JP2022100543A - Continuity test device, continuity test method, and program - Google Patents

Abstract

To provide a continuity test device, a continuity test method, and a program that can detect the normality of data sent and received in a call path, and identify a misconnected call path with less test data.SOLUTION: A continuity test device 11 includes: a transmission unit 111 that sets common fixed data from a first time slot to an nth time slot of a first frame, sets inverted fixed data from a first time slot to an nth time slot of a second frame, sets an nth transmission destination slot number and a transmission source slot number from a first time slot to an nth time slot of a third frame, and transmits the third frame from the first frame; and a receiving unit 112 that collates the common fixed data with an expected value, collates the inverted fixed data with the expected value, collates the transmission source slot number with the expected value, and collates the nth transmission destination slot number with the expected value.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to continuity test equipment, continuity test methods, and programs, and in particular, less test data to detect the normality of data transmitted and received through the call path and to identify misconnected call paths. Concerning continuity test equipment, continuity test methods, and programs that can be performed in.

In a voice system such as a telephone exchange system or a media gateway system, when a failure occurs in the system, it is an important requirement of the telephone service to detect the failure and take recovery measures. There are various circuit examples that use pilot patterns to detect the occurrence of a system failure. However, there are few circuit examples for detecting an erroneous connection with a call path, and even if these circuits are used, it is often difficult to identify the call path (suspected part) of the erroneous connection and investigate the cause. Therefore, for the maintenance and operation of the system, it is desired to detect an abnormality in the call path and specify the call path (occurrence section) of the erroneous connection.

In paragraph 0006 of Patent Document 1, "The telephone path device is interposed between the connection devices of the front stage and the rear stage, the front stage connection device has a test data generation circuit and a test data insertion circuit, and the rear stage connection device has a test data check. Each circuit is configured to be included. " Further, in paragraph 0007 of Patent Document 1, "In the pre-stage connection device, test data" AA "and" 55 "are alternately inserted by the test data insertion circuit at each frame cycle and then transmitted onto the telephone path device. In the test data check circuit of the post-stage connection device, the preset test data and the test data on the control signal time slot received via the telephone path device and the output highway are compared and collated at each frame period. " Have been described.

Japanese Unexamined Patent Publication No. 11-068946

As described above, it is desired to detect abnormalities in the call path and identify the call path of erroneous connection for the maintenance and operation of the system. Therefore, since the service data for the call is reduced and the test data is inserted, there is a problem that the storage efficiency of the service data is lowered.

An object of the present disclosure is to provide a continuity test device, a continuity test method, and a program that solve any of the above-mentioned problems.

The continuity test apparatus according to the present disclosure is
For testing the first to nth callways between each of the source card and the first destination card to the nth destination card (n is a natural number),
Set common fixed data in each time slot from the 1st time slot to the nth time slot of the 1st frame, and set it.
Inverted fixed data in which the common fixed data is inverted is set in each time slot from the first time slot of the second frame to the nth time slot.
The nth destination slot number indicating the position in the own device in which the nth destination card is mounted and the source card are mounted in each time slot from the first time slot to the nth time slot of the third frame. Set the source slot number indicating the location in the own device,
A transmission unit that transmits the third frame from the first frame to the nth destination card from the first destination card via the nth telephone path from the first communication path.
In each of the first destination card to the nth destination card,
The common fixed data transmitted from the source card and the expected value of the common fixed data are collated, the inverted fixed data and the expected value of the inverted fixed data are collated, and the source card and the nth The normality of the data transmitted / received to / from the nth communication path to / from the destination card is detected.
The source slot number transmitted from the source card is collated with the expected value of the source slot number, and the nth destination slot number is collated with the expected value of the nth destination slot number. A receiver that identifies the call path of a misconnection,
To prepare for.

