JPS61280145A - Data exchange and connection system - Google Patents

Abstract

PURPOSE:To attain communication even when the setting state of each data communication speed setting switch is different by inputting an output of a switch setting the data communication speed to a control circuit controlling the operation of the entire interface device and using its output signal to control a selector selecting a data communication speed. CONSTITUTION:When a control circuit 26a detects information, a call signal and dial information are given to an interface circuit 23 to read the setting information of a data speed setting switch 22, a selector 20 is controlled based on the read setting information to select the clock being an output of a timing generation circuit 21. In sending a call signal to an EX common controller, the setting information of the data speed setting switch 22 is sent. The EX common controller sends the setting information of the switch 22 altogether in sending the call signal to an incoming side DIF. On the other hand, the call signal and the setting information of the call signal are sent to a control circuit 26a at the incoming side DIF, the control circuit 26a controls the own selector 20 to select the clock being the output of the timing generation circuit 21.

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] When a call is set up, the data speed setting value notified from the data ink face device is notified and set to the other party's data ink face device, thereby matching the data speeds.

[Industrial application field]

The present invention relates to a data exchange connection system.

Conventionally, there has been a drawback that communication is not possible when the data speed setting switches provided on the inkface devices connected to the data terminal are different from each other, and there has been a strong demand for improvement.

[Conventional technology]

FIG. 2 is a diagram showing an example of a conventional data exchange connection system.

In the figure, 1.9 is a data terminal (DTE), 2.8 is an ink face device R (DIF), 7 is a digital exchange (EX), and 3.6 is a line circuit (DLC).
, 4 is the EX7 network, and 5 is the EX7 common control device. The same symbols represent the same objects throughout the following discussion.

In order to connect the data terminal 1.9 (hereinafter referred to as DTEI, 9) to the digital exchange 7 (hereinafter referred to as EX7) via a line, an ink face device 2 is installed on the DTE 1, 9 side.
．． 8 (hereinafter referred to as DIF2.8), and line circuits 3.6 (hereinafter referred to as DLC3, 6) are provided on the EXT side.

FIG. 3 is a data formant.

A data format shown in FIG. 3 is transmitted between DIF and DLC, and in this data format, F is a frame synchronization bit, D0 to D are data information, and S is a control signal.

FIG. 4 is a diagram showing an example of a conventional ink face device (DIF).

In the figure, 10 is a level conversion circuit, 11 to 14 are buffers, 15 is a multiplexing circuit, 17 is a demultiplexing circuit, 16 is a driver, 1 is a receiver, 19 is a counter, 20 is a selector, and 21 is a timing generator. circuit, 22 is a switch, 23 is an ink face circuit, 24 is a keypad, 25
26 is a control circuit, 27 is a lamp, and 28 is a buzzer.

In FIG. 4, the multiplexing circuit 15 multiplexes data information (Do to D5) from the DTE and the control signal (S) from the control circuit 26 into the data format shown in FIG. Send to the EXT side.

The data format shown in FIG. 3 sent from the EX7 side is received via the receiver 18, and the demultiplexer circuit 1
7, data information (Do~Ds) and control signal (S)
Separate into

The switch 22 is a switch for setting data speed, the buffers 11 to 14 are buffer memories for data speed conversion, and the ink face circuit 23 is an ink face for the control circuit 26 to send and receive control signals (S). be.

FIG. 5 is a diagram showing an example of a conventional line circuit (DLC).

In the figure, 30 is a multiplexing circuit, 31 is a demultiplexing circuit, and 32
is a driver, 33 is a receiver, 34 and 35 are buffers, and 36 is an ink face circuit.

In FIG. 5, a multiplexing circuit 30, a demultiplexing circuit 31
is a circuit that has the same function as the multiplexing circuit 15 and demultiplexing circuit 17 in FIG. 3, and the ink face circuit 36 is EX
This is an ink face for transmitting and receiving control signals (S) with the common control device 5 of No. 7.

The conventional data exchange connection system has the above-mentioned equipment configuration and is carried out using the method described below.

First, the calling party presses the control key 25 of the DIF 2 on the calling side, and further uses the keypad 24 to dial the number of the other party. When the control circuit 26 detects this information, it provides a calling signal and dial information to the ink face circuit 23. This information is sent to the track via the multiplexing circuit 15 and the driver 16.

It is sent to the EXT side via the railway and enters DLC3. D
In the LC3, a receiver 33, a demultiplexing circuit 31,
The information is finally transmitted to the common control device 5 of the EX7 via the ink face circuit 36.

The common control device 5 of the EX7 recognizes the destination DIF 8 based on this received information, and sends a calling signal to it.

This call signal is sent to the line via the ink face circuit 36, multiplexing circuit 30, and driver 32 of the DLC 6 of the BX7. Enter DIF8 via the railway, DIF8
At this time, the signal is transmitted to the control circuit 26 via the receiver 18, the demultiplexing circuit 17, and the ink face circuit 23.

The DIFB control circuit 26 turns on the call signal CI to the DTE 9 based on this information. When the DTE9 responds by turning on the ER multiplier signal due to this call signal CI, the control circuit 26 of the DIF8 receives this information and transmits this response signal using the exact same procedure as previously described in I) rF2 on the calling side. DeE
The information is transmitted to the common control device 5 of the X7.

As a result, the common control device 5 of EX7 sets up a bus in the network 4, and at the same time, the control circuit 26 of DIF2 on the calling side
Notify the other party of the response signal.

The control circuit 26 of DIF2 on the calling side thus
7 is turned on to inform the caller that the other party has answered, and data communication is started.

Next, the operation of DIF in the data communication state will be explained.

