AUTOMATIC CLASSIFICATION CHANGE IN POWER OVER ETHERNET DEVICE

摘要

In one implementation, a classification resistance of a powered device is adjusted passively. The powered device is configured to receive a classification voltage from a network device and, in response, is configured to send a first current indicative of a first classification resistor to the network device. The first current and first classification resistor indicate a power requirement when no accessories are connected to the powered device. When at least one accessory is connected to the powered device, the powered device is configured to send a second current indicative of a second classification resistor to the network device. The second classification resistor is isolated from other circuitry of the at least one accessory. The second classification resistor may be located in the powered device, the accessory, or a connector coupled to the powered device and the accessory.

主权项

1. A method comprising:
receiving, at a powered device, a classification voltage from a network device; sending a first current indicative of a first classification resistance to the network device when no accessories are connected to the powered device; and sending a second current indicative of a second classification resistance to the network device when at least one accessory is connected to the powered device, wherein the first classification resistance is not responsive to a second classification resistor and the second classification resistance is responsive to the second classification resistor, the second classification resistor being isolated from circuitry of the at least one accessory.