JPS6198046A - Testing method of data communication controller - Google Patents

Abstract

PURPOSE:To improve the efficiency of a test of the construction of an electronic exchange which makes a data communication through a digital terminal such as a computer and a data terminal and a modem by expanding the test range stepwise from a communication controller as the test of the construction. CONSTITUTION:A central processor CC12 is connected to a network NW11 and a data communication controller DCC13. The DCC13 is connected to a host computers 20 and a terminal 21 by an interface 14 through leased circuits 17-1 and 17-2 including modems 15 and 16, and 18 and 19. The return route (1) in the interface, return route (2) of the DCC13 at an output terminal side, and return routes (3) and (4) of the modems at output terminals are set successively under the control of the CC12, and a signal from the NW11 is sent back at every time to compare the sent signal and received signal with each other, thereby detecting the occurrence section of a fault. Consequently, the test of the construction and an analysis of the cause of the fault are facilitated.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides data communication control in an electronic exchange equipped with a data communication control device that performs data communication with a plurality of digital terminals such as computers and data terminals via modems. The present invention relates to a testing method for data communication control equipment that makes it possible to conduct equipment construction tests in stages.

[Conventional technology]

Conventionally, as a construction test for electronic exchanges, only loopback tests within the own equipment have been performed, and this has been sufficient to achieve the purpose of the test. However, as computers and data terminals began to be connected to electronic exchanges, it became insufficient for construction tests to include loopback tests within the own equipment.
There is a growing demand to further expand the scope of testing.

When performing data communication between an electronic exchange and a computer or data terminal, the central control unit of the electronic exchange (
A data communication control device having a configuration as shown in FIG. 5 is provided between the CC) and the terminal. In Figure 5, 1
is the central processing unit (CC), 2 is the data communication control unit (D
CC), and the DCC 2 connects the main control unit 3 which is the main body of control, the CC interface unit 4 which mediates the exchange of information between the main control unit 3 and the CCI, and the connection line # to the main control unit 3.
0. It consists of a line interface section 5 that mediates the exchange of information with #l.

In an electronic exchange equipped with such a data communication control device, a loop switch is installed in the data communication control device for construction tests, and this switch is used during the test.

By turning on the switch, a transmission/reception return circuit can be formed in the line interface section, thereby making it possible to confirm the normality of the operation of the data communication control device.

However, although multiple digital terminals such as computers and data terminals are further connected to the data communication control equipment via modems, conventional construction testing methods have only carried out loopback tests within the data communication control equipment. Ta. In the case of electronic switching equipment equipped with a data communication control device, it is not sufficient to perform a loopback test within the device itself as a construction test; as mentioned above, devices other than the data communication control device are connected. , When a failure occurs, it is not possible to immediately analyze the cause of the failure.

[The point that the invention attempts to solve]

In the case of electronic switching equipment equipped with a data communication control device that performs data communication with multiple digital terminals such as computers and data terminals, it is not possible to identify the cause of the failure in the event of a failure by simply conducting a loopback test within the own equipment as a construction test. There is a problem in that analysis requires a lot of time, which not only requires a lot of manpower but also prolongs the construction period.

[Means for solving problems]

The test method of the present invention is performed in an electronic exchange equipped with a data communication device that communicates with a plurality of digital terminals via modems, and is equipped with a loop switch to form a return circuit for transmission and reception within the data communication device.
A loop adapter that directly connects any two connection lines corresponding to multiple terminals of a data communication control device, and a loop adapter that directly connects any two terminal side connection lines of multiple modems. Loop-back connections and loop-back connections between different terminal-compatible connecting sections in a connecting section that supports multiple terminals of a data communication control device and between terminal connecting sections of different modems are sequentially performed, and transmission and reception in opposite directions are returned at each connecting section. By sequentially forming circuits, the loop test is performed while expanding the test range step by step.

[For production]

In the data communication control device testing method of the present invention, in an electronic exchange equipped with a data communication control device that performs data communication with multiple digital terminals such as computers and data terminals via modems, the data communication control device is tested as a construction test. Since the loop test can be performed while expanding its range step by step, analysis in the event of a failure becomes easier and the construction period is shortened.

