JPH0646142A - Call waiting system - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a call waiting service for connecting a call line from an office line to a terminal device in a call in a switching device formed by connecting a plurality of terminal devices. [Structure] The storage device 12 of the exchange device stores the terminal device 15
Register the Luwaiting Class. When the switching device receives an incoming call directly from the office line to the terminal device in the call, it refers to the call waiting class to determine whether or not the incoming call is possible during the call, and If an incoming call is possible, display the incoming call from the station line to the corresponding terminal device,
Allows you to set the call path.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a call-waiting connection system by a station line of a switching device which enables a line connection to a terminal device during a call.

[0002]

2. Description of the Related Art Conventionally, in an automatic exchange apparatus formed by connecting a plurality of terminal devices, a terminal number and terminal data are given based on the connection position of the terminal devices. Therefore, as is well known, when calling a communication partner, the user dials the terminal number given to the terminal device used by the communication partner, while the exchange that received the dial is dialed. The connection position of the terminal is selected based on the terminal number and the corresponding terminal device is called.

According to such a method, when the called party for the purpose of communication is in a call, another user once answers, notifies that the called party is in a call, and responds by proxy or again. I had to call back.

On the other hand, in the switching equipment, it is possible to carry out call waiting on three lines of the extension terminal equipment, and
When a call is being made to or received from a central office line, there is a service that enables services to be received by using services such as distributed incoming call, repeater incoming call, and busy transfer. However, even in these cases, it is necessary for another user to once respond, to notify that the called party is in a call, and to respond by proxy or call again.

[0004]

As described above, in the prior art, when a party (terminal device) intended for communication is busy, it is not possible to call the party intended for communication directly from the station line. It was impossible.

An object of the present invention is to achieve communication even if the terminal device intended for communication is busy, by the terminal data given based on the connection position of the terminal device for calling directly from the office line. It is an object of the present invention to provide a switching device for making a call waiting connection directly from a station line to a terminal device that operates.

[0006]

DISCLOSURE OF THE INVENTION The present invention relates to an automatic exchange apparatus in which a plurality of terminal devices are connected, and the terminal device being used by the terminal data given based on the connection position of the terminal devices. It manages the call waiting connection from the central office line.

[0006]

The terminal data of the terminal number is registered in the plurality of terminal devices connected to the automatic exchange device. This terminal data
Data is managed according to the connection position of the terminal device.

By the above registration operation, the connection position of the called terminal of the called terminal is selected based on the dialed information of the called party terminal of the calling party, and the called party is not aware of the call state (corresponding terminal). A call waiting connection can be made even when the device is in a call.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the structure of an automatic exchange apparatus according to an embodiment of the present invention. In FIG. 1, a portion surrounded by a broken line indicated by reference numeral 10 constitutes an exchange device. This switching device 10 is composed of a speech path switch 11 and various elements connected to the periphery thereof. Among these elements, particularly important ones are the speech path switch 11 via a bus. Connected central processing unit 12
A storage device 13, a station line trunk 14 connected to another PBX or a station line, a PB signal receiving trunk 16, a three-way call trunk 17, and a plurality of terminal devices 15 are connected to the speech path switch 11. .

In the above configuration, the storage device 13 has
A program of the central processing unit 12 for controlling this exchange unit and various data required for its control are stored. An input / output device 18 is connected to the central processing unit 12 so that various data can be registered.

FIG. 2 shows the configuration of the terminal data stored in the storage device 13 for implementing the present invention.

This data is management data corresponding to the connection position of the terminal device.

The terminal management data 20 stores various data such as extension numbers and restriction classes given to the terminal device, and provides the service to the terminal device by this data. However, since this is no different from the conventional exchange device technology, the description thereof will be omitted.

Next, the call waiting class 21
Is data indicating whether or not the registered data is available for call waiting and communication of the utilizing terminal device, and is a part of the data in the terminal management data 20. It indicates that there is.

Thus, when the user of the terminal device is talking on the telephone, it is possible to manage whether the incoming call is possible or not.

In the terminal data, the terminal information such as the extension number is managed by INDXa. These management data are registered by the input / output device 18 connected to the central processing unit 12 and stored in the storage device 13.

FIG. 3 is a flow chart showing the operation of the exchange when the called party terminal number is received and the called terminal equipment is called.

The operation of calling the terminal device used by the called party for communication will be described below with reference to FIG.

First, when the dial of the terminal number used by the called party for communication is received from the calling party (S3
0), the central processing unit 12 retrieves the terminal data stored in the storage device 13 based on the received terminal number of the called party (S31).

Next, it is determined whether the corresponding terminal number is registered (S32), and if it is not registered, the connection is disabled (S37). On the other hand, if there is registration, the terminal device connection position is extracted and the state of the terminal device is checked (S3).
3).

As a result, if the corresponding terminal device is free, a call is made (S36), and if it is blocked, the call waiting class 21 (FIG. 2) of the terminal data is judged (S34), If it is unacceptable, it is impossible to connect,
(S38) If acceptable, the state of the three-way call trunk 17 is checked (S35).

