JP2936028B2 - Transfer method for simultaneous calls - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone exchange system and, more particularly, to a transfer system for simultaneous telephone calls of a dealing telephone system used for performing financial transactions in financial institutions such as banks and securities companies.

[0002]

2. Description of the Related Art Conventionally, when a plurality of extensions are talking to one outside line (conference call, interrupt call, etc.),
The outside line could not be transferred to another extension.

That is, as shown in FIG. 4, conventionally, when a plurality of extensions (A to G) are in a busy state (S41) with respect to one outside line, of the plurality of extensions (A to G), Even if any one performs the transfer operation, the outside line is not transferred to another extension. For this reason, for example, extensions B to G are restored (calls from extensions B to G are terminated), and the conference trunk MET
When the extension A performs the transfer operation in the state of the intercommunication between the extension A and the central office trunk COT (S42) without passing through,
The outside line is temporarily put on hold and connected to a trunk (HST) for sending a hold tone. On the other hand, the extension A is in a state in which an outside line can be transferred to another extension, and is connected to a trunk (DT) that sends out a dial tone to listen to the dial tone (DT).

[0004]

In a dealing communication system, an incoming call from one outside line, such as simultaneous answering / calling of an extension to an incoming call (external line) and interruption calling with a plurality of extensions, is provided. Calls with multiple extensions frequently occur at the same time. However, conventionally, as described above,
When an incoming call from one external line is in a call state with a plurality of extensions at the same time, the external line cannot be transferred even if the internal line transfers one external line to another internal line.

SUMMARY OF THE INVENTION An object of the present invention is to provide an incoming call from one outside line while a plurality of extensions are simultaneously talking.
An object of the present invention is to provide a transfer method in a simultaneous call in which an external line is transferred to another extension by an operation of transferring an arbitrary extension during a call.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide any one of a plurality of extensions to perform a transfer operation while one outside line and a plurality of extensions are in simultaneous communication, and to transfer from the extension which performed the transfer operation. When the information is received, a disconnection process is performed on the extension other than the extension on which the transfer operation has been performed, and the extension on which the transfer operation has been performed listens to a dial tone and can transmit the extension of the transfer destination extension.

At this time, the outside line listens to the hold tone until one extension completes the transfer operation.

[0008]

When one of a plurality of extensions performs a transfer operation during a simultaneous call between one extension and a plurality of extensions, a forcible disconnection process is performed for an extension other than the extension that performed the transfer operation. Do. As a result, the internal line and the external line that have performed the transfer operation are in a one-to-one state. Thereafter, one external line can be transferred to another internal line by the processing conventionally performed.

[0009]

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

FIG. 1 is a relay system diagram showing the configuration of the dealing communication system of the present invention.

In FIG. 1, NW is a network for setting a communication path, EXTA to EXTG are extensions (extension terminal devices), LIN is an extension interface for interfacing extensions (EXTA to EXTG) and the NW, and COT is a public network. A central office trunk for interfacing with the NW, a MET is a conference trunk, a CPU is a central processing unit for controlling the entirety of the dealing communication system, and a MM stores a program, a table, and various data for controlling the dealing communication system. Storage device, BUS is CP
The figure shows a control system bus for transferring data between U and MM.

The dealing telephone system of the present invention has almost the same function as a normal private branch exchange.

FIGS. 2 and 3 are state transition diagrams for explaining the operation of the present invention.

The operation of the present invention will be described below with reference to FIGS.

When a plurality of extensions EXTA to EXTG are busy (S21) in response to an incoming call from one external line, the CPU monitors transfer information from all extensions EXTA to EXTG during the call. For example, at this time, extension EXT
When A performs the transfer operation and the CPU receives the transfer information from the extension EXTA, the extension lines EXTB to EXTG are forcibly restored, the call path is disconnected, and a busy tone indicating that the call is terminated. Outgoing trunk BT
And sends a busy tone to extensions EXTB to EXTG.

On the other hand, an incoming call from an outside line is connected to a trunk HST for transmitting a hold tone and put on hold. The extension EXTA that has performed the transfer operation listens to the dial tone DT indicating that the outside line can be transferred to another extension (S22). After this, even if extensions EXTB to EXTG are restored (handset down),
The state of the extension line EXTA and the outside line is maintained (S23).

Thereafter, conventional transfer processing is performed, and one outside line can be transferred to another inside line.

A state in which a plurality of extensions EXTA to EXTG are in a call with respect to an incoming call from one external line (S21).
At this time, when the extensions EXTB to EXTG perform a recovery operation, the CPU sets a communication path between the outside line and the inside line EXTA. (S31). Thereafter, when the extension EXTA performs a transfer operation, a conventional transfer process is performed, and one external line can be transferred to another internal line.

[0019]

As described above, according to the present invention, even when a plurality of extensions are simultaneously talking to an incoming call from one outside line via a conference trunk, any one of the plurality of extensions can be used. When one performs a transfer operation, the outside line can be placed in a transfer state.

[Brief description of the drawings]

FIG. 1 is a relay system diagram showing a dealing call system of the present invention.

FIG. 2 is a state transition diagram for explaining the operation of the present invention (part 1);
It is.

FIG. 3 is a state transition diagram for explaining the operation of the present invention (part 2);
It is.

FIG. 4 is a state transition diagram illustrating a conventional operation.

[Effect of Code] NW network (call path) CPU central processing unit MM storage device LIN extension interface COT central line trunk MET conference trunk HST music on hold transmission trunk A to G extension (extension terminal) BT busy tone (disconnection tone) trunk DT Dial tone trunk

Claims (1)

(57) [Claims] A transfer operation is performed when an arbitrary one of a plurality of extensions performs a transfer operation and transfer information is received from the extension that performed the transfer operation during a simultaneous call between one extension and a plurality of extensions. A transfer method in a simultaneous call, wherein a disconnection process is performed for an extension other than an extension so that the extension that has performed the transfer operation can transfer an outside line to another extension.