Optical waveguides – Accessories
Patent
1996-12-30
1998-09-08
Ngo, John
Optical waveguides
Accessories
G02B 636
Patent
active
058057560
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The subject matter of the invention relates to a subrack for accommodating modules, in which and a multiple-plug connector.
2. Description of Prior Art
A module subrack having the features specified is disclosed by EP 0511779.
In a subrack, a plurality of modules are combined to form a mechanically stable unit. Modules which have components receiving or transmitting optical signals must be connected to other modules via optical fibers transporting optical signals. In a case where the connections are made by individual optical fibers, it is found that the production cost is high, for subracks having a different connection structure it being necessary for this structure to be taken into account and, in addition, there being a constant risk of transpositions. In a case where the wiring is carried out conventionally using bundles of optical fibers, it is disadvantageously found that the ends of the individual optical fibers must, in general, be fed to different modules, with the result that the bundle of optical fibers has to be separated with a great deal of effort.
In the case of the subrack disclosed by EP 0511779, the optical output element of each module is connected to all the input elements of the other modules. This concept requires selection on the individual modules of the information intended for them.
The application is based on the problem of indicating a particular configuration for the connections between the modules of a subrack which is largely standardized, simple and can be produced free of errors, and in addition allows feeding only of the information which is intended for the relevant module.
SUMMARY OF THE INVENTION
In the case of the subrack mentioned at the beginning, the problem is solved in that optical fibers and a multiple-plug connector, connections is provided between the individual optical fibers of the bundles of optical fibers connected to the routing module.
The subject matter of the application accomplishes simple connectability of a module of the subrack in a single operation, whilst excluding transpositions. Uniform connecting lines can be provided for different subracks for the connections between the modules and the routing module, the assignment of the individual wave-guides being provided solely by the routing module. By means of exchanging the pluggably arranged routing module for a routing module having a different assignment of the individual connections, a simple capability is provided for changing the assignment of the connections of the modules of a subrack. The subject matter of the application therefore accomplishes a standardization of the connections between modules for subracks having is different connecting functions, whereby the subrack can be prefabricated to a very large extent. The optical signals which are fed to the subrack and are forwarded by the subrack are fundamentally passed via two stages, that is to say via the routing module and the relevant module, with the result that the dynamic requirements of the input stage of the receiver of the optical signals are reduced in comparison with arrangements in which the optical signals are passed partly via only one stage and partly via two stages.
In accordance with the present invention, a module subrack assembly is provided that comprises a subrack that accommodates at least one routing module in addition to one or more conventional modules. Each conventional module is connected to an input port of the routing module by a linking optical fiber bundle. Each linking fiber optical bundle includes two ends, both of which are attached to multiple-plug connectors. One multiple plug connector is attached to the conventional module and the other multiple-plug connector is attached to an input port of the routing module.
The routing module further includes one or more output ports which, in turn, accommodate a multiple-plug connector that is attached to an output optical fiber bundle. The routing module provides the connection between an individual optica
REFERENCES:
patent: 5090792 (1992-02-01), Koht et al.
patent: 5204929 (1993-04-01), Machall et al.
patent: 5448675 (1995-09-01), Leon et al.
Burghardt Hartmut
Gruhler Ulrich
Schreck Hans-Gunther
Ngo John
Siemens Aktiengesellschaft
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