JPH0260110B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a system control method for a remote switchboard system, and particularly to a system periodic switching system for a remote switchboard system.

Conventionally, the configuration of a remote switchboard system has been such that when transmitting and receiving information for switching connection operations between the remote switchboard and the central control unit of the master station, the master station has a central control unit and a master station information transfer device, and the remote station has a central control unit and a master station information transfer device. It simply had dual switchboard control and remote station information transfer equipment. Therefore, in order to ensure system reliability, when periodic system switching is performed by a command from a system maintainer, after stopping key reading of the switchboard, unsent information from the information transfer devices of the master station and remote station is sent to the other station. When the operation to send out all the signals, the so-called sweep operation, was completed, the system was switched to another system.

However, in a remote system, the master station and the remote station are connected by a data link, and information is transferred using transparent mode transmission control procedures. Because the speed is extremely fast compared to the information transmission speed of the data link, there is a possibility that a large amount of unsent information will accumulate in the master station information transfer device, and the cleaning process during periodic switching will take a long time. In the main station central control unit, there is a waiting time in the exchange process in the switchboard system, and in the remote station switchboard, the key input by the operator is not processed, which hinders the exchange process.

The present invention provides a device with a memory copy function between the active system and the standby system of each duplexed information transfer device in both the master station and the remote station, and directly transfers unsent information from the active system as a clean-up process during system periodic switching. It transfers data to the backup system and completes the flushing in an extremely fast time compared to the processing time required to sweep data to the other station via the conventional data link.Furthermore, the synchronization of the backup data link is usually maintained, and the data is transferred to the master station and the remote station. The purpose of the present invention is to provide a system configuration that can solve the long-term suspension of switching operations during conventional periodic switching by being able to intervene in switching operations immediately after the transfer of unsent information from the active system to the standby system is completed. .

In order to achieve the above object, the present invention provides a central control unit and a master station information transfer device in a master station, and a switch control unit and a remote station information transfer device in a remote station. In a configuration in which information on exchange connection operations at a remote switchboard is transmitted and received between the main station and the main station central control device, the duplexed information transfer devices of the main station and the remote station are independently connected to each other by a data link, and , a memory copy device is provided between the duplexed information transfer devices of both the master station and the remote station, which can directly copy unsent information for the partner station contained in the memory of the active information transfer device to the backup information transfer device; The data link operation mode is
A transparent system is used, and the standby data link is characterized by a structure in which synchronization is maintained by a signal unit that is not related to the message sequence number in the transparent mode.

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

FIG. 1 is a block diagram showing an embodiment of the remote switchboard system control method of the present invention.

In the figure, the remote switching system of the present invention includes redundant central control units CC0, CC1, data channel devices DCH0, DCH1, master station information transfer devices SLC0, SLC1, and remote station information transfer devices.
RSLC0, RSLC1 and data links L0, L1
, a master station memory copy device MC, a remote station memory copy device RMC, a transmission terminal device T, and a remote switch RPOS.

The master station information transfer devices SLC0 and SLC1 convert the switchboard exchange connection information received from the central control devices CC0 and CC1 into a transparent mode determined by the system, and the remote station information transfer devices RSLC0 and
Send to RSLC1. It also sends information sent from remote stations to central controllers CC0 and CC1.
The master station information transfer devices SLC0 and SLC1 have a function of transmitting information from the master station to the remote switching center RPOS and transmitting information from the remote switching center RPOS to the master station.

Next, the operation of the present invention configured as described above will be explained with reference to FIGS. 2 to 4.

FIG. 2 shows the normal operating mode of the remote switching system of the present invention. In this figure, the 0 system is the current system. In the figure, solid lines indicate connections for switching operations, and dotted lines indicate backup systems. Furthermore, a dashed line indicates a state in which the data link with the partner station is synchronized, although it is not involved in the exchange process.

FIG. 3 shows the state when a system switching instruction is issued. In the figure, the 0 system is the active system and is in a state where it is switched to the 1 system. In other words, both the master station and the remote station send unsent information to the other station and the central control unit CC0,
The unsent information to the remote switch RPOS is copied to the standby system (1 system) information transfer devices SLC1 and RSLC1 via the memory copy devices MC and RMC. In this state, the exchange processing of the central controller CC0 and the remote switch RPOS waits until the copy is completed (double-dashed line in the figure). In addition, data links L0 and L1 are
As shown by the dashed line, synchronization is achieved.

FIG. 4 shows the operating mode in which the periodic switching has ended and the replacement process has been restarted. From the active information transfer device SLC0, RSLC0 to the backup information transfer device SLC1, RSLC1, the other station, the central control device,
Once the copying of unsent information to the remote switchboard is completed,
Since the backup data link L1 maintains synchronization, it immediately starts sending the copied information to the other station, the central controller CC0, and the remote switch RPOS.

As explained above, the present invention installs a memory copy device, which did not exist in the past, between the active system and standby system of the duplexed information transfer equipment of each of the master station and remote station. By directly copying the unsent information from the other station in the system information transfer processing device to the standby system, and by maintaining the synchronization of the standby system data link with a signal unit that is not related to the sequence number in transparent mode, the remote switch system can be improved. This has the effect of allowing system periodic switching to be performed immediately and for smooth replacement processing after switching.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the remote switching system control method of the present invention, and FIGS. 2 to 4 are block diagrams showing the operation of the above embodiment. CCi... Central control unit, DCHi... Data channel device, SLCi... Master station information transfer device, RSLCi... Remote station information transfer device, Li... Data link, MC... Master station memory copy device, RMC... Remote station memory copy device, T …Transmission terminal station, RPOS…Remote switchboard.

Claims (1)

[Scope of Claims] 1 The master station is provided with a central control unit and a master station information transfer device, while the remote station is provided with a switching board control device and a remote station information transfer device, respectively, so that the remote switching board and the main station In a configuration that transmits and receives information on exchange connection operations at a remote switchboard to and from a central control unit, the information transfer devices of the duplexed master station and remote stations are connected to each system independently by a data link, and the master station , between the redundant information transfer equipment and the remote station,
A memory copy device is provided that can directly copy the unsent information to the partner station contained in the memory of the active information transfer device to the backup information transfer device, and the operation mode of the data link is transparent, and the backup data link is A remote switching system control method is characterized in that synchronization is maintained by a signal unit that is not involved in message sequence numbers in transparent mode.