As a result, if the three-way call trunk 17 is blocked, connection is disabled (S39), and if there is a free space, a call is made to the called party user terminal device via the three-way call trunk 17. Is performed (S36).

Next, the process of the central processing unit 12 will be described with reference to the state transition diagram shown in FIG. In the state transition diagram, the trunk line trunk is represented by the reference code COT, the PB signal receiving trunk is represented by the reference code PBR, the three-way call trunk is represented by the reference code CFT, and as an example of the station line receiving format, The direct-in-dial system is represented by the reference symbol DID.

First, when a DID arrives on the trunk line trunk,
The central processing unit 12 detects an incoming call (state 1), and the message
The presence / absence of transmission is determined (40).

If the message is sent, the task 41 is run. If the message is not sent, the task 42 is run, the station line trunk 14 and the PB signal receiving trunk 16 are connected, and the incoming call continues. The PB signal to be received is received by the PB signal receiving trunk 16 (state 2).

Next, the central processing unit 12 confirms the registration status of the received incoming call terminal number (43), and if there is registration, determines whether the corresponding terminal device is free (44).

If there is a corresponding terminal device, the task 45 is run, the called terminal device is called and waits for a response from the called party (state 3).

If the corresponding terminal device is blocked, the call waiting class 21 of the terminal data is confirmed (4
5) If call waiting is possible, check whether the three-way call trunk 17 is empty or blocked (46).
A call is made to the called terminal device via the terminal to wait for a response from the called party (state 4). At this time, the central processing unit 12
Sends a special sound to the incoming terminal device to notify the incoming call, and sends a ringing tone to the caller.

By the way, when the call waiting is not possible and the three-way call trunk 17 is blocked when the received terminal number is not registered, a distributed call, a specific extension call, an incoming call to the relay stand, a release, etc. are made. Although an incoming call comes in, this is no different from the service of a conventional switching device, and therefore its explanation is omitted.

Next, an operation example will be described with reference to the operation flow chart of FIG. 5 by taking as an example a case where an incoming call is received from an outside line during a call with the outside line.

During a call with the office line trunk 14 (51), when an incoming call comes from another office line trunk 14 (53), the central processing unit 12 causes the office line trunk 14 to receive two lines and extension callees. The connection is made via the trunk 17 for the person's call, whereby the ring tone is transmitted to the extension called party as a special sound (5
2).

At this time, the extension callee responds to the incoming call by pressing the transfer button when the terminal device is a multifunctional telephone or by hooking operation when the terminal device is a general telephone ((5)
5), the trunk line trunk 14 that was busy during this operation
Then, the hold sound is sent (54). Simultaneously with this operation, the extension called party enters a call state with the incoming trunk line trunk 14 (56). Further, when the user wants to switch from the incoming station line trunk 14 to the call with the station line trunk 14 that was in the call earlier, by pressing the transfer button (57), the incoming call to the station line trunk 14 is made. Is output (58), and the extension called party enters the call state with the station line trunk 14 in which the call was previously made (5).
9).

In this way, even when the terminal equipment is in a call,
By enabling the call waiting connection from the central office line, it is possible to reliably call the called party for the purpose of communication.

As described above, in the present embodiment, the trunk used is the office line trunk, and the incoming line type of the office line is DI.
As described in D incoming, this is merely an example and can be changed in any way according to the specifications of the exchange.

[0035]

As described above, in the exchange device of the present invention,
The data such as the terminal number is fixedly managed according to the connection position of the terminal equipment. Therefore, the call waiting class in the data is used to manage the call waiting connection from the central office line, and the call state of the other party who is the communication target is recognized based on the registration of the call waiting class. It is possible to freely make circuit-switched connection with the called party.

[Brief description of drawings]

FIG. 1 is a block diagram showing a hardware configuration of a switching device showing an embodiment of the present invention.

FIG. 2 is a registration area configuration diagram of terminal data of a terminal device.

FIG. 3 is an operation flowchart when a terminal device is called.

FIG. 4 is a state transition diagram showing an operation when receiving a DID call.

FIG. 5 is a flow chart showing an example of an operation during call waiting.

[Explanation of symbols]

 10 switching device 11 speech path switch 12 central processing unit 13 storage device 14 office line trunk 15 terminal device 16 PB signal receiving trunk 17 three-way call trunk 18 input / output device 20 terminal management data 21 call waiting class

Claims (1)

[Claims] 1. In an automatic exchange apparatus comprising a plurality of terminal devices connected to each other, means for allowing a terminal device in a call to receive a call from a station line, and operation of the terminal device in a talking state. Is provided with a means for detecting a response to an incoming call, and a control means for detecting an operation from the terminal device after the response, freely selecting two communication lines, and setting the communication state. The call waiting system is characterized in that the line can be connected from the central line even during a call.