JPH0470152A - Ncu interface test system - Google Patents

Abstract

PURPOSE:To improve the quality of a test, to shorten time for the test and to reduce required equipments by connecting a connector to a network control unit (NCU) interface and confirming the operation of an interface signal line according to a test program provided in the operation program of a communication control equipment. CONSTITUTION:A loop connector 43 is connected to an NCU control part 42 of a communication control equipment 41, and the loop connector 43 is provided for returning a 200 series interface signal line regulated by the V.24 of a CCITT. A test means built in the communication control equipment 41 is operated according to the test program and when the connector 43 is used, the operation of the NCU interface is confirmed by the test program. Thus, while improving the quality of the test, time for testing the NCU interface is shortened and the required equipments are reduced.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to computer data communication, and in particular to an NCU interface (NCU) connected to a communication control device to which a network control device (hereinafter referred to as NCU) can be connected. t, l control unit, and a line (interface signal line) between the NCU control unit and the NCU.) Concerning the test method.

(Prior Art) The NCtJ control unit and NCIJ in a communication control device are logically based on CCITT's V. 200 defined in 24 standards
Connected via series interface. FIG. 2 shows a connection example when connecting to a network using NCLI, which is a communication control device. In the figure, the modem control section 5 in the communication control device 1 is connected to the network using NCLI, which is a communication control device. The modem 3 is connected to the modem 3 via a 100 series interface of the X.24 standard. Also,
The NCU control unit 4 in the communication control device 1 conforms to 2 of the same standard.
Connected to NCU2 via 00 series interface. The NCU2 is then connected to the network. Moreover, the modem 3 is connected to the NCU 2.

Next, a conventional communication control device testing method will be described.

First, the normal sequence for the 100 series interface is shown in Figure 3, so
The 100 series interface was tested by simulating a normal sequence using a signal loop connector (hereinafter referred to as a loop connector) connected as shown in Figure 4.

However, in the case of the 200 series interface, the operating sequence shown in FIG. 5 is used. In the case of the 200 series interface, as shown in Figure 5, there is a complicated operation sequence in which the dial number is sent out according to the handshake.
It has not been possible to obtain a loop connector that can realize a pseudo normal sequence as in the case of the 00 series interface.

Therefore, conventionally, the hardware of the NCU control unit has been tested by actually connecting the necessary equipment as shown in FIGS. 6 and 7.

FIG. 6 is a configuration diagram showing an example of a conventional hardware test method for an NCU control unit.

In the figure, 11 is a communication control device, and the NCU control unit 16 of the communication control device 11 is connected to the NCU 12 via a 200 series interface. Further, the modem control unit 17 of the communication control device 11 is connected to the modem 13 via a 100 series interface, and the modem 13 is further connected to the NCU 12. Also, NC
[J12 is connected to the telephone set 15 via the public network (or exchange) 14.

Under such a configuration, N existing in the communication control device 1
When testing the CU control unit 16, the communication control device 1
1, shown in FIG. 3, transmits a data terminal ready signal from NtL 108 to control modem control section 17 to modem 13.1. NCU1
After connecting to the public network (or exchange) 14 via 2,
The communication control device 11 includes an NCU control section 16. NCU12.
The other party's telephone 15 via the public network (or exchange) 14
The hardware of the NCU control unit 16 was tested by sending a call signal to the telephone 15 of the other party and checking whether or not there was a call.

FIG. 7 is a block diagram showing another example of a conventional hardware test method for an NCU control unit.

In the same figure, 21 is a communication control device, and NCU control units 27 and 29 of this communication control device 21 are respectively 2
NCU22, 23 via 00 series interface
It is connected to the. Modem control section 2 of communication control device 21
8.30 are each connected to modem 24.25 via a 100 series interface, and further connected to modem 24.25 through a 100 series interface.
25 are connected to corresponding NCUs 22 and 23, respectively. NCU22.23 is public network (or exchange) 26
It is connected to the.

Based on this configuration, in order to test the NCU control section 27, the communication control device 21 transmits a data terminal ready signal &l0J3 shown in FIG. 3 to the modem 24 via the modem control section 28. At the same time, the calling signal is sent to the NCU control unit 27. NCU 22° public network (or exchange) 26. N.C.
U23. The call is sent to the modem control unit 39 of the communication control device 21 via the modem 25, and the modem control unit 30 checks whether the call has arrived.

