated in all of the talking units 6a to 6n, and are used for virtual button reception and virtual button transmission. Note that virtual numbers 1 to n are registered in advance in the virtual button configuration data area 5a.

  The station line accommodation position is set in association with virtual numbers 1 to n when a virtual button is received or a virtual button is transmitted. For example, if a DI (dial-in) call is received in each of the station line circuits PRIa to PRIj, the DI number and the virtual number are associated in advance, so any one of the station line circuits PRIa to PRIj that received the DI call The accommodation position is set in the same area as the virtual number (corresponding to the DI number) of the virtual button configuration data area 5a.

  Since the DI (dial-in) number can reduce the number of line channels like a representative number by contracting with a telephone company, a number of line buttons that are originally required for the talking units 6a to 6n are assigned to DI ( Dial-in) It can be configured with a small number of virtual buttons to which virtual numbers associated with numbers are assigned.

  The virtual button configuration data area 5a is data that is identified when a virtual number is designated to perform voice monitoring during a call.

  As described above, the storage means 5 according to the present invention includes the virtual button configuration data area 5a for storing a plurality of virtual number data and station line accommodation position data corresponding to the virtual number data. Without providing many virtual buttons corresponding to the above, it is possible to realize local line incoming calls and local line outgoing calls with few virtual buttons, and to provide easy-to-use extension terminals (call bases 6a to 6n).

  FIG. 3 is an image diagram of a monitor registration data area as an embodiment of the storage device according to the present invention. In FIG. 3, the monitor registration data area 5b is provided for each of the talking stations 6a to 6n, and is used as an extension terminal (calling station) accommodation position data indicating the accommodation position of the talking boards 6a to 6n, and as a monitor button for voice monitoring. Corresponding monitor number (channel) data, pre-registered monitor trunk (line) accommodation position data indicating the accommodation positions of the monitor line circuits LINa to LINk, and a station indicating the accommodation positions of the office line circuits PRIa to PRIj during a call Line accommodation position data is provided.

  The monitor registration data area 5b is a monitor target based on the accommodation positions of the monitor line circuits LINa to LINk registered in advance based on the accommodation position information data of the talking stations 6a to 6n and the monitor number data corresponding to the monitor buttons. The accommodation positions of the office line circuits PRIa to PRIj are stored.

  When voice monitoring is performed on a line during a call, by pressing a virtual button that displays a call on a call stand (for example, a call stand 6n), which will be described later, and monitor buttons associated with the monitor line circuits LINa to LINk, Extension terminal accommodation position data, monitor number data, and monitoring trunk accommodation position data in the monitor registration data area 5b are determined, and the office line accommodation position during a call is set from the virtual button configuration data area 5a shown in FIG.

  For example, the monitoring trunk accommodation position data (for example, the monitor line circuit LINa) and the local line accommodation position (for example, the local line circuit PRIa) stored in the monitor registration data area 5b are subject to voice monitoring of the call, and are controlled by the main control. Under the control of the device 4, the monitor line circuit LINa and the office line circuit PRIa are connected via the call path switch 3 via the speech path switch 3, and the telephone line 6n is connected to the station line circuit PRIa via the monitor line circuit LINa. Can be used for voice monitoring.

  Thus, the storage means 5 according to the present invention includes the monitor registration data area 5b for storing the extension terminal accommodation position data, the monitor number data, the monitor trunk accommodation position data, and the office line accommodation position data. Identifying the accommodation position of the monitoring trunk (monitoring line circuit LINa) to which the extension terminal (for example, the talking stand 6n) for monitoring the voice of the call is connected and the office line accommodation position (station line circuit PRIa) during the call The corresponding monitor trunk (monitor line circuit LINa) and the office line trunk (office line circuit PRIa) can be connected by the call path Pb, and no complicated software and hardware are required, and the call stations 6a to 6n. Can easily monitor the voice of the call.

