JPH1188515A - Transfer connection system and private branch exchange with transfer connection function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the transfer connection system for electronic private branch exchanges in which an incoming call during holding is not kept for a long time. SOLUTION: When transfer connection has not been made, a caller side accommodation position and presence/absence information of a holding call are stored in a storage device 2 as holding call information. A central controller 1 monitors the presence of the holding call information in the storage device 2 periodically, and when the holding call information is present, the incoming of other call is informed by transmitting incoming call information to a transfer destination terminal equipment together with speech contents and the number of times of notice of the incoming call information is monitored and when the number reaches >= a setting value, a reception terminal equipment is again connected forcibly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a private branch exchange which accommodates a plurality of terminal devices and performs a circuit switching process and the like. The present invention relates to an extension transfer connection system that responds and transfers an incoming call to another terminal based on a transfer request.

[0002]

2. Description of the Related Art An extension transfer connection is based on a transfer request that a terminal that has accepted an incoming call from a calling terminal (hereinafter referred to as an accepting terminal) wants a caller of the calling terminal to transfer a telephone call. This is done by transferring.

In this case, the transfer connection is made without any problem if the transfer destination terminal (hereinafter referred to as a transfer destination terminal) can receive a call. However, if the transfer destination terminal is busy, it is necessary to transfer the incoming call. And the caller must be called back.

As a technique for enabling transfer connection even when the transfer destination terminal is busy, for example, Japanese Patent Laid-Open Publication No. HEI 3-11095
Since No. 3 publication has been discovered, its operation will be briefly described below.

When the transfer destination terminal is busy, the waiting code and the device number of the central office having the transfer call are written into the memory in the exchange as the incoming call information by the special number operation of the receiving terminal. Connect a ringtone to. When the transfer destination terminal releases the call, the incoming call information is read out from the memory, and the transfer destination terminal is automatically called based on this information, so that the transfer destination that releases the busy state with the caller from the office line or the like is released. You can make a call connection with the terminal.

[0006]

However, the technique disclosed in Japanese Patent Application Laid-Open No. H3-110953 can avoid recalling of the calling terminal, however, the call is not transmitted as long as the transfer destination terminal remains in a busy state. There is a problem that the calling terminal is kept waiting with the ringing tone.

[0007] Therefore, the present invention has been made in view of these problems, and it is an object of the present invention to prevent a calling terminal from waiting for a long time even when a transfer destination terminal is busy, and to enable smooth transfer connection. With the goal.

[0008]

According to the present invention, a central controller for controlling circuit switching, a communication path switch for switching connection between terminals under the control of the central controller, and storing circuit switching information. A private branch exchange having a function of transferring an incoming call to another terminal based on a caller's transfer request in a private branch exchange. The storage means for storing the terminal accommodation position of the terminal, and periodically controlling the presence / absence of a held call stored in the storage means, and controlling the transfer of the incoming information to the transfer destination terminal when the information indicating the presence of the held call is detected. A private branch exchange including the central control unit and having a transfer connection function that does not make a held call wait for a long time can be obtained.

In addition, the transfer destination terminal is notified of the presence / absence of a held call, the held terminal accommodation position, the accommodation position where the terminal that has received the incoming call is accommodated, and the incoming call information in association with the accommodation position of the transfer destination terminal. The storage means for storing the number of times, and periodically monitoring the presence or absence of a held call stored in the storage means, and when detecting the information of the presence of the held call, when the notification number is equal to or less than an arbitrary set value Controlling the transfer of incoming information to the transfer destination terminal, and reconnecting the reception terminal and the held call based on the accommodation position of the reception terminal stored in the storage device when the notification count is equal to or more than an arbitrary set value. There is a configuration having a central control unit, which is characterized in that a held call when the transfer destination terminal does not temporarily respond cannot be kept for a long time.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The operation of the present invention will be described. A call arriving from an office line or the like is interrupted to the central controller as an event, and a transfer process is performed to a transfer destination by a hooking operation of a reception terminal or the like based on a transfer request from a caller. At this time, if the transfer destination is busy, the incoming call cannot be transferred and connected to the transfer destination, and therefore, the presence of a held call is written in the hold information storage area provided in the storage device 2. The central controller 1 periodically reads out the hold information and notifies the transfer destination terminal that there is a terminal on hold.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a system block diagram of a private branch exchange showing an entire configuration of an embodiment of the present invention.

Referring to FIG. 1, a central control unit 1 performs exchange control of the entire system. Specifically, a central control unit 1 receives a call (event) arriving at a communication path switch 3 and confirms a connection state between terminals in a storage unit 2. The switching control of the communication path switch 3 is performed to perform the call processing, and the storage device 2 is rewritten.

