US 7,613,933 B1 · Inline power control

Abstract

A physical layer for an inline power device of a network power system. The network power system includes inline power devices such as power source equipment and a plurality of powered devices and further includes a plurality of corresponding transmission media. The plurality of transmission media are connected to the corresponding power source equipment and powered devices through a power interface at each end of the transmission media. The multiple power interfaces of the power source equipment are often referred to as ports. For each port of the power source equipment and the plurality of powered devices, there exists a physical layer. The physical layer includes an inline power control signal source. The inline power control signal designates when to apply power to a port when there is no power applied to the port and when to remove power from the port when there is power applied to the port.

Claims20

Dependent claims

A power source equipment of a network power system, the power source equipment comprising:

at least one physical layer including:
an inline power control signal source originating from the physical layer, wherein the inline power control signal is configured to indicate when to apply power to a port when there is no power applied to the port and when to remove power from the port when there is power applied to the port;
and
signal processing of the inline power control signal, wherein the signal processing is external to the at least one physical layer.

1 more element

Dependencies are inferred from the claim text.

Inline power control

Life of this patent

Inline power control

Life of this patent

Abstract

Claims20