JPH03296391A - Test method for time division channel - Google Patents

Abstract

PURPOSE:To confirm the continuity of entire time division channel with less hardware by looping back a data of an outgoing highway to an input highway and conducting the test. CONSTITUTION:Outputs of droppers 6-1-6-n are connected to inputs of inserters 4-1-4-n, a pattern transmission circuit 5 is connected to an input highway 2-(n+1) and a pattern reception circuit 7 is connected to an input highway 3-(n+1) so as to loop back a data at a specific time slot on an output highway to an input highway. In this state, a path connecting the pattern transmission circuit 5 and the pattern reception circuit 7 is set by a time division channel 1. The data outputted from the pattern transmission circuit 5 is distributed to an output highway and looped back to the input highway and the continuity test from the input highway to the output highway is implemented by using the data. The data is sent to the pattern reception circuit 7 from the output highway via the input highway and the time division channel 1 and the result of test is evaluated therein.

Description

[Detailed description of the invention] [Industrial application field] INDUSTRIAL APPLICATION This invention is utilized for the maintenance of a digital exchange.

In particular, it relates to a method for testing time-division communication channels.

〔overview〕

The present invention is a time-division communication path testing method that enables continuity confirmation of the entire time-division communication path with a small amount of hardware by looping back the output highway data to the input way and performing the test. be.

[Conventional technology]

To test time division communication paths, a conventional method has been used to insert a fixed number of turns in fixed time slots on the input highway and to monitor the fixed z<turns on the output highway.

That is, an inserter that inserts data into a fixed time slot on the input highway and a dropper that branches the data of the fixed time slot on the output highway are provided, and the fixed pattern output from the pattern sending circuit is input via the inserter. By inserting the data into the fixed time slot of the communication channel, pulling the data branched from the Dorotsunoku into the pattern receiving circuit, and setting the bus that connects the pattern receiving circuit to the pattern receiving circuit as a time-sharing communication path, the bus Continuity monitoring was performed to confirm the normality of the time-sharing communication path.

FIG. 3 is a block diagram showing a conventional time-division channel testing method.

The time-division communication path 1 is composed of a plurality of time switches or a combination of a plurality of time switches and a time-division space switch, and allows the data on the communication ways 2-1 to 2-n to be arbitrarily transmitted for each line. Nodeka＼Iway 3-1～3
-n.

The inserters 4-1 to 4-n receive and take data from the pattern sending circuits 5-1 to 5-n, respectively, and insert the data into predetermined fixed time slots of the input highways 2-1 to 2-n, respectively. .

Each of the pattern sending circuits 5-1 to 5-n generates a fixed pattern determined in advance as test data,
They are supplied to inserters 4-1 to 4-n, respectively.

The droppers 6-1 to 5-n each have an output highway 3.
Branch the data of fixed time slots on -1 to 3-n.

The pattern receiving circuits 7-1 to 7-n receive and receive the data branched by the droppers 6-1 to 5-n, respectively, and check whether the patterns sent by the pattern sending circuits 5-1 to 5-n are successfully received. Determine whether or not.

Here, the pattern sending circuit 5-
By setting the bus so that i and the pattern receiving circuit 7-i (i = 1 to n) are connected, continuity can be monitored on a highway-by-highway basis and the normality of the entire time-division communication path can be confirmed. .

[Problem that the invention seeks to solve]

However, in the conventional time-division communication path testing method, when conducting continuity monitoring on a highway-by-highway basis, pattern sending circuits and pattern receiving circuits are required for each highway.
There was a drawback that the amount of hardware increased.

SUMMARY OF THE INVENTION An object of the present invention is to solve these problems and provide a time-division communication channel testing method that can be implemented with a small amount of hardware.

[Means for solving problems]

The time-division communication path testing method of the present invention involves inputting test data from one input highway of the time-division communication path, distributing this test data to a plurality of output highways by the time-division communication path, and applying the test data to the distributed communication path. The data is branched from each of the multiple output highways and looped back to the corresponding input highway, and the folded data is inserted into a specific time slot on each input highway. − connect the slot to the corresponding time slot of the corresponding output highway;
Branching data in a corresponding time slot from data on each output highway and looping it back to the input highway, and inserting the folded data in the same or different time slot as the corresponding time slot on each input highway, In a time-division communication channel, the data of the same or different time slots is multiplexed and connected to one predetermined output highway, and the data output to this one output highway is used to connect each input highway to each output highway. A special feature is that a pattern sending circuit is connected to one input highway, a pattern receiving circuit is connected to one output highway, and a specific swim slot on the output highway is monitored. data can be routed back to the input highway. In this state, a path connecting the pattern sending circuit and the pattern receiving circuit is set using a time division communication path. The data output from the pattern sending circuit is distributed to the output highway and then returned to the input highway, and the data is used to perform a continuity test from the input highway to the output highway. This data can also be used to
, via an input highway and a time-sharing channel to a pattern receiving circuit where the test results are determined.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block configuration diagram showing a configuration for implementing the test method of the present invention.

In this configuration, the outputs of the droppers 6-1 to 5-n are connected to the inputs of the inserters 4-1 to 4-n, the pattern sending circuit 5 is connected to the input highway 2-(n+1>, and the pattern receiving circuit 7 is connected to the input highway 2-(n+1>). This differs from the conventional example in that it is connected to the output highway 3-(n+1).

