JP2609811B2 - Device backup method for small packet multiplexer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus backup system for a small packet multiplexing apparatus, and more particularly, to a small packet multiplexing apparatus accommodating an important subscriber line in a financial business or the like, in which a terminal stops for a long time due to a failure. The present invention relates to an apparatus backup system for a small-sized packet multiplexing apparatus which can avoid the problem.

[0002]

2. Description of the Related Art Conventionally, when a failure occurs in a packet multiplexing device, a maintenance and deployment product prepared in advance is used.
Replace the faulty part and restore the equipment / subscriber line.
In this case, if a failure occurs near the maintenance base, it can be dealt with promptly, but in the case of a distant place, the terminal accommodated in the equipment stops until the maintenance staff arrives there, resulting in damage. Will be quite large. Further, when such a case is assumed and the maintenance staff is arranged, there is a disadvantage that a large number of maintenance staffs are forced to be arranged because the location of the apparatus differs depending on the customer.

[0003]

Although the size of the network and the arrangement of the apparatuses differ depending on the customer, the arrangement of the maintenance base remains the same, and the customer damage caused by the equipment failure of the customer accommodating the important subscriber line can be minimized. As described above, by physically replacing the subscriber line with another device and logically securing the communication path, it is possible to quickly recover the important subscriber line regardless of the distance from the maintenance base. It is an object of the present invention to provide a highly reliable network.

[0004]

A backup system according to the present invention comprises a plurality of packet switches connected by a first communication line of a dedicated line, and a plurality of packet switches respectively connected to the packet switch by the first communication line. A small packet multiplexing apparatus, and switching means for accommodating and switching a subordinate subscriber line accommodated in a current one of the small packet multiplexing apparatuses to a backup one through a second public communication line. The packet switch accommodating the small packet multiplexer for backing up the subscriber information of the packet switch accommodating the apparatus when the current small packet multiplexer is unrecoverable due to a failure. Turn
Transmitting a station and subscriber information to the backup small packet multiplexer to logically form a communication path, and switching the subordinate subscriber line to the backup small packet multiplexer. It is characterized by including.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention.

In FIG. 1, dedicated lines S1 to S1 are connected to the main station.
S3 and packet switches A1 and A2 for performing switching connection using ISDN lines I1 and I2, a network management device N1 for controlling the packet switches A1 and A2, and a control console M1 for controlling line switching. . The slave station is provided with a small packet multiplexer a1 and a small packet multiplexer a2 for backup thereof.

In this embodiment, when the working small packet multiplexer a1 is temporarily unable to recover due to a failure,
The accommodating subscriber line is physically accommodated in the backup small packet multiplexer a2 to logically secure a communication path and continue the exchange operation. Packet switch A
1 and the packet switch A2 are on a dedicated line S1, between the packet switch A1 and the small packet multiplexer a1 is a dedicated line S2, and between the packet switch A2 and the backup small packet multiplexer a2. It is connected by a dedicated line S3, and is also used as a bypass for failure of the dedicated line S2.
ISDN lines i1 and i2 are connected to the DN network C1. A line switching device B1 is connected to the subscriber line under the small packet multiplexing device a1, and an ISDN line I1 is connected to the ISDN network C1. A line switching device B2 is connected to the small packet multiplexing device a2. , So ISD
The N line I2 is connected to the ISDN network C1.

If the dedicated line S2 becomes a communication failure while the packet network configured as described above is providing service, a network failure alarm is notified to the network management device N1, and the ISDN line i1 is triggered by this alarm. , I2, it is possible to secure a communication path for the small packet multiplexer a1. However, if the small packet multiplexing device a1 becomes an irrecoverable failure, it cannot be dealt with by securing the communication path by the ISDN lines i1 and i2. In such a case, the communication of the terminal T accommodated in the faulty device is stopped, so that the customer of the slave station notifies the maintenance person (operator) of the master station of the report of the communication abnormality. To switch to the backup small packet multiplexer a2.

[0010] The network management device N1 stores in advance the station of the small packet multiplexing device a1 and the subscriber accommodating information d1. Information D1, D2 is stored in the packet switches A1, A2.
Storage devices H1, H2, h for accommodating 2, d1, d2
1, h2 (hard disk, memory card, etc.) are mounted. At the time of backup switching, first, data D1 held by the packet switch A1 accommodating the small packet multiplexer a1 is transferred to the upper station H2 accommodating the small packet multiplexer a2 (the transferred data D1).
2). The small packet multiplexing device a2 is a device having no station and subscriber information.
The station and the subscriber accommodation information d1 of the small packet multiplexing device a1 possessed by 1 are dropped. Thereafter, the small packet multiplexer a2 is restarted, the station and the subscriber information d1 can be referred to, a logical communication path is formed, and a line is switched via the ISDN network C1 by a line switching control console M1. The switching devices B1 and B2 are connected. With the above procedure, it is possible to rescue the subscriber line under the control of the small packet multiplexer a1.

[0011]

As described above, according to the present invention, when an important subscriber line is accommodated in a small packet multiplexing apparatus, customer damage due to customer equipment failure can be minimized. This provides an effect that a more reliable network operation can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

[Description of References] A1, A2 Packet Switch a1, a2 Small Packet Multiplexer B1, B2 Line Switch C1 ISDN (Line Switch) Network I1, I2 ISDN (Line Switch) Line M1 Control Console N1 Network Management Unit S1, S2 , S3 dedicated line

Claims (1)

(57) [Claims] 1. A plurality of packet switches connected by a first communication line of a dedicated line, a plurality of small packet multiplexers respectively connected to the packet switches by a first communication line, and the small packet multiplexer Switching means for switching the subscribed subscriber line accommodated in the current one of the multiplexing apparatuses to the backup one via the second communication line of the public line . When the multiplexing device becomes unrecoverable due to a failure, the subscriber information of the packet switch accommodating the device is transferred to the packet switch accommodating the backup small packet multiplexer, and the backup small packet is transferred. The station and the subscriber information are dropped into the multiplexing device to logically form a communication path, and the subordinate packet is added to the backup small packet multiplexing device. Device backup method for small packet multiplexing apparatus characterized by comprising the steps of switching the user line.