JPH01228362A - Called side transfer system by calling side operation - Google Patents

Abstract

PURPOSE:To bring the called side to transfer control by an operation of the calling side by constituting the title system so that even in the course of a call to a telephone set of the other partly side, or even in the course of calling, when the calling side dials one numeral, one digit of the end is replaced, and other extension is called. CONSTITUTION:When a calling side telephone set A dials an extension number 5221 in order to call a called side telephone set B, a central controller calls an extension B. When the other party side answers, a call to the extension B is executed. When a dial 2 of the telephone set A is received from an extension A in order to execute a transfer in the course of a call, the central processor converts it to dial number 5222 of an extension C and connects it to the extension C. Subsequently, in case of calling the extension B, when the other party side is very late in answering, when the telephone set A dials 2 in order to transfer it to the telephone set C, the central control equipment converts it to the dial numeral 5222 of the extension C and connects it to the extension C. Next, when the extension C is free, a ring-back tone is sent out to the extension C, and the extension A and the extension C can execute a call. When the extension C is not free, a busy tone is sent out to the extension A.

Description

[Detailed Description of the Invention] [Summary] Regarding a method of transferring a called party by operation of a calling party in an exchange connection in a private branch exchange, Ikeuchi's The purpose of this is to receive and detect dialing from the calling party's extension while the calling party's extension is ringing the called party's extension or during a conversation with the called party's extension. Accordingly, the central control unit of the private branch exchange replaces the last digit of the extension number and is configured to call the extension telephone of the replaced extension number.

[Industrial application field]

TECHNICAL FIELD The present invention relates to a called party transfer method based on the calling party's operation of a switched connection in a private branch exchange.

In recent years, with the digitalization of private branch exchange systems, various exchange services have become controllable by a central controller via a network.

For example, there is a case where an extension telephone of a private branch exchange is in the middle of a call with an extension telephone in the same private branch exchange or an extension telephone in another private branch exchange via a trunk line, or a call is transferred to another extension telephone in the same private branch exchange. In recent years, it has become necessary to transfer calls by simple operations on the calling side.

[Conventional technology]

The conventional transfer method operated by the calling party is applied when the other party's extension telephone is talking to another extension telephone. This is called a step call or a reset shift call, and a connection example is shown in FIG. In the figure, 3 is within the calling party'fa
Telephone A (extension number 5621), 4 is the extension telephone B (extension number 5221) of the party you want to call, 6 is the extension telephone D (extension number 5333) that is currently talking to B, and 5 is the extension telephone of the calling party that has transferred the call. Call extension telephone C (extension number 5222) that you want to call. Note that 1 is a time division network of private branch exchanges, and 2 is a central control unit, which controls exchange connections between extension telephones.

To explain the control flow using the flowchart in FIG. 5(a), in order to call the called telephone B from the calling telephone A, the central 1711 device receives a call dial 5221 from the extension A (41), and calls the called telephone B. If B is talking to another telephone and extension B is busy (42), a busy tone is sent to extension A. Dial of additional digit 2 from telephone A is received from extension A (43). Extension C with number 5222 is connected (44), and a ring tone is sent to extension C (45). A call is made in response to a response from telephone C (45), (46)
). If extension C is busy, sends a busy tone to extension A (
47). In this case, the transferable range is within the last digit number, and transfer to other digit numbers is not possible. This is a step call or a reset shift call.

Next, when the extension telephone in use is transferred, it is a callback transfer, and the control flowchart is shown in Fig. 5 (b).
), when the calling party's extension A and the called party's extension B are busy (51), the exchange detects the call from extension A and H3 (52), and the hold tone (music) is sent to extension A. (53), dial number 5 from extension B
222 is received (54), and if the telephone of extension C is not busy, extension B is connected to extension C (55). On-hook of extension B is detected (5(i)) and extension A and extension C are connected (57).

The above transfer methods have no restrictions on the number of digits for the transfer number, but
This differs from the step call or reset shift call described above in that the calling party's request for transfer is made by the called party's operation.

Division [What the invention tries to solve 4! Problem] As mentioned above, in the conventional transfer method operated by the calling party, if the other party is talking to another telephone, the transfer can be made by dialing the last digit number, so if the other party's telephone is ringing for a long time, the transfer is possible. If you want to call another phone when the phone does not answer, you have to disconnect the phone and redial. Also, if you want to transfer the call during a call to the other party's phone,
The drawback was that the operation had to be performed on the other party's phone. It is an object of the present invention to provide a method that allows a caller to transfer a call even during a conversation with the other party's telephone or even during a call.

[Means to solve the problem]

A diagram of the principle of the present invention is shown in FIG. In the figure, 1 is a time division network, 2 is a central control unit, 3 is a calling side telephone A, 4 is a called side telephone B, 5 is a forwarding side telephone C13゛ is an extension A trunk, 4゛ is an extension B trunk, 5゛ is extension C
A trunk, 7 is a memory connected to the central control unit, 8 is a ringback tone transmission trunk (RBT), and 9 is a ringing tone transmission circuit. (2) is a digit reception requesting means that enables dial reception during a call, and (2) is a means for storing the received digits in a replacement memory.

