JPS60144059A - Call load control system - Google Patents

Abstract

PURPOSE:To prevent overload state of a central processing unit from being called for by adopting the constitution that a call detection report from a subscriber circuit is not transmitted to the central processing unit when the load state of the central processing unit reaches a prescribed value or over. CONSTITUTION:Subscriber circuits 110, 111 supervise the loop state of extensions 101, 102 respectively and when a call from an extension is detected, the call detection report is transmitted to the central processing unit 120, which processes the call such as the connection of a subscriber circuit whose call is detected to an outgoing register (not shown), and a load detection circuit 130 detecting the load state of the central processing unit 120 and outputting a call inhibition signal at the load state being a prescribed value or over is provided, and when the call inhibition signal outputted from the said load detection circuit 130 is transmitted to the subscriber circuits 110, 111, the call detection from the subscriber circuits 110, 111 is not transmitted to the central processing unit 120.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a call load control system in an automatic switching system.

PRIOR ART In the conventional automatic switchboard, when the central control unit δ is overloaded,
”, when a call detection report from the subscriber circuit is input to the central controller, the central processor receives the report,
Depending on the overload condition, the system is happy to process calls or not. Therefore, in the traditional dual call load control system, when a call is made when the central controller is overloaded, the central controller receives call detection from the subscriber circuit.
Since the process of determining whether or not to process a call is increased, there is a disadvantage that the number of overload states 1 increases further.

OBJECTS OF THE INVENTION It is an object of the present invention to solve the above-mentioned conventional drawbacks, and to prevent call detection reports from each subscriber circuit when the load state of the central control unit exceeds a certain level. An object of the present invention is to provide a call load control method that prevents an overload state of a central processing unit.

Structure of the Invention The call load control system of the present invention includes a subscriber circuit that detects a call from a subscriber telephone and reports it to a central fljj control device, and a circuit that receives a call detection report from the subscriber circuit and sends a call. In an automatic switching system equipped with a central control unit that processes calls, controls a main channel switch, and connects a channel, a load condition 1g of the central control device is detected, and a second load condition y is detected.
A load detection circuit that outputs a call prohibition signal at A1 is provided, each subscriber circuit has a built-in gate that is closed by the call prohibition signal, and the call detection report is output to the central processing unit through the gate. It is characterized by the following.

Embodiments of the Invention Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram illustrating one embodiment of the present invention. That is, extension telephones 101 and 102 are connected to main communication path switch 14 via subscriber circuits 110 and 111, respectively.
When the subscriber circuits 110 and Ill detect a call from the extension telephone by monitoring the loop state of the extension telephone 101 and 102, respectively, they send a call Ilf detection report to the central controller 120. Reference numeral 120 connects a subscriber circuit that has detected a call to a call register (not shown) to perform call processing, as in the prior art. However, in this embodiment, the central controller 12
a load detection circuit 130 that detects a negative previous state of 0 and outputs a call prohibition signal when the load state is equal to or higher than -;
When the call prohibition signal output from the load detection circuit 130 is sent to each subscriber circuit 11O2ill, the call detection from each subscriber circuit 110 and ill is detected by the central control unit 120.
This prevents it from being sent to Each subscriber circuit 110, etc., has a built-in gate 1-210 that is closed by the output of the load detection circuit 130, as shown in Fig. 21O
The data is configured to be sent to the central control unit 120 through the central controller 120.

Therefore, when the load state of the central control unit 120 exceeds a certain level, even if a call from the extension telephone 101, 102 is detected by the subscriber circuits 110, 111, etc., the gate 210 is closed and the call is not made. Call detection report is sent to central controller 1
20 is not sent.

As a result, the central control unit 1'20 does not have to perform the process of receiving the call detection and determining whether or not to process the call, and the load 111 on the central control unit 120 is not further increased due to the call. Defense 11. be done.

Therefore, the central controller 120 continues other processing, and when the load state of the central controller 120 eventually decreases, the call prohibition signal from the load detection circuit 130 is released and the normal state can be restored. .

It goes without saying that calls made only from the A telephone, and 71 calls from the L rank, etc., can be processed in the same way by the output of the load detection circuit 130.

Effects of the Invention As described in 1-1, in the present invention, f of the central control device is
When the busy state exceeds a certain level, the call detection report from the subscriber circuit is not sent to the central control unit.To prevent the pre-overload state from further increasing due to call processing and to continue other processing. It has the effect of being able to

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 is a block diagram showing details of the subscriber circuit of the embodiment 1-4. In the shout, 101, 102: extension telephone, 110.1
11: subscriber circuit, 120: central control unit, 130: load detection circuit, 140: main channel switch, 200: call detection circuit, 210: gate. Applicant: 11 Hondenki Co., Ltd. Agent Patent Attorney: Toshimune

Claims (1)

[Claims] IJI detects calls from subscriber telephones and sends them to the central control unit.
In an automatic switching system equipped with a subscriber circuit that sends a notification, and a central control unit that receives a call detection report from the subscriber circuit, processes the call, and controls the main channel switch to connect the channel. , comprising a load detection circuit that detects the load state of the central control unit and outputs a call prohibition signal 11-reliable when the load state exceeds a certain level, and has a gate in each subscriber circuit that is closed by the call prohibition signal. A call load control system, wherein the call detection report is output to the central control unit through the gate.