KR920000083B1 - Remote operation and maintenance method of exchange - Google Patents

Abstract

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Description

Remote operation and maintenance method of exchange

1 is a system network diagram for carrying out the present invention.

2 is a flow chart of a remote terminal function according to the present invention.

3 is a flow chart of a remote file transfer function in accordance with the present invention.

4 is a flowchart of a remote data conversation function according to the present invention.

5 is a message frame format for remote file transmission according to the present invention.

6 is a file transfer protocol flow chart according to the present invention.

* Explanation of symbols for the main parts of the drawings

10: switch 20: M & A terminal

30: public telephone network 40: branch exchange

50: computer terminal of the remote operation center 60: modem

The present invention relates to a method of operating and maintaining an exchange, and more particularly, to a method of operating and maintaining an exchange in a computer terminal of a remote operation center.

Typically, the exchange includes M & Terminal A (Maintenance and Administration Terminal) is installed.

M & installed in the exchanger; The function of the A terminal facilitates maintenance, administration, and operation of the exchange by performing MMC (Man-Machine-Communication) between the exchange and the terminal. The M & Looking at the functions performed as MMC during terminal A and exchange period, system data (call processing related data), subscriber data, relay line data output and change, various traffic related information output request, system failure information output, service for each subscriber It is easy to operate and maintain the system through input and output of various information such as telephone number, service function, registration and cancellation of subscriber class, and so on.

M & When the operator for maintenance professionally resides at the location of the exchange where the A terminal is installed, the above M & There is no restriction on the operation of the exchange using the A terminal.

However, in recent years, due to the burden of labor costs, there are many cases in which the operator for professional maintenance does not reside in the place where the exchange is installed, which is a problem when a professional operator is needed for the operation or maintenance of the exchange.

On the other hand, even if there is an operator who specializes in exchanges, the operating personnel of the exchanges have the M & It was a manual operation to print out the state of the exchange through the A terminal, and to maintain and operate the state exchange of the printed exchange.

Therefore, in the related art, a professional operator always resides at each place where the exchanger is installed (this is called a site), so that the operation and maintenance of the exchange system can be performed smoothly.

Accordingly, an object of the present invention is to provide a method for operating and maintaining each site switch as a computer of a remote switching center through a Public Switching Telephone Network (PSTN).

Another object of the present invention is to provide a method of mutually transferring a loading file and a mail file between a computer of a remote switching center and a site exchanger through a PSTN.

Another object of the present invention is to provide M & The present invention provides a method for performing a data conversation function with terminal A.

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

1 is a system network diagram for carrying out the present invention, reference numeral 10 denotes a Central Processing Unit Module (CPM) 1 for controlling all operations of an exchange as an exchanger, and a subscriber line circuit for controlling a subscriber's call. (2), TLC (Trunk Line Cicuit) (3) for controlling calls on a central office line, modem (4) for demodulating and demodulating input / output signals, and other switching of T-SW (Time Switch) It is a known exchange system incorporating a circuit necessary for the.

Reference numeral 20 denotes M & The MMC is executed with the CPU 1 of the switch 10 as the A terminal. 30 is a public switching telephone network (PSTN). 40 is a private exchange, which is connected to the PSTN 30 to provide a communication path with the computer terminal 50 of the remote operation center described later, and may not be configured in the present invention. Reference numeral 50 denotes a computer terminal of a remote operation center (hereinafter referred to as a Remote Computer Terminal; ″ RT ″). It performs the function of terminal A and file transfer.

Reference numeral 60 modulates and demodulates the input / output transmission data of the RT 50 as a modem to be transmitted or received to the PSTN 30. In FIG. 1, the exchange 10 is to be operated and maintained by the control of the RT 50, which may be a private exchange or a trunk line exchange having a large capacity.

In the description of FIG. 1, reference numeral 5 denotes a Co (Central Office) line, and 6 denotes a subscriber line of the SLC 2, to which a telephone number of the exchange 10 is assigned. That is, when the exchange 10 is a private exchange PABX, the lines 6 are lines with respective extension numbers. And the symbol "7" is a serial communication line, the R-S-232C line can be used.

