JPH03250958A - Communication controller - Google Patents

Abstract

PURPOSE:To keep the same service performance even when the capacity of a transmission line is forcibly decreased by providing a control means controlling the system such that a trunk not affected by the decrease in the capacity of the transmission line is acquired when a trunk to be acquired possibly encounters an access at a decreasing revision time of the capacity of the transmission line. CONSTITUTION:At first, information relating to a call request is sent to a time slot commander 6. The time slot commander 6, based on the content stored in a revision time storage device 4, selects an optional idle time slot from a time slot attribute storage device 5 when, e.g. an average holding time of one talking is 3min and a current time is 12:00 hours to 3min or over and informs the information to an exchange 14a. On the other hand, when the current time is 12:00 hours to 3min or less, the time slot commander 6 searches a time slot other than those interrupted forcibly when the line capacity is set decreasingly among idle time slots from the time slot attribute storage device 5 and informs the information to the exchange 14a.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention (Field of Industrial Application) The present invention relates to a communication control device used in a communication system such as a corporate information communication network.

(Prior Art) Conventionally, it has not been possible to forcibly change the capacity, etc. of a network constructed using a dedicated line on the network side.

In recent years, in order to operate such networks more efficiently, services have been considered that forcefully change the capacity of the transmission path on the network side at a time specified by the user.

However, in this case, when the capacity of the transmission path is forcibly reduced, there is a risk that the call in progress may be disconnected.

(Invention or problem to be solved) In this way, in communication systems such as corporate information communication networks, is there a service that forcibly changes the capacity of the transmission path on the network side at a time specified by the user? , when the capacity of the transmission path is forcibly reduced, there is a risk that calls in progress may be disconnected.

The present invention has been made based on the above circumstances, and in a system where the capacity of the transmission line can be forcibly changed on the network side at a time specified by the user, when the capacity of the transmission line is forcibly reduced. The purpose of the present invention is to provide a communication control device that does not reduce serviceability even when

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a communication system in which the capacity of a transmission line connecting exchanges is changed at a preset time, in which a trunk to be captured is changed depending on the capacity of the transmission line. The present invention is characterized by comprising a control means for controlling to acquire a trunk that is not affected by the reduction in the capacity of the transmission line when there is a possibility that the change in the capacity of the transmission line is about to change.

Further, the second invention provides a communication system in which the capacity of a transmission line connecting exchanges is changed at a preset time,
If the captured trunk is cut off due to a change in the capacity of the transmission path, the present invention is characterized by comprising a notification means for making a predetermined notification to the side using the captured trunk.

Furthermore, a third invention provides a communication system in which the capacity of a transmission line connecting exchanges is changed at a preset time, and when a captured trunk is disconnected due to a change in the capacity of the transmission line, reoccurrence may occur. This system is characterized by having a re-calling means for making a call and re-acquiring the trunk.

(Function) In the present invention, if there is a possibility that the trunk to be captured is at a time when the transmission line capacity is changed, control is performed to capture a trunk that is not affected by the reduction in the transmission line capacity. , even when the capacity of the transmission line is forcibly reduced, serviceability does not deteriorate.

(Example) Hereinafter, details of embodiments of the present invention will be explained based on the drawings.

FIG. 1 is a diagram showing the configuration of a communication control device according to an embodiment of the present invention.

The communication control device 1 shown in the figure includes a communication interface 3 for exchanging signals with a switchboard (PBX) 2, a change time storage device 4 for storing the time at which the line capacity changes,
The time slot attribute storage device 5 stores the usage status of each time slot and whether or not each time slot is fixed, and when a connection request is made, the information is stored in the change time storage device 4 and the time slot attribute storage device 5. A time slot designation device 6 is provided which allocates time slots based on the content.

The communication control device 1 also includes a time slot switching instructing device 7 that issues a time slot switching instruction when there is an empty time slot based on the contents stored in the time slot attribute storage device 5 when the change time approaches; A message output device 8 outputs a predetermined message to the terminal when there is no free time slot based on the contents stored in the time slot attribute storage device 5 when the time approaches, and the call is forcibly disconnected at the change time. A re-call instructing device 9 is provided which re-calls in case of an emergency.

FIG. 2 is a diagram showing an example of a communication system to which the communication control device 1 configured as described above is applied.

