KR20010045733A - Apparatus for testing signal and service circuit in an exchange - Google Patents

Abstract

PURPOSE: An apparatus for testing signaling and service circuits in an exchange is provided to implement a subscriber and inter-office signaling device and teleconference and announcement service blocks through a single test apparatus and to execute a loop-back function to internal and external paths in testing a signaling device. CONSTITUTION: An apparatus for testing signaling and service circuits in an exchange is composed of an operator terminal(100) and a test block(200). The operator terminal(100) displays a relevant item among test items for a signaling device(208) or teleconference and announcement service blocks(210,212). The test block(200), testing an object under test, is provided with a control unit/DLS(Digital Link Concentrator)(202), a clock generation/test object selection part(204), and an A/D conversion unit(206). A selection switch(d) in the clock generation/test object selection part(204) selects an object to be tested. The control unit/DLS(202) checks whether the signaling device(208) is installed and executes initializations for an automatic test according to a test method selection result received from the operator terminal(100). If the signaling device(208) is initialized by the control unit/DLS(202) and then a DTMF digit signal is transmitted to the clock generation/test object selection part(204), a transmit-receive test for the DTMF digit signal is carried out. The clock generation/test object selection part(204) transmits the DTMF digit signal to the selected object(208) to be tested and transfers a PCM signal sent from the selected test object(208) to the control unit/DLS(202) through an SHW(f). At this moment, the control unit/DLS(202) loops back the received DTMF digit signal through SHWs(a,f).

Description

Signal and service circuit tester of exchanger {APPARATUS FOR TESTING SIGNAL AND SERVICE CIRCUIT IN AN EXCHANGE}

The present invention relates to a test apparatus for a signal circuit and a service circuit of an exchange, and more particularly, to a test apparatus for testing subscriber and station signaling devices and conference call and announcement service.

Typically, exchanges use test devices to test the subject under test, such as subscriber and station signaling devices, conference calls, and announcement services. Such a test apparatus is shown in FIG. 1, with an operator terminal 10, an object under test, for example, the signaling device 27 of FIG. 1A, the conference call service block 28 of FIG. 1B, and the guidance of FIG. 1C. A test block 20 for testing the broadcast service block 29 is provided.

The test block 20 includes a control unit 21, a clock generator 23, and an A / D converter 25.

First, referring to FIG. 1A, a process of testing a subscriber and an inter-station signaling device as an object under test will be described in detail.

After the tester turns on the power of the operator terminal 10 and selects a test item for the signal device 27 under test by using a selection switch (not shown) in the clock generator 23. In this case, the test on the signal device 27 to be tested is automatically performed.

The test items for the subscriber and inter-station signaling devices include automatic test and additional test. The automatic test items are not only dual tone multi frequency (hereinafter abbreviated as DTMF) digit signal but also forced signal method. R2-Multi Frequency Compelled (hereinafter abbreviated as R2-MFC) signal and Continuity Check Tone (hereinafter abbreviated as CCT) and audible tone are included. The tests for all items are performed in the same way as the tests with DTMF digit signals.

The investigator selects one of the test method selection screens displayed on the operator terminal 10, that is, the test method for the automatic test or the item test. The test method selected from the operator terminal 10 is then transmitted to the control unit 21 in the test block 20.

The control unit 21 checks whether or not the signal device 27 is mounted according to a test method received from the operator terminal 10, for example, automatic test selection, and performs initialization for automatic test. Here, the initialization operation for the automatic test includes a restart of the signal device 27 under test, and various count values including register initialization and gain values of the A / D converter 25. Initialize

After the signal device 27 is initialized by the control unit 21, the control unit 21 transmits a DTMF digit signal to the signal device 27, thereby performing a transmission / reception test on the DTMF digit signal.

The signal device 27 internally loops back the DTMF digit signal received from the controller 21 and stores the looped signal in a memory (not shown). Thereafter, the controller 21 reads the loop back signal stored in the memory in the signal device 27, and then transmits the read loop back signal to the operator terminal 10, and the operator terminal 10 checks the tester. Display the loop back signal to determine if it is normal.

On the other hand, after the automatic test is completed, an additional item test on the signal device 27 is performed.

As an example, when a tester inputs a predetermined telephone number using the telephone A, an analog signal corresponding to the input number is transmitted to the A / D converter 25. The A / D converter 25 converts an analog signal into a digital signal and transmits it to the signal device 27. The signal device 27 reads the digital signal received from the A / D converter 25 and stores it in a memory (not shown) in the signal device 27. Thereafter, the control unit 21 reads the signal stored in the memory in the signal device 27, and then transmits the read signal to the operator terminal 10, and the operator terminal 10 transmits the signal for the tester to confirm. Display to read if it is normal. In addition, under the control of the control unit 21, the signal device 27 transmits the DTMF digit signal to the A / D conversion unit 25. The A / D converter 25 converts the digital signal into an analog signal and transmits it to the telephone A. The tester listens to the digital signal through the telephone A to determine whether the digital signal is normal.

