JP2997595B2 - Line backup method for modem network monitoring system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a modem network monitoring system used in a modem network monitoring system in which modems are connected by a dedicated line and a faulty line is bypassed by a switched line for backup. It relates to the line backup method of the system.

[0002]

2. Description of the Related Art FIGS. 6 to 9 show a conventional example.
6 shows a modem network and its monitoring system example 1, FIG. 7 shows a modem network and its monitoring system example 2, and FIG.
9 shows a modem network and its monitoring system example 3, and FIG. 9 shows an example of the backup processing in FIG.

In the figure, 1 is a host, 2 is a monitoring device, 3 is a modem, 4 is a data communication terminal device (DTE), 5 is a host data line (dedicated line), 6 is a public line network (switching network),
7 denotes a monitoring data line, and B denotes a backup function.

Conventionally, for example, a network shown in FIG. 6 has been known. In this network, a modem (MODEM: modulator demodula) is provided on the host 1 side and the data communication terminal device (hereinafter simply referred to as “DTE”) 4 side, respectively.
tor) 3 (# 1 to # 4) is provided, and between these modems,
This is a network connected by a host system data line (dedicated line) 5 (hereinafter, such a network is called a "modem network").

[0005] In the modem network, a monitoring device 2 is provided on the host side to monitor the network.
The system includes a system in which the monitoring device 2 and the modem 3 on the host side are connected by a monitoring system data line 7 (hereinafter, such a system is referred to as a "modem network monitoring system").

This example (modem network example 1)
In the embodiment, all the modems 3 on the host side and the DTE side have the backup function B. This backup function is provided when a failure occurs in the host data line (dedicated line) 5 and a public network (for example, ISDN: integrated service)
s digital network) 6 for backup.

The backup process when a failure occurs in the host data line 5 or the like will be described below. In the illustrated modem network, a line failure or the like is monitored by a modem network monitoring system, and when a failure occurs, a backup process is immediately performed.

For example, when an abnormality occurs in the host data line 5 between the modem # 1 (modem on the host 1 side) and the modem # 2 (modem on the DTE side), the public line network 6 is used. The backup from the modem # 1 to the modem # 2 is performed.

When a line failure occurs on the host data line 5 between the modem # 3 (modem on the host 1 side) and the modem # 4 (modem on the DTE side), the public line network 6 is used. Then, backup from the modem # 3 to the modem # 4 is performed.

As described above, from the modem # 1, the #
The modem # 2 is backed up, and the modem # 3 is always backed up to the modem # 4 (the backup destination is always fixed).

Therefore, there is no backup from the # 1 modem to the # 4 modem and from the # 3 modem to the # 2 modem (meaningless). Next, a modem network and its monitoring system example 2 will be described with reference to FIG.

In this modem network and its monitoring system example 2, in order to reduce costs, only the modem 3 on the DTE side has a backup function, and the host 1 has a spare modem 3A (# 5 modem) commonly used. ) Is an example of installation.

That is, the modems # 1 and # 3 on the host 1 side are not provided with a backup function, but a single spare modem 3A is installed and shared. The spare modem 3A has a backup function.

In such a network, the spare modem 3A is used for backup to the modem # 2,
4 modem. The telephone number to be downloaded from the monitoring device 2 to the spare modem 3A differs depending on which modem is used for backup.

By the way, in an actual modem network, it is rarely used only in the above-described modem networks (Examples 1 and 2), and is often used as a network in which these modem networks are mixed.

An example will be described below with reference to FIG.
In this example, the modems # 1, # 2, # 4, # 6, and # 7 have the backup function B, and the modems # 3 and # 5 do not have the backup function.

The modem # 7 is a spare modem 3A. The modem having the backup function is connected to the public network 6. In such a modem network, it is necessary for one monitoring device 2 to monitor a modem having a backup function and a modem without a backup function in common and to perform backup control.

Therefore, backup processing has been performed as follows. FIG. 9 is a backup processing example of the modem network and its monitoring system example 3 shown in FIG.
And the processing of the modem 3.

The symbols (1) to (4) in the figure show the procedure of the backup process. Now, it is assumed that a failure occurs between the modems # 1 and # 2, and the modem # 1 detects a line failure. At this time, backup processing is performed as follows. An alarm is notified from the modem # 1 to the monitoring device 2. The monitoring device 2 displays alarm information on a display to notify the operator. The operator recognizes the line failure between the modems # 1 and # 2, and issues a backup command from the modem # 1 to the modem # 2. The monitoring device 2 searches a database installed in the monitoring device 2 in advance to check the telephone number of the modem # 2. Then, the searched telephone number is downloaded to the modem # 1. In the modem # 1, the telephone number of the received modem # 2 is set in the backup function B, and then a response of the telephone number setting is returned to the monitoring device 2. After recognizing that the download of the telephone number has been completed, the monitoring device 2 transmits a call instruction to the modem # 1. After performing the call operation and performing backup, the # 1 modem transmits a call completion to the monitoring device 2. The monitoring device 2 recognizes the completion of the call and performs a call completion display to notify the operator. The operator recognizes the completion of the call by looking at the display.

When a failure occurs between the modems # 3 and # 4, the telephone number of the modem # 4 is downloaded from the monitoring device 2 to the backup modem 3A, and the backup modem 3A uses the telephone number. Then, a backup process to the modem # 4 is performed using the public line network 6.

Further, when a failure occurs between the modems # 5 and # 6, the telephone number of the modem # 6 is downloaded from the monitoring device 2 to the spare modem 3A, and Then, backup processing to the modem # 6 is performed using the public line network 6.

[0022]

The above-mentioned conventional apparatus has the following problems. That is, in a modem network monitoring system that monitors a modem network in which a modem having a backup function and a modem without a backup function coexist, in order to monitor and control all the modems in common, the telephone number of the call destination is
It was downloaded each time a call was made.

Therefore, it is possible to search for the telephone number of the call destination,
Downloading to the modem takes time,
Quick backup process could not be performed. SUMMARY OF THE INVENTION It is an object of the present invention to solve such a conventional problem and reduce the number of download processes from a modem network monitoring system to a modem so that a quick backup process can be performed.

[0024]

FIG. 1 is a diagram showing the principle of the present invention, in which the same reference numerals as those in FIGS. 6 to 8 denote the same elements.
Reference numeral 8 denotes a database, and 9 denotes a nonvolatile memory.

The present invention has the following configuration in order to solve the above problems. (1): Modem with line backup function (MOD
EM: Modulator / demodulator) 3 with line backup function
A plurality of modems 3 including modems that do not communicate with each other
Network, and monitor the dedicated line 5
When a failure occurs in the modem network monitoring system, the failed line is bypassed by using the switching line 6 to back up the line .
The database 8 has a line backup function.
Modem whose backup destination is fixed at the time of backup (#
Regarding 1), when performing line backup processing,
Register the telephone number of the station and fixed call destination information, and
It has a line backup function.
Modem to which the caller is fixed and backup of other lines
And managing them separately from modems without backup
Both of the modem 3, has a backup function of the line, and the modem (# 1) to the call destination at the time of backup are fixed, from the database 8, fixed onset of the modem (# 1) The call destination information is read, and the modem (#
The modem (# 1) is set in advance in the nonvolatile memory 9 in (1), and only the calling command is transmitted from the modem network monitoring system during the backup process of the modem (# 1). (2): In the line backup method of the above- mentioned (1) modem network monitoring system, when there is a modem having an automatic backup function of detecting a line failure and automatically backing up the line among the modems 3. Before
The modem network monitoring system recognizes the backup state of the modem having the automatic backup function by referring to information registered in the database 8 in advance.

[0026]

The operation of the present invention based on the above configuration will be described with reference to FIG. The database 8 contains, for each modem 3, the telephone number of its own station and fixed call destination information (fixed call destination model).
Information such as the modem ID (telephone number) of the dem is registered.

For example, the modem # 1 has a backup function (B in the figure) and has a fixed call destination modem.
The fixed call destination read from the database 8 is stored in the non-volatile memory 9 of the modem.
Information (ID (telephone number) of modem (# 2)) is set in advance.

In this way, for example, when a line failure occurs between the modems # 1 and # 2, only the transmission of a call command from the monitoring device 2 constituting the modem network monitoring system to the modem # 1 is performed. Should be performed.

Upon receiving the above-mentioned calling instruction, the modem # 1 makes a call using the information (telephone number of the # 2 modem) set in the non-volatile memory 9 to back up the line. .

Such backup processing is performed every time a failure occurs. However, since the telephone number of the modem # 2 is stored as it is, it is necessary to download the telephone number every time a call is made, as in the prior art. Is gone.

Therefore, the processing time can be shortened and the backup processing can be speeded up because the download processing becomes unnecessary. If there is a modem having an automatic backup function, the modem detects a line failure and automatically performs backup.

However, even in this case, the modem network monitoring system can recognize which modem has performed the automatic backup process by referring to the information in the database 8.

