KR910004272B1 - Matching method between remote switching and subscribers system - Google Patents

Abstract

Many remote switching units (20-30 units) are interfaced to the line maintenance system so that the multi-purpose computer in the system tests the remote switching units, stores and analizes the tested results regulary. the method includes steps; (A) transmitting "on-air" message when the request is received during the line detection and continuing the detection; (B) checking the detection request and receiving the message transmitted form a first operator when no detection is executed; (C) transmitting the rejection message when the received message is abnormal and initializing a multiplexer board; (D) checking the receiving stand-by state by finding the coressponding remote switching unit to be detectede; (E) transmitting the error message to the first operator at the receiving enable state; and (F) transmitting the number of the subscriber to the corresponding remote switching unit.

Description

How to Match Remote Switching System with Subscriber Line Centralized Maintenance System

1 is a system diagram for carrying out the conventional invention.

2 is a flow chart of a conventional subscriber line test.

3 is a system diagram for carrying out the present invention.

4 is a flow chart of registration of subscriber line centralized maintenance system according to the present invention.

5 is a form of message implementing the present invention.

* Explanation of symbols for main parts of the drawings

10: host computer 20: ALT

30: multiplexer 40: remote switching device

50: TTY 60: Modem

2S1-2S20: Serial Interface RUS1-R18: Remote Switch

The present invention relates to a subscriber line test method of a remote switching apparatus, and more particularly, to a method for periodically intensively operating and maintaining subscriber lines of each remote switching apparatus through a host computer.

Conventionally, to test the subscriber line of the remote switching unit (Remote Swiching Unit), manually input the data using the TTY, the available TTY is limited to one, so that the system operator to test the subscriber line of the remote switching unit Tests were only possible at locations with TTY.

That is, in the related art, a plurality of remote switching devices (usually 18 remote switching devices) are connected to one mother station as in the first diagram, and one TTY is connected to one remote switching device, and the remote switching is performed through the TTY. The method of measuring the subscriber line of the device proceeded in the same flow as the second degree.

First, in order to test the subscriber line connected to the corresponding remote switching device, the system operator inputs a special character key for the test.In step (A1), the remote switching device analyzes whether it is testable and sends a response message to the TTY. do. The speed of data input and output through the TTY is 300bps. Then, when the operator generates a system number to be tested through TTY, the remote switching device receives the system number in step (A2) and checks whether it can connect with the system in step (A3). At this time, if the connection is not possible in step (A3), the message "Not selectable" is output to TTY in step (A4), and the step is returned to step (A3). If the operator generates a mode conversion signal by this output, and in step (A6), the remote switching device sends all messages generated by the AMU (Alarm Maintenance Unit) to the system mode in lock mode. ) Is a mode that displays in real time, and the communicable mode is a mode in which an operator can input a command and display the result.

If the operator receives a parameter of the content to be tested through the TTY in step A7 after performing step A6, the reception parameter is changed back to TTY in order to prevent the operator from inputting a parameter in step A8. Output After that, it checks whether the receiving parameter is normal in step (A9), and checks whether all parameters are received in step (A10) when it is normal. This is done by detecting the return key (returm key) at the last parameter input. If it is not a parameter, go to step (A11), select the next parameter and go back to step (A7).

At this time, if the mode parameter is received in step (A10), in step (A ₁₂ ), the corresponding remote switching device outputs a test result of the reception parameter as a TTY.

Since the subscriber line test method for the conventional remote switching device as described above can use only TTY as an input / output device, it is not possible to communicate diagnostic data between an arbitrary remote switching device and a mother station. The subscriber line test could not be concentrated and preserved, and the information about the remote switching device was also output only through the TTY.

Accordingly, an object of the present invention is to provide a method for periodically testing subscriber lines of all remote switching devices by connecting a plurality of remote switching devices to a line centralized maintenance system.

Hereinafter, the present invention will be described in detail with reference to the drawings.