The continuity test method according to the present disclosure is
For testing the first to nth callways between each of the source card and the first destination card to the nth destination card (n is a natural number),
Setting common fixed data in each time slot from the first time slot to the nth time slot of the first frame, and
Inverted fixed data in which the common fixed data is inverted is set in each time slot from the first time slot of the second frame to the nth time slot.
The nth destination slot number indicating the position in the own device in which the nth destination card is mounted and the source card are mounted in each time slot from the first time slot to the nth time slot of the third frame. To set the source slot number that indicates the location in the own device,
Transmission of the third frame from the first frame to the nth destination card from the first destination card via the nth communication path from the first communication path.
In each of the first destination card to the nth destination card,
The common fixed data transmitted from the source card and the expected value of the common fixed data are collated, the inverted fixed data and the expected value of the inverted fixed data are collated, and the source card and the nth Detecting the normality of data transmitted / received to / from the nth communication path to / from the destination card, and
The source slot number transmitted from the source card is collated with the expected value of the source slot number, and the nth destination slot number is collated with the expected value of the nth destination slot number. Identifying the wrong connection path and
To prepare for.

The program related to this disclosure is
For testing the first to nth callways between each of the source card and the first destination card to the nth destination card (n is a natural number),
Setting common fixed data in each time slot from the first time slot to the nth time slot of the first frame, and
Inverted fixed data in which the common fixed data is inverted is set in each time slot from the first time slot of the second frame to the nth time slot.
The nth destination slot number indicating the position in the own device in which the nth destination card is mounted and the source card are mounted in each time slot from the first time slot to the nth time slot of the third frame. To set the source slot number that indicates the location in the own device,
Transmission of the third frame from the first frame to the nth destination card from the first destination card via the nth communication path from the first communication path.
In each of the first destination card to the nth destination card,
The common fixed data transmitted from the source card and the expected value of the common fixed data are collated, the inverted fixed data and the expected value of the inverted fixed data are collated, and the source card and the nth Detecting the normality of data transmitted / received to / from the nth communication path to / from the destination card, and
The source slot number transmitted from the source card is collated with the expected value of the source slot number, and the nth destination slot number is collated with the expected value of the nth destination slot number. Identifying the wrong connection path and
Let the computer run.

According to the present disclosure, a continuity test apparatus, a continuity test method, and a continuity test method capable of detecting the normality of data transmitted and received through a call path and identifying a misconnected call path with less test data. A program can be provided.

It is a block diagram which illustrates the continuity test apparatus which concerns on Embodiment 1. FIG. It is a block diagram which illustrates the functional block of the continuity test apparatus which concerns on Embodiment 1. FIG. It is a figure which illustrates the test data which concerns on Embodiment 1. FIG. It is a figure which illustrates the time slot configuration of the transmission test data which concerns on Embodiment 1. FIG. It is a figure which illustrates the time slot configuration of the reception test data which concerns on Embodiment 1. FIG. It is a figure which illustrates the time slot configuration of the transmission test data which concerns on Embodiment 1. FIG. It is a figure which illustrates the time slot configuration of the reception test data which concerns on Embodiment 1. FIG. It is a block diagram which illustrates the confirmation of the connection of the call path which concerns on Embodiment 1. FIG. It is a block diagram which illustrates the confirmation of the connection of the call path which concerns on Embodiment 1. FIG. It is a block diagram which illustrates the functional block of the continuity test apparatus which concerns on the comparative example of Embodiment 1. FIG. It is a figure which illustrates the test data which concerns on Embodiment 2. FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each drawing, the same or corresponding elements are designated by the same reference numerals, and duplicate description will be omitted as necessary for the sake of clarification of the description.

[Embodiment 1]
<Outline of the configuration of the continuity test device>
FIG. 1 is a block diagram illustrating the continuity test apparatus according to the first embodiment.
FIG. 1 shows the minimum configuration of the continuity test apparatus according to the first embodiment.

As shown in FIG. 1, the continuity test apparatus 11 according to the first embodiment includes a transmission unit 111 and a reception unit 112.

