Communications: electrical – Systems – Selsyn type
Reexamination Certificate
2007-08-14
2007-08-14
Zimmerman, Brian (Department: 2612)
Communications: electrical
Systems
Selsyn type
C340S003900, C379S413000
Reexamination Certificate
active
10836923
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.
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Cafiero Luca
De Nicolo Maurilio
Edsall Thomas
Hang Soei-Shin
Nakamura Karl
Cisco Technology Inc.
Marger & Johnson & McCollom, P.C.
Yang Clara
Zimmerman Brian
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