3 is a system diagram for carrying out the present invention. As a centralized operating station, the host computer 10 which is in charge of the overall operation of the subscriber line centralized maintenance system and the centralized management station are controlled again by the centralized management station under the control of the host computer 10. An ALT 20 that serves as a sub-central operator station, a multiplexer board 30 connected to the ALT 20 to selectively control a plurality of remote switching devices connected to one mother station, and 18 units per one multiplexer Remote control unit 40 which performs the exchange function of the corresponding remote station under control of the mother station, and one remote control unit 40 connected to the multiplexer 30 by one of the multiplexers 30 to test the remote switching unit 40 connected to the multiplexer by the system operator. And a modem 60 connected between the ALT 20 and the multiplexer 30 to perform long distance communication, and FIG. As a connection diagram of the multiplexer board 30, the multiplexer board 30 includes a board control microprocessor 31, a ROM 32 for storing a program, a RAM 33 for storing data, and a host. A first serial interface SI31 for serially interfacing with the computer 10, a second serial interface SI32 for serially interfacing with the TTY 50, and a third serial interface SI41 for serially interfacing with 18 remote switching devices, respectively. -SI48).

3 is a flow chart of the present invention, the first step of informing the subscriber line group that it is in use when another use request is requested, and continuously performing the corresponding diagnosis operation, and checking whether the operator requests a diagnosis when the first step is not being diagnosed. In response to the request from the first operator, the second process of receiving the message of the first operator and after analyzing the configuration of the received message after performing the second process, sends an abnormal rejection message to the first operator and sends the multiplexer board. A third process of initializing, a fourth process of checking a reception ready state by searching for a remote switching apparatus to be diagnosed in a received message when the configuration of the received message is normal in the third process, and receiving at the fourth process The fifth process of sending a data transmission error message to the first operator and status of the multiplexer board In the fourth process, check whether the subscriber group number is found in the received message at the time of receiving a reception state and transmit it to the corresponding remote switching apparatus and respond. If there is no response, the sixth process returns to the fifth process, and the sixth process. Checks the subscriber's number in the received message and sends it to the corresponding remote switching device and responds. If there is no response, the process returns to the fifth process and the number of diagnosis result messages when the response is made in the seventh process. Set the counter according to the test and check whether all the test result messages have been received within a predetermined time, and if the test result is not received, the eighth process proceeding to the fourth process and the fifth process, and the test result message in the eighth process. If a message is received, it analyzes the contents of the diagnosis message and checks whether it is a normal diagnosis result, and formats the message. A ninth process of transmitting to the first operator side and initializing the multiplexer board; and a tenth process of formatting a message for a corresponding state when the abnormal state occurs in the ninth process, transmitting the message to the first operator and initializing the multiplexer; In the second step, when the second operator requests, the eleventh step of diagnosing the corresponding subscriber line through the TTY and outputting the result to the TTY.

5 is a message form diagram for implementing the present invention, (5A) is a message form diagram transmitted when the host computer 10, which is the first operator, diagnoses the remote switching apparatus by the multiplexer board 30, (5B) Is a reception completion message form transmitted to the host computer 10 when the multiplexer board 30 receives a message such as (5A) in a normal form, and (5C) receives a message such as (5A) in an abnormal form. When the rejection message is sent to the host computer 10, 5D is a form of sending a diagnostic result message from the multiplexer board 30 to the host computer 10. Based on the above-described configuration, the present invention will be described in detail with reference to FIGS.

The present invention is to implement a Subscriber Line Maintenance and Operation System using a general-purpose computer to efficiently perform subscriber line diagnosis, data management, and statistical analysis for each telephone station. In this case, the configuration may be configured as shown in the third diagram, wherein the host computer 10 performs the function of the central office, and can diagnose all remote switching devices connected to the central office, and store the diagnostic information. Do this.

At this time, since the host computer 10 cannot be dedicated to the entire area, the host computer 10 again divides the area managed by the host computer 10 to provide a plurality of ALTs 20 to perform the functions of the sub-intensive operation stations. The multiplexer board 30 performs a function of matching a plurality of remote switching devices 40 connected to one mother station so that the host computer 10 can diagnose the subscriber lines connected to each other, and also the operator through the TTY 50. To diagnose the subscriber lines of all the remote switching devices 40 connected to the multiplexer board 30. At this time, 18 remote switching devices are connected to one multiplexer.

The multiplexer board 30 is connected to the host computer 10 via the ALT 20 and the modem 60 using respective serial interface units, and is also connected to the remote switching device. Since the first interface SI31 receives a message from the host computer 10 through the modem 60, the first interface SI31 has a transmission speed of 1200 bps equal to the modem speed, and the second serial interface SI32 is a TTY used by an operator. Since it is connected to 50, it has a transmission speed of 300bps.