The transmission unit 111 is a first time slot (1st time slot) of the first frame for testing the first to nth communication paths between the source card and each of the first destination card and the nth destination card. Common fixed data is set in each time slot from 1TS: Time Slot) to the nth time slot. However, n is a natural number. The transmission unit 111 sets inverted fixed data in which common fixed data is inverted in each time slot from the first time slot to the nth time slot of the second frame. The transmission unit 111 transmits a nth destination slot number indicating a position in the continuity test apparatus 11 in which the nth destination card is mounted in each time slot from the first time slot to the nth time slot of the third frame. A source slot number indicating a position in the continuity test device 11 on which the original card is mounted is set. The transmission unit 111 transmits the first frame to the third frame from the first transmission path to the nth destination card via the first communication path to the nth communication path.

The transmission unit 111 transmits the first frame first, the second frame second, and the third frame third.

The receiving unit 112 collates the common fixed data transmitted from the source card with the expected value of the common fixed data in each of the first destination card to the nth destination card. The receiving unit 112 collates the inverted fixed data with the expected value of the inverted fixed data. The receiving unit 112 detects the normality of the data transmitted / received in the nth communication path between the source card and the nth destination card based on the collation result. The receiving unit 112 collates the source slot number transmitted from the source card with the expected value of the source slot number. The receiving unit 112 collates the nth destination slot number transmitted from the source card with the expected value of the nth destination slot number. The receiving unit 112 identifies the call path of the erroneous connection based on the collation result. The common fixed data, the inverted fixed data, the nth transmission destination slot number, and the transmission source slot number used for the test of the first to the nth communication path are referred to as test data.

The continuity test apparatus 11 according to the first embodiment uses common fixed data and inverted fixed data as test data, and changes all the bits of the test data. Therefore, when a specific bit fails with a fixed value, etc. Bit error can be detected. This makes it possible to detect the normality of the data transmitted / received in the call path. As a result, according to the first embodiment, it is possible to provide a continuity test device, a continuity test method, and a program capable of detecting the normality of data transmitted and received through a telephone path.

Further, since the continuity test apparatus 11 according to the first embodiment uses the source slot number and the destination slot number as test data to collate the expected value, it detects an erroneous connection and further determines which It is possible to identify whether an abnormality (wrong connection) has occurred with the source card. As a result, according to the first embodiment, it is possible to provide a continuity test device, a continuity test method, and a program capable of identifying a communication path of erroneous connection.

Further, in the continuity test apparatus 11 according to the first embodiment, for example, when n = 2, the number of time slots used in the test data is two per frame. This is half the number of test data used in the comparative examples described below. As a result, according to the first embodiment, it is possible to detect the normality of the data transmitted / received in the call path and to identify the call path of the erroneous connection with less test data. Test equipment, continuity test methods, and programs can be provided.

Further, since the continuity test apparatus 11 according to the first embodiment can use more service time slots used for the service, it is possible to improve the storage efficiency of the service data.

<Details of the configuration of the continuity test device>
FIG. 2 is a block diagram illustrating a functional block of the continuity test apparatus according to the first embodiment.
Each functional block shown in FIG. 2 includes a transmitting unit 111 and a receiving unit 112 shown in FIG.

As shown in FIG. 2, in the first embodiment, the functional block on the transmitting side (functional block 101 and functional block 103) and the functional block on the receiving side (functional block 102 and functional block 104) are connected via the switch 107. Has been done. The functional block 101 is included in the source card 101c. The functional block 102 is included in the destination card 102c. The functional block 103 is included in the source card 103c. The functional block 104 is included in the destination card 104c.

In the first embodiment, a part of the time slot for transmitting / receiving service data (call data) is used as a test time slot for transmitting / receiving test data. Check the normality of the test data by sending and receiving test data using the test time slot. Thereby, the normality of the call path is confirmed. As the test time slot for confirming the normality of the call path, one time slot is used for one call path (direction), and only the opposite call path is used. The multiple test time slots are connected in a one-to-one mesh pattern by individually setting the connection of the call path to the other party with the switch 107, and the test data used for checking the incorrect connection of the call path. Use different data.

The test data for confirming the normality of the call path is common fixed data, and may be, for example, a hexadecimal number 55. Further, the test data for confirming the normality of the call path is inverted fixed data, and may be, for example, hexadecimal AA. Further, the test data for identifying the call path of the erroneous connection may be different for each connection destination card (for each call path). The test data for identifying the misconnected call path is, for example, a source slot number and a source slot number of the call path.

