JPH0257758B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a digital multi-frequency signal test method, and more particularly, to a digital multi-frequency signal test method for testing the transmitting and receiving functions of a digital multi-frequency signal device of a time division telephone exchange. Regarding.

(Prior Art) In a time-division telephone exchange, the multi-frequency signal device used for transmitting and receiving numeric information between stations is digitized. Conventionally, tests to confirm the normality of the digital multi-frequency signal equipment's numeric sending and receiving functions as an exchange have been conducted from a test stand for the purpose of confirming the functions of various hardware and software installed in the exchange. It is running. However, in known telephone exchange software, the numeric information input to the central processing unit is translated into numbers for the telephone exchange, so if the information is not input using a numbering plan that matches the equipment conditions of the telephone exchange, it will result in non-contact processing. I get used to it. Generally speaking, when testing multi-frequency signal equipment, there is no need to worry about the numbering plan.
If it is a sending function, it is necessary to check the frequency that corresponds to the number, the sending level, etc., and if it is a receiving function, it is necessary to check the reception level, signal recognition time, signal interval, etc. In particular, when checking the receiving function, since the standard range of the transmitting function of the other station has a specified width, it must operate normally under any conditions within the specified range. In order to test these functions, a multifrequency signal that is variable within a specified range must be sent to the multifrequency signal receiver.
In this way, in order to confirm the normality of the multi-frequency signal transmission/reception function, although the test is performed using a telephone exchange, it is necessary to perform the test independently of the telephone exchange processing. Furthermore, in the case of a digital multi-frequency signal device, since the partner station is not necessarily a digital telephone exchange, the normality of the telephone exchange must be confirmed even when the analog signal is converted. However, the conventional multi-frequency signal device testing method conducted from a test stand has the disadvantage that it is not possible to perform tests that satisfy the above-mentioned requirements.

(Object of the Invention) The present invention has been made to eliminate the above-mentioned drawbacks, and its purpose is to test the transmitting and receiving functions of the digital multi-frequency signal device of a time-division telephone exchange. An object of the present invention is to provide a digital multi-frequency signal device testing method that allows testing any signal device from a test stand with any numerical information and any operating conditions, regardless of exchange processing.

(Structure of the Invention) According to the present invention, in a time division telephone exchange,
A test interface device that exchanges test information between a test stand and a central processing unit, a test trunk that connects the test stand to a main exchange switch, and a test trunk that is connected to the test stand via the test trunk and the main exchange switch. and a digital multi-frequency signal device, and when testing the multi-frequency signal sending function, test numbers are sent from the test stand to the central processing unit via the test interface device and controlled by the central processing unit. A digital multi-frequency signal from the digital multi-frequency signal device is received by the test stand via the exchange main switch, and when testing the receiving function, the digital multi-frequency signal is received from the test stand via the exchange main switch. A digital multi-frequency signal device, characterized in that the test numbers are sent to the signal device as a digital multi-frequency signal, and the test numbers received by the central processing unit are sent to the test stand via the test interface device. A test method is obtained.

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

FIGS. 1 and 2 are block diagrams for explaining the testing of the sending function and receiving function in an embodiment of the digital multi-frequency signal device testing method of the present invention, respectively. In the figure, the present embodiment has a test stand 1, a test trunk 2 that connects the test stand 1 to an exchange main switch 3, a digital multi-frequency signal device under test 4 accommodated in the exchange main switch 3, and a bus 7. A test interface device 5 is provided for exchanging test information between the test bench 1 and the central processing unit 6 via the test stand 1 and the central processing unit 6.