The present invention will be described with reference to FIGS. 4 and 5 as a method of matching a diagnosis process between a host computer managing a subscriber line centralized maintenance system and a remote switching device connected to the system. In operation (B1), it is checked whether an operator is communicating with a specific remote switching apparatus through the multiplexer board 30. At this time, in step (B2), the microprocessor 31 checks whether the first operator is communicating with any remote switching device by checking an action bit stored in a specific area of the RAM 33. Here, it is assumed that action bit 0 is in an idle state, action bit 1 is in a state in which a first subscriber is in communication, and action bit 3 is in a second state in a communication state. Therefore, if the first subscriber is busy (action bit 1 is set) in step (B2), the second operator is examined by examining input terminals (Tx buffer) of the first and second serial interfaces SI31 and SI32 in step (B3). When the request outputs the occupancy message to the TTY (50) and proceeds to step (B5) to continue the work that was being performed, the first operator ignores the data received in step (B6) when requested (B5) Proceed in stages. In addition, if the second operator is in use in step (B3) (action bit 2 is set), steps B8 and B10 are performed to send the occupied message to the host computer 10 when the first operator requests it. Will continue to run, and upon request of the second operator, ignore the input data and continue the work that was being performed.

However, when the first operator requests the subscriber line diagnosis of the remote switching apparatus in a state not in use as described above, the microprocessor 31 recognizes this through the input terminal of the first serial interface SI31 in step (B11) (B13). In step), a continuous message generated from the host computer 10 is received. After that, perform the steps (B14)-(B21) to check whether the message has the same form as (5A). First, check whether the message is composed of 10 bytes. If the number of bytes is normal, the first byte is the multiplexer board. The character (eg "-" or "") signifies the beginning of the message as an arbitrary character between (30) and host computer 10, and the second byte is a channel number (in the range 0-9). Digits), the third byte must be the ALT number (digits in the range 0-9), the fourth and fifth bytes must be the number of the remote switch (digits in the range 0-17), and The seventh and seventh byte must be a line group number (digits in the range 1 to 22), the eighth and ninth bytes must be subscriber numbers (digits in the range 1 to 24), Heat The second byte is a special character that indicates the end of the message, and is also expressed as an arbitrary character between the multiplexer board 30 and the host computer (for example, "1" or "<"). Must not be equal to).

At this time, if any of the steps (B14) to (B21) differs from the message type defined as (5A), it is determined to be an error, and steps (B52) to (B53) are performed to reject messages such as (5C). After formatting and sending the data to the host computer 10 and initializing the multiplexer board 30, the diagnostic program ends.

However, in the steps (B14) to (B21), when receiving the same message as the message type as in (5A), the microprocessor 31 sends the received completion message such as (5B) to the host computer 10 and then receives the received message. Analyze the message sent to the remote switch 40. First, the microprocessor 31 performs steps (B23) to (B26) to find the number of the remote switching device 40 by analyzing the fourth and fifth bytes of the receiving end message as shown in (5A). Connect the I / O interface connected to 40). In addition, the remote switching device 40 switches from the non-communication mode (lock mode) to the communication available mode (Unlock mode) and checks whether a message can be received. When not in the communication enabled mode, the microprocessor 31 performs the steps (B55) to (B57) to format the data transmission error message to the host computer 30 and initialize the corresponding multiplexer board 30. Quit.

However, when the corresponding remote switching device 40 is converted to a state in which the message can be received by performing steps (B23) to (B26), it is necessary to perform steps (B27) to (B30) to receive six messages from the received message such as (5A). The first byte and the seventh byte are analyzed and the subscriber group number (Line group No) is transmitted to the corresponding remote switching device 40. After that, the response of the corresponding remote switching device 40 is checked, and if there is no response within a predetermined time (about 15 seconds), steps (B55) to (B57) are performed as described above.

At this time, if there is a response from the corresponding remote switching device 40 within a predetermined time by performing steps (B27) to (B30), perform steps (B31) to (B34) to receive the eighth message received as shown in (5A). The byte and the ninth byte are analyzed and the subscriber number (Line card No) is transmitted to the corresponding remote switching device 40. Thereafter, the presence or absence of a response of the corresponding remote switching device 40 is checked. If there is no response within a predetermined time (about 15 seconds), steps (B55) to (B57) are performed as described above.