<Operation of continuity test device>
FIG. 3 is a diagram illustrating test data according to the first embodiment.
FIG. 4 is a diagram illustrating a time slot configuration of transmission test data according to the first embodiment.
FIG. 4 shows a time slot configuration of source card 101c transmission test data mounted in slot number 1.
FIG. 5 is a diagram illustrating a time slot configuration of reception test data according to the first embodiment.
FIG. 5 shows a time slot configuration of destination card 102c reception test data mounted in slot number 2.

FIG. 6 is a diagram illustrating a time slot configuration of transmission test data according to the first embodiment.
FIG. 6 shows a time slot configuration of source card 103c transmission test data mounted in slot number 3.
FIG. 7 is a diagram illustrating a time slot configuration of reception test data according to the first embodiment.
FIG. 7 shows a time slot configuration of destination card 104c reception test data mounted in slot number 4.

As shown in FIGS. 3 to 7, the source card uses 3 multiframe data as the test data used for the test time slot. The source card sets the same test data in all the call paths in the test data in the first frame. The source card sets the test data in the second frame different from the test data in the first frame, and sets the same test data in all the communication paths. The source card sets different test data for each call path (direction) in the test data in the third frame. The first frame may be referred to as a first frame, the second frame may be referred to as a second frame, and the third frame may be referred to as a third frame.

Specifically, the source card sets "55" in the first frame, "AA" in the second frame, and "XY" in the third frame. For the source card, the destination slot number (for example, any one of 0 to 15) is set in hexadecimal in "X", and the source slot number (for example, any one of 0 to 15) is set in "Y". One number) is set in hexadecimal.

For the source card, for example, when the source card is mounted in the slot number 1 and the destination card is mounted in the slot number 2, "XY" is set to "21". Further, as for the source card, when the source card is mounted in the slot number 1 and the destination card is mounted in the slot number 4, "XY" is set to "41". Then, the source card repeatedly transmits the data from the first frame to the third frame. In this way, by using the 3 multi-frame data from the 1st frame to the 3rd frame as one data for the test time slot, it is possible to perform a test of one call path (direction) in one time slot. ..

Since the destination card that receives the test data stores the test data from different source cards in each test time slot, the check is performed for each time slot. The destination card confirms the test data of 3 multi-frames. As the test data (test data for detecting erroneous connection of the call path) in the third frame, different test data is set for each call path (direction).

Specifically, it is confirmed that, for example, "55" is set as the common fixed data in the first frame of the destination card. The destination card confirms that "AA" as inverted fixed data is set in the second frame. The destination card detects that the data transmitted / received in the call path is normal when the expected value of the common fixed data and the common fixed data match and the expected value of the inverted fixed data and the inverted fixed data match.

The destination card confirms that "XY" is set in the third frame by collating the expected value. For the destination card, confirm that the destination slot number (slot number of the received card) is set in "X" and the source slot number is set in "Y".

For example, when the destination card is mounted in slot number 2, the source card is mounted in slot number 1, and the destination card receives test data transmitted from the source card, the destination card is "XY. Confirm that "" is "21". Further, when the destination card is mounted in slot number 4, the source card is mounted in slot number 1, and the destination card receives test data transmitted from the source card, the destination card is set to "XY". Confirm that "" is "41". Then, the destination card repeatedly confirms the data from the first frame to the third frame.

The test data of "55" in the first frame and "AA" in the second frame is to detect a bit error such as when a specific bit fails with a fixed value by changing all 8 bits. Can be done.

If the destination slot number or the source slot number of the test data of "XY" in the third frame is different from the expected value, it can be determined that the connection is not desired, so that the destination card is erroneously connected. It can be detected.

In this way, the source card sets different test data for each connection destination of the call path, and the destination card confirms each of them, so that the normality of the test data for transmitting and receiving the call path and the call path It is possible to detect incorrect connections.

FIG. 8 is a block diagram illustrating the confirmation of the connection of the telephone path according to the first embodiment.
FIG. 8 shows the case of a normal state.
FIG. 9 is a block diagram illustrating the confirmation of the connection of the telephone path according to the first embodiment.
FIG. 9 shows the case of abnormality detection (detection of erroneous connection).