First, in DIF, the data rate is set by switch 22. In the example in Figure 4, 2.4K, 4.8,
There are four types, 8.6K, and 48, one of which is selected by the switch 22, and based on the information of the switch 22, the selector 20 selects one of the clocks output from the timing generation circuit 21. .

In the following, it is assumed that, for example, a communication speed of 4.8 is selected.

The transmission data SD of the DTEL on the calling side is clocked by this clock (4
, 8K) is taken into the buffer 11 via the level conversion circuit 10 of DIF2, and loaded into the buffer 12 every 6 bits taken. The load signal for the north and south buffers 12 is obtained from a pulse generated every six times the counter 19 counts the 4°8 clock.

The transmission data SD loaded into the buffer 12 is sent repeatedly to the multiplexing circuit 15 at a rate of 48, in this case 1.
0 times) and is sent out to the track via the driver 16.

Next, data reception will be explained.

The signal sent from DLC3 on the EXT side is sent to receiver 1.
8 and enters the demultiplexing circuit 17, and the demultiplexing circuit 17 demultiplexes data information (Do-D5) and control signal (
S) is separated into data information I! The data is received by the d&yo buffer 13. As described above, since the destination DIF side repeatedly sends data, the buffer 13 receives the same data repeatedly (10 times in this case) according to the data rate.

During this repeated data reception, the data in the buffer 13 is transferred to the buffer 14 by the output of the counter 19.
loaded into. The data loaded into the buffer 14 is synchronized with the received data RD of the DTEL according to the data rate clock.
Sent as .

In order to synchronize data between DTE1 and DIF2, transmission timing ST2 and reception timing RT are given from DIF2 side to DTEl.

Data communication is performed in this manner.

[Problem that the invention seeks to solve]

However, in the conventional data exchange connection described above, the data rate is fixedly set by the data rate setting switch for each DIF, so the setting positions of the data rate setting switch of the DrF on the calling side and the called side are different. There was a problem in that communication was impossible in some cases.

[Means for solving problems]

The problem mentioned above is that in the inkface device connected to the data terminal, there is a switch (
The output of 22) is input to a control circuit (26a) that controls the operation of the entire ink face device, and a selector (2) selects a data communication speed based on the output signal of the control circuit (26a).
0).

[Effect]

According to the present invention, the control circuit that controls the operation of the inkface device can detect the setting state of the data communication speed setting switch, and the data communication speed can be changed by the control circuit. Since the data communication speeds of the inkface devices on the calling side can be matched, the effect is that even if the setting states of the data communication speed setting switches of the respective devices are different, it is possible to freely communicate.

〔Example〕

FIG. 1 is a diagram showing an embodiment of an ink face device DIF according to the present invention.

In the figure, 26a is a control circuit according to the present invention.

The control circuit 26a according to the present invention is exactly the same as the control circuit 26 of the conventional ink face device DIF except for the following points. That is, conventionally, the data rate setting switch 22 was connected to the selector 20, but in the present invention, the data rate setting switch 22 is connected to the control circuit 26a according to the present invention, and the selector 20 is controlled by the output of the control circuit 26a. and selects the clock output from the timing generation circuit 21.

The data exchange connection according to the invention is therefore as follows.

The calling party presses the control key 25 of the DIF of the present invention and then uses the keypad 24 to dial the number of the other party.

When the control circuit 26a detects such information, it gives a calling signal and dial information to the ink face circuit 23, but at this time, it reads the setting information of the data rate setting switch 22 and controls the selector 20 based on the read setting information. The output clock of the timing generation circuit 21 is selected under control.

When sending a call signal to the common control device 5 of the EX7, setting information for the data rate setting switch 22 is also sent.

When the common control device 5 of the EX7 sends out a paging signal to the destination DIF, it also sends out the setting information of this switch 22.

On the other hand, on the receiving side DIF, the paging signal and the setting information of the switch 22 are transmitted to the control circuit 26a via the receiver 18, the demultiplexing circuit 17, and the interface circuit 23. The control circuit 26a controls its own selector 20 based on the setting information of the switch 22 to select the clock output from the timing generation circuit 21.

All other operations are as described in the prior art section.

〔Effect of the invention〕

As explained in detail above, according to the present invention, the calling side DIF
Since the data speeds of the DIF and the called side DIF can be matched, there is a great effect that communication can be carried out freely even if the settings of the switches 22 of the respective devices are different.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of an ink face device DIF according to the present invention. FIG. 2 is a diagram showing an example of a conventional data exchange connection system. Figure 3 shows the data format. Figure 4 shows the conventional ink face device (DIF).
It is a figure which shows an example. FIG. 5 is a diagram showing an example of a conventional line circuit (DLC). In the figure, 1.9 is a data terminal (DTE), 2.8 is an ink face device (DIF), 7 is a digital exchange (EX), and 3.6 is a line circuit (DLC).
, 4 is the EX7 network, 5 is the EX7 common control device, F is the frame synchronization bit, D0 to D are data information, S is the control signal, 10 is the level conversion circuit, 11 to 14 are buffers, and 15 is the multiplexer. 17 is a demultiplexing circuit, 16 is a driver, 18 is a receiver, 19 is a counter, 20 is a selector, 21 is a timing generation circuit, 22
is a switch, 23 is an interface circuit, 24 is a keypad, 25 is a control key, 26 is a control circuit, 27 is a lamp, 28 is a buzzer, 30 is a multiplexing circuit, 31 is a demultiplexing circuit, 32 is a driver, 33 is the receiver, 34.3
5 is a buffer, 36 is an ink face circuit, 26a
is a control circuit according to the present invention.

Claims (1)

[Scope of Claims] In an interface device connected to a data terminal, the output of a switch (22) that sets the data communication speed is connected to a control circuit (22) that controls the overall operation of the interface device.
26a), and a selector (20) for selecting the data communication speed is controlled by an output signal of the control circuit (26a).