JPH02277356A - Test method for substitution of remote station exchange - Google Patents

Abstract

PURPOSE:To prevent mis-matching from occurring in switching by inputting the status of a subscriber line to old and new remote stations in parallel before switching the remote station, comparing the control information with response information of both stations, and confirming consistency between the data of a master station and that of a new remote station. CONSTITUTION:The signals of call issuing and disconnection outputted from a subscriber telephone set 7 are detected at a subscriber circuit 10, and are transferred to a master station exchange 3, and also, are transferred to autonomous controllers 13 and 23. The autonomous controller 23 compares line signal information received from a subscriber line monitoring device 24 independently with the above signals, and verifies the mis-connection of a disconnector 5. When call control information is transmitted from the master station exchange 3 to the remote station exchange 1, it is sent to the subscriber line 6, and the signal is detected by the subscriber line monitoring device 24, and is sent to the autonomous controller 23. The autonomous controller 23 compares it with the subscriber line decided based on the call information from the master station exchange 3 arriving from the autonomous controller 13, and verifies the consistency between the data.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a test method for switching equipment.

In particular, the present invention relates to a replacement test for remote exchanges that are operated under the control of a master exchange.

[Prior Art] Conventionally, replacement tests for remote office exchanges constituting this type of switching system have been carried out by system tests using new remote office exchanges alone and manual tangent tests.

In other words, in the conventional replacement test, a subscriber line pseudo-calling/termination tester is connected instead of the subscriber to a disconnector for accommodating the subscriber line to a new remote exchange. A pseudo interoffice transmission line is connected, and a pseudo exchange is connected to the transmission line instead of the master exchange. Then, an information transmission/reception test is carried out by automatically or manually transmitting control information from the pseudo exchange to a new remote exchange and receiving response information.

Furthermore, by conducting a call processing test in which the call processing by the subscriber line pseudo call origination/termination test equipment was exchanged by the pseudo exchange via the remote exchange, the system was tested for a new remote exchange.

In addition, switching from the current subscriber circuit of the remote central office exchange to the subscriber circuit of the new remote central office exchange using the new subscriber line equipment must be carried out simultaneously with the switching to the remote central central office exchange. . In this case, a connection test was performed because a connection error or omission between the disconnector and the subscriber circuit would lead to interruption of call processing or connection error.

However, before switching to the new remote central office switch,
Since the subscriber line is connected to the subscriber circuit of the current remote central office exchange by a disconnect switch and is separated from the subscriber circuit of the new remote central office exchange, the connection test is normally performed using a visual inspection inside the central office. Check continuity by simply testing the correspondence between the construction ledger and the subscriber ledger, or by momentarily connecting the subscriber line and the subscriber circuit of the new remote central exchange during low-traffic hours such as at night. This was done in conjunction with a continuity test.

[Problems to be solved] The above-mentioned conventional remote office exchange replacement test is as follows.

This was carried out by constructing a switching system in which a pseudo test machine was connected around a new remote exchange, so the hardware configuration was not particularly different from the hardware configuration used in the in-house testing at the factory prior to shipment. There was a problem in that it was impossible to expect to discover any new heart attacks in the national examinations.

In addition, it is necessary to check the compatibility between the new remote exchange and the operating master exchange, which should be carried out in the field test, especially the consistency with the station data and subscriber data, which vary from office to office. There was a problem that it wasn't there.

Furthermore, the connection test at the disconnector of the subscriber line was performed manually, which took a lot of time and was prone to errors.

An even more serious problem is that these remaining bald spots are discovered after switching to a new remote central office switch, which can lead to call processing interruptions and misconnections to subscribers. In the worst case scenario, there was even a possibility that it would develop into a system town.

As described above, the conventional remote exchange replacement test has various problems.

The present invention has been made in view of the above-mentioned problems.
It is possible to automatically verify the consistency of data between the master exchange and the new remote exchange, and to check for connection errors or omissions at the subscriber line disconnect switch. The purpose of this paper is to provide a remote exchange replacement test method that can be performed previously.

[Means for Solving Problems] In order to achieve the above object, the remote exchange switching test method of the present invention includes a master exchange that controls the entire switching system, a remote exchange that is subordinate to the master exchange, and a remote exchange that is subordinate to the master exchange. In the event of a failure in the inter-office transmission line connecting exchanges and this inter-office transmission line,
In a switching system that has a remote central office exchange or an autonomous control device installed in the remote central office exchange for autonomous operation, when replacing the current remote central office exchange with a new remote central office exchange, the autonomy of the current remote central office exchange is The control device monitors control information from the master exchange and response information from the remote exchange to the master exchange, and transfers the control information and response information from the autonomous control device of the current remote exchange to the new remote exchange. Transfer the subscriber line accommodated in the current remote exchange to the autonomous control device, connect it to the new remote exchange, monitor this subscriber line, and use the autonomous control device of the new remote exchange to By comparing the monitoring results of the subscriber line with the control information and response information, it is possible to verify data consistency between the master exchange and the new remote exchange and connection errors or omissions at the disconnector of the subscriber line. Here's how to do it.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram illustrating an example of a system for implementing one embodiment of the method of the present invention.

