JPS62260450A - Data line terminating equipment and testing instrument for intra-office line terminating equipment - Google Patents

Abstract

PURPOSE:To easily detect abnormal by conducting a test in a state of connecting an intra-office line terminating equipment and a data line terminating equipment. CONSTITUTION:A test controller 160 controls a testing signal transmission part 111 and a response inspection part 130 in a pseudo switchboard 110 and a start detector 151 and a starter 152 in a pseudo data terminal equipment 150 through a control circuit 140 in the pseudo switchboard 110 and a control circuit 153 in the pseudo data terminal equipment 150. Receiving the test results from the control circuits 140 and 153, said controller 160 monitors the state between the intra-office line terminating equipment and the data line terminating equipment, both of which are connected in one-to-one correspondence, detects the error of the information bits between the intra-office line terminating equipment and the data line terminating equipment, and measures the time(starting time) until a bus between both equipments are established after the intra-office line terminating equipment or the data line terminating equipment is started. Thus, the operation state between the intra-office line terminating equipment and the data line terminating equipment can sufficiently be inspected.

Description

[Detailed Description of the Invention] [Summary] In order to test an in-office line termination device and a data line termination device in a connected state, a quasi-infrared switch that generates a test signal and performs a test using a returned signal is provided. , a test device comprising a pseudo data terminal device that simulates the operation of a data terminal, and a test control device that controls these pseudo exchanges and pseudo data terminal devices and receives and processes test data from the pseudo exchange and the pseudo data terminal device. was configured.

[Industrial application field]

The present invention relates to a device for inspecting a combination of an intraoffice line termination device and a data line termination device provided in an office for connecting a subscriber's data terminal to an exchange.

[Conventional technology]

Conventionally, the intra-office line termination device and the data line termination device have been tested independently, but they have not been tested in combination.

[Problem that the invention seeks to solve]

With the conventional testing method as described above, it is extremely difficult to sufficiently test the operating state of a combination of an in-office line termination device and a data line termination device.

[Means for solving problems]

As shown in the principle diagram of FIG. 1, the test device according to the present invention has the following features:
In order to test the device under test 101 in which the in-office line termination device 102 and the data line termination device 105 are connected, a test signal sending unit 111 including a test channel generator 112 and a start bit generator 121, and a channel tester are used. 131, a response tester 130 including a startup tester 137, a control circuit 140 that controls these test signal sending parts and response testers and sends out test results; A pseudo data terminal device 150 consisting of a control circuit 153 that controls the activation detector and the starter and sends out the test results; A test device was configured with a test control device 160 for processing and outputting.

[For production]

The device under test 101 has a switch interface 103 and
In-office line termination section 1051.1052------
105n, and n data line termination devices 1031, 1032, . The pseudo data terminal device 150 performs operations such as returning various types of information from the exchange side, responding to calls from the exchange, and recognizing calls from the data line termination device 105, which are operations performed through the exchange interface 103 of the line termination device 102. performs calling to the data line terminating device 105 and recognizing an incoming call from this data line terminating device.

In order to perform the above test, the test control device 160 transmits the test signal sending section 111 and response checking section 130 of the pseudo exchange 110, the pseudo data via the control circuit 140 of the pseudo exchange 110 and the control circuit 153 of the pseudo data terminal device 150 Activation detector 151 and activation device 15 of terminal device 150
2 and these control circuits 140.153
(1) monitor the status between the in-office line terminating device and the data line terminating device; (2) detect errors in information bits between the in-office line terminating device and the data line terminating device; (3) The time (start-up time) from the start of the in-office line termination device or the data line termination device to the establishment of a path between these devices is measured.

More specifically, the test signal sending unit 1 of the pseudo exchange 110
11 allocates a test channel signal consisting of a simulation information section from a test channel generator 112 and a control section including designation of a turning point and test contents to a channel to be tested in a frame, and also assigns a test channel signal consisting of a simulation information part from a test channel generator 112 and a control part including designation of a turning point and test contents to a channel to be tested in the frame, and The activation bit from the activation bit generator 121 corresponding to 1 is assigned to a predetermined bit position of a channel that is only activated or non-activated in the signal frame, and is sent to the device under test 101.