Similarly, in order to test the NCU control unit 29, the communication control bag W21 transmits a data terminal ready signal of the block 108 shown in FIG. NCU control unit 29. NCU23.
Public network (or exchange) 26, NCU 22 . The call is sent to the modem control unit 28 via the modem 24, and the modem control unit 28 checks whether the call has arrived.

As described above, in order to test the hardware of the NCU control units 27 and 29, tests were performed using methods such as calling each other via the public network (or exchange) 26.

(Problem to be Solved by the Invention) However, in the conventional NCU control unit test method described above, when AA type NCUs are used for the NCUs 12, 22 and 24, NCUs, modems, exchanges, etc. for the number of lines are required. , a large amount of equipment is required for simultaneous calling tests of devices accommodating multiple lines. Another problem is that it takes a lot of time to check the bits (DS8-1) of the dial number.

Therefore, the purpose of the present invention is to be able to improve the test quality compared to the conventional method, and further reduce the time and necessary equipment for testing the NCU interface (hardware of the NCU control unit) compared to the conventional method. An object of the present invention is to provide an NCU interface test method with excellent cost performance.

(Means for Solving the Problems) The present invention provides an NCU interface test method for testing the hardware of an NCU interface in a communication control device using a network control device (hereinafter referred to as NCU). C]TT
V. 24, and a test means for testing the NCU interface according to a test program that is provided in the operation program of the communication control device and is run when the connector is used. When the connector is used, the operation of the NCL+interface can be checked by the test program executed by the test means.

(Function) When testing the hardware of the NCU interface (NCU control unit) in the communication control device, connect the connector to the NCU interface. Then, the test means in the communication control device performs a test set in the operation program of the communication control device.
T's V. It is possible to confirm the hardware operation of each of the 200 series interface signal lines defined in 24.

As described above, by using the NCU interface test method according to the present invention, the only equipment required for testing the NCU interface is a simple loop connector for the number of lines.
It is no longer necessary to prepare N CLJs for the number of lines, modems, exchanges, etc. to accommodate all the lines as in the past.

(Example) Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention.

In the figure, a loop connector 43 is connected to an NCU control unit 42 of a communication control device 41.

The loop connector 43 is CCITT's V. It is for folding back the 200 series interface signal line specified in 24, and has a connection configuration as shown in Fig. 8, forming a folding signal group corresponding to Fig. 5. It is now possible to do so. Here, r 202 to 211 in FIG.
, 213, xxx J is "Aim 202~" in Figure 5.
View 211. 213. Compatible with 隘XXX J. Further, in FIG. 1, for convenience of explanation, a case of one line is illustrated.

FIG. 9 is an operational flowchart of the NCU interface test method of the present invention. Figure 1 communication control ammunition W41
There is a test means for testing the NCU interface (NCU control section 42), and this test means operates according to a program as shown in FIG.

In addition, in FIG. 9, "202-211, 213,
xxx J is rNo, 202 to Na21 in Figure 5],
k213.

Compatible with xxx J.

Next, the operation of the NCU interface test method according to the present invention will be explained using FIGS. 1, 8, and 9. Note that the NCU control unit 42 and loop connector 4 in FIG.
The interface signal line connecting 3 is the loop connector 4.
The communication control device 41
The built-in test means operates according to a test program as shown in FIG. That is, the test means outputs a logic "1" signal to the NCU control unit 4 corresponding to the column 202 in FIG.
2. Loop connector 4 via the interface signal line
3 to the terminal 202 shown in FIG. 8 (step S1
). This signal "1" is looped back at the loop connector 43, and the signal "1" is returned from the terminal 203 via the interface signal line and the NCU control unit 42. ) is normal, the signal "1" sent from the test means as described above is looped back at the loop connector 43 and returns (in this case, the signal 203 becomes "1"). If there is an abnormality (failure), the signal "1" sent by the test means will not return to the test means (in this case, the seed 203 is not "1"("0")). Therefore, the test means are
If the corresponding signal "1" of the sent column 202 is looped back, the process moves to step S3, and if it is not looped back, an error is displayed for the column 203 on the display section (not shown). Step S2). Next, when the test means sends out a logic "1" signal in response to the block 204, the NCU
When the interface is normal, the signal “1”
U control unit 42. Interface signal line, terminal 204 of loop connector 43, terminal 206 of loop connector 43.
It returns to the test means via the ink face signal line and the NCU control unit 42. At this time, step S4
206 becomes "1", and the process moves to step S5.

