JPH07135505A - Automatic test method for atm cross connector - Google Patents

Abstract

PURPOSE:To test whether or not connection test is implemented for all of huge cross connect paths of an ATM. CONSTITUTION:At least one signal has the same name as the name of a cross connect path 1-10 (a path from a route 1 to a route 10) among signals passing through the cross connect path 1-10 in figure (a). When the signal with the same name passes the cross connect path 1-10, it is discriminated that the designated signal correctly passes through the pass. As to all cross connect paths 1-10, when at least one signal having the same name passes through a concerned cross connect path among signals passing through the concerned path and the discrimination is made to all the passes, it is confirmed that all signals pass through a designated path.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic test system for performing an automatic test path test on an ATM cross connect device.

[0002]

2. Description of the Related Art In an ATM cross-connect device, one of, for example, 4096 output paths is set for a certain input. Since 4096 kinds of input signals are also supplied to the inputs in such a device, it is necessary to perform 4096 kinds of output tests with respect to 4096 kinds of inputs in order to test the cross-connect device.

In order to carry out this test, conventionally, after the path of the cross-connect device is set, a signal created by a measuring instrument that outputs data with a destination number is supplied to confirm the operation.

[0004]

However, with such a method, it is not possible to detect the state in which a signal that has passed through a path other than the designated cross-connect path is output, and all paths are correctly tested. There was a problem that I did not know whether it was true or not. The present invention has been made in view of such circumstances, and an object thereof is to determine whether or not a correct test has been performed.

[0005]

In order to solve such a problem, the present invention gives attention to at least one of signals passing through a cross-connect path by giving the same signal name as that cross-connect path. When a signal with the same name as the cross-connect path passes through the cross-connect path, it is judged that the cross-connect path has been correctly tested, and when the judgment is made for all cross-connect paths, it is judged that the test has been performed normally. It is something that is done.

[0006]

[Operation] When various cells pass through the designated cross-connect paths while designating a plurality of cross-connect paths, it is confirmed that a signal having the same name as the cross-connect path passes through the cross-connect path of interest. By doing so, it can be determined that the signal has surely passed through the designated cross-connect path.

[0007]

1 is a block diagram showing an embodiment of the present invention in which an ATM cross-connect path tester 100 is an ATM.
FIG. 2 is a diagram for explaining the operation, which is connected to the cross-connect device 200, and shows an example of a cell flow in which idle cells inserted between cells are omitted, and the symbol A ~ M is a cell.

The signal generator 400 changes the signal pattern of the output signal in synchronization with the path setting command of the control device 300 for setting the cross connect path. 1, 2,
3, 10, 20, and 30 indicate respective route names. 2A is a signal of route 1, FIG. 2B is a signal of route 10 output to route 2 via buffer 700, and FIG. 2C is similarly route 3.
2 (d) is a signal of route 30, and FIG. 2 (e) is a signal of route 40. 2 (a)-
The symbols in the frame of (c) are the signal names of the input signals of the routes 1, 2, and 3 described in FIG. 1, for example, “1-1
“0” is the signal name of the signal output from route 1 to route 10.

Symbols outside the frame are set cross-connect paths, for example, "1-10" is a cross-connect path from route 1 to route 10.

In the device thus configured, the signal generator 400 outputs the signal shown in FIG. 2A, and the cross-connect path described above the frame is set as the path of each cell.

In the example of FIG. 2A, for example, the cross-connect paths from cell A to cell C are set from route 1 to route 10 as described in 1-10 at the top of the frame,
Cell A is given the name 1-10 and cell B is 2-
The name 20 is given, and the cell C is given the name 3-30. The other parts are similarly set up with the paths as described and become signals. The signal name is used to detect whether or not the signal has passed through all paths, as described later.

The signal of FIG. 2A, that is, each signal of the cells A to M supplied to the route 1 is delayed by one cell timing according to the cross connect path described above the cell, and each cross connect path is delayed. It is output to the route determined by. That is, since the cross-connect paths of the cells A to C are 1-10, the signals of the cells A to C supplied to the route 1 are output to the route 10 with a delay of one cell timing.

Since the signal of each cell output to the route 10 is given to the buffer 700, it is transmitted to the route 2 through the buffer 700 as shown in FIG. 300 is notified. Since the control device notifies the ATM cross-connect device 200 of this, the signals are output from the cells A to C according to the setting of the cross-connect path described in the upper part of the frame of FIG. 2B.

That is, since the cross-connect paths of cells A to C shown in the upper part of FIG. 2B are set to 2-20, cells A to C are output from route 2 to route 20. And the signal of route 20 is buffer 800
Since it is output to the route 3 via the route, the signal shown in FIG. That is, cells A to C are route 10, route 20, and route 3 as shown in FIGS.
Each time it is output to 0, it is output with a delay of one cell timing. On the other hand, in FIG. 2A, since the cross-connect path of the cell E is set to 1-20, the connection from the route 1 to the route 20 is performed at the timing of the cell E. Since FIG. 2C shows a signal of route 3 (signal of route 20), the cell E shown in FIG.
As shown in FIG. 2C, the cell E is output one cell timing later than that in FIG. 2A, so that the cell E is output next to the cell C.