  FIG. 4 is a panel view of an embodiment of a telephone stand according to the present invention. In FIG. 4, each of the talking boards 6a to 6n includes a virtual button 1 to a virtual button 10 with a display and a monitor button 1 to a monitor button 5, and when there is an incoming virtual button (for example, virtual button 1), All virtual buttons 1 of 6a to 6n are displayed as incoming calls (for example, blinking red).

  When the virtual button 1 is pressed and the talking board 6a responds, the virtual button 1 of the talking board 6a is displayed during a call (for example, lit in green), and a local trunk (for example, a local line) that has an incoming call with the talking board 6a. The circuit PRIa) is connected by the call path Pa shown in FIG.

  When the virtual button 1 of the talking board 6a is in a busy display (for example, green lighting), the virtual buttons 1 of the talking boards 6b to 6n are also in a busy display (for example, red lighting).

  When the talking board 6n presses the virtual button 1 and the monitor button 1 to monitor the voice of the call from this call state, the call display (for example, red lighting) of the virtual button 1 becomes the monitor display (for example, blue lighting). The monitor button is displayed on the monitor (for example, lit in green), and the office line trunk (for example, the office line circuit PRIa) and the monitor line circuit LINa are connected by the communication path Pb shown in FIG. It is possible to monitor the voice of the telephone line PRIa from 6n.

  Next, a description will be given of an operation flow of a virtual button incoming call for a local line, an incoming call response using a virtual button, and a voice monitor for a call using a virtual button and a monitor button. The operation flow is that the local line is received by the local line circuit PRIa, the call stand 6a responds to the call via the call stand line circuit DBLa, and a call state is established. This call is sent to the call stand 6n via the monitor line circuit LINa. A case of performing voice monitoring will be described.

  FIG. 5 is an operation flow chart of the virtual button incoming call in one embodiment of the private branch exchange according to the present invention. In FIG. 5, when there is a DI (dial-in) incoming from the public network 7, the station line circuit PRIa detects the incoming call (step S 10), and receives a dial from the public network 7 according to a command from the main controller 4. Preparation is performed (step S11).

  Subsequently, the office line circuit PRIa receives a dial-in number, for example, “2000”, sent from the public network 7 (step S12).

  In order to identify whether or not the main control device 4 can receive the call “2000” dialed from the public network 7, the data in the virtual button configuration data area 5a shown in FIG. Search for. First, the dial reception number “2000” is extracted, the data of virtual number 1 is extracted from the head address of the virtual button configuration data area 5a, and compared with the dial reception number “2000” (steps S13 and S14).

  It is determined whether or not the dial reception number “2000” matches the virtual number registered in virtual number 1 (step S15). If they do not match, virtual number 2 to virtual number in virtual button configuration data area 5a are determined. The number n is searched (steps S16 and S17). If the number n is exceeded, the search is terminated.

  If they match in step S15, the station line accommodation position set next to the matching virtual number “2000” is extracted from the virtual button configuration data area 5a shown in FIG. 2 (step S20). The extracted station line accommodation position is data for identifying whether the virtual number “2000” is already used or vacant. For example, when the data is 0, it is determined to be empty, and when the data is other than 0, it is determined to be used (Step S21).

  If the data of the station line accommodation position is in use, the process jumps to the restriction sound listening process. If the data is not available, the process for displaying the incoming call on the virtual button 1 with the incoming call number “2000” (step S22). )I do. For example, the blinking display (for example, red blinking) control of the virtual buttons 1 of the communication terminals 6a to 6n shown in FIG. 4 is performed, and the station that is the next data of the virtual number that coincides in the virtual button configuration data area 5a shown in FIG. The accommodation position of the station line circuit PRIa is set to the location of the line accommodation position. The subsequent operation flow will be described on the assumption that the virtual number in the virtual button configuration data area 5a matches the dial reception number “2000”.