In the figure, 1 is a currently operating remote exchange, 2 is a new remote exchange, 3 is a master exchange, and 4 is an inter-office transmission line connecting the master exchange and remote exchange 1.

5 is a disconnector. This disconnector 5 connects the subscriber line 6 to
During the test, it connects to both the current and new remote exchange 1.2 in multiple ways, and after switching to the new remote exchange 2, it has the function of disconnecting from the current remote exchange 1. There is. Note that 7 is a subscriber telephone.

IO and 20 are subscriber circuits of each of the remote exchanges, 11 and 21 are subscriber line concentration switches, 12 and 22 are transmission line interface circuits, 13 and 23 are autonomous control devices, This is for autonomous operation when control cannot be received from the remote exchange 1.2 or the master exchange 3 due to such reasons.

Reference numeral 24 denotes a subscriber line monitoring device, which monitors the line signal on the subscriber line 6 connected to the new remote exchange 2 and reports the result to the autonomous control device 23.

25 is a communication path between CPUs, and is a transmission path interface circuit 1.
2, the control information and response information on the inter-office transmission path 4 monitored by the autonomous control device 13 are sent to the new autonomous control device 2.
Transfer to 3.

Next, the alternation test in this example will be described.

First, the station data, subscriber data and test program are entered into the memory of the autonomous controller 23. Then execute the test program.

When calling or disconnecting the subscriber telephone 7, the subscriber line 6f7
) ON-HOOK, 0FF-HOOK 17) After the line signal is received and detected by the subscriber circuit 10, it is transferred to the master exchange 3 as response information via the interoffice transmission line 4. This response information is also transferred to the autonomous control device 23 via the autonomous control device 13 and the inter-CPU transmission line 25.

The autonomous control device 23 independently controls the subscriber line monitoring device 24.
The line signal information received from the disconnector 5 is compared with the response information to verify a connection error or a connection failure in the disconnector 5.

When a call is made to the subscriber line 6, call control information is transmitted from the master exchange 3 to the remote exchange 1.

The remote office exchange 1 sends a paging signal from the subscriber circuit 10 to the subscriber line 6. This calling signal is also received by the subscriber line monitor device 24 via the disconnector 5.

The subscriber line monitor device 24 reports the detection of the paging signal to the autonomous control device 23.

On the other hand, the call control information from the master exchange 3 mentioned above is
Transmission line interface circuit 12 and autonomous control device 13
It is relayed to the autonomous control device 23 via.

The autonomous control device 23 determines the subscriber line number to be controlled based on the relayed call control information and stored subscriber data. Then, by comparing that number with the report from the subscriber line monitoring device 24, the master exchange 3
Verify consistency with data.

In this way, the present method includes means for monitoring information on the transmission path in the autonomous control device 13 of the current remote exchange l, means for transferring information to the autonomous control device 23 of the new remote exchange a2, and Means for simultaneously connecting the line 6 to both remote exchanges, means for monitoring subscriber lines in the new remote exchange 2, and transmitting line monitoring results and information to the autonomous control device 23 of the new remote exchange 2. By providing a comparison means and comparing the monitoring results of the subscriber line 6 with the control information and response information in the autonomous control device 23 of the new remote exchange 2, the master exchange 3 and the new remote exchange 2 can be compared. It is possible to verify data consistency with the subscriber line and to check for connection errors or omissions at the subscriber line disconnector.

[Effects of the Invention] As explained above, the present invention automatically verifies the consistency of data between a master exchange and a new remote exchange, and also verifies connection errors or omissions at subscriber line disconnectors. Moreover, it has the advantage that these verifications can be carried out before the remote exchange is replaced.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the remote exchange replacement testing method of the present invention. 1: Remote office exchange currently in operation 2: New remote exchange 3: Master exchange 4: Inter-office transmission line 5: Disconnector 6: Subscriber circuit 7: Subscriber telephone 10. 20: Subscriber circuit 11.21: Subscriber line concentration switch 12.22: Transmission line interface circuit 13.23: Autonomous control device 24: Subscriber line monitoring device 25: CPU-to-CPU transmission Transmission line Patent attorney Kihei Watanabe

Claims (1)

[Scope of Claims] A master exchange that supervises the entire switching system, a remote exchange subordinate to the master exchange, an inter-office transmission line connecting these two exchanges, and ,
In a switching system that has an autonomous control device installed in the remote office exchange for autonomous operation of the remote office exchange, when replacing the current remote office exchange with a new remote office exchange, the autonomy of the current remote office exchange is The control device monitors control information from the master exchange and response information from the remote exchange to the master exchange, and transfers the control information and response information from the autonomous control device of the current remote exchange to the new remote exchange. Transfer the subscriber line accommodated in the current remote exchange to the autonomous control device, connect it to the new remote exchange, monitor this subscriber line, and use the autonomous control device of the new remote exchange to By comparing the monitoring results of the subscriber line with the control information and response information, it is possible to verify data consistency between the master exchange and the new remote exchange and connection errors or omissions at the disconnector of the subscriber line. A method for testing remote exchange switching, characterized by performing the following steps.