JPH0425236A - TDM line connection method - Google Patents

Abstract

PURPOSE:To eliminate the need for replacement of a line cable when the interface of an equipment to be connected is changed by switching mechanically a signal line in matching with the interface of an equipment to be connected to a multiplex collecting/delivering equipment (TDM). CONSTITUTION:When a TDM and a terminal equipment are connected, a pin R (reception pin) and a pin S (transmission pin) of the receptacle of the TDM are connected to pins S, R of the receptacle of the terminal equipment respectively by the connection of a switch 1. On the other hand, when the TDM and a MODEM are connected, since the position of the pins S, R are opposite between the MODEM and the terminal equipment, the switch 1 is connected so that the pins S, R of the TDM are respectively connected to the pins R, S of the MODEM. In this case, since the signal line polarity is switched at the TDM, the cables in use are unified to be straight cables only regardless of connected equipments. Thus, the cost is reduced and man-hour for connection is saved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a line cable connection in a communication processing system, and is a line connection method suitable for reducing costs, saving labor in line construction, and preventing erroneous connections. [Prior art] Conventionally, when connecting devices such as terminals and modems to TDM, different types of line cables were used depending on the interface of the device. The only thing I needed to do was to diagnose whether it was. Note that related to this type of technology is Japanese Patent Application Laid-Open No. 14256/1983.

[Problem to be solved by the invention]

Conventionally, to connect a TDM to various devices, it was necessary to use a dedicated cable depending on the interface of the device to be connected, and it was not possible to switch signal lines on the TDM side. Therefore, when replacing a device connected to the TDM, if the interface of that device is different from the device before replacement, the line cable must also be replaced at the same time, resulting in new costs and the need for line construction. There were problems such as the possibility of erroneous connections occurring after replacement.

The present invention eliminates the need to replace line cables regardless of the device interface when replacing a device connected to a TDM, and aims to reduce costs and line construction and prevent line failures due to connection errors.

[Means to solve the problem]

In order to achieve the above object, a function is added to the line cable connection section of the TDM to mechanically switch the signal line in accordance with the interface of the device connected to the TDM.

[Effect]

Since the signal line is mechanically switched according to the interface of the device connected to the TDM, there is no need to replace the line cable even if the interface of the device connected changes.

〔Example〕

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

When connecting the TDM and the terminal, the TDM socket R (
Set switch 1 as shown in the figure so that the receiving pin) and S (transmitting pin) can be connected to S and R of the terminal socket, respectively.

On the other hand, when connecting a TDM and a modem, the positions of S and R in the modem socket are reversed from those of the terminal socket, so it is necessary to connect the S and R of the TDM to the R and S of the modem. To do this, turn the switch as shown.

Conventionally, when replacing a device connected to a TDM from a terminal to a modem, it was necessary to change the cable from a straight cable that connected the TDM and the terminal to a reverse cable. However, as shown in this embodiment, since the signal line is switched on the TDM side in the present invention, all cables can be unified into straight cables regardless of the connected device, reducing costs and labor-saving connection work. I can figure it out.

〔Effect of the invention〕

According to the present invention, since the signal line is switched on the TDM side according to the interface of the connected device, there is no need to replace the cable when replacing the connecting device. This has the effect of reducing costs, saving labor for single-line construction, and preventing connection errors.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a line connection state according to the present invention.

Claims (1)

[Claims] 1. In a multiplex distribution device (TDM) and various devices connected to the TDM via drop-line cables, the TDM mechanically switches the signal line according to the interface of the connected device, without replacing the line cable. A TDM line connection system characterized by enabling connection exchange to devices with different interfaces.