JPH0326586B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention provides a switching system in which a central controller controls a plurality of switching consoles via a switching console controller, in which the central controller can distinguish between a fault in a switching console and a power-off. This invention relates to a switchboard power-off advance notice system that enables users to perform the following tasks.

Prior Art and Problems FIG. 1 shows a schematic configuration of a switching system in which a central controller controls a plurality of switchboards via a switchboard control device. Audio signals from multiple switchboards SWBD are sent to the network NW via the switchboard controller PSC, and audio signals from the network NW are distributed to each switchboard SWBD. In addition, the switchboard controller PSC performs operations for distributing switchboard control information from the central controller CC for multiple switchboards SWBD to each switchboard SWBD, and also transmits information from each switchboard SWBD to the central controller CC. perform a function.

In this case, the switchboard controller PSC controls each switchboard
As a means of receiving information from SWBD, a response request signal is sent to each switch SWBD independently.
Even if each switchboard SWBD does not need to send information to the central controller CC, it has a method of making some kind of response to the switchboard controller PSC.

FIG. 2 shows a conventional switchboard failure detection method in such a switching system. That is,
The switchboard controller PSC periodically sends a response request signal KRQ to each switchboard i. switchboard
In response to this, if SWDi has information to return, it sends it out, and if there is no information, it returns a ``no information'' signal. If the switchboard SWBDi has a failure or is powered off, it will not respond to the response request signal KRQ, but if there is no response, the switchboard controller PSC will assume that a failure has occurred and send a message to that effect to the central controller CC. The central control unit CC then performs processing to notify the maintenance personnel of the occurrence of the failure.

In this manner, the switchboard control device treats all cases where the switchboard does not respond as a failure. However, there are cases where the switchboard is not at fault and a maintenance person turns off the power to the switchboard for some reason, but even in such cases, the switchboard does not respond to the response request signal, so the central There was a problem in that the control device handled the problem as a failure.

Purpose of the Invention The present invention aims to solve the problems of the prior art, and its purpose is to provide a system in which a central controller detects failures in a plurality of switchboards via a switchboard controller. In a system, when a switchboard does not respond to a response request signal from a switchboard controller, it is possible for the central controller to identify whether the switchboard is at fault or is in a power-off state. The goal is to provide a method that can be used.

Embodiment of the Invention FIG. 3 is a diagram illustrating the switching board power cut-off notice system of the present invention. In the method of the present invention, each switch
A key is provided in SWBD to notify the switchboard controller PSC and central controller CC of power off at the switchboard. This notice is similar to the normal key information in the switchboard SWBD, and also in the switchboard controller PSC.
In response to the response request signal KRQ from
It is received by the switchboard controller PSC and notified to the central controller CC. The central control unit CC registers the fact that this power-off notice has been given, and the next time the corresponding switchboard SWBD does not respond to the response request signal KRQ, it treats that switchboard as being powered off. , not treated as a disability. on the other hand,
The switchboard is turned off without a power-off warning.
When the SWBD does not respond, the switchboard controller PSC treats the switchboard as a fault and sends it to the central controller.
The CC is notified, and the central controller CC then takes steps to deal with the failure.

4 and 5 show an embodiment of the switchboard power cut-off notification system of the present invention, and FIG. 4 is a system configuration diagram regarding the switchboard control device, in which the same parts as in FIG. 1 are shown. are shown with the same symbol, DT is a digital terminal, CSE is a common line signal device, CSEI is a CSE interface circuit,
CHC is a channel controller, PST is a position trunk, and SUB is a subscriber. Also the fifth
The figure explains information transmission when a power-off notice is given in the system of FIG. 4.

In Fig. 4, solid lines indicate the flow of audio signals, and after the audio signals from the position trunk PST are exchanged in the network NW, they are transferred to the digital terminal DT and the switchboard controller.
The data is sent to each switch SWBD via PSC, and sent to each switch
The audio signals from SWBD are sent to the position trunk PST by reverse order. Furthermore, the dotted line indicates the flow of control signals, and control information from the switching board SWBD is sent from the network NW to the central controller CC via the CSE interface circuit CSEI, the common line signaling device CSE, and the channel controller CHC.