In Figure 1, test stand 1 is used for testing the sending function.
From there, instructions for testing the sending function of the digital multi-frequency signal device and the device number of the signal device under test are transferred to the central processing unit 6 via the test interface device 5 and the bus 7. The central processing unit 6 controls the exchange main switch 3 based on this information to connect the digital multi-frequency signal device 4 and the test stand 1 via the test trunk 2 and the communication path 30. After the connection is completed, the central processing unit 6 sends a connection completion signal to the test stand 1 via the test interface device 5. After completing the connection, the maintenance personnel will begin the test. Here, the test digits can be arbitrarily set, and although it is possible to send out a plurality of digits in succession, it is also possible to send out one digit at a time. These test numbers are sent from the test bench 1 to the central processing unit 6 via the test interface device 5 and the bus 7. Since the central processing unit 6 recognizes that the received digits are test digits, it simply instructs the digital multi-frequency signal device 4 to send digits without executing digit translation processing, which is a known telephone exchange process. be. The digital multi-frequency signal device 4 sends out a multi-frequency signal according to instructions from the central processing unit 6, and the multi-frequency signal is transmitted to the communication path 3.
0, transferred to the test stand 1 via the test trunk 2. The maintenance person completes the test after confirming that the arbitrarily set test numbers have been properly sent from the digital multi-frequency signal device 4.

Next, in FIG. 2, in the reception function test, the test bench 1 sends instructions to the central processing unit 6 to test the reception function of the digital multi-frequency signal device via the test interface device 5 and the bus 7. The device number is transferred. The central processing unit 6 controls the exchange main switch 3 based on this information to connect the digital multi-frequency receiver 4 and the test stand 1 via the test trunk 2 and the communication path 31. After this connection is completed, the central processing unit 6 connects the bus 7 to the test interface device 5.
A connection completion signal is sent to the test bench 1 via the test stand 1. After the maintenance person identifies that the connection is complete, he begins the test. Here, the test digits can be set arbitrarily, and moreover, it is also possible to send out a plurality of digits in succession or to send out one digit at a time. In addition, the pulse width of the test number signal, the signal level, etc. can be variably set. These test numbers are transmitted from the test stand 1 via the test trunk 2 to the digital multifrequency signal device 4 via the communication path 31 as a multifrequency signal. When the central processing unit 6 receives the digits received by the digital multi-frequency signal device 4, it recognizes that the digital multi-frequency signal device 4 is in the state under test, and therefore performs digit translation processing, which is a known telephone exchange process. Bus 7, test interface device 5 for test stand 1 without execution
It only transfers numeric information via . At this time, the numerical information is transferred by a combination of multi-frequency signals, so that in the event of a fault, the content of the fault can be identified on the test stand 1. The maintenance person completes the test after confirming that the arbitrarily set test numbers have been properly received by the digital multi-frequency signal device 4.

(Effects of the Invention) As explained above, the digital multi-frequency signal device testing method of the present invention uses a telephone exchange in testing digital multi-frequency signal devices. This has the advantage that the frequency signal device can be tested using arbitrary numerical information and arbitrary operating conditions.

[Brief explanation of the drawing]

FIGS. 1 and 2 are block diagrams for explaining the testing of the sending function and receiving function in an embodiment of the digital multi-frequency signal device testing method of the present invention, respectively. In the figure, 1...Test bench, 2...Test trunk, 3...Exchange main switch, 4...Digital multi-frequency signal device, 5...Test interface device, 6...
... Central processing unit, 7 ... Bus, 30, 31 ...
Call path.

Claims (1)

[Claims] 1. In a time-division telephone exchange, a test interface device that exchanges test information between a test stand and a central processing unit, a test trunk that connects the test stand to the main switch, and a test trunk that connects the test stand to the main switch, and a test trunk that connects the test stand to the main switch, and and a digital multi-frequency signal device connected to the test stand, and when testing the multi-frequency signal sending function, transmits test numbers from the test stand to the central processing unit via the test interface device. Under the control of the processing device, the digital multi-frequency signal from the digital multi-frequency signal device is received by the test stand via the exchange main switch, and when testing the reception function, the digital multi-frequency signal from the digital multi-frequency signal device is received via the exchange main switch. A test number is sent as a digital multi-frequency signal from the test stand to the digital multi-frequency signal device, and the test number received by the central processing unit is sent to the test stand via the test interface device. A digital multi-frequency signal device test method.