JPH0242855A - Private exchange system - Google Patents

Abstract

PURPOSE:To execute the transferring and repeating of a call to the extension telephone set of an opponent to be desired by transferring to the opponent even if the extension telephone is in busy state to the call alternatively with the two opponents with call waiting function. CONSTITUTION:When there is the incoming of the call from a line wire and it is judged by a control part 4 that there is the incoming to the extension which just executes the call, it is judged by fetching data from a table A whether call waiting is allowed or not. When the call waiting is allowed, it is judged whether the call waiting key of the extension telephone set is pushed or not. When it is judged that the key is pushed, the present call opponent is caused to be in the holding condition of the call waiting and the data of the opponent are stored in correspondence to an extension DN of a table C and a calling condition is obtained with the incoming opponent from a trunk line. When a conference transferring key is pushed, the data of the present call opponent are stored to a table B as the opponent in conference holding and operation is transferred to a conference holding condition in the call waiting.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Field of Application) The present invention is directed to call waiting.
g) In a private branch exchange having this function, the number of telephone extensions is 2 due to the call waiting function.

(Conventional technology) What is the call waiting function?
When a call arrives from a central office line during a call on an extension telephone connected to an extension telephone (referred to as This is a hold/switch connection function that allows you to switch to a call mode and make a call. by the way,
Conventional devices of this type use the call waiting function when an extension phone receives a call from a central office line while the telephone is talking to another extension or external line (central office line), allowing the caller to receive the call later. You can talk alternately with the other party on the central line. However, according to this conventional device, once the call waiting function is used to alternately talk to two parties, the function that transfers the currently busy party to another extension is not possible. A problem arises in that a certain conference transfer function makes transfer impossible.

This is because in the conventional PBX, the conference transfer and call waiting functions are not related to each other.

Therefore, once call waiting is executed, even if the user wishes to transfer the incoming call to another extension, this cannot be done.

(Problem to be solved by the invention) In this way, if there is an incoming call from the central office line during a call, you can press the button from the local extension telephone that is busy to call the other party on the central office line 1 and the other party on the currently active extension line. There are some PBXs that have a function called a call waiting function, which allows you to talk by switching between one call and another.

On the other hand, a conference transfer function that transfers an incoming call from a central office line to another extension telephone after a connection response is also implemented as a service function of the PBX. However, in conventional systems, the call waiting function and the conference transfer function were independent functions and were not related to each other. , it will no longer be possible to transfer this to another extension using the conference transfer function.

Therefore, if you receive a call from a central office line and the other party requests to speak to another person, unless that person is nearby, you will have no choice but to have that person or the other party call you back.
The drawback is that it is extremely inconvenient and lacks service.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a private branch exchange system in which a call waiting function can also transfer a currently busy party to a desired extension using a conference transfer function.

[Configuration of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention is configured as follows. In other words, when an extension phone that is currently talking receives a call from the central office line, the other party's circuit and the incoming station line are put on hold.
A call waiting function that allows you to alternately switch between the calling party's line and the receiving station's line by connecting the other party's line, and a call waiting function that allows you to hold the calling party's line and transfer the held party's line to another extension. In a private branch exchange system that has a forwarding function to transfer the call, and in which both functions can be used from the connected extension telephone by operation from the connected extension telephone, the forwarding function registers the other party's line to be put on hold, and also transfers the call. A registration means for registering the other party's line to be put on hold by the waiting function; and a registration means for controlling the registration of the other party's line on hold when the call waiting function and the transfer function are executed, and the call waiting from the extension telephone. During operation, when the transfer operation is performed, the transfer function is implemented, and when the transfer destination extension telephone does not respond, the control means returns to call waiting.