FIG. 2 is a flow chart of a remote terminal function according to the present invention. When command data regarding operation and maintenance is input from the RT 50, the input data is inputted to the switch 10 through the PSTN 30 network, and the switch 10 Performs the function of the input command and transmits the result message to the RT 50 through the PSTN 30 network, and the RT 50 outputs the input data on the display of the RT 50 and stores it as a file. In FIG. 2, (a) is a flowchart of the RT 50, and (b) is an operation flowchart of the CPM 1 of the exchange 10.

3 is a flowchart of a file transfer function according to the present invention, which is a flowchart of the protocol capability between the RT 50 and the CPM 1 of the exchange 10, and shows the flow between the RT 50 and the CPM 1 of the exchange 10. It is a flowchart to transmit a predetermined file by protocol communication.

4 is a flowchart of a data conversation function according to the present invention, wherein M & The A terminal 2 transmits the character data between the remote terminal 50 and the RT 50 to perform a conversation function.

5a-d show different data formats in accordance with the data frame format and frame type according to the present invention. In this case, the field description of FIG. 5A is as follows.

SOH (Start of Header); Transmission mode when 01H as 1 byte

DEST (Destinatron Address); OOH as one byte; Remote computer (RT) 50 10H-EFH; Each site exchange identification FFH; Broadcast all site exchanges

LENGTH (Frame Length); It represents the number of bytes from the SEQ field to the BCC field, that is, the number of bytes of the frame Byte, and is composed of 2 bytes. The LENGTH value is a binary value, and a lower byte “L” is transmitted first, and a higher byte “H” is fixed to OOH. The value of LENGTH is a frame (Frame type No. 00, 01, 06, 07) 04H that does not have a data field.

Frame Sequence Number (SEQ); It represents a sequence number of frames transmitted as one byte and uses a Modulo OFH value. In other words, the range of SEQ is OOH to OFH. The SEQ (Frame Sequence Number) shown in FIG. 5A is operated independently by the remote computer RT 50 and the guide exchange, and when the frame sequence number is incorrect, the receiver requests retransmission as NAK (Nagative acknowledgment).

It is composed of 1 byte, meaning TYPE (Frame Type).

That is, the message type of the current frame is shown as follows according to the value of 1 byte.

00H: Acknowlodge (ACK)

01H: Negative acknowledgment (NAK)

02H: Initiate

03H: File Header

04H: Data

05H: End of File (EOF)

06H: End of Transmission (EOT)

07H: Error

DATA (Data Field)

An area in which data according to the contents of the TYPE of the data frame is recorded. The data field has a TYPE value of 02H, 03H, 04H, and 07H in a data frame. If the value of the frame type in the data feed is 02H, 03H, or 04H, the data feed is shown in degrees 5b, c, and d. If the frame type value is 07H, the size of the data feed is 11 bytes. The contents according to the data feed value are as follows.

* Error Frame (Frame Type No; 07H)

00: System Error

01: Initiate Parameter Error

02: Write Protect Error

03: Time Out Error

04: State / Event Error

05: Abort

When an error frame occurs, the sender and receiver both reset the current site switch and display or store the contents of the error.

Block Check-Sum Code (BCC) A check sum value in bytes from the SOH feed to the end of the data feed, which is valid up to 16 bits.

6 is a flowchart of a file transfer protocol according to the present invention, (a) is a flowchart of transferring a file from the RT (50) to the exchange 10, and (b) is a file from the exchange (10) to the RT (50). It is a flow chart to transmit.

The flowchart of (a) (b) uses a stop and wait automatic request.

The file transfer protocol starts at the Initiate Frame and ends at the End of Transmission or Error Frame.

The transmission termination at the error frame is processed in both sites, that is, the RT 50 and the exchange 10 in the initial state of the file transfer mode, but the transfer end frame is transferred from the file transfer mode to the online command mode. Transition.

Hereinafter, an operation example of the present invention will be described in detail with reference to FIGS. 1 to 6.

First, M & An example of the basic format of the command that can be executed in the A terminal 20 and an example thereof are shown.