The storage device 2 has an area for storing the information indicating the connection status between the terminals (hereinafter referred to as communication channel connection information) and for storing the held call information managed for each accommodation terminal shown in FIG. The held call information means the held call information (presence / absence) and the accommodated position of the held terminal in the accommodation positions (areas 1 to n) of each terminal accommodated in the exchange when the transfer destination terminal is busy and cannot perform the transfer connection. It shows.

The communication path switch 3 performs switching connection under the control of the central control unit 1, and the trunk circuit 4 is an interface circuit between the office line and the exchange, and the terminals 5-1 to 5-n.
Denotes a terminal accommodated in the extension exchange, and the subscriber circuit 6-
1 to 6-n are interface circuits between the terminal 5 and the communication path switch 3.

In the embodiment of the present invention, the trunk circuit 4
The terminal 5-1 receives the incoming line signal received via the terminal (hereinafter, referred to as a receiving terminal in this example) and transfers and connects to the terminal 5-2 (hereinafter, referred to as a destination terminal in this example) as a transfer destination. The case will be described as an example with reference to the flowcharts shown in FIGS.

An incoming call arriving from an office line is sent to a trunk circuit 4.
The event is input to the central control device 1 via the. The central control device 1 recognizes that the terminal 5-1 has accepted the incoming call, performs a line connection process between the terminal 6 and the terminal 5-1,
The communication path connection information in the storage device is updated.

Next, the terminal 6 is connected to the terminal 5-1 by the terminal 5
The transfer connection process is performed by the terminal 5-1 making a hooking operation, a special number operation, and dialing the terminal number of the transfer destination terminal 5-2. If you want to complete the transfer connection.

When the transfer destination terminal 5-2 is busy, a busy tone flows to the terminal 5-1 due to a busy state. Here, when the terminal 5-1 dials the special number, the central control device 1 receives the special number and activates a setting processing flow of the held call information shown in FIG.

The central controller 1 checks again whether the transfer destination terminal 5-2 is idle or busy (step A1, step A2).

If the transfer destination terminal 5-2 is already vacant, a call is made to complete the transfer connection between the terminal 6 and the transfer destination terminal 5-2 (step A3).

When the transfer destination terminal 5-2 is busy, voice information (hereinafter, called incoming information) for notifying that there is an incoming call is transmitted to the transfer destination terminal 5-2 (step A4), and as shown in FIG. The accommodation position information of the trunk circuit 4 on hold and the information indicating that there is a hold call are stored in the accommodation position corresponding to the transfer destination terminal 5-2 (step A5). In this example, the accommodation position of the transfer destination terminal 5-2 corresponds to area 2. As the incoming information to be transmitted to the transfer destination terminal, voice information stored in advance in the storage device 2 or the communication path switch 3 is used, and the voice (communication content) from another terminal in the communication path switch 3 is used.
At the same time, it is superimposed by digital processing and transmitted to the transfer destination terminal 5-2.

In addition to the above-mentioned incoming call information transmission at the time of the transfer connection, the central control unit 1 periodically monitors the held call information storage area in the storage device 2 and determines again the incoming call information according to the presence or absence of the held call. Is transmitted. FIG. 4 is a flowchart showing the procedure for connecting the incoming information again.

The central controller 1 periodically reads out the held call information in the memory (step A6), and sends out the incoming call information when it is determined that there is a held call (step A8).
Therefore, if it is determined that there is a held call based on the periodically read held call information, the incoming call information is connected to the transfer destination terminal, and if there is no held call, the process is terminated as it is. Repeat the following steps.

Next, the transfer destination terminal 5-2 during the call recognizes that there is an incoming call waiting in accordance with the incoming call information that is periodically connected, and temporarily shifts to a held call shown in FIG. Activate the processing flow when responding.

When the transfer destination terminal 5-2 responds by the hooking operation, the processing flow is started (start), and the location corresponding to the accommodation position where the transfer destination terminal 5-2 is accommodated in the held call information storage area is read out. (Step A10) If there is no held call, the transfer operation process is executed by the hooking operation, and the call with the terminal which has been put on hold to temporarily answer the call is continued (Step A12). If there is a held call,
The on-hold tone is connected to the transfer destination terminal 5-2 and the other party talking on the call (step A13), and the call path of the terminal 6 waiting for the transfer destination terminal 5-2 is connected (step A1).
4).

When the connection of the communication path is completed, "No held call" is set in the location corresponding to the transfer destination terminal 5-2 in the memory 2 to clear the held accommodation position information (step A15).
Complete the transfer connection.

In the above embodiment, when a hold call is present in the hold information storage area, the incoming information is always sent to the transfer destination terminal, so that the transfer destination is notified of the existence of the hold terminal. Can do things. However, there is a possibility that the held call will be kept waiting for a long time unless the transfer destination terminal makes a primary response.