〔Example〕

FIG. 1 shows an embodiment of the data communication control device testing method of the present invention, together with the configuration of a target system. In the same figure, 11 is a network (NW),
12 is a central processing unit (CC), 13 is a data communication control unit (DCC), 14 is a line interface unit, 15
．． 16 is a modem, 17-1.17-2 is a dedicated line, 18.
19 is a modem, 20 is a host computer, and 21 is a terminal. Host computer 20° terminal 21 represents a plurality of data terminals.

In FIG. 1, NWII constitutes an electronic exchange by performing exchange processing under the control of CCl2. When this electronic exchange performs data communication with the host computer 20 or terminal 21, the DCC 13 controls the reading of data from the host computer 20 or terminal 12 and the writing of data from the electronic exchange to the host computer 20 or terminal 21. conduct. D CC1
Communication between 3 and the host computer 20 or terminal 21 is carried out via a dedicated line 17-117-2, respectively.
Dedicated line 17-, . Modem 15, 16 and modem 1 are used to convert the signal of 17-2 and the signal of DCC 13 and host computer 20 or terminal 21, respectively.
8.19 has been inserted.

In the system shown in FIG.
When performing a construction test on the C13, first turn on the test mode switch in the DCC 13, and a loopback route (2) shown by a broken line is formed in the line interface section 14.

Next, when test transmission data is sent from the CCl2 to the DCC 13, the firmware in the DCC 13 receives the data and then sends the received data to the line interface unit 14.

Since the test mode switch is on, the transmitted data is looped back within the line interface unit 14 and sent back to the CCl2 via the firmware. CC12
Then, the normality of the DCC 13 can be tested by comparing the received data and the transmitted data and detecting a match.

Next, turn off the test mode switch and return route■
Restore the connection line #0 and connect it to modem 15 of DCC13.
Then, by removing connection line #1 connecting to the modem 16 and connecting a direct return cable to that portion, a return route (2) shown by a broken line is formed. After that, by sending test transmission data from CCl2, D
A test can be performed to confirm the normality of the portion including the exit of the CC 13, that is, the line interface section 14. In this case, the test is to transmit from connection line #0 and
This can be done both in the case of receiving on connection line #1 and in the case of transmitting from connection line #1 and receiving on connection line #0.

Next, restore the return route (■) by removing the dedicated line 17-1 from the modem 15 and the dedicated line 17-2 from the modem 16, and connecting the direct connection cable to that part. form. As a result, a similar test for confirming the normality of the parts including modems 15 and 16 can be performed when transmitting from modem 15 and receiving at modem 16, and when transmitting from modem 16 and receiving at modem 15. It can be done in both directions.

Next, restore the loopback route of mode (2), remove the connection line connecting the modem 18 to the host computer 20, and the connection line connecting the modem 19 to the terminal 21, and connect the direct connection cable to the broken line. Form the turnaround route ■ shown. As a result, a test for confirming the normality of the parts up to modem 18 and 19 can be performed in the same manner when transmitting from modem 18 and receiving at modem 19, and when transmitting from modem 19 and receiving at modem 18. It can be done in both directions. After the test is over, restore the turnaround route ■.

FIG. 2 shows a specific example of the configuration of the return route (2) in the line ink face unit 14.

In the figure, the line connection control signal becomes 0'' when the test mode switch is off, and becomes +1111 when the test mode switch is on.Gate 30-1+30
z, 30 3+ 30 4 and gate 31+.

31 2, 31 3.31 4 are controlled to be on and off, respectively, when the line connection control signal is "0", and are controlled to be off and on, respectively, when the line connection control signal is "1". . Therefore, when the test mode switch is off, the host computer 20 or terminal 2
The received data RD from 1 is connected to the received data input terminal Rx data via the gate 30+, and the transmission ready signal C
S is input to the transmit ready signal input terminal CTS via gate 30-2, carrier detection signal CD is input to carrier detection signal input terminal DCD via gate 30-3, and data set ready signal DR is input to gate) 304. The data set ready signal is then input to the data set ready signal input terminal DR.