  FIG. 6 is an operation flow diagram of a telephone conversation according to an embodiment of the private branch exchange according to the present invention. In FIG. 6, when the virtual button 1 of the talking stand 6a displaying the incoming call is pressed, the number “2000” of the pressed virtual button 1 is searched and obtained by a command from the main control device 4 (step S23) It is again determined whether or not the virtual number 1 of the virtual button configuration data area 5a shown in FIG. 2 matches (step S24). If the numbers match, the state number is extracted from the station line accommodation position set next to the virtual number 1 (step S25).

  Next, based on the state number, it is determined whether or not a call is being received (step S26). If a call is being received, a process for displaying the virtual button 1 during a call is performed. For example, lighting control (for example, green lighting) of the virtual button 1 of the talking board 6a shown in FIG. 4 is performed (step S27).

  Subsequently, a call path Pa connection process is performed for the office line (office line circuit PRIa) and the one-speaker line circuit DBLa (step S28).

  Next, the case where the telephone stand 6n performs voice monitoring from the above-described call state will be described. FIG. 7 is a voice monitoring operation flowchart for a telephone conversation according to an embodiment of the present invention. In FIG. 7, in the case of voice monitoring, when the monitor button (for example, monitor button 1) of the talking stand 6n shown in FIG. According to the command, from the monitor registration data area 5b shown in FIG. 3, when indexed by the accommodation position of the talking stand 6n where the virtual button 1 is pressed and the channel number of the monitor button 1, the accommodation position of the monitor line circuit LINa is obtained.

  As a result, if the monitor line circuit LINa is mounted, the storage position data of the monitor line circuit registered in advance is described. If the monitor line circuit LINa is stored but not mounted, the storage position data is For example, 0. In this embodiment, it is assumed that a monitor line circuit is mounted.

  The office line accommodation position which is the next data in which the accommodation position of the monitor line circuit is stored is obtained (step S30). Subsequently, the presence / absence of a monitor is determined (step S31).

  If the station line accommodation position data is other than 0, for example, it is determined that monitoring is in progress, and monitor release processing is performed. If it is 0, it is determined that there is no monitoring, and based on the number of the pressed virtual button 1, A search process is performed from the virtual number 1 in the virtual button configuration data area 5a shown in FIG. 5B, and the state number is obtained from the station line accommodation position set next to the virtual number 1 that matches (step S32).

  In the above process, since the status number is during the virtual button call, the next process of the voice monitor registration process (step S34) is performed, so the location of the station line accommodation position in the monitor registration data area 5b shown in FIG. The accommodation position of the station line circuit PRIa is set in

  If the voice monitor call path Pb is connected between the accommodation position of the monitor line circuit LINa and the station line circuit PRIa (step S35), the voice sent from the public network 9 is transmitted to the station line as shown in FIG. Voice monitoring can be performed between the circuits PRIa to PRIj and the monitor line circuits LINa to LINk via the call path Pb.

  Since the monitor line circuits LINa to LINk can accommodate a plurality of channels for each of the talking units 6a to 6n, the monitor line circuits LINa to LINk can be connected to a speaker or the like whose volume can be adjusted for each of the monitor line circuits LINa to LINk. Is possible.

  Even if an INS line such as a primary group interface is accommodated, a voice monitor channel is not designated for each circuit button, and a voice monitor channel is designated for a virtual number button. Is not required to be accommodated in the telephone stand, operability is facilitated, and flexible response is possible.

  Next, state transition of the private branch exchange will be described. FIG. 8 is an operation transition state diagram of one embodiment of the private branch exchange according to the present invention. In FIG. 8, <state-1> represents a state where the station line circuit PRIa detects an incoming call from the public network 7.

  <State-2> represents a receiving state of a DI (dial-in) number detected by the office line circuit PRIa.

  <State-3> represents the incoming state of a virtual number (virtual button) that matches the DI (dial-in) number, and buttons for all virtual numbers (for example, virtual number 1) of the talking units 6a to 6n are displayed. Display blinking.

  In <State-4>, the telephone board 6a responds to the incoming call, the virtual button 1 is lit, and a telephone call path Pa is formed between the office line circuit PRIa and the telephone board line circuit DBLa. Indicates that a call state is established with an incoming call.

