JPS5866451A - Automatic switchboard - Google Patents

Abstract

PURPOSE:To reduce automatically the abnormal traffic quantity, by indisposing origination of operation for a telephone that has the service level lower than the specific value, in case the traffic value exceeds a prescribed level. CONSTITUTION:The service level information which is previously given to each telephone 1 is stored at a memory part 6. At the same time, the value with which the traffic quantity increases and a switchboard has a congestion state is stored in the memory part 6 along with a control level at which the incoming operation is controlled in the congestion mode of the switchboard. In a congestion mode, a central controlling part 5 controls a subscriber circuit 2 so as to inhibit an outgoing operation for the telephone 1 that has the service level lower than the control value.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic switching system, and is intended to effectively limit calls when the system becomes congested.

Traditionally, when the amount of traffic increases and the exchange becomes congested, the processing capacity of the entire exchange decreases, and no matter which phone you use to make a call, the exchange is always busy, making it impossible to make a call. Ta. Therefore, for example, whether the person using the telephone is a high-ranking person or an ordinary person, there is an inconvenience in that if the same exchange is used, it is impossible to make a call.

The present invention eliminates such drawbacks by assigning levels in advance to each telephone connected to an exchange in a stepwise manner according to priority, and setting a regulation level on the exchange in advance when traffic congestion occurs. At the same time, the traffic volume of the exchange is measured while the exchange is in operation, and when the traffic volume exceeds a certain value, the telephones that are below the regulation level are restricted from making calls, and only the telephones that are above the regulation level can make calls. This is what I did.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

FIG. 1 is a block diagram showing a portion related to traffic congestion of an automatic switching system according to an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing the same width suppression level.

1 is a telephone, 2 is a connection for detecting off-hook of telephone 1, supplying current, or sending out a signal tone 37. 3 is a central office line connected to the central office; 4 is a central office line trunk that detects incoming calls from the central office and sends calls from the exchange to the central office; 6
6 is a central control unit that controls all incoming and outgoing calls to the telephone 1, all incoming and outgoing calls to the central office line, or the entire switchboard; 6, necessary data is written to and read from the central control unit 6; 7 is an input device for inputting necessary information to the central control unit 6; 8 is a subscriber circuit 2;
, or a communication network that connects and disconnects office line trunks 4 under instructions from a central control unit 5.

Next, the operation of this automatic exchange will be explained.

What state is each telephone 1 in (for example, in the process of making a call,
All information (off-hook, dialing in progress, talking in progress, on-hook, etc.) is transmitted to the central control unit 6 via the subscriber circuit 2, and the central control unit 5 performs call processing based on this information. At the same time, regarding the operation of incoming calls from the office line 3, operational information such as incoming calls, calls, and call terminations is transmitted to the central control unit 5 via the office line trunk 4, and similarly, the central control unit 5 uses this information as a base. call processing.

Furthermore, in addition to these call processes, the central control unit 5 also performs
The traffic volume of the entire exchange is constantly measured based on information such as the call time per unit time of each telephone 1 and each office line, and the number of times the call could not be made.

Priority level (hereinafter referred to as service level) information given in advance to each telephone 1 is inputted from the input device 7 and stored in the memory part 6.

An abnormal value in which the amount of traffic increases and the exchange is likely to be congested, and a restriction level for restricting the outgoing operation at that time are also input and stored in the memory part 6.

During use, when the traffic volume of the entire exchange exceeds the abnormal value written in the memory part 6, the central control unit 6 enters into a congestion suppression operation. A specific example will be explained using FIG. 2. As shown in FIG. 2, the service level assigned to each telephone set 1 has 16 levels from 1' to 16', and the level increases as the number decreases. That is,
The service level of Duwakban is given to those who want to be able to communicate with them on a priority basis. Currently, the regulation level is set at level 4' as shown in FIG.

However, when the amount of traffic increases and the state is likely to be congested, the central bright part 6 is set so that calls cannot be made from telephones 1 that have been assigned a service level of 5' or higher. The subscriber circuit 2 is controlled.

If an attempt is made to make a call from the telephone 1 at this time, a busy tone is sent from the subscriber circuit 2 to the telephone 1, and no further operations can be made.

However, since there are no restrictions on the operation of receiving calls from other telephones 1, receiving calls is possible.

On the other hand, the central control unit 6 does not impose restrictions on the telephone set 1 to which a service level of 4' or lower is assigned even if the telephone set is likely to be congested, so that the telephone set 1 can freely make and receive calls.

Next, while the call operation is being regulated in this way, when the call gradually ends and the traffic volume falls below the abnormal value written in the memory section 6, the central control section 5 performs the above-mentioned control. The congestion suppression operation is canceled and all telephones 1 can make calls and use them normally again.

Furthermore, abnormal values, service levels given to each phone, and regulation levels can be freely set using input devices.
It is possible to suppress abnormal congestion suitable for the user.

As described above, according to the present invention, even if a traffic congestion situation occurs in the exchange, it is possible to make a normal call to a caller whose service level is higher than the regulation level. Therefore, it is possible to carry out efficient telephone calls, and also it is possible to automatically reduce abnormalities in the number of calls and automatically restore them.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a portion related to traffic congestion in an automatic switching system according to an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing the same width suppression level. 1...Telephone, 2...Subscriber circuit, 3
...Station 1ffl, 4...Station line trunk, 5...Central control unit, 6...Part of memory, 7...Input Device. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
figure

Claims (1)

[Claims] A means for measuring the amount of traffic and a step-by-step service level is assigned to each connected telephone, and when the amount of traffic exceeds a preset value, a means for measuring the amount of traffic is provided to the telephone whose service level is below a certain level value. On the other hand, an automatic switchboard is provided with means for disabling outgoing calls.