(Function) This system with such a configuration has a means for separately registering the information on the other party's line on hold using the transfer function and the information on the other party's line on hold using call waiting. When a call is received, the control means performs hold and switching control to switch between the called party on the receiving station line and the busy party by call waiting operation from the extension telephone, and allows the call to be made by call waiting. Holding party line information is registered in the registration means, and when a transfer operation is performed, information on the party's line currently being called is registered in the registration means, and when the transfer destination extension responds, the information in the registration means is referred to and the information in the registration means is referred to. At the time of the transfer operation of the extension telephone that performed the transfer operation, the held party's line is exchanged and connected to the transfer destination extension, and the held party's line obtained from the held party line information from the call waiting is exchanged to the extension telephone that performed the transfer operation. According to the present invention, even in a call waiting state, the call party can be transferred to another extension when the transfer destination extension does not answer. This makes it possible to improve services.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In this system, the extension telephone uses the call waiting function to alternately talk to two parties (when the conference/transfer key of the extension telephone is pressed, the private branch exchange puts the current party on hold, Enables the transfer source to dial the transfer destination.If the transfer destination answers and the conference/transfer is successful, the call returns to a normal two-party conversation with the other party who was on hold due to call waiting. Also, if the extension phone does not conference or transfer a call that is on hold, it will put the other party on hold and put it in the same state as when the call was initially placed on hold. By equipping a private branch exchange with such a function, it is possible to perform conferences and transfers even in the call waiting function.A specific example will be explained in detail below.

FIG. 1 is a block diagram showing a schematic configuration of a private telephone exchange in an embodiment of the present invention, in which 1 is the main body of the exchange, 2a to 2n are extension telephones, and 3-1 to 3-m are A subscriber line (office line), 4 a control section, 5 a storage section, and 6 a maintenance terminal, respectively. The extension telephone 2
A to 2n are key telephones with call waiting keys and conference/transfer keys (?1 is a preset button telephone)
is used. The exchange main body 1 has a switching circuit 11, outside line circuits 12-1 to 12-m5, and extension line circuits 13-1 to 13-n.

The switching circuit 11 performs switching connections between extension lines, from an extension line to an outside line, and from an outside line to an extension line, and the control unit 4 controls the switching operation of this switching circuit 11 as well as various other controls as a whole. It is. The storage unit stores data such as various control programs and various tables of the control unit 4, and set function contents, and
It also has control programs for call waiting and conference transfer functions. Further, the maintenance terminal 6 is used to change, add, or delete data such as various tables and function contents stored in the storage section 5, and is used to perform operations such as changing, adding, or deleting data such as various tables and function contents stored in the storage section 5. have. The extension circuits 13-1 to 13-n are connection interfaces provided for each extension, and serve as connection interfaces between the switching circuit 11 and the electronic button telephones 2-a to 2-n, which are extension telephones. The outside line circuits 12-1 to 12-m are circuits that interface the exchange circuit 11 and the corresponding office lines 3-1 to 3-m, and also perform incoming call detection, DC loop closure for line capture, etc. be.

In addition, although not shown, a tone sending circuit is connected to the exchange circuit 11, and is configured to send out warning tones and the like to telephones and the like. These are connected to the control unit 4 via a control data bus line, and according to the control program stored in the storage unit 5 in advance, the communication paths between the office line groups 3-1 to 3-m and the telephones and the communication between the telephones are The control unit 4 is equipped with electronic key telephones 2-1 to 2-n, which are extension telephones.
When the call waiting key of each key is pressed, the code of the pressed key is received, and the table set in the storage unit 5 as shown in FIG. 2 is referred to or registered. When using call waiting, the party on hold for call waiting or the party on hold for conference transfer is recognized, and the party on hold for call waiting can be transferred to a conference or the party for conference transfer can be performed depending on the operation of the telephone that performed call waiting. It has a function that allows you to call the person on hold back to your own extension phone.