In FIGS. 4 and 5, the switchboard control device
PSC for all controllable switchboards SWBD.
A response request signal KRQ is sent individually and periodically, and a response request signal is sent to a certain switchboard SWBD.
When a KRQ is sent, each switch waits for a response from the switch SWBD, and when a response is received, performs processing appropriate to the response, and also sends a response request signal KRQ to the next switch SWBD.
Perform sequentially for SWBD. In this case, processing is performed inside the switchboard controller PSC to edit the response signal from each switchboard SWBD and send it to the central controller CC, but this is not necessary because there is no information received from the switchboard SWBD. If there is no transmission, no transmission is performed.

Each switch SWBD is equipped with various operation keys, a display consisting of a plasma display, and a display lamp, and when giving a notice of power off, turn on both the control key CTRL and stop key N at the same time. When the central controller CC receives the power cutoff notice signal CTRL+N via the switchboard controller PSC, it registers it and sends a signal notifying the reception to the switchboard SWBD. switchboard
SWBD analyzes this signal and displays "POF OK" on the display indicating that it is okay to turn off the power. In this state, if the switchboard SWBD turns on the disconnect notice signal CRTL+N again, the central controller
When the CC receives this, it cancels the power-off notice registration and sends a signal notifying the reception to the switchboard SWBD. The switch SWBD analyzes this signal and displays "POF CCL" on the display indicating that the power off notice has been cancelled. Switchboard SWBD further sends disconnection warning signal CRTL
When the +N key is turned on, the power off warning is issued again, and "POF OK" appears on the display.
is displayed.

The switchboard controller PSC is a switchboard controller that
When the SWBD becomes unresponsive, the central controller
Notify the CC of the failure of the switch SWBD.
In the central control unit CC, if advance notice of power off has been registered for the switchboard SWBD to which the notification of a failure has been made, processing is performed on the assumption that the power has been turned off in that switchboard SWBD.

The switch controller PSC continues to periodically send the response request signal KRQ to the switch SWBD even after the switch SWBD becomes unresponsive. switchboard
When some response is received from SWBD, the switchboard controller PSC notifies the central controller CC of this as fault recovery. If the central control unit CC receives a notice of power off for the switchboard SWBD, it treats this as a result of power on.
If no notice of power off has been received, it will be treated as failure recovery.

Effects of the Invention As explained above, according to the switchboard power-off notification system of the present invention, when the switchboard sends out a power-off warning signal, this is registered in the central control unit, and a response from the switchboard control unit is sent. When a switchboard does not respond to a request signal, the central control unit determines whether the switchboard is in a power-off state or is at fault, depending on whether a power-off notice is registered or not. The central controller will notify you when the switchboard is unresponsive, if it is due to a power outage.
It is possible to prevent processing as a failure.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing a schematic configuration of a switching system in which a central controller controls multiple switchboards via a switchboard control device, and Fig. 2 is a diagram showing a conventional switchboard failure in the switching system shown in Fig. 1. FIG. 3 is a diagram illustrating the detection method, FIG. 3 is a diagram explaining the switchboard power cut-off notice system of the present invention, FIGS. 4 and 5 show an embodiment of the switchboard power-off notice system of the present invention, and FIG. 5 is a system configuration diagram related to switchboard control, and FIG. 5 is a diagram showing information transmission when giving advance notice of power off in the system of FIG. 4. SWBD...Switchboard, PSC...Switchboard control device,
NW...Network, CC...Central control unit,
DT...Digital terminal, CSE...Common line signal device, CSEI...CSE interface circuit,
CHC...Channel controller, PST...Position trunk, SUB...Subscriber.

Claims (1)

[Claims] 1. A plurality of switchboards SWBD and a central controller CC exchange information via a switchboard controller PSC,
A system in which when the switchboard does not respond to the response request signal KRQ periodically sent from the switchboard controller PSC, the switchboard controller PSC notifies the central controller CC of a failure in the switchboard SWBD. In this case, when the switchboard SWBD sends a signal forewarning power cut, this is registered in the central control unit CC, and the switchboard SWBD does not respond to the response request signal KRQ sent periodically from the switchboard control unit PSC. A switchboard power-off notice system, characterized in that when the switchboard SWBD is powered off and a failure occurs, the central control unit CC distinguishes between power-off and failure of the switchboard SWBD depending on whether or not the power-off notice registration is registered.