Therefore, as a second invention, specific means for solving the above problem will be described below, and the operation thereof will be described in detail below.

FIG. 6 shows the stored contents provided in a part of the storage device 2 for storing and managing the held call information. The number of notices for storing the reception terminal information at the time of setting the held call information and managing the number of times of sending the incoming call information. Is different from the configuration of the held call information storage area in FIG. When the number of notifications becomes equal to or more than an arbitrary set value, the receiving terminal that has first accepted the incoming call and the held call are reconnected, and the held call at the time of the transfer connection is not made to wait for a long time. It is characterized by.

Hereinafter, the operation of the second invention will be described in detail with reference to a flowchart.

When the transfer destination terminal is busy, the hold call information is set in accordance with the procedure shown in FIG. 3 by storing the hold call information and the hold position of the hold terminal in the storage location area of the corresponding transfer destination terminal. The own terminal information (reception terminal) is also stored.

The central control unit 1 periodically reads out the held call information storage area of FIG. 6 (step A16) and checks whether there is a held call (step A17).

If there is a held call, the number of times of notification of the incoming information transmitted is checked based on periodic monitoring, and if it is determined that the number is smaller than a preset value, the same as in the previous cycle,
The incoming information is transferred to the transfer destination terminal (step A19), and the notification count storage area is updated to N + 1.

When the number of notifications N exceeds the set value, in the example of FIG. 6, the terminal 5-1 and the terminal 6 accommodated in the trunk circuit 4 are reconnected (step A21).

[0036]

According to the present invention, it is possible to notify a transfer-destination terminal during a call that there is a held call and to answer the held call by restoring or hooking the transfer-destination terminal. This has the effect of eliminating the need to hold. Furthermore, even if the transfer destination terminal does not respond easily, the number of times of notification of the incoming information is monitored and the connection is forcibly reconnected to the accepting terminal, thereby avoiding a long wait for a held call and making a smooth transfer connection. The effect that can be performed.

[Brief description of the drawings]

FIG. 1 is a system block diagram of a private branch exchange according to an embodiment of the present invention.

FIG. 2 is a hold call information storage area for storing hold call information according to the embodiment of the first invention.

FIG. 3 is an exemplary flowchart illustrating a procedure for setting a held call information according to the embodiment;

FIG. 4 is a flowchart showing a connection processing procedure of incoming information according to the embodiment of the first invention.

FIG. 5 is a flowchart illustrating a processing procedure of a held call temporary response according to the embodiment;

FIG. 6 is a held call information storage area for storing held call information according to the embodiment of the second invention.

FIG. 7 is a flowchart showing a connection procedure of incoming information and a reconnection procedure based on the number of notifications according to the embodiment of the second invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Central control device 2 Storage device 3 Communication path switch 4 Trunk circuit 5-1 to 5-n, 6 Terminal

Claims (3)

[Claims] 1. A caller comprising: a central controller for controlling circuit switching; a communication path switch for performing switching connection between terminals under the control of the central controller; and a storage device for storing circuit switching information. In a private branch exchange having a function of transferring an incoming call to another terminal based on the transfer request, the storage means for storing the presence or absence of a held call and the held terminal accommodation position corresponding to the accommodation position of the terminal to which the call is to be transferred. And the central control unit that periodically monitors the presence / absence of a held call stored in the storage unit and controls the transfer of incoming information to a transfer destination terminal when information on the held call is detected. Private branch exchange. 2. In a private branch exchange, in a busy line transfer connection method of a transfer destination terminal, holding call information is stored in a storage means by hooking and dialing operation of a terminal that has received an incoming call, and the hold information stored in the storage means is stored. A transfer connection method in which call information is periodically read out, and when on-hold call information is detected, incoming information is superimposed on voice during a call and transmitted to a transfer destination terminal. 3. A caller having a central controller for controlling circuit switching, a communication path switch for performing switching connection between terminals based on control of the central controller, and a storage device for storing circuit switching information. In a private branch exchange having a function of transferring an incoming call to another terminal based on the transfer request of the terminal, the presence or absence of a held call, the terminal accommodation position of the held terminal, and the terminal that accepted the incoming call in correspondence with the accommodation position of the terminal to which the call is to be transferred. The storage means for storing the accommodation position in which the call is accommodated and the number of times the incoming call information has been notified to the transfer destination terminal, and periodically monitors the presence or absence of a held call stored in the storage means, and indicates whether there is a held call. If the number of notifications is less than or equal to an arbitrary set value, the incoming call information is transferred to the transfer destination terminal, and if the number of notifications is equal to or more than the arbitrary set value, the reception terminal stored in the storage device. Accommodation position A private branch exchange comprising: the central control unit for reconnecting a reception terminal and a held call based on the above.