The control unit 4 also has a function of communicating with the maintenance terminal 6, and when the keyboard of the maintenance terminal 6 is operated, the input information can be stored in the storage unit 5, updated or deleted, or the stored contents can be read out. maintenance terminal 6
It has the function of sending the information to the maintenance terminal 6 and displaying it on the display of the maintenance terminal 6. In addition, by operating the function keys of the electronic button telephones 2-1 to 2-n, the control unit 4 stores the contents in the content storage unit 5 by operating the maintenance terminal 6, etc. It can be set by

FIG. 2 is a diagram showing the structure of each table held by the storage unit, and Table A in (a) shows the number of each extension corresponding to the port number (hereinafter referred to as PN), which is the number of the physical connection port of each extension. call waiting function is allowed (Al
This is a table that stores data that distinguishes whether the request is allowed (lowed) or not permitted (Not^flowed). In addition, Table B in (b) shows the directory number (Dir), which is registered data indicating the party on hold during call waiting (ColtWaiting), corresponding to the telephone number of the extension telephone.
This table stores the directory number (hereinafter referred to as DN) and the directory number type (DNType; data that distinguishes whether the other party's DN is an extension or an outside line). Similarly to table B, table C in (C) has the DN of the hold partner data as call waiting corresponding to the extension DN.
D N Type is stored.

In each table, "FF" is set as an initial value where no data is set.

Next, the operation of this system having such a configuration will be explained. now,
If there is an incoming call from an outside line, the control unit 4 connects the outside line circuits 12-1 to 12-1.
12-m detects an incoming call, and controls the switching circuit 11 to cause the call to arrive at the reception telephone. Then, when the telephone at the reception desk answers and the other party specifies a specific content, the reception desk operates to transfer the data to that extension.Thereby, the control unit 4 controls the switching circuit 11 to connect the extension circuit of the specific extension to the reception desk. Securing a communication path with the telephone set and calling the extension. If that extension answers, the two parties will be connected and able to talk. During this time,
The incoming external line is put on hold. After the extension has answered, the telephone at the reception desk performs a switching operation to connect the incoming external line that was on hold to the answered extension, and the control unit 4 controls the switching circuit 11 to establish a communication path with the calling side's central office line. Secure and connect the extension to enable calls. When the call ends and the extension telephone goes on-hook, the control unit 4 detects this and disconnects the line. Further, normal switching operations such as calling from an extension to an extension and calling from an extension to an outside line are the same as those of a normal switchboard.

By the way, this system is characterized in that even when the call waiting function is used, an incoming external line can be transferred to a desired extension by using the conference transfer function. Therefore, the detailed operation of this function will be explained with reference to the flowchart in FIG. That is,
In this system, when a call is received from an outside line, the control unit 4 determines whether or not the call is from a central office line for the extension line currently in use (Sl). As a result, if the call does not arrive at the extension that is currently on the line, the process advances to step S2, where the call processing is performed in the same manner as in the prior art. Further, if it is determined in step S1 that the extension that is currently talking has received an incoming call from the central office line, the process proceeds to step S2, where call waiting for that extension is performed.
A determination is made as to whether or not the data is allowed (Allowed) by importing data from table A. If it is determined that the data is not allowed (Not Allowed), step S is performed.
Proceed to step 17. If call waiting is permitted in step S2, the process proceeds to step S3, where it is determined whether or not the call waiting key on the extension telephone has been pressed.As a result, if it is determined that the call waiting key has not been pressed, , the process advances to step S17 and normal call processing is performed. On the other hand, if it is determined in step S3 that the call waiting key has been pressed, the process advances to step S4, where the current call party is put on hold for call waiting, and
The data of the other party is stored in table C corresponding to the extension DN. Furthermore, the call is made to the other party receiving the call from the central office line.

Then, in step S5, it is determined whether or not the conference/transfer key on the extension telephone has been pressed, and if it is determined that the conference/transfer key has not been pressed, the process proceeds to Stella 517, where conventional call waiting processing is performed. After the call waiting process is completed, the extension D of the tables B and C is
Clear the data corresponding to N. Furthermore, if it is determined in step S5 that the conference/transfer key has been pressed, the process proceeds to step S6, where the data of the current call party is stored in table B as the party whose conference is on hold, and the conference is put on hold by call waiting. Move. Then, the process advances to step S7 and the forwarding destination is dialed. Then, it is checked whether the extension to which the transfer destination is being transferred is busy (S8), and if it is not busy, a call is made (S9), and then the process proceeds to step S10, where it is determined whether or not the other party has answered, and the call is made. If it is determined that the extension has been conferenced or transferred, the process proceeds to step S11, where it is determined whether the extension has been conferenced or transferred. When it is determined that the conference/transfer has been carried out, the process proceeds to step S12, reads the data of the party on hold as call waiting from table C, returns to the normal two-party conversation with the party on hold, and proceeds to step S1. It becomes the initial state.