M & Basic Forms and Types of Commands Performed in A Terminal 20

* Basic format (example)

＞ (or #): Prompt

LSTN: Group Command

ATT: Sub Command

432 Argument

; P: Option (Option appears after “;”)

Type of option:; P (print); C (clear); a (append); d (delete)

Explanation of Basic Formats (eg> LSTN ATT 432; P)

The LITN ATT (= List Station Attribute Data) command is used to output data representing characteristics for a specific extension number 432. option '; P 'is the output message M & It is a command to display on the A terminal 20 and to print at the same time.

* An example of the basic format

Group Command, LSTN (List Station Data) means to output the information of a specific station, and Sub Command, ATT (Attributes) means the basic characteristics of a specific station (ie. Multiple subcommands can be assigned to a group command by requesting an assigned group, the number of a port to which the corresponding station is connected, a service class, etc.>.

'432', a variable or argument, is the telephone number of the particular extension you are requesting. ‘; P is an option, ';' stands for option, and 'P' stands for print. Namely, the basic characteristic of the extension telephone number 432 is M & It outputs to the A terminal 20, and at the same time print out to the printer connected to the system.

Types of Commands (I'll just give you an example of a group command with too many types of commands.)

Group Command Meaning

LSYS (List System Data): Require output of system related information

RSYS (Revise System Data): Request to change information related to system-wide

LSTN (List System Data): Request to output information related to specific extension

RSTN (Revise System Data): Request to change information related to specific extension

LTRK (List Trunt Data): Request to output information related to specific trunk line

RTRK (Revise System Data): Request change of information related to specific trunk line

LATC (List Attendant Console Data): Request output of related information in specific relay

RATC (Revise Attendant Console Data): Request to change related information within a specific relay

LDAT (List Data Line Data): Request to output information related to a specific data line

RDAT (Revise Data Line Data): Request to change information related to a specific data line

LCD Call (List Call Detailed Accounting Data)

RCDA (Revise Call Detailed Accounting Data): Request to change information related to billing

LTRF (List Traffic Data): Request to output information related to various traffic

TEST (Test): Request for various tests

BLOK (Block System Resources): Request for service exclusion of various system resources

UBLK (Unblok System Resources): Request to release service exclusion of various system resources

CNTL (Control System): System Control Request

LERR (List Error History): In-system fault information output request M & All types of commands used as described above in the A terminal 20 can be used as they are in the RT 50, and such commands are currently used in the exchange 10 and the M & It is an MMC used between the A terminals 20. At this time, M & The command inputted from the A terminal 20 and the command inputted from the RT 50 are the same. If a file name is further added after the command inputted from the RT 50, the RT 50 changes into the switch 10. The command result message received from is saved in the system as a file name. If a file name is not added to the command input from the RT 50, the result message received from the exchange 10 is output to the display unit (for example, CRT) of the RT 50 and stored as a file. It doesn't work.

In the system network diagram as shown in FIG. 1 now, the M & In order to perform the function of A terminal 20, the following conditions (a) to (g) must be preceded. In RT 50, (a) M & You need to run the soft wore package for A. (B) After that, the operator of the RT 50 must input a modem 4 telephone number assigned to each call line 6 of the SLC 2 in the switch 10 using the keyboard in the RT 50.

When the modem 4 telephone number of the switchboard 10 is input as described above, (c) the RT 50 controls the modem 60 to dial to access the modem 4 in the switchboard 10. At this time, the dialing signal of the modem 60 is transmitted to the TLC 3 of the exchange 10 through the PSTN 30, and the dialing signal of the modem 60 input to the TLC 3 is operated by the switch 10. Is connected to the internal modem (4). (D) When a response signal (Carrier; Answer tone) is outputted from the modem 4 of the switchboard 10 that inputs the dialing signal and is transmitted to the modem 60, the RT 50 and the switchboard 10 The modem 4 is connected via the modem 60. (E) At this time, the operator of the RT 50 selects the remote terminal function as a menu. (F) After the operator enters the log ID and password (Login) for the login (Login) of the exchange 10 in the RT (50). (G) If the log ID and password are correctly entered, the operator of the RT 50 determines the M & It will be used as a terminal to execute A commands.

When the remote maintenance and operation can be performed by the above process, that is, when the data communication path is established with the CPM 1 in the RT 50 and the switch 10, the RT 50 generates a new command code. Retrieves whether is entered. If the command code inputted by the user's key press is a command code for operation and maintenance of the exchanger 10, the RT 50 simply indicates that the command code was input in the process of FIG. Save it in step (2b). Upon completion of storing the input command data in step b), the RT 50 searches whether the full-layer command CR is input in step 2c. If it is determined in step (2c) that the transmission command (CR) has been input, the RT (50) accesses the command code saved in the internal storage area in step (2d) and outputs it through the modem (60) and (2e) Enter the standby state. At this time, the modem 60 modulates the command code from the RT 50 and transmits it to the TLC 3 of the exchange 10 via the PSTN 30 (or PABX 40 and PSTN 30).

On the other hand, the command code received by the TLC 3 is transmitted to the modem 4 via the line 6 through the SLC 2 by the time switching operation of the exchange 10. The modem 4 demodulates the command code transmitted from the remote modem 60 and inputs it to the CPM 1 through the communication line 7 which is an RS-232C line.

Therefore, the CPM (1) that searches for the command code as shown in (2i) determines that the command code has been input by inputting the command code from the modem (4), and analyzes the input command code in the process (2j). do. In the process of (2j), the analysis of the command code searches whether the group command and the sub command are properly input and the argument value is input within the given range.

The CPM 1 analyzing the received command code as described above searches whether an error has occurred in the command analyzed in step (2K). If an error occurs in the command input in step (2K), the CPM 11 formats the error content in a message output form in step (21). If the error does not occur in the process (2K), the CPM (1) performs a command function in the process (2m) and formats the execution result into a message form to configure the data. The CPM 1 that has performed step 21 or step 2m inputs the result message configured in the form of a message in the above steps in the modem 4. The output data of the CPM 1 input to the modem 4 is input to the modem 60 through a communication path already formed.

Therefore, the output message of the CPM 1 modulated and output by the modem 4 is demodulated by the modem 60 and input to the RT 50. At this time, the RT 50 in the standby state receives the message in step 2f. Judging that it is entered. The RT 50, which inputs the message output from the CPM 1 of the exchanger 10, displays it in step (2g) and stores it as file data on the disk in step (2h).

8 (2m) of the process of FIG. 2 is to perform a function for the command sent from the RT (50). For example, >> LSTN STS 432 ⓐ When the LSTNSYS command is input from the RT 50, the switch 10 displays information on whether the extension number 432 is in a serviceable state or a failure state. Access and output the information of whether the call is not in progress or in a call, and information of which extension the other party is on the call. In order to perform the file transfer function, the operator of the s) inputs a command for the state transition of the exchange to the RT 50 as a command, which is input to the CPM 1 in the exchange 10 through the above-described path. At this time, the exchange 10 transitions to a state waiting for a protocol for file transmission, and the RT 50 exits from a remote terminal state and displays a menu.

When the operator selects a menu for file transfer in the above state, the RT 50 determines that a file transfer command has been input in the process of FIG. 3 (3a). Information) Search in step (3b). The inflation for file transfer is data such as file type, file name, destination address to be stored in the exchange 10, and the like. The reason for transmitting the file is that the installation data of each exchange is updated at the remote maintenance center RT 50 and transmitted to the site exchange 10 (File). Required when down loading by transfer. In addition, the installation data of each site is transferred to the remote maintenance center RT (50) for pre-backup, and then stored again when the data in the site exchange system (10) is deleted. It is used to transfer from the RT 50 to the exchange. File types are classified into load files and mail files. Load files mean installation data or programs to be loaded and executed in memory in the exchange 10 system. The mail file is a means for communication between operators between the remote maintenance center and the site where the exchange is installed, and sets a specific memory area to be accessed by the operator of the exchange site of the remote maintenance center as a mailbox. Save it there.

If the above-described inference for file transmission is input, the RT 50 determines that the transmission for transmission is input in step 3b. In step (3b), the RT 50 determines that the input is input, and then, in step (3c), the RT 50 configures information necessary for file transmission in a data frame format as shown in FIG. 5 and links it as a process protocol as shown in FIGS. Establish and send and receive files. That is, in the initial process of FIG. 6a, a value of 02H is displayed on the TYPE of the data frame of FIG. 5 to indicate the initial data, and the same data as in FIG. 5b is transmitted. Thereafter, when the exchange 10 receives a response to this in a stop-and-wait auto-request method, the data is transmitted by changing the frame type (TYPE) as described in the data frame format of FIG. 5d.

On the other hand, the CPM 1 in the switch 10 transitioned to the file transfer state establishes a link by the protocol in the process of FIG. 3 (3d), stores the received file in the memory, and retrieves whether the reception ends in the process (3e). . When the reception is completed, it is analyzed in step (3f) whether the received message is a reception file or a command for requesting file transmission to the RT (50). If the file is not in the transmission state, the receiving file activates the system in step 3i.

If the inflation of the file transmission of the RT 50 is to receive the insulation data of the exchange 10 and store it for backup, a command that is a one-byte area of an Initiate Frame as shown in FIG. 5B. Contains 02H instead of 01H. In this protocol, file transfer is performed by the flow of FIG. 6b. In the initial process Initiate (0) of FIG. 6B, the command value in the file of the starting frame data is transmitted with 02H as described above. When the exchange 10 receives it, it transmits an acknowledgment (Acko) and the RT 50 which receives it transmits the file header of FIG. 5c. At this time, the exchange 10 transmits a response ACK1 to the file header reception to the RT 50.

Receiving a response to the file header transmission, the RT 50 receives a segment and an offset of a memory that needs to transfer a file from the exchange 10 to the RT 50 at the feed of a data frame as shown in FIG. offset) and the data size to be transmitted. In this case, the field size of the data frame is 6 bytes in length since no data is loaded. The exchange 10 receiving the data saves it to a memory (3d) and transmits a response (ACK2) thereto. The RT 50 receives the data data 3 indicating the end of the file. send. When the exchange 10 receives the data Data 3, the file is said to have been received, and a response (ACK3) is sent. After the delay of several seconds, the RT 50 and the exchange 10 change states of reception and transmission. Make a transition (3g process). Thereafter, the exchange 10 accesses the data according to the file transmission infor- mation and transmits the file by the transmission flow protocol of FIG. 6b in step 3h. At this time, the RT 50 receiving the file transmitted from the exchange 10 stores it as a file in an area such as a disk.

On the other hand, as described above, when the operator inputs the remote data conversation function command using the keyboard in the remote terminal state, the RT 50 determines that the conversation mode command has been input in the process of FIG. It transmits to the exchange 10 through the above-described communication path. The CPM 1 of the exchange 10 receives the conversation command code transmitted from the RT 50, transitions the system to the conversation mode with the RT 50, and checks whether character data is received in step 4h. . On the other hand, the RT 50 having transmitted the conversation command code checks whether character data has been input from the keyboard in step 4b. The character data input in step (4b) recognizes the character data input by the user. If it is determined that data is input in step (4b), the RT 50 stores the data in the internal memory in step (4c). Thereafter, when the user inputs the transmission key, the RT 50 determines the input of the transmission key in step 4d and transfers the character data stored in the memory through the modem 60 and the PSTN 30 in step 4e. To 10).

As described above, the RT 50 having transmitted the character data searches whether the character data is received through the modem 60. When the character is not received, the process is repeated from step (4b), and when the character is received, the receiving character is displayed through a monitor (Virtual Display Unit) of the RT 50 in step (4g).

On the other hand, the CPM 1 of the exchange 10, which has been searching for the character reception state, transmits data from the RT 50 and inputs the M & This is outputted to the A terminal 20 so that the M & Display on the monitor of the A terminal 20. Therefore, the character data input by the user of the RT 50 using the keyboard is M & As shown in the A terminal 20, the character transmitted by the user of the RT 50 is M & The operator of terminal A 20 will see.

The character received as described above is M & The CPM 1 displayed on the display device of the A terminal 20 is M & It is searched whether character data is input from the A terminal 20. The M & The character data input from the A terminal 20 is M & This is data input by the operator (user) of the A terminal 20 using the keyboard, which is a response message to the character transmitted from the RT 50. The M & When the character data is input from the A terminal 20, the CPM 1 stores the character data in the internal memory in the process of 4K, and the transfer key data in the process of M & Search for input from A terminal 20. M & When the user of the terminal A 20 inputs the transmission key, the CPM 1 transmits the character data stored in the internal memory area (4m) to the modem 4 and the PSTN in step 4m. By transmitting to RT 50 via RT 30 and M & The character data conversation mode between the A terminals 20 is executed.

As described above, the present invention can perform the operation and maintenance of the exchanger connected to the PSTN network as a computer of a remote operation center through the PSTN network.

1) It is economical because there is no need for operation personnel to reside at each exchange site, and the need to dispatch operation personnel from the after-service center to each exchange site is reduced.

2) Experts in remote operation centers increase their expertise and utilize common equipment by operating and maintaining exchangers located in various locations through dedicated computers.

3) The operation site is not dispatched to the site in which the troubled exchange is installed, and the exchange is accessed through the remote operation center computer.

4) Through the remote operation center computer, the periodical diagnosis of the exchange at each site is performed automatically by the automatic reservation function by the timer, contributing to improving the reliability of the exchange.

5) Efficient version management is easy because the program of the exchange at each site is kept and managed in the remote operation center computer.

Claims (2)

A method of remotely and maintaining a switch 10 having a maintenance terminal 20 at a remote maintenance center computer 50 via a PSTN 30, wherein the input command is a maintenance command or a file transfer command. In the first step (2a, 3a, 4a) of searching whether the command is a conversation mode command or the first command (2a, 3a, 4a), when the input command is a command, the input command is saved in a register and the transfer key is input. When the second step (2b, 2c) and the search results of the second step (2b, 2c) is determined that the transmission key is input, the stored command code is transmitted to the exchange 10 and the result message is input. The third step (2d, 2e, 2f) of performing the standby mode until the second time, and the fourth step (2f, 2g, displaying the result message input time for the maintenance command code from the exchanger 10 and storing it as a file). 2h), and in the first step (2a, 3a, 4a) the input command is a file transfer command A fifth step (3b) of retrieving whether the input for file transmission is input at the time of high determination, and the exchanger (10) by the protocol when it is determined that the input for file transmission is input in the fifth step (3b). A sixth step (3c) of establishing a link with a file and transmitting and receiving a file; and a seventh step (4b) of storing character data input when the input command is an interactive mode command in the first step (2a, 3a, 4a). 4c) and an eighth for transmitting the stored character data to the exchange 10 when the transfer key is input after performing the seventh steps 4b and 4c, and displaying the character data transmitted from the exchange 10. Remote operation and maintenance method on a remote maintenance center computer, characterized by the steps (4f, 4g). A method of remotely operating and maintaining a switch 10 having a maintenance terminal 20 to a computer 50 of a remote maintenance center via a PSTN 30, comprising: from a computer 50 of the remote maintenance center; A first step of transitioning to the maintenance mode, the file transmission mode, and the conversation mode by the transmitted command; and a second step of analyzing whether the error occurred by analyzing the maintenance command code input when the maintenance mode is entered in the first step. If it is determined that an error has occurred in the input command in steps 2i, 2j and 2k and the second steps 2i, 2j and 2k, the error content is configured in the form of an output message and transmitted to the remote maintenance computer 50. A third step (2l, 2m, 2n), and a fourth step (3d) for establishing a link with the computer 50 by a protocol and storing the received file data when the input command in the first step is a file transfer command. ) And file data Upon completion, the messages received after the fifth step (3e, 3f) and the fifth step (3e, 3f) of transitioning to the online service to operate the system under the received file data are displayed. A sixth step (3g) of searching for a received file or a command for requesting file transfer; and a seventh step of operating the system by the received file when the file is transmitted and non-transmitted in the sixth step (3g). (3h, 3i) and the character data transmitted and received from the computer 50 when the reception command of the first step is the interactive mode command are displayed on the maintenance terminal 20, and the character to be transmitted is maintained. Character data stored when the transmission key is input after performing the eighth step (4h, 4i, 4j, 4k) and the eighth step (4h, 4i, 4j, 4k) for storing the character data upon input from the terminal 20. It consists of the ninth step (4l, 4m) for transmitting to the computer 50 And a remote maintenance method for a heat exchanger according to the remote maintenance computer-ranging.

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