JPS6146693A - Extension representation system in trunk line separate incoming - Google Patents

Abstract

PURPOSE:To eliminate the deviation of a traffic to a specific pilot number in an extension group by modifying sequentially orders of a pilot extension and an entension representation. CONSTITUTION:When an incoming from a trunk line is obtained, a central control unit 2 reads out the corresponding extension number (for instance, a subscriber A) from a trunk line corresponding extension number memory circuit 6. When the subscriber A is idle, a trunk line incoming call signal is transmitted to the subscriber A. After the central control unit 2 reads out the corresponding extension number from the memory circuit 6, an extension subscriber (for instance, subscriber B) given the secondary priority is read out from an extension representation group memory circuit 5, and stored in the corresponding address of the memory circuit 6. Consequently, when the incoming is obtained from the trunk line, the subscriber B is called as a pilot extension.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to individual call reception on a central office line of an automatic private branch exchange, and particularly to an extension representative system.

Conventional technology Conventionally, the extension representative method for receiving individual calls from this type of central office line was as follows:
Incoming calls from an external office line were connected to a specific pilot number within a predetermined extension representative group, and if this number was busy, another number within the group was selected in a fixed order.

Therefore, there is a drawback that the traffic is high only for the extension terminal equipment with a specific pilot number, while the traffic for other extension terminal equipment in the group is low and the traffic is large.

Problems to be Solved by the Invention An object of the present invention is to provide an extension representative system that solves the above-mentioned drawback, that is, the traffic is high only for extension terminal equipment with a specific pilot number within an extension group. It is in.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides, in an automatic private branch exchange, a switch network, a central control unit, a plurality of line circuits respectively connected to both, and at least one The present invention employs a configuration in which a number of incoming office line trunks, an extension representative group storage circuit and an extension number storage circuit corresponding to the office line are connected to the central control unit. Therefore, for each incoming call from a central office line, the stored extension number of the central office line corresponding extension number storage circuit 6, which stores the extension number to be called, is changed according to the priority order stored in the extension representative group storage circuit 5. Since the changes are made sequentially within the group, it is possible to eliminate traffic jams and delays in the extension terminal equipment of a specific pilot number within the extension group.

Example Next, embodiments of the present invention will be described with reference to the drawings.

In FIG. 1 showing a block configuration diagram of an actual example implementing the present invention, an automatic private branch exchange for receiving individual calls on a central office line according to the present invention is connected to a switch network 1, a central control device 2, and both of these, respectively. a decimal line circuit 3;
It also comprises at least one incoming office line trunk 4 connected to both, an extension representative group storage circuit 5 and an extension number storage circuit 6 connected to the central control unit 2.

Further, a plurality of extension terminals 7 such as extension telephones are each connected to a plurality of line circuits 3, and one or more external office lines are similarly connected to one or more terminating office line trunks 4, respectively.

Next, referring to FIG. 1, we will explain the operation of the extension representative system for receiving individual calls from the central office line according to the present invention.0 First, in FIG.
When a call is received from the central office line, the incoming central office line trunk (CICT)
When the central controller 2 receives the detection of the incoming office line by scanning the office line trunk, the central control unit 2 detects the incoming call at the office line corresponding extension number storage circuit 6.
CICT) Read the extension number (pilot extension) corresponding to 4. If the read extension number is extension subscriber A (E
X-A), then the central controller 2 determines whether the extension subscriber A (EX-A) is idle or busy.
CA) to scan and identify.

If extension subscriber A (EX-A) is empty, line circuit 3
The central office line incoming call signal sending order is sent to A (LCA) of A (LCA).

When extension subscriber A (EX-A) is busy, the central controller 2 selects extension subscriber A (EX-A) from the extension representative group storage circuit 5.
Extension numbers that form a group with EX-A) (temporarily extension subscriber B (EX-B) and extension subscriber C (EX-C)
B (L) of line circuit 3 is read out.
CB), C (LCC) of line circuit 3 is scanned to identify whether the extension subscriber is empty or busy. If extension subscriber B (EX-B) is empty, the line circuit 30B (LCC) is ), the central controller 2 sends the extension number (pilot) corresponding to the terminating office line trunk (CICT) 4 to the office line corresponding extension number storage circuit 6. After reading out the extension (extension), the extension representative group storage circuit 5 reads out the next priority extension subscriber to be assigned to the extension representative group of the pilot extension (assuming that this is called extension subscriber B (EX-B)). do)
0 Then, the extension number of this extension subscriber B (EX-B) is stored in the terminating office line trunk (C
ICT) Temporarily stored at the address corresponding to 4.

Next, when a call is received on the same terminating central office line trunk (CICT) 4, the central controller 2 stores the extension number (
When reading out 1 line in the pilot, extension subscriber B (EX
-B) is read out and becomes the pilot extension, and the extension subscriber (EX-B) has the highest priority to be called.

Next, in the central control device 2, the extension representative group storage circuit 5 and the pilot extension (extension subscriber B (EX
- B)) Read out the extension subscriber C (EX-C) who belongs to the extension representative group and will be missed at the next destination. Next, the extension number of extension subscriber C (EX-C) is stored in the terminating office line trunk (
CICT) 4 should be temporarily stored at the address corresponding to K.
Therefore, when the next call arrives at the terminating central office line trunk (CICT) 4, the pilot extension is the extension subscriber C (EX-
C).

FIG. 2 shows the priority transition of pilot extensions and extension representatives. Since the rankings of pilot extensions and extension representatives shift as shown in the following, the traffic of each extension is averaged.

Furthermore, the above flowchart is shown in FIG. 3 to make it easier to understand.

Effects of the Invention As explained above, according to the present invention, by sequentially changing the pilot extension for each incoming call to a central office line, it is possible to eliminate fluctuations in traffic of extension terminal equipment such as telephones. There is.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an embodiment of an automatic private branch exchange that implements the system of the present invention, Fig. 2 is a diagram showing an example of pilot extensions and priorities of the extension representative system of the present invention, and Fig. 3 is a diagram of the present invention. FIG. 3 is a flowchart diagram showing the operation of the invention. 1...Switch network (SW), 2...
... Central control unit, 3 ... Line circuit (L
CA, LCB. LCC), 4... Terminating office line trunk (CICT)
), 5...Extension representative group storage circuit, 6...
...Extension number storage circuit for office line, 7...Extension terminal equipment (EX-A, EX-B, EX-C), A, B
, C...Extension subscriber. 1536-

Claims (1)

[Claims] It consists of a switch network, a central control device, a plurality of line circuits and at least one terminating station line trunk connected to each of the above, and an extension representative group storage circuit connected to the central control device, and an external In an extension representative system for receiving individual calls from a central office line in an automatic private branch exchange in which incoming calls from a central office line are automatically connected to a pilot extension within a predetermined extension representative group, the central office line corresponding extension number storage circuit is 1. An extension representative system for receiving individual calls from a central office line, which is connected to and added to a control device, and is configured such that the order of pilot extensions in an extension representative group is changed for each received call.