In the same figure, 10a, 10b... are network side stations (CN
E), and each station 10a, 10b- has a dedicated line 1.
1 to line termination units (DSUs) 12a, 12b...
is connected. The user side terminals 13a, 13b... are connected to the line termination devices 12a, 12b... via exchanges (PBX) 14a, 14b... and multiplexers (TDM) 15a, 15b... Ru. The communication control devices 1a, 1b, . . . described above are connected to the exchanges 14a, 14b, .
・Connected to.

The operation of the communication control device will be explained using this system as an example.

Currently, the line capacity is set to decrease between the line terminating device 12a and the line terminating device 12b at 12:00, and the current time is before 12:00, and the line capacity between the line terminating device 12a and the line terminating device 12b is Assume that it is in an increasing state.

In this state, when a call request is made from the terminal 13a to the terminal 13b, the communication control device 1a performs the following processing.

First, information regarding this call request is sent to the time slot indicating device 6.

Based on the contents stored in the change time storage device 4, the time slot designation device 6 determines the time slot designation when, for example, the average holding time of a call is 3 minutes and the current time is 3 minutes or more before 12:00. An arbitrary free time slot is selected from the attribute storage device 5 and this information is notified to the exchange 14a. On the other hand, when the current time is less than 3 minutes before 12 o'clock, the time slot attribute storage device 5 specifies that all empty time slots other than the time slots that will be forcibly disconnected when the line capacity is set to decrease. It searches for a time slot and notifies the exchange 14a of this information.

Therefore, according to this embodiment, the chances of a call being forcibly disconnected are greatly reduced.

In this example, the condition for restricting the allocation of vacant time slots is the average holding time of one call, but the user may set it arbitrarily, for example, by setting the average holding time of one call as the condition for restricting the allocation of vacant time slots. % or more may be set.

Further, the time at which the line capacity changes, which is stored in the change time storage device 4, may be set separately for each device, or may be notified via a network or public network.

Next, an explanation will be given of the operation when the change time comes while a call is being made using a time slot that is disconnected at the change time.

When such a change time comes, the time slot switching instruction device 7 forcibly disconnects the available time slots when the line capacity is set to decrease based on the contents stored in the time slot attribute storage device 5. Find a time slot other than the time slot specified. If there is an empty time slot that meets these conditions, a request to change to this time slot is notified to the exchange 14a.

On the other hand, if there is no free time slot that meets these conditions, the message output device 8 sends a message to the terminal 13a to terminate the call.

At the terminal 13a, this notification is announced by voice or display using a liquid crystal display.

Further, in this case, if the call is continued, the call will be disconnected, but in that case, the call re-call instruction device 9 will re-call.

Therefore, in this embodiment, the user does not have to make a re-call.

In the above embodiment, each operation is performed as a series, but they may be performed separately or in any combination.

Further, the communication control device of the present invention may exist separately as in the above-mentioned embodiments, or may be incorporated into an exchange or the like.

[Effects of the Invention] If there is a possibility that the trunk to be captured is at a time when the transmission line capacity will change, the control is performed to capture the trunk that will not be affected by the reduction in the transmission line capacity. Even when the capacity of the service is forcibly reduced, serviceability does not deteriorate.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of a communication control device according to an embodiment of the present invention, and FIG. 2 is a diagram showing an example of a communication system to which the communication control device of FIG. 1 is applied. 1... Communication control device, 2... Exchange (PBX),
3... Communication interface, 4... Change time storage device, 5... Time slot attribute storage device, 6... Time slot instruction device, 7... Time slot switching instruction device, 8... Message Output device, 9... Recall instruction device.

Claims (3)

[Claims] (1) In a communication system in which the capacity of a transmission line connecting exchanges is changed at a preset time, if there is a possibility that the trunk to be captured will fall at the time when the capacity of the transmission line is changed, 1. A communication control device comprising control means for controlling to seize trunks that are not affected by a reduction in the capacity of a transmission path. (2) In a communication system where the capacity of a transmission line connecting exchanges is changed at a preset time, if a captured trunk is disconnected due to a change in the capacity of the transmission line, this captured trunk What is claimed is: 1. A communication control device comprising a notification means for giving a predetermined notification to a user. (3) In a communication system where the capacity of the transmission line connecting exchanges is changed at a preset time, if the captured trunk is disconnected due to a change in the capacity of the transmission line, a call is made again and the trunk is disconnected. A communication control device characterized by comprising re-calling means for seizing a trunk.