Dell PowerConnect 7048P User Manual - Page 276

Table 11-4. PoE Plus Key Features (7024P and 7048P Only) Feature Description Per-Port Power Limit Configurable power limit for each PoE-Plus port. Power Management Modes Supports two power-management modes: • Static-Allows you to reserve a guaranteed amount of power for a PoE port. This is useful for powering up devices which draw variable amount of power and provide them an assured power range to operate within. • Dynamic-Power is not reserved for a given port at any point of time. The power available with the PoE switch is calculated by subtracting the instantaneous power drawn by all the ports from the maximum available power. Thus more ports can be powered at the same time. This feature is useful to efficiently power up more number of devices when the available power with the PoE switch is limited Power Detection Mode Allows you to set the mode to legacy or 4-point 802.3AF detection. Enabling an additional high-power setting will allow the detection of 802.1at devices. Powered Device (PD) Disconnection Detection Mode Configurable setting to set the method that determines when a PD has disconnected from a port: • AC Disconnect-Assumes that when a valid PD is connected to a port, the AC impedance measured on its terminals is significantly lower than in the case of an open port (disconnected PD) • DC Disconnect-Measures current consumption to determine when a PD stops consuming current. 276 Managing General System Settings