JPH09247243A - Transmission line management method - Google Patents

Abstract

(57) [Abstract] [Problem] When only one side of a duplicated transmission line fails,
Be able to operate in the other system. In the normal state, one of the transmission lines is ACT.
The other system is operated as the H-SBY system (state 1). At this time, if a failure occurs in the ACT system, H-S
The BY is the ACT system, and the failed ACT system is the SBY system (state 2). After this, a command is generated, the failed system is disconnected, and the transmission line is unified (state 3).
After that, when both systems fail, the ACT system is left as it is and the system switching is not performed (state 4).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission line management method, and more particularly to a method for managing and operating a duplicated transmission line and a common management method for a method for managing a single transmission line and a method for managing a duplicated transmission line.

[0002]

2. Description of the Related Art Conventionally, a transmission line of an electronic exchange is managed as to whether or not the transmission line is mounted (present) / not mounted (not present) / under expansion / reduction work, and the transmission line is not blocked /
Management was performed in the state of being available or not available, such as being blocked.

[0003]

In the above-mentioned conventional transmission line management method, is there a transmission line of an electronic exchange installed (present) / not mounted (not present) / under expansion / reduction work? Management, and the transmission line is not blocked / blocked, and whether it is usable or not, so when only one side of the duplicated transmission line fails,
There was a drawback in that the redundant thermal reserve system that operates only on the other system could not be taken, and the advantages of the redundant system could not be utilized.

An object of the present invention is to provide a method of managing a transmission line that can be operated only by the other system when one system of the duplicated transmission line fails.

Another object of the present invention is to provide a transmission line management method which does not need to be changed even when the transmission line is operated in a single structure.

[0006]

According to the transmission line management method of the present invention, a transmission line is used as a duplicated heat protection device and one system is an AC system.
The T system and the other system are managed as the H-SBY system, and when a failure occurs in the ACT system transmission line, the H-SBY system transmission line is set as the ACT system, and the failed ACT system transmission line is set as the SBY system.

Another transmission line management method of the present invention has identification information of single / duplex, and when the identification information is changed from duplex to single, one system is in an ACT system and the other system is in a standby state. When the identification information changes from single to dual, one system is set to the ACT system and the other system is set to the SBY system.

[0008]

The first aspect of the present invention enables management of a single transmission line that has been conventionally managed in the states of mounting / not mounting / under construction, etc. by duplication. During operation (ACT) / Preparing for heat and cold (SB)
Y) / Management is performed in the state of being in trouble (OUS).

At this time, since one system is not mounted in the single transmission line, it is not possible to transit to the state of ACT / H-SBY. Therefore, in claim 2, by always managing the single transmission line in the ACT / OUS state, the transmission line is treated as a device regardless of the difference between the single transmission and the dual transmission.
It is managed in the BY / OUS state and can be controlled by the same method of software. In other words, the software does not need to be aware of single or dual, and the control of the single transmission line may be the same as that of the doubled transmission line, as long as it has the consciousness that only one system is out of order in the single transmission line. Become.

Further, the switching between single and dual can be realized by a simple operation of switching only one system portion of the software state to a failure or a normal state.

It should be noted that the present invention is a system for facilitating the management of single or dual transmission lines by software. In the system capable of early thermal reserve by the hardware function as in Japanese Patent Laid-Open No. 58-225761. Absent. In addition, JP-A-4
It is not a system for deciding which system of the duplicated transmission line is selected like No. 054035.

[0012]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, which is a management state diagram of software for managing a duplicated transmission line, and FIG.
(2), (3), and (4) are states 1, 2, 3, and 4, respectively.
3 is a hardware diagram showing the state of the transmission path corresponding to
(1), (2), (3), and (4) are flowcharts of software processing for changing the state of the transmission path. In addition,
State 3 and state 4 surrounded by the dotted line in FIG. 1 are transitionable states of the single transmission line.

In the normal state, the transmission line 7 between the exchange 5 and the opposite device 6 is in the state 1, that is, as shown in FIG. 2A, one transmission line is the ACT (active) system and the other transmission line is H-. SBY
It is operated as a (heat reserve) system. Further, the identification information for single / duplexing at this time is “duplication”. At this time, when a failure occurs in the ACT system (step 11), the software notified of the failure analyzes the failure state (step 12), performs state transition processing, and sets the H-SBY system to A
The CT system is used, and the failed ACT system is SBY (cold backup).
The system is set (step 13), and the state number is set to "2" (step 14). FIG. 2 (2) shows the state of the transmission line at this time.

After this, a command (instruction of transmission line maintenance sound)
Occurs (step 21), the failure state is analyzed (step 22), and when the identification information for single / redundant changes from dual to single, state transition processing is performed to bring the system in which the command has occurred to the OUS state ( (Fault system isolation) (step 23) and status number "3" (step 2)
4). FIG. 2C shows the state of the transmission line at this time, and the transmission line is single.

After that, when a failure occurs in the ACT system (step 31), the failure state is analyzed (step 32), and the ACT remains as it is because both systems have a failure, that is, the system is not switched (step 33). , Only the state number is changed to "4" (step 34). FIG. 2 (4) shows the state of the transmission line at this time. That is, in the case of the single transmission line, the normal state is operated in the state 3, and when the ACT system fails, the state transits to the state 4.

When the transmission line failure is recovered (step 4)
1), the recovery state is analyzed (step 42), the system in which recovery has occurred is set as the ACT system (step 43), and the state number is set to "3" (step 44).

As described above, according to the present embodiment, the software for managing the state of the transmission lines only needs to narrow the range of state transitions by judging whether the transmission line is in the single state or the double state. It becomes manageable.

Software for managing the state of the transmission path is installed in the central processing unit of the exchange 5.

[0020]

As described above, the present invention has the following effects.

(1) According to the invention of claim 1, the transmission line is managed by the same management as the duplexer of the transmission line, which has been conventionally managed in the presence / absence of mounting / not mounting / under construction. The system can be easily switched when a failure occurs.

(2) According to the invention of claim 2, a management operation method similar to the duplication can be adopted by the identification information even in the case of the unification.
Eliminates the need for complicated management operations.

[Brief description of drawings]

FIG. 1 is a diagram showing a management state by software of a subscriber transmission line.

FIG. 2 is a hardware diagram showing each state of a transmission path.

FIG. 3 is a flowchart of software processing in states 1 to 4.

[Explanation of symbols]

1, 2, 3, 4 State 5 Switch 6 Opposite device 7 Transmission path 11-14, 21-24, 31-34, 41-44
Steps

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Yoshio Sato 3-19-2 Nishishinjuku, Shinjuku-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Akira Tokutake 3-19-3 Nishishinjuku, Shinjuku-ku, Tokyo No. 2 inside Nippon Telegraph and Telephone Corporation (72) Inventor Yoshitaka Ishihama 3-19-3 Nishishinjuku, Shinjuku-ku, Tokyo Inside Nippon Telegraph and Telephone Corporation

Claims (3)

[Claims] 1. A transmission line is used as a redundant thermal standby device, one system is managed as an ACT system, and the other system is managed as an H-SBY system.
When the ACT system transmission line fails, the H-SBY system transmission line is
A transmission line management method in which a CT system is used and a failed ACT system transmission line is used as an SBY system. 2. When the identification information of single / duplex is provided and the identification information is changed from duplex to single, one system is set as an ACT system and the other system is in a standby state, and the identification information is 2. The transmission line management method according to claim 1, wherein one system is an ACT system and the other system is an SBY system when the system is changed to a duplex system. 3. The transmission line management method according to claim 1, wherein the transmission line is a subscriber transmission line between a switch and a remote terminal which is an opposite device.