First, to describe the test of the device under test using the test channel signal, the simulated information portion returned from the local line termination device 102 or the data line termination device 105, which is the return point designated by the control unit of the test channel. The signal consisting of a status part indicating the status of the device under test 101 is sent to the channel checker 131 of the response checker 130 of the pseudo exchange 110 to check whether the simulated information matches that at the time of transmission and the status of the equipment, for example, within the station. Establishment of synchronization of the line termination device 102, etc. is checked.

In addition, the start bit generator 121 of the test signal sending unit 111
The activation status bit indicates activation/non-activation of the device activated by the activation bit signal sent from the device.
7 can be tested.

Furthermore, the starter 152 of the pseudo data terminal device 150 makes a call to the data line termination device 105 similar to the call made from the data terminal, and this activation causes the voltage returned from the data line termination device 105 to become regulated. from the control circuit 153 and the control circuit 1 of the pseudo exchange 110 by detecting whether the value has been reached by the activation detector 151.
40 to the test control device 160 for processing and testing.

These controls are carried out from the test control device 160 to the pseudo exchange 1.
The test result detected by the pseudo exchange 110 is sent to the test control device 160 to identify the state of the device under test 101.

〔Example〕

FIG. 2 shows an embodiment of the present invention, and the reference numerals given to each component are shown as the numbers given by subtracting 100 from the reference numerals given to the corresponding components in FIG. The shown device under test corresponds to the device under test shown as 101 in FIG. The same is true.

FIG. 3(a) shows an example of the structure of a signal sent from a pseudo exchange to a device under test according to the present invention, and each channel constituting a frame has an information section indicating information and a control section indicating control information. Each channel of the signal specified by this control information, looped back to the in-office line termination device or data line termination device, and received by the pseudo exchange, is configured as shown in (b) of the same figure. It consists of an information section that shows information returned by the device and a status section that shows the status of the device. In addition, the information part in the channel sent out from this pseudo exchange and the channel received,
The control section and the status section can each be 8 bits, so in this example each channel consists of 16 bits.

In FIG. 2, the device under test 1 connects the in-office line termination units 41.42-...--4n of the in-office line termination unit 2 and the same number of data line termination units 51.52-...-5n to each other. Tests are conducted by selectively connecting using the selective connection board 6, which is manually switched and connected, and the test results are sent to the in-office line terminals 41 and 42.
... It is determined based on -4n.

The test contents include, for example, start-up time measurement (START)
, information bit error measurement (ERORR), activation/deactivation repetition test (CYCLE), random activation/deactivation repetition test (RND), non-activation state test (NO
P), startup state test (OP), etc. (The code in parentheses indicates the test content). These test contents are specified by the control section of each channel of the test signal sent from the pseudo exchange 10.

This test signal control unit also specifies the return position, for example, the in-office line termination unit 4 or the data line termination unit 5, and from these return points, test results corresponding to the above test items are transmitted to the test signal control unit. is sent back to pseudo-exchange Ia10 by a state section occupying a position on the channel corresponding to .

The pseudo exchange 10 includes a test signal sending section 11, a test signal receiving section 30, and a control circuit 40, and the test signal sending section 11 includes a test channel generator 12, a start bit generator 21, and a frame generating circuit 24. .

This test signal sending unit 11 generates the information part of the test signal by an information pattern generator 14 and its control part by a control bit generator 15, respectively, and sets the test signal to a predetermined channel position by a channel selector 16 as shown in FIG. A test signal generating section 131 .
132 .
The outputs of -...--130 are combined.

Further, for a channel to be tested only for a start-up test, a start-up bit generation section 21 is provided which inserts a start-up bit of a control section of a test signal for a channel to be tested on a frame via a bit selector 23. The transferred signal and the signal from the activation bit generation section 21 are combined by the frame generation circuit 24 to form a frame, which is sent to the device under test 1 as a test signal. The number of test channel generators 13, therefore the sum of the number of channels generated by the test channel generator 13 and the number of channels into which test bits are inserted from the activation bit generator 21 is the number of channels in one frame. It is also desirable that the number n of intra-office line termination units 4 and, therefore, the number n of data line termination units 5 be equal to n.

The in-office line termination device 2 of the device under test 1 receives the test signal frame and allocates predetermined channels from the exchange interface 3 to the in-office line termination units 4s, 42--40. , from the exchange interface 3 of the intra-office line termination device 2 to this intra-office line termination section 4s, 42.
-・-・-4n and data circuit wA termination device 5s, 52
The data is transferred to the data line termination bag W5 via the selection connection board 6, which manually switches the combination of .--5n.

