JPH0226436A - Data communication system - Google Patents

Abstract

PURPOSE:To facilitate control in a network layer on the side of a data terminal unit by executing transmitting and receiving control by a data exchanging network controller in accordance with a program inputted beforehand from the data terminal unit. CONSTITUTION:A transmitting control procedure and a receiving control procedure are transmitted collectively in a program format from a data terminal unit 6 stored in an exchange network 1 to a data exchanging network controller 3 through the exchange network 1 and they are accumulated in the data exchanging network controller 3. When there is a transmission request from the data terminal unit 6, a conditional decision is made and a transmission connecting control is executed in accordance with the accumulated program. When there is a reception in the data terminal unit 6, the data exchanging network controller 3 makes a conditional decision and executes a receiving connection control in accordance with the program and connects a data line. Thus, it becomes unnecessary for the data terminal unit 6 to execute the complex control of the network layer.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a data communication system in an electronic private branch exchange system.

[Conventional technology]

Conventionally, in this type of data communication, control at the network layer was performed by a data terminal device each time a transmission was made. In other words, the data terminal device itself determines whether the other party's data terminal device is busy, unresponsive, or has a network failure each time it makes a call, and depending on the situation, it can make a call to another data terminal device, make a detour call, etc. Control was performed according to a program inside the data terminal device.

[Problem to be solved by the invention]

In the conventional data communication method described above, control at the network layer is performed by the data terminal device, so it is necessary to control the transmission procedure, process when the other party's data terminal is busy or does not respond, monitor network failures, and control detours. The drawback is that control in the network layer on the data terminal device side is complicated and requires a large-scale program.

Also, 1 from the data terminal device to the electronic private branch exchange.
Since control is performed based on commands and responses, the control takes time and has the disadvantage that there is a high risk of errors occurring during the process.

[Means to solve the problem]

The data communication system of the present invention includes a data exchange network control device provided in an electronic private branch exchange having a data communication function, and a transmission control procedure from a data terminal device accommodated in the exchange network to the data exchange network control device through the exchange network. and the incoming call control procedure are sent all at once in a program format and stored in the data exchange network control device, and when there is an outgoing request from the data terminal device, the data exchange network control device transmits the incoming call control procedure in accordance with the stored program. Outgoing connection control is performed while determining conditions, and when an incoming call is received at the data terminal device, the data exchange network control device performs incoming connection control while determining conditions according to a stored program, and establishes a data line connection. This is the configuration to do it.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

Fig. 1 is a configuration diagram showing an embodiment of the present invention, Fig. 2(a)
, (b) and (C) are diagrams explaining the outgoing connection procedure in the same embodiment, and FIGS. 3(a) and (b).

(c) is a diagram illustrating the incoming call connection procedure in the same embodiment.

First, the outgoing connection procedure will be explained with reference to FIGS. 1 and 2. Here, the extension numbers of the data terminal devices 6.9°12 are assumed to be 200, 201, and 202, respectively. Exchange CP
When U2 detects the R3-232CER double signal data terminal ready) ON (■) from the data terminal device 6, it connects the data terminal device 6 and the data exchange network control device 3 via the exchange network 1, and then turns on (■) ), turns on the R5-232CDR double signal data set) to the data terminal device 6), and notifies the data terminal device 6 that preparation for command reception is complete. The data terminal device 6 waits for the DR multiplication signal N, and transmits the programs 1), (2), and (3) shown below to the data exchange network control device 3 through the exchange network 1 (■).

CALL 5TN201・・・・・・(1)IF 5T
N2.0L=BUSY THEN CALL 5TN2
02 ・・・・・・(2)IF 5TN2022BU
SY THEN 14EssAGE”ALL
BUSY"...(3) The meaning of this program is "First, call extension 201, and if 201 is busy, call extension 202, and if extension 202 is busy. If so, the message ``'ALLBUSY'' is returned to the originating data terminal.'' This program is stored in the memory inside the data exchange network control device 3.

