JPH0416093A - Interface circuit dispersed mount system - Google Patents

Abstract

PURPOSE:To simplify the check and maintenance and to reduce the initial investment as an equipment by using a signal wire in a shelf for interconnecting an interface circuit and a multiplex transmission circuit and forming equipments on a same shelf entirely. CONSTITUTION:A multiplex transmitter 1 consists of each of entirely same clock interface multiplex transmission system shelves 21-23. Each of the clock interface multiplex transmission system shelves 21-23 consists of a disposed clock interface circuit (31-33) and a multiplex transmission circuit (41-43) interconnected by an in-shelf clock signal transfer line (51-53) and clock signal transfer lines 51-53. Through the constitution above, an independent centralized clock interface circuit shelf is not required and the multiplex transmitter is configurated by one kind of shelf.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for configuring multiplex transmission equipment installed at telephone offices and telephone relay stations in telecommunications systems, and particularly to a method for mounting interface circuits.

[Conventional technology]

FIG. 2 shows the implementation method of a conventional multiplex transmission device.

As shown in FIG. 2, the multiplex transmission device 1 has N shelves 91 to
94. The interface circuit mounting system in this multiplex transmission device 1 had the configuration shown in FIG. In FIG. 3, a centralized clock interface circuit shelf 60 is connected to the outside of the device by an external interface 10, and also has a plurality of inter-shelf clock signal transfer lines 81.
-83 are connected to the multiplex transmission circuit shelves 71-73, respectively. A feature of the conventional interface circuit mounting method is that one of the N shelves 91 to 94 shown in FIG. 2 is used as the centralized clock interface circuit shelf 60, and the remaining shelves are used as the multiplex transmission circuit shelves 71 to 73. That's true.

[Problem to be solved by the invention]

In the conventional interface circuit mounting method described above, the clock interface circuit is concentrated on one shelf, so the clock signal transfer line connected to the multiplex transmission circuit is connected between shelves, and a circuit for signal transfer is required. Not only that, but the clock interface circuit itself requires a power supply circuit, which causes the problem of increased power consumption of the multiplex transmission device.

The interface circuit is also required when only a small number of multiplex transmission circuit cells are installed.

There is a problem in that the cost burden is large because the circuit is included in the initial investment, so to speak, and because the entire multiplex transmission device forms one system, inspection and maintenance are time-consuming.

Furthermore, in the conventional interface circuit mounting method, one shelf is used for the centralized clock interface circuit tank, which reduces the number of multiplex transmission circuit tanks to be mounted, and there is a problem that the entire device becomes physically large.

[Means to solve the problem]

The interface circuit distributed mounting method of the present invention, in a multiplex transmission device including a plurality of shelves, includes a distributed interface circuit connected to the outside of the device by an external interface, and a distributed interface circuit connected to the distributed interface circuit by an intra-shelf signal transfer line. This is a configuration in which a plurality of multiplex transmission system shelves each having a multiplex transmission circuit are mounted.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

Referring to FIG. 1 showing an embodiment of the present invention, a multiplex transmission apparatus 1 is composed of multiplex transmission system shelves 21 to 23 with identical clock interface circuits. Each of the multiplex transmission system with clock interface circuit shelves 21 to 23 has decentralized clock interface circuits 31 to 31 connected to the outside of the device by external interfaces 10 to 13.
33 and distributed clock interface times H@31-3
3 and multiplex transmission circuits 41-43 connected by intra-shelf clock signal transfer lines 51-53. This configuration eliminates the need for an independent centralized clock interface circuit box, and allows the multiplex transmission device to be configured with only one type of shelf.

In the above embodiment, the distributed implementation of the interface circuit for tarok signals has been described, but the present invention can be similarly implemented for interface circuits for control signals, alarm signals, and the like.

〔Effect of the invention〕

As explained above, according to the present invention, a simple in-shelf signal line can be used to connect the interface circuit and the multiplex transmission circuit, and a dedicated power supply for the interface circuit is not required, thereby reducing the power consumption of the device. can be achieved.

In addition, since all the devices are constructed of the same shelf, inspection and maintenance can be simplified on a shelf-by-shelf basis, and the initial investment for the device is reduced, making the device more economical.

Furthermore, since there is no need for a centralized interface circuit tank,
The device can be made smaller.

Intertwined multiple transmission system shelf, 31-33...Distributed clock interface circuit, 41-43...Multiplex transmission circuit, 51-53...Intra-shelf clock signal transfer line.

Claims (1)

[Claims] A multiplex transmission device comprising a plurality of shelves, which has a decentralized interface circuit connected to the outside of the device by an external interface, and a multiplex transmission circuit connected to the decentralized interface circuit by an intra-shelf signal transfer line. An interface circuit distributed mounting method characterized by mounting multiple system shelves.