As shown in FIG. 8, in the normal state, when the destination card collates the test data with the expected value and confirms the test data, the test data matches the expected value, so that the connection state of the call path is normal. Judge.

The destination card is in an abnormal state, for example, when the source slot number and the expected value of the source slot number do not match, or when the destination slot number and the expected value of the destination slot number do not match. The misconnected call path is identified as the call path between the source card implemented in the transmitted source slot number and the destination card implemented in the transmitted destination slot number.

As shown in FIG. 9, in the case of an abnormal state, the communication path from the source card mounted in slot number 3 to the destination card mounted in slot number 2 is not connected, and the transmission mounted in slot number 5 is not connected. The call path from the original card to the destination card mounted in slot number 2 is erroneously connected. That is, FIG. 9 shows a state in which the test data is replaced because the source card is incorrect.

In the normal state, the test data in which "23" was set in the third frame should have been transmitted from the source card mounted in slot number 3 to the destination card mounted in slot number 2. .. However, since the connection was incorrect, the destination card detected "25" as test data in the third frame. In this case, since the measured value in the third frame is "25" and the expected value is "23", a discrepancy occurs. As a result, the destination card (the card that receives the test data) detects the erroneous connection. Further, the destination card is the same as the source card mounted in the source slot number 5 based on "25" (destination slot number 2, source slot number 5) of the test data when an abnormality is detected. It can be determined that an abnormality has occurred between them.

The destination card may receive the third frame when the expected values of the common fixed data and the common fixed data match and the expected values of the inverted fixed data and the inverted fixed data match.

<Effect>
The continuity test device 11 according to the first embodiment performs test data for confirming the normality of a call path in one time slot per call path (direction) in a system that handles voice. As a result, the continuity test apparatus 11 can use more service time slots used for service, and can improve the efficiency of accommodating service data.

Further, the continuity test apparatus 11 according to the first embodiment detects (confirms) whether or not the connection is erroneous by collating the expected value based on the transmission destination slot number and the transmission source slot number used as the test data. )do. Therefore, when the continuity test device 11 detects an erroneous connection, it can determine to which slot number the card is erroneously connected based on the contents of the confirmed test data, so that the erroneous connection can be determined. It is possible to identify the call path (suspected part) of.

As a result, according to the first embodiment, the continuity test apparatus capable of detecting the normality of the data transmitted / received in the call path and specifying the call path of the erroneous connection with less test data. Continuity test methods and programs can be provided.

<Characteristics>
Here, the features of the first embodiment are described below.
In the voice system of the media gateway system that enables the exchange of voice data on the telephone exchange system and IP (Internet Protocol) network, when a failure occurs in the system, the failure is detected and recovery measures are taken. Many have features that allow the service to continue. In particular, in a telephone path where voice data flows, the user directly feels the quality of the telephone service, and when abnormal data occurs due to various factors or an erroneous connection with another telephone path occurs. It is necessary to ensure the quality of service by reliably detecting and dealing with abnormalities. The first embodiment relates to a continuity test for the purpose of detecting the normality of data transmitted / received in and out of a telephone path (normality of a call path) and erroneous connection with another call path in such a voice system. ..

[Comparison example]
FIG. 10 is a block diagram illustrating a functional block of the continuity test apparatus according to the comparative example of the first embodiment.
FIG. 10 shows from the functional block of slot number 1 to the functional block of slot number 2 and the functional block of slot number 4 via the switch 507, and from the functional block of slot number 3 to the functional block of slot number 2 and the functional block of slot number 4. An example of sending test data to each block is shown.

As shown in FIG. 10, in the continuity test apparatus 51 according to the comparative example, the test data is inserted into the test time slot by the functional block of the source card, and the test data is inserted into the test time slot by the functional block of the destination card. Check the test data. As a result, the continuity test device 51 confirms the normality of the test data. When confirming the test data, the continuity test apparatus 51 confirms the normality by using two time slots for each communication path.