The time-division communication path 1 is composed of - or a plurality of time switches or a combination of a plurality of time switches and a time-division space switch, and includes input highways 2-1 to 2-(n+1).
Transfer the above data to any output highway 3-1 to 3-(n+
1) It can be divided into

The inserters 4-1 to 4-n receive and take data from the pattern sending circuits 5-1 to 5-n, respectively, and insert the data into predetermined fixed time slots of the input highways 2-1 to 2-n, respectively. .

The pattern sending circuit 5 generates a predetermined fixed pattern as test data, and outputs the input highway 2-(n
+1).

The droppers 6-1 to 6-n each have an output highway 3.
The data in fixed time slots on -1 to 3-n is branched and returned to inserters 4-1 to 4-n.

The pattern receiving circuit 7 receives and receives data from the output highway 3-(n+1), and determines whether or not the pattern sent out by the pattern sending circuit 5 has been successfully received.

Figure 2 shows the flow of the test.

In this example, there are two time slots into which the inserters 4-1 to 4-n and droppers 6-1 to 5-n insert or branch, and the time slot numbers are ads and b.
Suppose that Also, a continuity test shall be performed between the same input highway number and output highway number.

First, as shown in FIG. 2(a), the pattern sending circuit 5
A fixed pattern is input as test data to the input highway 2-(n+1). At this time, the time slots of the test data are distributed to the time slot numbers a of the output highways 3-1 to 3-n by the path setting of the time division communication path 1. The data of this time slot number a is branched by droppers 6-1 to 5-n, and inserted into the inserter 4, respectively.
-1 to 4-n.

The inserters 4-1 to 4-n insert the folded data into the time slot of time slot number a on the respective input highways 2-1 to 2-n.

At this point, as shown in FIG. 2(b), the time-division communication path 1 is configured so that time slot number a and time slot number 2 are connected between the same input highway number and output highway number. Set the path to . That is, the data of time slot number a of input highway 2-i is connected to the data of time slot number 3 of output highway 3-b.

The data for the time slot number is Dorotsuba 6.
Branched by -1 to 6-n, inserter 4-'1 to 4
−n.

The inserters 4-1 to 4-n insert the folded data into the time slots of the time slot numbers on the respective input highways 2-1 to 2-n.

At this time, as shown in FIG. 2(C), the time-division communication channel 1 is configured such that the data of the time slot numbers of each input highway 2-1 to 2-n are different from each other of the time slot number of the output highway 3-(n+1). Set a path that connects to . As a result, the data of the time slot numbers on the input highways 2-1 to 2-n are multiplexed and output from the output highway 3-(n+1).

In this way, the fixed pattern test data output from the pattern sending circuit 5 is transmitted through the time division communication path 1 → droppers 6-1 to 5-n → inserters 4-1 to 4-n → time division communication path 1 → Dropper 6-1~5-n→Inserter 4-1~
4-n→time division communication path 1→pattern receiving circuit 7. That is, the fixed pattern test data output from the pattern sending circuit 5 is input to the pattern receiving circuit 7 after passing through a path connecting the input and output of each highway.

The pattern receiving circuit 7 time-divisionally switches the data received from each highway in units of time slots, collates the received patterns, and monitors continuity of all highways.

In the above explanation, continuity monitoring between an input highway and an output highway having the same number was explained as an example, but the present invention can be similarly implemented in the case of continuity monitoring between an arbitrary input highway and an arbitrary output highway. can. Also, an example was shown in which a test is performed using two time slot numbers, but a=
The present invention can be implemented in the same manner also in case b. Furthermore, the present invention can be implemented in the same way by using a time slot different from the test time slot (time slot number aSb) for the path from the pattern sending circuit to the dropper and from the inserter to the pattern receiving circuit.

〔Effect of the invention〕

As explained above, the time-division communication channel testing method of the present invention directly connects the dropper of the output highway and the inserter of the input highway, provides means for looping back a specific time slot, and fixes the dropper in the pattern receiving circuit. Pattern matching operation is switched to time division in units of time slots. This makes it possible to match fixed patterns of multiple time slots, and by simply installing a single set of pattern sending circuit and pattern receiving circuit, regardless of the number of highways in the time-division communication path, continuity can be confirmed for the entire time-division communication path. It becomes possible. Therefore, there is an effect that the amount of hardware can be significantly reduced.

[Brief explanation of drawings]

FIG. 1 is a block configuration diagram showing a configuration for implementing the present invention. Figure 2 is a diagram showing the flow of the test. FIG. 3 is a block diagram showing a conventional time-division channel testing method. 1... Time division communication path, 2-1 to 2- (n+1)...
- Input highway, 3-1 to 3- (n+1)... Output highway, 4-1 to 4-n... Inserter, 5.
5-1 to 5-n... pattern sending circuit, 6-1 to 6-
n...dropper, 7,? -1 to 7-n... pattern receiving circuit.

Claims (1)

[Claims] 1. Time-division communication in which test data is inserted into a specific time slot on the input highway of a time-division communication path, and data in a corresponding time slot is monitored on the output highway of the time-division communication path. In the road testing method, test data is input from one input highway, this test data is distributed to a plurality of output highways by the time-sharing communication path, and the distributed test data is branched from each of the plurality of output highways. and inserting this folded data into a specific time slot (a) on each input highway, and said time-sharing channel corresponds to said specific time slot of each input highway. The corresponding time slot of the output highway (b
), branching the data of the corresponding time slot (b) from the data on each output highway and looping it back to the input highway, and connecting the looped data to the same time slot as the corresponding time slot on each input highway. or inserted into another time slot, and in the time division communication path, the data of the same or another time slot is multiplexed and connected to one predetermined output highway, and the data output to this one output highway is A time division communication path testing method for monitoring continuity between each input highway and each output highway.