JPS62169562A - Selection system for key number subscriber - Google Patents

Abstract

PURPOSE:To improve the processing efficiency for selection of a receivable subscriber line and to avoid adverse influence on system performance, by selecting optionally the selection start position of an incoming subscriber line based on a key subscriber list set previously. CONSTITUTION:A random number generator part 2 produces a value which starts the selection of an incoming terminal at and after an optional number in a subscriber list 1 when an incoming call is given to the key number of an exchange system 31. A key subscriber selection processing part 3 converts the generated random numbers into a certain value of the continuous numbers in a key number subscriber line group when the key number is received with respect to the group 3. Then the selection start position of the list 1 of the group 3 is decided and a subscriber line is caught. Hereafter, the selection is carried out based on the numbers of the list 1 and incoming-enable subscribers are searched successively up to the key subscriber that started selection. If an incoming-enable subscriber is detected, the relevant subscriber line is caught for incoming.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an electronic exchange system employing a moss stirring program control method, and in particular to a representative subscriber selection method (prior art). In this method, when a call is received from a representative number for a representative number subscriber line group consisting of multiple subscriber lines, the representative subscriber selection method is generally based on the subscriber list of the representative number subscriber line group. Since it must be controlled, the selection method has a certain priority.

FIG. 4 is a block diagram showing an example of a representative subscriber selection method. In FIG. 4, 41 is an electronic exchange system;
2 are telephones connected to the representative number subscriber line, 43 to 47;
are telephones with a low selection order. In the example shown in FIG. 4, the incoming terminals are selected in accordance with the order of the subscriber list of the representative number subscriber line group set in advance.

(Problems to be Solved by the Invention) In the conventional representative subscriber selection method described above, a subscriber line that can receive calls is searched in accordance with the order of the subscriber list of the representative number subscriber line group set in advance. There is.

In such a system, in the case of a representative number subscriber line group with a small call volume, there is no problem because a subscriber line that can receive calls quickly can be selected. However, in general, the number of calls to the representative number subscriber line group is large, so the subscriber line registered at the beginning of the subscriber list is often in use, so there is a probability that the call cannot be received. is high. This forces a considerable amount of wasteful operational processing until a subscriber line on which calls can be received is selected, which can have a negative impact on system performance in the case of large-capacity, high-traffic representative groups. Monana 9, this is not a very desirable method. Furthermore, if a failure occurs in a subscriber line, when that subscriber line is selected, the subscriber will not be able to respond even if N calls are made. However, once a fault occurs in a subscriber line with a high selection value of +111f, the fault occurs frequently.

An object of the present invention is to eliminate the above-mentioned drawbacks and prevent the frequency of failures from increasing by arbitrarily selecting a representative group subscriber line from a selection start position based on a preset representative subscriber list. The purpose of the present invention is to provide a structured representative subscriber selection method.

(Means for determining problems) The representative subscriber selection method according to the present invention includes a representative number subscriber line group subscriber list, a random number generator, and a representative number subscriber line group selection processing unit. It is composed of

The representative number subscriber line group subscriber list is for presetting representative subscribers.

The random number generator is for generating random numbers used when selecting an empty subscriber line based on the representative number subscriber line group subscriber list.

The representative number subscriber line group selection processing section is provided to arbitrarily select the incoming terminal using the random number generator.

(Example) Next, the present invention will be explained with reference to the drawings.

The representative subscriber selection system according to the present invention is constructed by adding the components shown in FIG. 1 to the representative subscriber selection processing section in the electronic switching system of the stored program control system. In FIG. 1, 1 is a representative number subscriber line group subscriber list, 2 is a random number generator, and 3 is a representative number subscriber line group selection processing section.

The subscriber list of the representative number subscriber line group shown in Figure 1 is as follows:
This is set in advance by a maintenance operator's command, and each representative subscriber is given consecutive identification numbers within the representative number group according to the order of registration.

Further, the random number generator section generates a value that starts selection of the incoming terminal from any number in the subscriber list when a call is received to a representative number in the exchange system.

When a representative number for a representative number subscriber line group is received, the representative subscriber selection processing unit changes the generated random number to a value that includes consecutive numbers in the representative number subscriber line group. The selection start position of the subscriber list of the subscriber line group is determined, and the process of acquiring the subscriber line is executed. After that,
A selection process is executed according to a number in a preset subscriber list, and a search for subscribers who can receive calls is executed sequentially until returning to the representative subscriber who started the selection. When a subscriber capable of receiving a call is detected, the subscriber line is acquired and the call is received.

FIG. 2 is a flow diagram illustrating the above processing logic for selecting a callable subscriber number from the group of representative number subscriber lines in FIG. FIG. 3 is an explanatory diagram showing the selection processing order of the representative number subscriber line group shown in FIG. 1. In FIG. 8, 31 is an electronic switching system, 32 is a telephone connected to a representative number subscriber line, and 33 to 37 are telephones having a low selection order.

(Effects of the Invention) As explained above, the present invention enables selection of subscriber lines that can receive calls by arbitrarily selecting the selection start position of N subscriber lines based on a representative subscriber list set in advance. This has the effect of increasing processing efficiency and preventing adverse effects on system performance. Furthermore, by equally incoming calls to the subscriber lines constituting the representative number subscriber line group, it is possible to reduce the number of invalid calls when a failure occurs for subscriber i.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of a representative subscriber selection method according to the present invention. FIG. 2 is a flow diagram illustrating the processing logic of FIG. FIG. 8 is an explanatory diagram showing the selection processing order of the representative number subscriber line group in FIG. 1. FIG. 4 is an explanatory diagram showing the conventional representative number subscriber line group selection processing order. l... Representative number subscriber line group subscriber list 2... Random number generator

Claims (1)

[Claims] A representative number subscriber line group subscriber list for presetting a representative subscriber, and a random number used when selecting an empty subscriber line based on the representative number subscriber line group subscriber list. A representative subscriber selection method for an electronic switching system comprising a random number generating device for generating random numbers, and a representative number subscriber line group selection processing unit for arbitrarily selecting an incoming terminal by the random number generating device.