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:
Feb. 17, 2009
Filed:
Nov. 26, 2004
Holger Fehrmann, Magdeburg, DE;
Friedhelm Geiger, Spring Hose, PA (US);
Gerhard Hammer, Neupotz, DE;
Klaus Röther, Stutensee, DE;
Holger Fehrmann, Magdeburg, DE;
Friedhelm Geiger, Spring Hose, PA (US);
Gerhard Hammer, Neupotz, DE;
Klaus Röther, Stutensee, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
The invention relates to a network, in particular a PA PROFIBUS network having redundant properties and a linear topology. Two line ends are connected to a redundancy manager which disconnects said line ends in error-free conditions and connects them in error conditions. Said redundancy manager supplies voltage to the first line end for operating customers' mobile telephones each of which is connected to the network by a branching unit. After receiving a supply voltage on one connection thereof, said branching units check the state of a cable which is connected to the other network connection and transmit the supply voltage in the faultless condition thereof only. When the redundancy manager does not detect the supply voltage on the other end of the line end at least during a predetermined space of time after voltage supply, said redundancy manager supplies the voltage thereto. A cable having a disturbance is then disconnected from the line by the adjacent branching units.