When the forwarding destination does not respond in step S10, or
If the other party is busy in Step 8, check whether the own telephone is on-hook (313), and if not on-hook, return to symbol ■; if on-hook, proceed to step S14 and automatically call back to the own telephone. do. If there is a response, the process proceeds to symbol ■ (S15). Also, S11
If it is determined that the extension did not conduct the conference/transfer, proceed to 2) for the symbol, and from this step 31.6.
Go to , read the data from Table B, find out which party is on hold, return to the call state with that party, and return to the normal call waiting state before pressing the conference transfer key. . and step S
Return to step 3 and check whether to exchange call parties.

As described above, even with the call waiting function, it becomes possible to perform a conference/transfer to the other party who is currently on the phone.

In this way, this system is a private branch exchange system that has both call waiting and transfer functions, and is equipped with a means to separately register the hold party line information for the transfer function and the hold party line information for call waiting. When a busy extension telephone receives a call from the central office line, the call waiting operation from the extension telephone performs a hold and switching exchange to switch between the receiving party on the central telephone line and the busy party. The caller is enabled to make a call, information on the other party's line on hold due to call waiting is registered in the registration means, and when a transfer operation is performed, information on the other party's line currently being called is registered in the registration means, and when the transfer destination extension answers, the Referring to the information of the registration means, exchange and connect the hold party line at the time of the transfer operation of the extension telephone that performed the transfer operation to the transfer destination extension, and connect the hold party line obtained from the hold party line information by the call waiting. The telephone is exchange-connected to the extension telephone that performs the transfer operation, and when the transfer destination extension does not answer, control is performed to return to the call waiting mode by a call-back operation. Therefore, even in a call waiting state, it becomes possible to transfer the caller to another extension, thereby making it possible to improve the service.

Note that call waiting, conference, and transfer can also be performed using a special number instead of using a dedicated key.

[Effects of the Invention] As described in detail above, according to the present invention, even when the extension telephone is talking to two parties alternately by the call waiting function, the call waiting function allows the extension telephone to communicate with the party who is currently talking. The transfer will be possible. Therefore, it is not possible to use the forwarding function to transfer a call received through call waiting to the telephone extension of the other party requested by the calling party without having to call the other party again. It is possible to improve the

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG.
The figure shows an example of a table used in this system, and FIG. 3 is a flowchart for explaining the operation of this system. DESCRIPTION OF SYMBOLS 1... Exchange main body, 2-1 to 2-n... Extension telephone, 3-1 to 3-m... Office line, 4... Control unit, 5...
・Storage unit,... exchange circuit, 2-1~1 1~1 3-m... outside line circuit. n...extension circuit,

Claims (1)

[Claims] When a call is received from the central office line to the extension telephone that is currently on the line, one of the other party's line and the incoming station line is put on hold, and by connecting the other, the call can be switched alternately and the call can be made. A private branch exchange system that has a transfer function that holds a call party's line and transfers the held party's line to another extension, and allows both of the above functions to be used from the connected extension telephone by operation from the connected extension telephone. a registration means for registering the other party's line to be put on hold by the transfer function and to register the other party's line to be put on hold by the call waiting function; and the registration means when performing the call waiting function and the transfer function. control means for registering the held party's line, and when performing the call waiting operation from the extension telephone, executes the transfer function when the transfer operation is performed, and returns to call waiting when the transfer destination extension telephone does not respond. A private branch exchange system characterized by the following: