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:
Oct. 26, 2010
Filed:
May. 30, 2007
Luca Cafiero, Palo Alto, CA (US);
Maurilio DE Nicolo, Saratoga, CA (US);
Thomas Edsall, Cupertino, CA (US);
Karl Nakamura, Palo Alto, CA (US);
Soei-shin Hang, Sunnyvale, CA (US);
Luca Cafiero, Palo Alto, CA (US);
Maurilio De Nicolo, Saratoga, CA (US);
Thomas Edsall, Cupertino, CA (US);
Karl Nakamura, Palo Alto, CA (US);
Soei-Shin Hang, Sunnyvale, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A network node determines the suitability of coupled devices for being remotely line powered before actually powering them. The node scan its ports to determine which ports are coupled to devices. The node then interrogates the coupled devices. A unique discovery tone or bit pattern is generated and sent to devices coupled to ports. The node then monitors the port for a return signal. If there is a return signal, it is compared to the transmitted discovery signal. The signal will be identical after allowing for line losses if the coupled device is suitable for remote line powering. If the comparison yields a match, the network node supplies remote line power to the device.