The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 02, 1992
Filed:
Sep. 28, 1990
Klaus Panzer, Munich, DE;
Thomas Neuhaus, Munich, DE;
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Abstract
In a bidirectional light waveguide telecommunication system having a passive light waveguide bus network extending between a switching center and a plurality of subscriber locations, only the switching center is designed for a normal bidirectional wavelength division multiplex operation and is provided for this purpose with an electro-optical transmission element, an opto-electrical receiving element and an optical filter, whereas only a combined opto-electrical receiving/electro-optical transmitting module that respectively works only in the time separation mode and is designed for emitting light having a wavelength for reception by the opto-electrical receiving element of the switching center is provided in the subscriber locations. In this combined receiving/transmitting module, the transmitting diode can be used, in alternation, as a receiving diode; alternatively thereto, the combined receiving/transmitting module can be formed with a laser module provided with a laser diode transmitted and with a monitor photodiode which is used, in alternation, as a receiving diode.