If there is no abnormality in the path from the pseudo exchange a10 to this pseudo data terminal device 50, the voltage detection circuit 51 of this pseudo data terminal device detects this starting voltage and transmits the detected voltage to the control circuit 53 in the pseudo data terminal device. This control circuit sends the test data to the test control device 60.

If, in order to test the functions within the device under test 1, the test signal from the pseudo exchange ``0'' is looped back through the data line termination devices 51. When specified by the control section of this test signal, the data line terminating device 5 performs the operation specified by the control section of this test signal, and returns the operating state using the status section of the return signal shown in the third column.

In addition, when this in-office line terminating device is specified as a loopback point in order to test the function of the in-office line terminating device 2, this in-office line terminating device performs the operation specified by the control section of the test signal, and its operating state is The return signal is returned to the pseudo exchange IO according to the status part of the return signal shown in FIG. 3(b).

Note that the combination of the in-office line termination units 41.42.--.--4n and the data line termination devices 51.52.--.5n is appropriately selected by the selection connection board 6. The test result is 41.42...--
- As described above, it can be obtained based on -4n.

As described above, the return signal sent back from the data line termination device 5 or the in-office line termination unit 4 is transmitted to the pseudo exchange 10.
In the response signal receiving section 30, the received signal is distributed by the receiving circuit 28 to the demultiplexer 29 of the channel tester 31 and the bit decoder 38 of the activation tester 37.

This demultiplexer 29 selects the channels corresponding to the channels from which the test signal was sent from the test signal sending section 11, and the state receiving sections 321, 322, and 321, 322, 322,
The channel decoder 33 of each status receiving section 32 supplies the information part of this received information to the information error detector 34 and the status part to the status bit detector 35, respectively.

The information error detector 34 detects the transmitted information by, for example, comparing the information pattern sent from the information pattern generator 13 of the test signal sending unit 12 to the device under test 1 with the information pattern of the information part of the received signal. The status bit detector 35 checks whether there is an error, and also identifies the operational status of the device under test based on the status part of the received signal. The timer 36 measures the time it takes for 1 to complete the specified operation to test its response speed.

On the other hand, the via decoder 38 sends the status bit from the device in the device under test 1 corresponding to the channel that sent the activation test bit from the test signal sending unit 11 to the activation status bit detector 39, and activates the device. Inspect condition.

As mentioned above, the test results obtained from the response test section 30 and the voltage detection circuit 51 of the pseudo data terminal device 50 are transmitted from the respective control circuits 40 and 53 to the test control device 6.
0 is sent to the control device 61 for processing, and then sent to the console 62
The test results are displayed or printed using the input/output device shown as .

The following table shows an example of the operation mode of the in-office line termination device-data line termination device system during the test, and the contents of the operation mode are as follows.

5TART Activation time measurement ERROR Information bit error measurement CYCLE RND which periodically repeats activation and non-activation states NOP which randomly repeats activation and non-activation states Non-activation state OP Activation state 101 is the device under test, 102 is the internal line Terminal device, 10
5 is a data line terminal device, 110 is a pseudo exchange, 111
112 is a test signal transmitter; 112 is a test channel generator; 12
1 is an activation bit generator, 130 is a response checker, 131 is a channel tester, 137 is an activation checker, 140 is a control circuit, 150 is a pseudo data terminal device, 151 is an activation detector, 152 is a starter, 153 is a The control circuit 160 is a test control device.

Claims (1)

[Claims] A test channel generator (112) and an activation bit generator (112)
21), a response tester (130) including a channel tester (131) and a startup tester (137), and a control circuit (140). ), activation detector (151) and activation device (
a pseudo data terminal device (150) including a control circuit (152) and a control circuit (153); and a pseudo data terminal device (150) that controls the pseudo switch and the pseudo data terminal device, and accepts test results from the control circuit of the pseudo switch and the pseudo data terminal device. test control equipment (160
), and a line termination device within the station under test (1
02), a device under test (
101) is a data line characterized in that the in-office line terminating device is connected to the above-mentioned pseudo exchange via the exchange interface (103), and the data line terminating device is connected to the above-mentioned pseudo data terminal device to perform inspection. Test equipment for terminating equipment and in-office line terminating equipment.