[Effect]

In the present invention, the calling side telephone A makes a call and the called side telephone B
When dialing the extension number, the private branch exchange consisting of the time division network 1 and the central control unit 2 checks the status of the called telephone B, and if the called party is busy, it sends a message to the calling telephone A. A medium tone is transmitted, and a ringing tone is transmitted to the calling side telephone A when the call is in progress. After the calling side telephone A hears the busy tone or ring tone, it dials the last digit of the telephone C to which it wishes to transfer. A means (2) for receiving this dialed number and a means (2) for calling the transfer telephone C to replace the last digit are constituted in the central control (2) device.

FIG. 2 shows a control flowchart 1 for explaining the present invention in detail.
shows. (a) is a means for receiving a dialing call;
When the RBT circuit 8 for sending a calling back tone is connected to the white WA trunk 3 while calling extension B (11
), in which mA), the central control unit 2 receives a number reception request from rank 3 (12).

Next, (b) is a received digit replacement means that receives the first digit on the dial from telephone A (13), and replaces the last digit of the dial stored in memory 7 in the central control unit 2 and converts it into a call signal for extension C. Store it in the memory 7 (14). Since the reception dial of the inner GB is stored in advance in the memory, it can be replaced. Connect to extension C and send out a ring tone (15).

〔Example〕

An embodiment of the present invention will be explained with reference to the principle diagram in FIG. 1 and control flowcharts 1 and 3.

In Figure 1, 3 is the calling party's telephone A (extension number 562).
1), 4 is called phone B (extension number 5221), 5
is the transfer side phone aC (extension number 5222).

To explain the control of the embodiment with reference to the control flowchart in FIG. 3, when calling side telephone A dials extension number 5221 to call called side telephone B, extension A trunk 3
The central controller receives a call dial from “(21)
. Detect whether extension B is free or not, and if it is free, use extension B.
(22). If the other party answers, a call is made to extension B (23). Call jlJA to transfer the call
Dial A.2 is received from extension A (24). The central controller converts the dial number of extension C to 5222 and connects to extension C (25). Send a busy tone to extension B (2
6) Detect whether extension C is free or not, and if extension C is free, send a ring tone to extension C (27). Extension A and In-
You can talk to line C (2 days). If extension C is not vacant, a busy tone is sent to extension iA (29). Next, when extension B is ringing (22) and the other party does not answer, telephone A dials 2 to forward the call to telephone C, and the central controller receives the dialed digit 2 from extension A (30). ), converts the dial number of extension C to 5222, and connects to extension C (31). If extension C is vacant, a ring tone is sent to extension C (32), and extensions A and C can talk (33). If it is not vacant, a busy tone is sent to the internal IA.

Next, when receiving call dial 5221 from extension A (2
1) When extension B is not available, a busy tone is sent to extension A (35), and when the subscriber on extension A dials the number 2 to transfer to the phone IC (3G), dial 2 from extension A. Upon reception, the central control unit dials extension C, number 52.
22 (37), detects whether extension C is free or not, and if extension C is free, calls extension C (38), and allows a conversation between extension A and extension C (39). If extension C is not available, a busy tone is sent to extension A (40).

As a modification or application, the calling extension and the called extension can be applied not only to telephones, but also to data terminals and all other terminals that can be connected to the private branch exchange system. Furthermore, when the calling extension and the called extension are busy talking, it is also possible to transfer the calling extension by operating the called extension.

(Effects of the Invention) According to the present invention, when the calling party dials one digit, the last digit is replaced, other extensions can be called, and regardless of the state of the other party's extension, transfer control to the called party can be controlled by the calling party's operations.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the principle configuration of the present invention, and FIG. 2(a). (b) is a control flowchart explaining the present invention in detail, FIG. 3 is a control flowchart of the embodiment, FIG. 4 is a schematic configuration diagram of a conventional example, and FIGS. 5(a) and (b) are conventional examples. shows a control flowchart. In the figure, 1 is a time division network, 2 is a central control unit, 3 is a calling side telephone A, 4 is a called side telephone B, 5 is a transfer side telephone IaC 16 is a telephone D which is talking with B, 7 is a memory, 8 is Ringbacktone agent Patent attorney Igata
Sada - [Co., Ltd.] ■Principle configuration diagram of the present invention No. 1gJ (a) Calling dial receiving means (b) Received digit replacement means Control flowchart explaining the principle (a) Step call or (b) Reset in case of callback transfer Conventional control flowchart for shift call

Claims (1)

[Scope of Claims] In a private branch exchange that interconnects extension telephones under the control of a time division network (1) and a central control unit (2), a calling extension telephone (3) is connected to a called extension telephone (4). while calling or talking to the called party's extension telephone (4).
By receiving and detecting the dial from the calling side extension telephone (3), the central control unit (2) of the private branch exchange dials the number at the end of the extension number (1).
A called party transfer method operated by a calling party, characterized in that numbers are replaced and an extension telephone (5) of the replaced extension number is called.