In the first time slot, the continuity test device 51 collates the expected value with the destination card (reception side) using different data for each opposite slot, and if a mismatch is detected, it is determined that the connection is incorrect. .. In the second time slot, the continuity test device 51 sets inverted data in which the first data is inverted, and detects a bit error by checking the first and second time slots. In the comparative example, when testing a plurality of communication paths, a test time slot is required for twice the number of communication paths. Therefore, when the number of call paths increases, it is necessary to limit the number of service time slots used for the service, and the storage efficiency of service data (call data) decreases.

As a result, according to the comparative example, a continuity test device and a continuity test capable of detecting the normality of the data transmitted and received in the call path and identifying the call path of the erroneous connection with less test data. Difficult to provide methods and programs.

[Embodiment 2]
FIG. 11 is a diagram illustrating test data according to the second embodiment.
As shown in FIG. 11, in the second embodiment, the test data used for the test time slot is set to the hexadecimal number “FF” as a flag signal indicating the beginning of the multi-frame in the first frame. For the test data according to the second embodiment, the transmission destination slot number and the transmission source slot number are set in the second frame. For the test data according to the second embodiment, the transmission destination slot number and the inverted data of the transmission source slot number are set in the third frame. On the destination card, check the 3 multi-frame data from the 1st frame to the 3rd frame.

In the above embodiment, the present invention has been described as a hardware configuration, but the present invention is not limited thereto. The present invention can also realize the processing of each component by causing a CPU (Central Processing Unit) to execute a computer program.

In the above embodiment, the program can be stored and supplied to the computer using various types of non-transitory computer readable medium. Non-temporary computer-readable media include various types of tangible storage media. Examples of non-temporary computer-readable media include magnetic recording media (specifically flexible disks, magnetic tapes, hard disk drives), opto-magnetic recording media (specifically opto-magnetic disks), and CD-ROMs (Read Only Memory). ), CD-R, CD-R / W, semiconductor memory (specifically, mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM)), flash ROM, RAM (Random Access Memory). The program may also be supplied to the computer by various types of transient computer readable media. Examples of temporary computer readable media include electrical, optical, and electromagnetic waves. The temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.

In addition, the actions are drawn in a particular order, which means that such actions are performed or shown in a particular order or in a contiguous order to achieve the desired result. It should not be understood as requiring all actions to be performed. In certain situations, multitasking and parallelism may be advantageous. Similarly, details of some particular embodiments are included in the discussion above, but these are to be construed as an explanation of the characteristics specific to the particular embodiment, not as a limitation to the scope of the present disclosure. Should be. Certain features described in the context of separate embodiments may be implemented in combination with a single embodiment. Conversely, the various features described in the context of a single embodiment may be implemented separately in multiple embodiments or in any suitable combination.

Although the invention of the present application has been described above with reference to the embodiments, the invention of the present application is not limited to the above. Various changes that can be understood by those skilled in the art can be made within the scope of the invention in the configuration and details of the invention of the present application.

The present invention is not limited to the above embodiment, and can be appropriately modified without departing from the spirit.

11, 51: Continuity test device 101, 102, 103, 104, 105: Functional block 101c, 102c, 103c, 104c, 105c: Card 107, 507: Switch 111: Transmitter 112: Receiver

Claims (10)