  In <state-5>, the talking board 6n performs voice monitoring of the telephone call, and a telephone call path Pb is formed between the telephone board line circuit DBLa and the monitoring line circuit LINa. Represents a state.

  As described above, main controller 4 of private branch exchange system 1 according to the present invention receives an incoming call that has arrived at a trunk line (station line circuits PRIa to PRIj) of a plurality of extension terminals (talking stations 6a to 6n). An incoming call is displayed on the virtual button for notification, and when the virtual button on which the incoming call is displayed is pressed, the extension terminal (for example, the telephone stand 6a) on which the virtual button is pressed is made to respond to the incoming call and is put into a call state. When the virtual button and the monitor button of the extension terminal other than the state (for example, the telephone stand 6n) are pressed, the station line trunk (station line circuit PRIa) in the communication state and the monitor button pressed are pressed via the communication path switch 3. Since a call path Pb is formed with a monitoring trunk (monitoring line circuit LINa) corresponding to, and the voice monitoring of the call is executed and controlled, the side that performs voice monitoring with a plurality of trunk trunks during the call A call path is formed between each of a plurality of voice monitoring trunks, and a plurality of voices during a call can be monitored from one extension terminal, and a user-friendly and highly convenient extension terminal system is constructed. be able to.

  The private branch exchange system according to the present invention is provided with a virtual button obtained by converting a DI (dial-in) number into a virtual number and a monitor button corresponding to the virtual number, and can monitor a plurality of lines from a single extension terminal. The present invention can be applied to any private branch exchange system such as a dealing system that monitors voice of a plurality of lines from an extension terminal.

System configuration diagram of an embodiment of a private branch exchange system according to the present invention Embodiment of a storage device according to the present invention Virtual button configuration data area image diagram One embodiment of a storage device according to the present invention Monitor registration data area image diagram Panel view of one embodiment of a telephone stand according to the present invention One Embodiment of Private Branch Exchange according to the Present Invention Operation flow diagram of incoming virtual button Operation flow diagram of one embodiment of private branch exchange according to the present invention Voice monitoring operation flow diagram of a telephone conversation according to an embodiment of the private branch exchange according to the present invention Operational transition state diagram of one embodiment of a private branch exchange according to the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Private branch exchange system 2 Private branch exchange 3 Communication path switch 4 Main controller 5 Memory | storage device 5a Virtual button structure data area 5b Monitor registration data area 6a-6n Telephone stand 7 Public network DBLa-DBLn Telephone base line circuit LINa-LINK Monitor line Circuit PRIa to PRIj Station line circuit Pa, Pb Call path BU Control bus LC Control line

Claims (3)

For a plurality of extension terminals having a virtual button for executing virtual number reception and virtual number transmission, a monitor button for monitoring voice during a call, an extension trunk connected to each of the extension terminals, and a plurality of monitors A trunk, a station trunk that accommodates a station line from the public network, a communication path switch that forms a call path, a main controller that controls the operation of the entire private branch exchange, and a storage device that stores processing procedures, data tables, and the like A private branch exchange system comprising a private branch exchange,
The main control device notifies an incoming call that has arrived at the local trunk by displaying the incoming call on the virtual buttons of the plurality of extension terminals, and the virtual button being displayed is pressed, The extension terminal that has been pressed is made to respond to an incoming call and is put into a call state. When the virtual button and the monitor button of the extension terminal other than the call state are pressed, the call state is set via the call path switch. A private branch exchange system characterized in that a call path is formed between the local line trunk and the monitor trunk corresponding to the pressed monitor button, and execution of voice monitoring of the call is controlled. 2. The private branch exchange system according to claim 1, wherein the storage means includes a virtual button configuration data area for storing a plurality of virtual number data and station line accommodation position data corresponding to the virtual number data. 2. The storage means comprises a monitor registration data area for storing extension terminal accommodation position data, monitor number data, monitor trunk accommodation position data, and said station line accommodation position data. Private branch exchange system.

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