In FIG. 2(b), the data network control device 3
2 (a) due to a transmission request from the data terminal device 6.
) performs outgoing control according to the program received. Here, since the data terminal device 9 with the extension number 201 is communicating with another data terminal device, the data exchange network control device 3 next uses the data terminal device 1 with the extension number 202.
2, and if it is empty, turn on the R3-232CCI multiplier signal called display) to the data terminal device 12, and at the same time send the message “INCOMING 200” and send the message from the data terminal device 6 number 200. Notifies you of an incoming call (■). It also sends a message "CALLING 202" to the data terminal device 6 on the originating side, informing it that the data terminal device 12 numbered 202 is being called (■).

In FIG. 2(C), the data terminal device 12 is R5-2
When the incoming call is answered by turning ON the 32CER double signal data terminal ready (■), the data network control device 3 sends the data terminal device 6.32 to the exchange CPU 2.
After outputting a communication path connection request between 12 and connecting the data communication path (■), 'RE' is sent to the data terminal devices 6 and 12.
ADY" message is sent to notify the establishment of the data link (■, [phase]). From this point on, the data communication will be between the data terminal devices 6 and 12. Note that in this embodiment, the A data exchange network control device 3 performs state management during communication and data adapter control.

Next, the incoming call connection procedure will be explained using FIG. 1 and FIGS. 3(a), (b), and (c). The following program (4) is input from the data terminal device 6 to the data exchange network control device 3 by the method explained in FIG. 2(a).

IF CALLING=201 THEN ANSWE
RELSE ) II ESSA GE BUSY''
(4) This program responds to incoming calls from number 201, but in the case of incoming calls from other data terminals, it sends a BUS to the calling data terminal.
Y" means to send messages and not accept incoming calls.

In FIG. 3(a), when there is an outgoing request from the data terminal device 12 with extension number 202 to the data terminal device 6 with extension number 200 (0), the data exchange network control device 3 receives the incoming call with extension number 200. Makes a determination according to the program and sends “'BUSY” to the data terminal device 12.
Send a message (o).

In FIG. 3(b), when there is a call request from the data terminal device 9 with extension number 201 to the data terminal device 6 with extension number 200 (■), the data exchange network control device 3 similarly sends a call to data terminal device 6 with extension number 200. The determination is made according to the incoming call program, and as a result, the C
Turn on the I signal and also INC0MING 201”
message to notify that there was an incoming call from extension number 201 (o). It also transmits a message "CALLING 200" to the data terminal device 9 on the calling side, informing it that the data terminal device 6 numbered 200 is being called (■).

In FIG. 3(c), when the data terminal device 6 turns on the ER signal and responds to the incoming call ([phase]), the data exchange network control device 3 connects the data communication path. 6.9 for 'RE A
The message ``D Y'' is transmitted (■, 0>. From then on, data communication is performed between the data terminal devices 6 and 9.

〔Effect of the invention〕

As explained above, according to the present invention, the data exchange network control device performs outgoing and incoming call control according to the program inputted in advance from the data terminal device.
Data terminal equipment can freely program outgoing and incoming connection procedures without performing complex control of the network layer.

[Brief explanation of the drawing]

FIG. 1, FIG. 2, and FIG. 3 are diagrams showing one embodiment of the present invention. ]°゛ Switch network, 2... Switch CPU, 3
...Network control device for data exchange, 4,7゜1
0...Digital line circuit, 5,8.11...Dehano graduate I Leap

Claims (1)

[Claims] An electronic private branch exchange having a data communication function is provided with a data exchange network control device, and a data terminal device housed in the exchange network transmits outgoing control procedures and incoming call control procedures to the data exchange network control device in a program format through the exchange network. The data exchange network control device transmits the data in bulk and stores it in the data exchange network control device, and when there is an outgoing request from the data terminal device, the data exchange network control device performs an outgoing connection while determining conditions according to the stored program. control, and when there is an incoming call to the data terminal device, the data exchange network control device performs incoming call connection control while determining conditions according to a stored program;
A data communication method characterized by a data line connection.