JPH04275797A - Multiplexed line control system - Google Patents

Abstract

PURPOSE:To set plural logical interfaces for different purposes of use on a physically single interface, and efficiently and flexibly divide the plural logical interfaces on a digital multiplexed line to make them usable. CONSTITUTION:The multiplexed line control system is made by separating a digital multiplexed line interface device 6 to control a physically single interface and a signal link controller 8 to control a signal link, and connecting the two devices with a time switch 2. Therefore, it can set plural logical interfaces for different purposes of use on a physically single interface, and efficiently and flexibly use the digital multiplexed line.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is a system that performs communication using digital multiplex lines, in which a plurality of logical interfaces for different purposes of use are set on one physical interface, and each interface is This invention relates to a multiplex line control method.

0002

[Prior Art] Communication systems, typified by digital private branch exchanges that construct in-house networks, use digital multiplex lines to centralize media such as voice, data, and images, and to make network services more sophisticated, economical, and highly efficient. We are trying to build trust. In particular, NTT has been planning to provide PBX-to-PBX connection services since 1991, and the need for so-called private ISDN is increasing.

However, in the conventional system, the control unit that physically controls one interface and the control unit that controls the signal link are integrated, and one physical interface can be used for multiple It is not clear how to set up logical interfaces and control each interface.

0004

[Problem to be Solved by the Invention] In the above-mentioned conventional technology, the control unit that controls one physical interface and the control unit that controls the signal link have a one-to-one correspondence, and the control unit that controls one physical interface has a one-to-one correspondence. However, there is no consideration given to dividing the interface by purpose of use, for example, by attribute or by route. There was a problem in that it could not be used in a flexible manner.

An object of the present invention is to set up a plurality of logical interfaces for different purposes on one physical interface, and to efficiently and flexibly divide and use digital multiplex lines according to purposes. .

[0006]

[Means for Solving the Problems] In order to achieve the above object, the multiplex line control system of the present invention physically separates the control section that controls one interface and the control section that controls the signal link, and The two are connected by a time switch.

[0007]

[Operation] The signal link control section is physically connected to a control section that controls one interface through a time switch. As a result, a control section that controls a plurality of signal links is connected to a control section that physically controls one interface, and a plurality of logical interfaces with different purposes of use can be set for one physical interface.

[0008]

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1 shows a private electronic switching system, which is a general communication system that accommodates digital multiplex lines. In FIG. 1, an exchange 1 includes a time switch 2, a central control device 3, a storage device 4, and an input/output control device 5.
, a digital multiple line interface device 6, an extension line interface device 7, a signal link control device 8, and a multiplexing device 9, and accommodates a maintenance terminal 10, a digital multiplex line 11, and an extension terminal 12.

The above is the logical configuration of the parts closely related to the present invention in this embodiment, and devices other than those described above that are generally required for a private branch exchange system have been omitted.

Next, using FIG. 2, the digital multiplex line 1
1 into root 1 and root 2 will be explained. A digital multiplex line has 24 information channels multiplexed onto one physical interface. In the example shown in FIG. 2, the information channel on one physical interface is physically divided into two, and one of the information channels is connected to the signal link controller 8 through the time switch 2, and any one of the multiplex lines is connected to the signal link controller 8 through the time switch 2. Control channels are set in time slots to control signal links for each route.

[0012] Furthermore, in small-scale networks with little traffic, there may be cases where only a few 64kbps communication paths are required, and the standard 64kbps communication path is used for these lines.
Using bps control channels is inefficient. In such a case, as an application of the present invention, by connecting the signal link control device to the multiplexing device, 8 kbps, 1
Control channels can be controlled at subrates of 6 kbps and 32 kbps, and the remaining portion can be used for communication.

[0013]

According to the present invention, a plurality of logical interfaces can be set on one physical interface depending on the purpose of use, so that digital multiplex lines can be used efficiently and flexibly.

[Brief explanation of the drawing]

FIG. 1 is a system configuration diagram showing an embodiment of the present invention.

FIG. 2 is a connection example of a signal link control unit in an embodiment of the present invention.

FIG. 3 is an example of a connection when using a multiplexing device according to an embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1... Switchboard, 2... Time switch, 3... Central control device, 4... Storage device, 5... Input/output control device, 6... Digital multiple line interface device, 7... Extension interface device, 8... Signal link control device, 9... Multiplexer.

Claims (1)

[Claims] Claim 1: A communication system that performs communication using a digital multiplex line, comprising: a control unit that physically controls one interface; a control unit that controls a signal link;
A multiplex line control method consisting of a time switch that sets multiple logical interfaces for different purposes on one physical interface and controls each interface.