Since the cross connect path of the cell F of FIG. 2A is set to 1-10, the cell F is delayed by one cell timing as shown in FIG. It is output as F. In this cell F, since the cross-connect path is designated as 2-10 at the upper part of the frame in FIG. 2B, it is output from route 2 to route 10. That is, what is output after passing through the buffer 700 is route 1 again.
It is output to 0. The cell at this time is shown with an underline in order to distinguish it from the cell F.

Since the cross-connect path of the cell F with this underline is designated as 2-30, FIG.
As shown in (d), it is output to the route 30 one cell timing later than the underlined cell F in FIG. 2 (b).

Since the cross-connect path of the cell G of FIG. 2 (a) is designated as 1-30, as shown in FIG. 2 (d), one cell timing is delayed from the cell G of FIG. 2 (a). It is output to the route 30.

In the following, cells H to L are also shown in FIG.
It is output to the route 30 as shown in (d). At this time, passing through the buffer 800 while being output from the route 20 to the route 3 is the same as the description of the buffer 700 described above.

The signal of the route 30 output in this manner is rearranged by the rearrangement circuit 600 to generate the original signal generator 400.
It is possible to determine whether or not the signal that has passed through the cross-connect path is correct by rearranging in the order output from the above and comparing by the comparison circuit 500.

In this way, an arbitrary path can be set according to the way of instructing from the control device 300.
Even if the signal output from the route 30 matches the signal output from the signal generator 400, it cannot be known whether all the set paths have been correctly passed. Therefore, this device is devised as follows.

That is, at least one signal passing through each cross-connect path has the same name as that cross-connect path, as indicated by a black triangle in the upper left of the frame of FIG. Then, when a signal having the same name passes through the cross-connect path, it is surely determined that the signal has passed through the path.

For example, in the example of FIG. 2A, the signal name of the cell A is 1-10, and this signal is the cross-connect path 1-.
When it is determined that the vehicle passes the route 10, the route from the route 1 to the route 10 is determined to be correctly tested. This judgment may be made by the ATM cross-connect device 200, or the information may be passed to the control device 300 and made there.

In this way, cell E,
If G is given the signal names 1-20 and 1-30, respectively, it is possible to know whether or not the test was correctly performed from the route 1 to the routes 20 and 30. Similarly, FIG.
In the case of, if cells B, F, and H are designated as signal names 2-20, 2-10, and 2-30, respectively, route 2 to route 2
It is possible to know whether or not the test for 0, 10, and 30 was performed correctly. This also applies to the case of FIG. 2C,
By doing this, it is possible to know whether all routes have been tested correctly. Whether or not a signal with the same name as that cross-connect path has passed through each cross-connect path can be realized by detecting the signal name, and whether or not all cross-connect paths have been tested is determined by each test. This can be confirmed by setting flags for each and taking the logical product of the flags.

[0024]

As described above, according to the present invention, when a signal having the same signal name as the set cross connect path passes through the cross connect path, it is determined that the designated cross connect path has been correctly tested. By doing so, there is an effect that it is possible to automatically detect whether all the paths have been correctly checked by performing the check on all the cross-connect paths.

[Brief description of drawings]

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

FIG. 2 is a diagram illustrating a flow of cells for explaining the operation of the device of FIG.

[Explanation of symbols]

 1, 2, 3, 10, 20, 30 routes 100 ATM cross-connect path automatic tester 200 ATM cross-connect device 300 control device 500 comparison circuit 600 rearrangement circuit 700, 800 buffer

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical display location H04Q 1/22 3/00 11/04 9076-5K H04Q 11/04 L

Claims (3)

[Claims] 1. In an automatic test method for an ATM cross-connect device for automatically testing interconnections of a plurality of routes, at least one of the signals passing through each cross-connect path has the same name as the cross-connect path of interest. When a signal having the same name as the cross-connect path passes through the cross-connect path of interest, a check process is performed to determine that the signal has passed through that path correctly. An automatic test method for an ATM cross-connect device, characterized in that it is judged that the necessary cross-connect path test has been completed based on what has been done for all. 2. An automatic test method for an ATM cross-connect device for automatically testing interconnections of a plurality of routes, when a buffer is provided between an outgoing line and an incoming line of each route and a signal is output to the buffer. The signal is output to the next cross-connect path A
TM automatic test method for cross-connect equipment. 3. An automatic test method for an ATM cross-connect device for automatically testing interconnections of a plurality of routes, wherein a final output signal randomly passing through a plurality of cross-connect paths is first input to the cross-connect path. An AT characterized in that it is determined whether or not the signal that has passed through the cross-connect path is a correct signal by rearranging in order and comparing the rearranged signal with the first output signal.
Automatic test method for M cross-connect equipment.