[0033]

Embodiments of the present invention will be described below with reference to the drawings. (Explanation of First Embodiment) FIGS. 2 to 4 are diagrams showing a first embodiment of the present invention, FIG. 2 is a diagram showing a modem network and its monitoring system, and FIG. 3 is table data of a database. For example, FIG. 4 is a processing flowchart of the monitoring apparatus.

In the figure, the same reference numerals as those in FIGS. 1, 6 to 8 denote the same parts. FIG. 2 shows a modem network according to the present embodiment. The basic configuration of the modem network and the modem network monitoring system is the same as in FIG.

That is, # 1, # 2, # 4, # 6, # 7
Modem has a backup function, # 3,
The # 5 modem has no backup function. And #
7 is used as a spare modem 3A.
The backup process is performed using the public network 6.

In such a modem network,
The modem # 1 is provided with a non-volatile memory 9 for setting the telephone number of the fixed call destination (the modem # 2). Further, the monitoring device 2 constituting the modem network monitoring system is provided with a database 8, and the database 8 is used to perform a backup process.

In the database 8, for example, table data as shown in FIG. 3 is registered. In this table data example, the modem ID indicates the modem number shown in FIG. 2, and the subscriber line number indicates the telephone number of the public line connected to the modem ID.

For example, the modem of # 1 has its own telephone number of "03-5123-4567" and the fixed call destination is # 2. Also, since the modem # 3 has no backup function, the telephone number and the fixed call destination modem ID
Has become none.

In the modem network having such a configuration, when the modem is installed, the monitoring device 2 reads data from the database 8 and downloads the telephone number of the fixed call destination to the # 1 modem having the backup function.

That is, in this example, the modem of # 1 is:
Since the modem # 2 is the fixed call destination, the telephone number of the modem # 2 is read from the database 8 and
To the non-volatile memory 9 in the # 1 modem.
The telephone number is set (set only once) in advance.

In this way, with regard to the modem # 1, it is not necessary to download the telephone number at the time of the backup processing, and only the transmission of the call command is required. During normal operation, for example, if a failure occurs between the modems # 1 and # 2, the operator of the monitoring device 2 recognizes the failure in the same manner as in the related art, and performs a backup process from the modem # 1 to the modem # 2. To do.

In the backup process, the monitoring device 2
Searches database 8 for modem # 1. As a result, it is recognized that the fixed call destination modem ID is specified as the ID of the modem # 2.

The operator's instruction is from the # 1 modem to the #
Since the data is backed up to the modem 2, the data matches the data on the database 8, and it can be seen that the telephone number need not be downloaded to the modem # 1 (since it was downloaded when the modem was installed).

Therefore, in this case, a call command is immediately transmitted to the modem # 1. # Which received this call command
In the first modem, a nonvolatile memory 9 set in advance is used.
It reads out the telephone number in the box, makes a call, and performs backup processing.

When a failure occurs between the modems # 3 and # 4, the operator of the modem # 7 does not have a backup function, and the operator of the modem # 7, that is, the spare modems 3A through # 4, Instruct the modem to back up. This processing is the same as that of the conventional example, and the description is omitted.

At this time, the monitoring apparatus 2 searches the database 8 for information on the modem of # 7, and recognizes that the fixed call destination modem ID is not specified. Then, # 4
Of the modem 8 from the database 8 and download the subscriber telephone number (03-5345-6789) to the # 7 modem (backup modem) 3A.

When receiving the message indicating the completion of the telephone number setting from the modem # 7, the monitoring device 2 transmits a call command to the modem # 7. The # 7 modem that has received the call instruction issues a call to perform backup processing.

Hereinafter, the processing of the monitoring apparatus 2 will be described in detail with reference to the processing flowchart of FIG. Each processing number in the figure is shown in parentheses. First, as described above, when the monitoring device 2 receives a calling instruction from an operator specifying a calling side and a called side modem (S1), the monitoring device 2 searches the database 8 for information on the calling side (S1). S2).

Next, it is determined whether the fixed call destination modem ID of the calling side is the same as that of the called side (S3). As a result, if they are the same, a calling instruction is transmitted to the calling side (S6). But,
When the fixed call destination modem ID of the calling side is different from that of the called side (S3), information on the called side is retrieved from the database 8 (S4).

Then, the subscriber's line number (telephone number) of the called side is downloaded to the calling side (S5), and then a calling command is transmitted to the calling side (S6). (Explanation of the Second Embodiment) FIG. 5 is a configuration diagram of a modem with an automatic backup function in the second embodiment.

In the figure, 3 is a modem, 10 is a line status monitor, and 11 is an automatic backup unit. This embodiment is an example in which, of the modems shown in the first embodiment, the modem # 1 having a backup function (see FIG. 2) is replaced by the modem with an automatic backup function shown in FIG.