For testing the first to nth callways between each of the source card and the first destination card to the nth destination card (n is a natural number),
Set common fixed data in each time slot from the 1st time slot to the nth time slot of the 1st frame, and set it.
Inverted fixed data in which the common fixed data is inverted is set in each time slot from the first time slot of the second frame to the nth time slot.
The nth destination slot number indicating the position in the own device in which the nth destination card is mounted and the source card are mounted in each time slot from the first time slot to the nth time slot of the third frame. Set the source slot number indicating the location in the own device,
A transmission unit that transmits the third frame from the first frame to the nth destination card from the first destination card via the nth telephone path from the first communication path.
In each of the first destination card to the nth destination card,
The common fixed data transmitted from the source card and the expected value of the common fixed data are collated, the inverted fixed data and the expected value of the inverted fixed data are collated, and the source card and the nth The normality of the data transmitted / received to / from the nth communication path to / from the destination card is detected.
The source slot number transmitted from the source card is collated with the expected value of the source slot number, and the nth destination slot number is collated with the expected value of the nth destination slot number. A receiver that identifies the call path of a misconnection,
A continuity test device. When the common fixed data and the expected value of the common fixed data match, and the inverted fixed data and the expected value of the inverted fixed data match, the receiving unit transmits / receives the nth communication path. Detects as normal,
The continuity test apparatus according to claim 1. In the receiving unit, when the source slot number and the expected value of the source slot number do not match, or when the nth destination slot number and the expected value of the nth destination slot number do not match. The misconnected communication path is the communication path between the source card mounted on the transmitted source slot number and the destination card mounted on the transmitted destination slot number. Identify as there,
The continuity test apparatus according to claim 1 or 2. When the common fixed data and the expected value of the common fixed data match, and the inverted fixed data and the expected value of the inverted fixed data match, the receiving unit receives the third frame.
The continuity test apparatus according to any one of claims 1 to 3. The transmission unit repeats transmission from the first frame to the third frame.
The continuity test apparatus according to any one of claims 1 to 4. Each of the first frame, the second frame, and the third frame contains service data for a call.
The continuity test apparatus according to any one of claims 1 to 5. The common fixed data is the hexadecimal number 55, and is
The inverted fixed data is hexadecimal AA.
The continuity test apparatus according to any one of claims 1 to 6. The transmitter is
Instead of the common fixed data in the first frame, a hexadecimal FF is set.
Instead of the inverted fixed data of the second frame, the nth destination slot number and the source slot number are set.
Instead of the nth destination slot number of the third frame, an inverted nth destination slot number obtained by inverting the nth destination slot number is set.
Instead of the source slot number of the third frame, an inverted source slot number in which the source slot number is inverted is set.
The continuity test apparatus according to claim 1. For testing the first to nth callways between each of the source card and the first destination card to the nth destination card (n is a natural number),
Setting common fixed data in each time slot from the first time slot to the nth time slot of the first frame, and
Inverted fixed data in which the common fixed data is inverted is set in each time slot from the first time slot of the second frame to the nth time slot.
The nth destination slot number indicating the position in the own device in which the nth destination card is mounted and the source card are mounted in each time slot from the first time slot to the nth time slot of the third frame. To set the source slot number that indicates the location in the own device,
Transmission of the third frame from the first frame to the nth destination card from the first destination card via the nth communication path from the first communication path.
In each of the first destination card to the nth destination card,
The common fixed data transmitted from the source card and the expected value of the common fixed data are collated, the inverted fixed data and the expected value of the inverted fixed data are collated, and the source card and the nth Detecting the normality of data transmitted / received to / from the nth communication path to / from the destination card, and
The source slot number transmitted from the source card is collated with the expected value of the source slot number, and the nth destination slot number is collated with the expected value of the nth destination slot number. Identifying the wrong connection path and
A continuity test method. For testing the first to nth callways between each of the source card and the first destination card to the nth destination card (n is a natural number),
Setting common fixed data in each time slot from the first time slot to the nth time slot of the first frame, and
Inverted fixed data in which the common fixed data is inverted is set in each time slot from the first time slot of the second frame to the nth time slot.
The nth destination slot number indicating the position in the own device in which the nth destination card is mounted and the source card are mounted in each time slot from the first time slot to the nth time slot of the third frame. To set the source slot number that indicates the location in the own device,
Transmission of the third frame from the first frame to the nth destination card from the first destination card via the nth communication path from the first communication path.
In each of the first destination card to the nth destination card,
The common fixed data transmitted from the source card and the expected value of the common fixed data are collated, the inverted fixed data and the expected value of the inverted fixed data are collated, and the source card and the nth Detecting the normality of data transmitted / received to / from the nth communication path to / from the destination card, and
The source slot number transmitted from the source card is collated with the expected value of the source slot number, and the nth destination slot number is collated with the expected value of the nth destination slot number. Identifying the wrong connection path and
A program that causes a computer to run.

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