1B shows an item testing process for conference call service block 28. As in the test procedure performed in FIG. 1A, when the tester selects an item test from the test method selection screen displayed on the operator terminal 10, the selection result is transmitted to the controller 21.

The control unit 21 transmits a command to transmit a test signal to the conference call service block 28 to perform a test on the conference call service block 28 according to the item selection result received from the operator terminal 10.

The conference call service block 28 connects to a group of telephones A, ... for a multi-party call via the A / D converter 25 according to a test signal transmission command from the controller 21. In this state, as a conversation between examiners using telephones (A, ...), the conference call service test is performed.

1C illustrates an item test procedure for the announcement service block 29. As in the test procedure performed in FIG. 1A, when a tester selects an item test from the test method selection screen displayed on the operator terminal 10, the selection result is transmitted to the controller 21.

The control unit 21 transmits a command to transmit a test signal to the announcement service block 29 to perform a test on the announcement service block 29 according to the item selection result received from the operator terminal 10.

The announcement service block 29 connects to the telephone A for announcement broadcasting through the A / D converter 25 in response to a command to transmit a test signal from the controller 21. In this state, the announcement service block 29 transmits the announcement to the examiner using the telephone A, and the examiner receives the above-described announcement through the telephone A, and the announcement service test is normally performed. Determine if you can.

As described above, the prior art test block 20 is a separate test having different functions for testing each signaling device 27, conference call service block 28, announcement service block 29, and the like. There was a problem that caused a waste of resources because of the use of the device.

In addition, in the automatic test for the signal device 27, only the loop back function for the internal path was performed, and the loop back function to the external path could not be performed. In particular, in the above-described test apparatus 20 of the prior art, the item test was able to complete all the tests collectively only after additionally performing the item test after performing the automatic test once.

Accordingly, the present invention has been made to solve the above problems, the object of which is to implement a signaling device between the subscriber and the station, the conference call and announcement service block, etc. in one test device, in the test for the signal device, It is to provide a signal and service circuit test apparatus of an exchange to perform a loopback function to internal and external paths.

Signal and service circuit test apparatus of the exchange in the present invention for achieving this object is an operator terminal for displaying the test method and test menu information for the object under test; A control unit and a digital link concentrator for transmitting a test performance signal to the test object and looping the test performance signal transmitted from the test object to the test object according to the selection of the test method and test menu information displayed on the operator terminal; It includes a clock generator and a test object selection unit for selectively connecting the selected control unit and the digital link concentrator on the operator terminal to provide a loop path.

1 is a block diagram of a signal and service circuit test apparatus of a conventional exchanger,

2 is a block diagram of an apparatus for testing a signal and service circuit of an exchange according to the present invention.

<Explanation of symbols for main parts of drawing>

100: operator terminal

200: test block

202: control unit and digital link concentrator

204: clock generation and test target selection unit

206: A / D converter

208: Signal device

210: Conference Call Service Block

212: announcement service block

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation of the present invention.

2 is a block diagram of a signal and service circuit test apparatus of an exchange configured according to the present invention, which includes an operator terminal 100 and a test block 200 for testing an object under test, and the test block 200. Includes a control unit and a digital link concentrator (hereinafter, abbreviated as DLC) 202, a clock generation and test object selection unit 204, and an A / D conversion unit 206.

The operator terminal 100 displays a test item for the block under test, for example, the signal device 208 or the conference call and announcement service block 210, 212, that is, the corresponding item during the automatic test or the item test. The test item is sent to the test block 200 by a keyboard.

The selection switch d in the clock generation and test object selection unit 204 selects an object under test. For example, when one of the test targets is selected by fixing the signal device 208 or the conference call and announcement service service blocks 210 and 212 to a position (for example, the signal device 208), the controller is controlled. And SHW (a, f) between the DLC 202 and the signal device 208.

The control unit and the DLC 202 in the test block 200 check whether the signal device 208 is mounted according to the test method selection result received from the operator terminal 100, and perform initialization for automatic testing. The initialization operation for the automatic test includes a restart of the selected block to be tested 208 and initializes various coefficient values including register initialization and gain values of the A / D converter 206.

After the signal device 208 is initialized by the control unit and the DLC 202, the DTMF digit signal is transmitted to the clock generation and test target selection unit 204, thereby performing a transmission / reception test on the DTMF digit signal.

The clock generation and test target selection unit 204 transmits the DTMF digit signal provided from the control unit and the DLC 202 to the selected test target 208 and transmits the PCM signal transmitted from the test target 208 to the SHW (f). ) To the control unit and the DLC 202. At this time, the control unit and the DLC 202 loop the DTMF digit signals received from the signal device 208 through the SHW (a, f) again through the SHW (a, f).