FIG. 5 shows a modem with an automatic backup function.
As shown in (1), a line status monitor 10 and an automatic backup unit 11 are provided. Then, when the state of the dedicated line connected to the own modem falls below a certain level, the function automatically shifts to a calling operation (this function is called an automatic backup function). This will be described in detail below.

From the monitoring device 2 or the setting panel of the modem, a line quality limit value (threshold value) which triggers the start of automatic backup is designated. For example, suppose that automatic backup is to be performed when the S / N ratio of a line falls below a certain value.

In this case, the limit value is input to the modem 3 from the monitor 2 or the setting panel of the modem 3. When input from the monitoring device 2, the data is downloaded to the modem 3.

The modem 3 has a line status monitor 10 for constantly monitoring the line quality. When the designated item (in this case, S / N) falls below the limit value, the modem 3 issues an alarm to the automatic backup unit 11. Issue a call command.

Thus, the line can be automatically backed up from the monitoring device 2 without the operator instructing the call. When this function is used, the work of the operator is reduced. However, when it is desired to manage the combination of the modems that are being backed up in the monitoring device 2, an inconvenience occurs.

The automatic backup function makes a call based on a telephone number preset in the modem, so that the call destination is fixed. Therefore, a fixed call is registered in the database 8 of the monitoring device 2 for the modem that performs automatic backup (the modem # 1 in FIG. 2 in this example).

In the registration of a fixed call, as shown in FIG. 3, the fixed call destination modem ID is registered. Therefore, even if the backup completion is suddenly transmitted from the modem, the monitoring device 2 reads the fixed call from the database 8. It is possible to read out the call destination and recognize that the fixed call destination is backed up as the called side. For this reason, the above-mentioned inconvenience is solved.

If a modem having the above automatic backup function is used, the backup processing can be further speeded up.

[0060]

As described above, the present invention has the following effects. (1) For a modem having a backup function, it is not necessary to download a telephone number every time a line is backed up. Therefore, the backup process can be speeded up accordingly. (2) If a modem having an automatic backup function is used, the speed of the backup process can be further increased, and the status of the backup process can be sufficiently recognized in the modem network monitoring system based on information in the database.

Therefore, backup of multiple modems is
It can be managed accurately. (3) The line backup process using a modem having a backup function and the line backup process using a spare modem can be operated in a single modem network monitoring system.

[Brief description of the drawings]

FIG. 1 is a principle diagram of the present invention.

FIG. 2 is a diagram showing a modem network and a monitoring system therefor in a first embodiment of the present invention.

FIG. 3 is an example of table data of a database.

FIG. 4 is a processing flowchart of the monitoring device in the first embodiment.

FIG. 5 is a configuration diagram of a modem with an automatic backup function in a second embodiment.

FIG. 6 is an example 1 of a conventional modem network and its monitoring system.

FIG. 7 is a second example of a conventional modem network and its monitoring system.

FIG. 8 is a third example of a conventional modem network and its monitoring system.

FIG. 9 is an example of a backup process in FIG. 8;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 host 2 monitoring device 3 modem (MODEM) 4 data communication terminal device (DTE) 5 host system data line (dedicated line) 6 public line network 3A spare modem 8 database 9 non-volatile memory

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04M 11/00-11/10

Claims (2)

(57) [Claims] 1. A modem having a line backup function.
And modems that do not have a line backup function
Number of modems are mixed, which is connected by a dedicated line (5) model
Multiple modem networks that communicate between
When the failure occurs in the leased line (5), the failure occurs.
In a line backup method for a modem network monitoring system for backing up a line by bypassing the line using a switched line (6) , a database in the modem network monitoring system is provided.
(8) has a line backup function, and
For modems with fixed destinations,
Your own phone number and fixed destination information when performing the up process
And have a backup function for the line, and
When the call destination is fixed and the other line
Manage separately from modems without backup function
Rutotomoni, among the modem (3) has a backup function of the line, and the modem (# 1) to the call destination at the time of backup are fixed, from the database (8), said modem (# The fixed call destination information of 1) is read out, and the non-
A line backup method for a modem network monitoring system, wherein the method is set in advance in a call originating memory, and only a call command is transmitted from the modem network monitoring system during a backup process of the modem (# 1). . 2. Among the modem (3), if it detects a failure of the line, a modem having an automatic automatic backup function for backing up the line existed, the modem network monitoring system, said database ( The line backup method of a modem network monitoring system according to claim 1, wherein the backup state of the modem having the automatic backup function is recognized by referring to the information registered in (8) in advance.