KR920002479B1 - Cept1(european)type trunk matching and testing method - Google Patents

Abstract

The apparatus to which the method is applicable includes: a man- machine interface means (5), an on-board processor circuit (7), a writing buffer (8), a TD-bus interface means (9), a system bus (10) connected to the above components, a time switch unit interface means (1), a T/S switch (2), a digital CEPT1 trunk interface means (3), and a line interface means (4). First, all the components are initialized, and the matching circuits and relay lines are tested. Then if there is an abnormality, a warning against it is issued in a visual form, and a checking is finds to whether there is another test request. If an interrupt is inputted, the real time operation is carried out. The operator can perform tests in a prompt manner.

Description

CEPT1 (European) trunk line matching and test method of exchange system

1 is a block diagram of a circuit in which the present invention is implemented.

2 is a flow chart of the present invention.

3 is a detailed flowchart of the present invention.

* Explanation of symbols for main parts of the drawings

3: digital CEPT1 trunk interface unit 5: bare machine interface unit

6: read buffer 7: on-board processor

8: write buffer

The present invention relates to a matching and testing method for a relay line using the CEPT1 (Europe) method of an electronic switch, and more particularly, to a method for performing the function of occupying and releasing a relay line, whether there is a failure and testing a normal operation state of a circuit. It is about.

In the CEPT1 (Europe) mode, a repeater line is serviced by 32 channels temporally multiplexed on one track. Therefore, failure to provide service due to breakdown of the relay line or matching device will greatly affect the whole exchange. Failure to receive the trunk line service is mainly caused by failure of the trunk line and circuit.

In order to prevent such a problem, the object of the present invention is to continuously monitor the line state and the state of the other station in the electronic switchboard in which the present invention is implemented, and to periodically report it to the upper processor, and to the relay line and the circuit at the request of the upper processor. It is to provide a relay line matching and test method which improves the reliability of the trunk line and circuit by performing the test and reporting the result to the partner station and the upper maintenance boss processor.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. 1 is a block diagram of a circuit in which the present invention is mounted, FIG. 2 is a flowchart of the present invention, and FIG. 3 is a detailed flowchart of the present invention. In FIG. 1, 1 denotes a time switch unit interface (hereinafter referred to as a TSU interface), 2 denotes a T / S switch, 3 denotes a digital CEPT1 trunk interface (hereinafter referred to as DCI), 4 denotes a line interface, and 5 denotes a machine communication. Interface section (hereinafter referred to as MMC interface section), 6 is a read buffer, 7 is a board processor circuit (hereinafter referred to as OBP circuit), 8 is a write buffer, 9 is a TD-bus interface, 10 is a system bus.

The digital trunk line matching device to which the present invention is mounted has a non-blocking function to switch from a TSU interface unit 1 connected through a TSU and a transmission / reception subhighway (Tx SHW, Rx SHW) to a point-to-point as a time space crosspoint switch. T / S switch (2) consisting of a switch, a DCI (3) connected to the T / S switch (2) and a network sink unit (NSU), a line connected to the DCI (3) and the office / repeater (O / R) The interface unit 4, the system bus 10, the MMC interface unit 5 connected to the system bus 10, the read buffer 6, the write buffer 8, the TD-bus interface unit 9 and the OBP, respectively. It consists of the circuit 7.

2 is a flowchart when the digital trunk line matching device (hereinafter referred to as CTIA) including the present invention is mounted and operated in a system. When the operation is started, various functions in the CTIA are initialized (21), matching device circuits and line status tests (22) are enabled, interrupt is enabled (23), and the main task is performed. When the main task is performed, it is composed of a sequence of performing RTC tasks (26 to 29) by an interrupt of an upper processor that is located outside the CTIA and manages the matching device.

Referring to FIG. 3A, initialization of various functions 21 in the CTIA includes RAM test, USART (IC chip constituting OBP circuit 7), various ports, common memory, crosspoint switch, main transceiver chip register initialization. (31-37). The matching device circuit and the line state test 22 are performed after various function initializations are normally performed. This is performed by driving a looping device to transmit data of a predetermined pattern, and then receiving and comparing the data with the transmission data. If different, it is possible to know whether or not the matching device circuit is abnormal by outputting a " abnormal " message (38 to 40). In addition, the line test is a "normal" when the test request is made to the other station and the data of the specified pattern is transmitted again and then compared with the data transmitted from the other station. If not, the "normal" message is outputted. It is possible to know whether there is a problem of preference (41 to 43). Referring to FIG. 3B, the main service execution part 24 continuously monitors various alarms occurring in the counterpart station and its own station, detects when an alarm occurs, reports it to a higher processor that is displayed in the corresponding register, and at the same time, the corresponding alarm. An indicator is driven to visually alert the alarm condition (44 to 47). When the alarm process is completed, it is checked whether or not a test request is performed by the higher processor, and if there is a test request, this is performed (48, 49). Requirements detail are matching device circuit and line condition test, channel condition test and remote alarm sending to indicate that the status of the local station can not perform normal service.

In addition, if the operator's test request after the main work, jumped to the test routine to display various offline test menus to test whether or not the normal transmission of the call and signaling (25). If an interrupt occurs from the upper processor during the main task, the main task is suspended and jumped to the real-time processing task to perform the RTC task. The contents of RTC task are to read various signal data given by upper processor, write signal data and alarm data received from large station to common memory, and insert signal data received from upper processor into corresponding position on transmission channel or receive The signal data on the channel is extracted (50 to 56).

The present invention is configured as described above can be included in the electronic switchboard to perform the test of the matching of the relay line and the line and circuit using the CEPT1 (Europe) method. Functions that can be tested include local loop test to test the condition of its own circuit, remote loop test to test the state of the trunk line, and local and remote loop test under the instruction of the upper processor. The result is analyzed and reported to the upper processor if it is not normal, and the corresponding alarm indicator is driven at the same time. As a result, operators can take accurate and rapid actions to increase the reliability of the system.

Claims (4)

Human interface means (5), read buffers (6), onboard processor circuits (7), write buffers (8), TD-bus interface means (9), system bus (10) connected to each means, time switch unit An interface means (1), a T / S switch (2) connected to the time switch unit interface means (1) and a system bus (10), a digital CEPT1 trunk interface means (3) connected to the T / S switch (2), And a line interface means (4) connected to the digital CEPT1 trunk interface means (3), comprising: a first step of initializing various states in the device, and performing the first step after the first step; The second step of testing the condition of the relay line, the continuous monitoring of various alarms occurring in the partner station and the local station after the second step is detected and detected when the alarm occurs and displayed in the relevant register A third step of reporting to the processor and simultaneously driving a corresponding alarm indicator to visually notify the alarm status, and a fourth step of performing a test request if there is a test request by checking whether the test request is performed by the upper processor after performing the third step. And a fifth step of performing a real-time processing task when an interrupt is generated from the upper processor after performing the fourth step. The test request of the upper processor of claim 4, wherein the test request of the upper processor of the fourth step is a matching device circuit and a line condition test, a channel condition test, and a remote alarm transmission request indicating that the state of the host cannot perform normal service. Relay line matching and test method. The real-time processing task of the fifth step reads various signal data given by the upper processor, writes signal data and alarm data received from a large station into a common memory, and writes the signal data received from the upper processor. A relay line matching and test method, comprising inserting at a corresponding position on a transmission channel or extracting signal data on a reception channel. The test of the matching device circuit and the relay line of the second step includes forming a loop circuit including a corresponding test portion, transmitting data of a predetermined pattern, receiving the data again, and comparing the data with the transmission data. Relay line matching and test method comprising the determination of the normality of the test portion.

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