On the other hand, the signal device 208 transmits the DTMF digit signals received from the control unit and the DLC 202 to the control unit and the DLC 202 through the SHW (a, f). Then, the DTMF digit signal loops back through the control unit and the DLC in the DLC 202 via the SHW (a, f). In addition, the signal device 208 determines whether the DTMF digit signal looped back and the DTMF digit signal received from the control unit and the DLC 202 are identical to each other, and the result thereof is stored in the memory (in the signal device 208). (Not shown).

Thereafter, the control unit and the DLC 202 read the determination result stored in the memory in the signal device 208 and transmit it to the operator terminal 100. The operator terminal 100 displays the determination result for the examiner to confirm.

Next, transmit / receive test is performed for R2-MFC signal and CCT by forced signaling. That is, the control unit and the DLC 202 transmit the R2-MFC signal and the CCT to the signal device 208 through the SHW (a, f) selected by the selection switch d in the clock generation and test object selection unit 204. . At this time, the control unit and the DLC 202 loop the R2-MFC signal and CCT received from the signal device 208 through the SHW (a, f) again through the SHW (a, f).

The signal device 208 transmits the R2-MFC signal and CCT received from the control unit and the DLC 202 to the control unit and the DLC 202 through SHW (a, f). Then, the R2-MFC signal and the CCT loop back through the control unit and the DLC in the DLC 202 through the SHW (a, f). In addition, the signal device 208 determines whether or not the R2-MFC signal and CCT looped back and the R2-MFC signal and CCT received from the control unit and the DLC 202 are the same, and signals the result of the determination. Store in memory in device 208.

Thereafter, the control unit and the DLC 202 read the determination result stored in the memory in the signal device 208 and transmit it to the operator terminal 100. The operator terminal 100 displays the determination result for the examiner to confirm.

Next, as a transmission test for an audible tone, the control unit and the DLC 202 use a specific pattern through the SHW (a, f) selected by the selection switch d in the clock generation and test object selection unit 204. Data is sent to the signal device 208. At this time, the control unit and the DLC 202 loop the specific pattern data received from the signal device 208 through the SHW (a, f) again through the SHW (a, f).

The signal device 208 transmits specific pattern data received from the control unit and the DLC 202 to the control unit and the DLC 202 through SHW (a, f). Then, the specific pattern data loops back to the control unit and the DLC in the DLC 202 through the SHW (a, f). In addition, the signal device 208 determines whether the specific pattern data looped back and the specific pattern data received from the control unit and the DLC 202 are identical to each other, and the determination result thereof is stored in the memory in the signal device 208. Store in

Thereafter, the control unit and the DLC 202 read the determination result stored in the memory in the signal device 208 and transmit it to the operator terminal 100. The operator terminal 100 displays the determination result for the examiner to confirm.

As described above, after the automated test on the signal device 208 is completed, the investigator wants to test from a menu displayed on the operator terminal 100 to select the next test object to be tested, for example, a meeting. If call service block 210 is selected, and the examiner then selects a test item displayed on operator terminal 100, the selected conference call service block 210 and test item are sent to test block 200 by keyboard. do.

The control unit and the DLC 202 in the test block 200 sends a signal transmission command to the conference call service block 210 through the SHW (b, f) according to the result of the item selection received from the operator terminal 100, thereby Perform a test on the call service block 210.

The conference call service block 210, which has received a signal transmission command from the control unit and the DLC 202, connects to the telephones A, ... of the group for the multi-party call through the A / D conversion unit 206. In this state, as a conversation between examiners using a group of telephones (A, ...), a conference call service test is performed.

On the other hand, after the test on the conference call service block 210 is completed, the examiner wants to test from the menu displayed on the operator terminal 100 in order to select the next subject under test, for example, an announcement service. After selecting block 212, the tester then selects a test item displayed on the operator terminal 100, and the selected announcement service block 212 and test item are transmitted to the test block 200 by the keyboard.

The control unit and the DLC 202 in the test block 200 are guided by transmitting a signal transmission command to the announcement service block 212 through the SHW (c, f) according to the result of the item selection received from the operator terminal 100, Perform a test on the broadcast service block 212.

The announcement service block 212 receiving the signal transmission command from the control unit and the DLC 202 connects to the telephone A for announcement broadcasting through the A / D converter 206. In this state, the announcement service block 212 transmits the announcement to the tester using the telephone A, and receives a response message from the tester again, thereby performing the announcement service test.

The present invention as described above implements the signaling device between the subscriber and the station, the conference call and the announcement service block, etc. in one test device, and performs the loop back function to the internal and external paths in the test of the signal device. As a result, the quality of the test apparatus can be improved, and the cost reduction can be expected.

Claims (1)

In a batch test apparatus of a plurality of test subjects in an exchanger, An operator terminal configured to display a test method and test menu information on the test object; A control unit and a digital link that transmits a test performance signal to the test object and loops the test performance signal transmitted from the test object to the test object according to the selection of the test method and test menu information displayed on the operator terminal. Concentrator; And a clock generation and test object selection unit selectively connecting the control unit and the digital link concentrator selected on the operator terminal to provide a loop path.