Now, when the test mode switch is turned on, the signal at the transmission data output terminal Tx data is connected to the reception data input terminal Rx data through the gate 31-+, and the signal at the transmission request signal output terminal DTP is connected through the gate 31-2. The signal is input to the ready-to-send signal input terminal CTS, and the same signal is input to the carrier detection signal input terminal DCD via another line and gate 31-3, and the signal is input to the DCC ready signal output terminal ER.
The signal is inputted to the data set ready signal input terminal DR via the gate 31 and the intra-apparatus loop connection in the DCC 13 is established by each of these loop connections.

FIG. 3 shows a specific example of the configuration of the return route (2) at the package exit of the DCC 13. In the same figure, the terminal number is clearly indicated only on the #0 line side, but
The same is true for the 1st line side.

In Fig. 3, the transmission data SD on the #1 line side is sent to the received data input terminal RD on the #0 line side, the DCC ready signal ER on the #1 line side is sent to the data set ready signal input terminal DR on the #0 line side, and the #1 line side DCC ready signal ER is sent to the data set ready signal input terminal DR on the #0 line side. The transmission request signal R3 on the 1st line side is input to the carrier detection signal input terminal CD on the #0 line side, and the signal on the transmission data terminal SD on the #0 line side is input as the reception data RD on the #1 line side, and The signal of the transmission request signal output terminal R3 on the side is the carrier detection signal C on the #11 line side.
As D, DCC ready signal output terminal ER on the #0 line side
The signals are respectively input as the data set ready signal DR on the #1 line side, and the reception request signal R3R is input as the send ready signal CS. From the line side #
A loopback to the 0 line side is performed, and a loopback connection is performed at the package exit of the DCC 3.

FIG. 4 shows a specific example of the configuration of the return route in the modem. In the same figure, the loopback route (3) at modems 15.16 is illustrated, but modem 18.
The same applies to the return route ■ in No. 19.

In FIG. 4, the transmitting line LINE 2W of the modem 15
, S are connected to the receiving line LINE R of the modem 16 by a return cable, and are connected to the transmitting line LI of the modem 16.
NE 2-0S is the modem 15 receiving line I, INE
I? connected by a wrap cable. As a result, the signal on the #0 line side is transferred from modem 15 to modem 16.
The signal from the #1 line is looped back from the modem 16 to the #0 line via the modem 15, and a loopback connection is established at the modem.

〔Effect of the invention〕

As explained above, according to the test method for a data communication control device of the present invention, an electronic exchange equipped with a data communication control device that performs data communication with a plurality of digital terminals such as computers and data terminals via a modem. , we have made it possible to carry out repeat tests as construction tests for data communication control equipment while gradually expanding the scope of the tests.
This makes it easier to analyze the cause of a failure and shortens the construction period.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an example of the testing method for a data communication control device of the present invention, FIG. 2 is a diagram showing a specific configuration example of a return route in a line interface section, and FIG. FIG. 4 is a diagram showing a specific example of the configuration of the return route at the package exit, FIG. 4 is a diagram showing a specific example of the configuration of the return route in the modem, and FIG. 5 is a diagram showing an example of the configuration of the data communication control device.

Claims (1)

[Claims] In an electronic exchange equipped with a data communication device that communicates with a plurality of digital terminals via modems, and is equipped with a loop switch to form a return circuit for transmission and reception within the data communication device, A loop-back adapter that directly connects any two connection lines corresponding to a terminal and a loop-back adapter that directly connects any two terminal-side connection lines of a plurality of modems are provided, and the loop switch controls loop-back connection within the device and data communication. Sequentially performing loopback connections between different terminal-compatible connecting sections in a connecting section corresponding to a plurality of terminals of a device and between terminal connecting sections of different modems to sequentially form loopback circuits for transmission and reception in opposite directions at each connecting section. 1. A method for testing a data communication control device, characterized in that repeat tests are performed while gradually expanding the test range.