JPS63161750A - Data call connection device - Google Patents

Abstract

PURPOSE:To allow plural terminal equipments to participate in a data call by applying retention and reconnection in a data call connection device. CONSTITUTION:When the transfer of required data is finished from a terminal T1 to a terminal T2, the terminal T1 sends data call retention request information S1 to a data exchange DSW, which switches the data call connection to the terminal T1 to the data call retention terminal DHT. When the next terminal T3 sends data call connection request information S2, the data exchange DSW switches the data call to the connection with the terminal set T3 to apply data communication between the terminals T2 and T3. Thus, one data call is utilized by plural terminals by following up the procedure of the cut-off/ recalling.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a data call connection device for a data exchange system, and more particularly to a data call connection device that allows a plurality of terminals to participate in one data call.

[? Prior Art] In a conventional data exchange system, the following steps were taken to transfer data using a data call connection device. First, a data call is requested from each terminal.

Then, when a data call is connected between the terminals, data is transferred. Once the necessary data transfer is complete, abandon this data call.

In this case, for one data call, one terminal or a device in place of the terminal is connected to the calling side and the called side, respectively, to form a data exchange system.

Then, data is transferred between these terminals, etc.
The data call was disconnected when one of the terminals abandoned the data call.

[Problems to be solved] When the above-mentioned conventional data call connection device indexes the same information on the same data exchange from two or more terminals, it is difficult to set up data calls for the number of terminals. There was a problem that it had to be done.

The present invention has been made in view of the above problems, and is a data call connection device that allows multiple terminals to participate in one data call by holding and reconnecting the data call within the data call connection device. For the purpose of providing.

[Means for Solving Problems] In order to achieve the above object, the data call connection device of the present invention switches connections between a data call holding terminal that holds a data call and a plurality of terminals, and also switches connections between a data call holding terminal that holds a data call and a plurality of terminals, and When a call hold request is received, the data call is switched to the data call hold terminal, and when a data call connection request is received from the above terminal, the data call is switched from the data call hold terminal to the terminal that requested the data call connection. This configuration includes a data exchanger that switches to

[Example code] Hereinafter, the present invention will be explained in detail based on the drawings.

FIG. 1 is a block diagram of a data call connection device according to an embodiment of the present invention, and FIGS. 2 to 4 are block diagrams showing a data call connection state in the data call connection device of FIG.

In FIGS. 1 to 4, TI, T2. T3 is the terminal, D S
W is a data exchange, and DHT is a data call holding terminal.

In the above configuration, it is assumed that a data call is requested from terminal T1 to terminal T2 via data exchange DSW, and the data call is connected as shown in FIG. When the necessary data transfer is completed, the terminal TI transfers the data to the data exchange D.
Data call hold request information Sl is sent to SW. The data switch DSW receives this data call hold request information S1,
The connection of the data call to terminal TI is connected to data call holding terminal D.
Switch to connection to HT. This state is the data call connection state shown in FIG.

Next, when the terminal T3 sends the data call connection request information S2 to the data exchange DSW, the data exchange WDSW
switches the data call connected to the data call hold terminal DHT to the connection with the terminal T3. That is, the fourth
Shifting to the data call connection state shown in the figure, data communication is performed between terminal T2 and terminal T3.

In this way, according to this embodiment, one data call can be used by a plurality of terminals without going through the procedures of disconnection and re-calling. This has made it possible to index the data being accessed from another terminal while accessing a database, or to provide Centrex services in conversational data communications.

[Effects of the Invention] As explained above, the present invention provides the following advantages in the data call connection device:
Holding and reconnecting data calls has the effect that multiple terminals can participate in one data call.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a data call connection device according to an embodiment of the present invention, and FIGS. 2 to 4 are block diagrams showing a data call connection state in the data call connection device of FIG. DSW: Data exchange DHT: Data call holding terminals TI, T2. T3: Terminal

Claims (1)

[Claims] In addition to switching the connection between the data call holding terminal that holds the data call and multiple terminals, when a data call holding request is received from the above terminal, the data call is switched to the data call holding terminal, and from the above terminal. 1. A data call connection device, comprising: a data switch which, upon receiving a data call connection request, switches the data call from the data call holding terminal to the terminal that has made the data call connection request.