JPH04186937A - Line selecting system - Google Patents

Abstract

PURPOSE:To transmit and receive the data to and from plural transmission lines whose classifications are different by one card by providing interface parts whose classifications are different in the same card, and selecting a necessary interface part only at the time of transmitting and receiving the data. CONSTITUTION:When a control signal is received form a channel interface circuit corresponding to a line A, a multiplexing device knows that it is a call to a digital switching network by a multiplexing correspondence table of a line set in a main memory and a transmission line. On the other hand, it is known that a changeover switch in a selector is switched to the digital switching network interface part side by a switching direction correspondence table of the changeover switch in the selector of the line set in the main memory and the transmission line in the same way. By these information, a main controller can connect the circuit A and the digital switching network.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to high-speed digital switching networks and
This paper relates to a line selection method using a 5DN switching network.

[Conventional technology]

High-speed digital line and l5DN in conventional multiplexing equipment
The line connection method using a switched network is disclosed in Japanese Patent Application Laid-Open No. 64-4634.
As disclosed in Publication No. 0, when an l5DN line is used as a backup line in the event of a failure in the high-speed digital line, the l5DN line is not normally used and is only used when a failure occurs in the high-speed digital line. It looked like it was going to happen. In addition, an interface card for high-speed digital lines and an interface card for 15DN lines were installed for each interface.

[Problem to be solved by the invention]

In the conventional technology described above, the operation pattern is fixed once the usage conditions of the card are determined, and the time of development and the time of release to the market differ, so depending on the single line interface, cards dedicated to that interface are were provided separately.

An object of the present invention is to provide a common interface card that can be connected to a plurality of different types of interfaces, and to allocate data to correspond to the circuits of each interface in the interface card. The purpose is to allow one physical card to efficiently use lines for multiple different types of interfaces by handling it as an interface card and internally handling it as an interface card compatible with each interface.

[Means to solve the problem]

In order to achieve the above object, the multiplexing device of the present invention includes means for providing ports corresponding to a plurality of different types of transmission paths in the same card for each interface. The main controller identifies whether the data is for the interface transmission path, and the main controller connects to each transmission path by controlling the changeover switch for each interface section installed in the interface card. It is something.

[Effect]

Although the interface card of the multiplexing device can be physically connected to a plurality of different types of transmission paths, each interface section is used exclusively in terms of time. In other words, the main controller of the multiplexer identifies which interface unit receives the control signal from the line, and uses a changeover switch in the selector of the interface card to select the interface unit that first detected the control signal. Switch. Accordingly, any interface section necessary for connection is selected.

Further, since the changeover switch remains in operation while data is being transmitted and received, no other interface section is selected.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

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

In FIG. 1, 1 and 6 are multiplexing devices, 2 is a digital switching network, 3 is an 15DN switching network, and 4 and 5 are common interface cards between the digital switching network and the 15DN switching network.

Note that A is a line compatible with a digital switching network, and B is a line compatible with a digital switching network.
This line is compatible with the 5DN switching network.

FIG. 2 is a block diagram of the multiplexing device. In FIG. 2, an interface card 4 is connected to a digital switching network interface unit 5. 15DN exchange network interface department 6. It consists of a selector 7, and the interface section corresponds to each switching network.

The interface card 4 is connected to a channel interface circuit 9 corresponding to lines A and H via a one-time division multiplex switch 8. Further, these connection controls are controlled by the main controller 10 based on data set in the main memory 11.

Next, a line selection method for connecting one line A to the digital switching network 2 will be explained using FIG.

When the multiplexing device receives a control signal from the channel interface circuit corresponding to line A, it stores the multiplexing correspondence table between lines and transmission paths (shown in Figure 3) set in the main memory.
) indicates that the call is to the digital switching network.

On the other hand, based on the switching direction correspondence table (shown in Figure 4) of the changeover switch (not shown) in the selector between the line and the transmission path, which is also set in the main memory, You can see that you can change the changeover switch.

Based on this information, the main controller can connect line A to the digital switching network.

The changeover switch in the selector is kept switched until data transmission/reception between line A and the digital switching network is completed, and at the same time, while the changeover switch is switched to the digital switching network side, the switch is switched to the 15DN switching network interface side. This indicates that the device is in use.

〔Effect of the invention〕

According to the present invention, in a multiplexing device having a plurality of line interfaces of different types, the interface parts of different types are installed in the same card, and by selecting the necessary interface part only when transmitting and receiving data, one card can be used. Since data can be sent and received over a plurality of different types of transmission lines, resources can be used commonly and effectively, and can also be used as backup for each line.

[Brief explanation of the drawing]

FIG. 1 is a system block diagram showing an embodiment of the present invention;
Figure 2 is a block diagram of the multiplexing device, Figure 3 is an explanatory diagram of a multiplexing correspondence table between lines and transmission lines, and Figure 4 is an explanation of the correspondence between the switching directions of the changeover switches in the selector between lines and transmission lines. It is a diagram. 1.6...Multiplexing device, 2...Digital switching network. 3...l5DN exchange network, 4...interface card. Ten q komata Ryōkai is in a relationship with Ai and Iunsho J.

Claims (1)

[Claims] 1. The interface card is equipped with interface sections for a plurality of different types of transmission lines, and which interface section to use is identified by a control signal from a control device, and the interface is adapted to the available lines. A line selection method characterized by selectively using parts of the network.