If the signal "1" sent out from the test means is not returned, the output 206 in step S4 will not become "1", so an error message will be displayed on the display for the block 206. Thereafter, the test means similarly executes the test program shown in FIG. 9.

As described above, when the test program is executed by the test means, if there is no abnormality in the NCU interface, the NCU interface will operate according to the time chart shown in FIG. Therefore, it is possible to operate the hardware for each signal line in relation to the error display displayed on the display unit.

Further, the test program (the program shown in FIG. 9) by the test means exists in the operation program of the communication control device 41, and operates according to the operation flowchart of the communication control device 41 shown in FIG. 11 at the time of system startup. , there is no need to load a new program every time you test. However, each time the test, loop connector 4
It goes without saying that 3 should be connected. In addition, referring to FIG. 11, when the test is not performed in step Sll, the test is performed in step S12, and when the test is completed, the process moves from step S12 to step S13 to start operation.

Also, according to the above NCU interface test method,
Settings for all sending and receiving patterns (e.g.
Patterns that are normally impossible (such as the circuits related to the magnetic field 204 and the magnetic field 205 turning on at the same time as shown in FIG. 5) are possible depending on the test program executed by the test means, so N
Sequences such as abnormalities in the CU, exchangers, connector coats, etc. can be easily simulated.

Furthermore, when determining the test mode in the flowchart of FIG. 11 (step S12 in FIG. 11), unused bins (for example, 8 bins) on the connector are used as shown in FIG. Since the attachment of the loop connector 43 is determined by the terminal corresponding to the 8 bins on the side of the unit 42 changing from logic "1" to logic "0", there are fewer setting errors during testing and operation.

As can be seen from the above explanation, the only device required to test the hardware of the NCU control unit 42 is a simple loop connector 43 for the number of lines, and unlike the conventional
It is no longer necessary to prepare a switch to accommodate the CU, modem, and all lines, and therefore, while improving test quality compared to the past, the time and equipment required for hardware testing of the NCU control unit 42 can be significantly reduced compared to the past. can.

The present invention is not limited to this embodiment, and various applications and modifications can be made without departing from the gist of the present invention.

(Effects of the Invention) As described above, by using the present invention, the following various effects can be obtained.

(1) The equipment required for testing the NCU interface is:
There is only a simple loop connector for the number of lines, and there is no need to prepare NCUs, modems, and exchanges to accommodate all the lines as in the past. The time and equipment required for testing the NCU interface can be significantly reduced compared to the conventional method.

(2) By devising a test program by the test means, it is possible to simulate abnormalities in the NCU, exchange 1 connector cord, etc., so it is also possible to test hardware operation in the event of an abnormality.

(3) The operation program (test program) by the test means exists in the operation program of the communication control device,
Since the test mode is automatically determined, it is easy to test the hardware when a failure occurs during operation, and the time required to detect the failure location can be shortened.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is an explanatory diagram showing a connection example when a communication control device is connected to a network using an NCU, and Fig. 3 is a case of a 100 series interface. Figure 4 is a diagram showing the connections within the loop connector, Figure 5 is a diagram showing the operation sequence for the 200 series interface, and Figure 6 is an example of the conventional NC[J interface test method. FIG. 7 is an explanatory diagram showing another example of the conventional NCU interface test method, FIG. 8 is a diagram showing an example of connection of the loop connector 43, FIG. 9 is an operation flowchart of the test means, and FIG. The figure shows a sequence when the 200 series interface is normal, FIG. 11 is an operation flowchart of the communication control device according to the present invention, and FIG. 12 is an explanatory diagram showing a loop connector attachment determination circuit. 41... Communication control device, 42... NCU control unit, 4
3...Loop connector. Patent applicant Oki Electric Industry Co., Ltd.

Claims (1)

[Claims] In an NCU interface test method for testing the hardware of an NCU interface in a communication control device using a network control device (hereinafter referred to as NCU), a V.
24, and a test means for testing the NCU interface according to a test program that is set in the operation program of the communication control device and is run when the connector is used. . An NCU interface test method, characterized in that when the connector is used, the operation of the NCU interface is confirmed by the test program executed by the test means.