However, if there is a response signal within a certain time, go to step (B35) to set the counter value to count the number of diagnostic result messages. In other words, it is to count the total number of bytes of message about the result of diagnosis. Thereafter, the process of (B36)-(B38) is performed, and the information on the corresponding subscriber line diagnosed by the remote switching device 40 is received by increasing the counter value. In step (B37), a predetermined time (50 seconds) has elapsed. If it is not received afterwards, proceed to step B39 to check whether the diagnostic result message currently being received is repeatedly executed. This is because when an error message is not received within a certain time, an error occurs. Therefore, the diagnostic result message is only received once. Therefore, if the error occurred at the first reception in the step (B39), the process returns to the step (B23) and repeats the above steps, and if the error occurs repeatedly, the steps (B55) to (B57) are performed. Error handling

In this case, when all the diagnosis result messages are received in step B36, the microprocessor 31 analyzes the counter to determine the size of the diagnosis result message and then analyzes the contents of the message in step B41. . In step (B42), when the analysis contents are normal in the diagnosis result message, proceed to step (B43), format the message as (5D), and then, in step (B44), connect the first serial interface (SI31) and the modem (60). The diagnostic result message is transmitted to the host computer 10 through the host computer 10. After completion of transmission of all the messages formatted in the step B45, the multiplexer board is initialized and terminated in the step B46. The maximum message is 256 bytes.

If the diagnostic result message includes abnormal contents in step (B42), the contents are analyzed to determine whether the test is repeated. That is, in step (B47), the busy state of the subscriber or the parking (parking) state is formatted in step (B48) so as not to perform the repetitive test, and then step (B44). At this time, the message is the minimum byte and 6 bytes (BUSY PARKING).

However, in step (B49), a repeated test is performed in an aborted state such as a subscriber line short circuit or a test unit is inoperable state. Proceed to step) to handle the error.

In addition, if the first operator does not request in step (B11), it checks whether the second operator requests in step (B12), and when the second operator requests, the subscriber line diagnosis is performed through the TTY 50 as described above. After receiving the parameter for diagnosis and output the result through the TTY (50).

As described above, since a plurality of remote switching devices (2 or more and 30 or less) and a remote subscriber line centralized maintenance system can be interfaced, the subscriber measurement of the remote switching device can be performed using a general-purpose computer, and the measurement results are stored, analyzed, In addition, it is possible to perform the measurement periodically by intensively operating a plurality of remote switching devices, and at the same time, it is possible to efficiently perform the operation and store the result.

Claims (1)

As a centralized operating station, a host computer that controls the overall operation of the subscriber line centralized maintenance system, a remote switching device that performs a remote switching function under the control of the mother station, and a multiplexer board that selects a plurality of remote switching devices under the control of the host computer. In the matching method of the remote switching system and the subscriber line centralized maintenance system, the first process (B1-B6) to notify that the busy state is in use when requesting another use during the subscriber line diagnosis and continue to perform the corresponding diagnostic work, and the first A second process (B8-B21) for checking whether the operator requests a diagnosis when the diagnosis is not performed in steps B1 to B6, and receiving a message of the first operator when the first operator requests; and the second process ( B8-B21) Analyze the configuration of the received message after performing and send the abnormal rejection message to the first operator and execute the multiplexer board. A fourth step (B52-B54) for performing vaporization and a second switch (B8-B21) after performing the second step (B8-B21), when the configuration of the received message is normal and the remote exchange device to be diagnosed in the received message is checked for a reception ready state; A fifth step (B55-B57) for transmitting a data transmission error message to the first operator and initializing the multiplexer board during the step B22-B26 and the fourth reception step (B22-B26). In step 4 (B22-B26), it checks whether the subscriber group number is found in the received message at the time of receiving available status and transmits to the corresponding remote switching apparatus and responds. If there is no response, the 6th step returns to the fifth process (B55-B57). In the process (B27-B30) and the sixth process (B27-B30), it checks whether the subscriber number is found in the received message and sent to the corresponding remote switching device and responds. If there is no response, the fifth process (B55-B30). Back to B57) In response to the seventh process (B31-B34) and the seventh process (B31-B34), a counter is set according to the number of diagnosis result messages, and it is checked whether all the test result messages have been received within a predetermined time, and if it is not received, iterates. When the test result message is received in the eighth process (B35-39) proceeding to the fifth process (B55-B57) and the eighth process (B35-B39), the contents of the last message are analyzed to be normal. In the ninth process (B40-B46) for checking whether the diagnosis result or not, and formatting the normal temporary message and sending it to the first operator and initializing the multiplexer board, and the abnormal state in the ninth process (B40-B46). Formatting the message to send to the first operator side and initialize the multiplexer in the tenth step (B47-B48), and when the second operator requested in the second step (B8-B21) to diagnose the subscriber line through the TTY With TTY And an eleventh process (B58-B68) for outputting the result.

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