Power Management - GE -DSH-73 User Manual

Chapter 5: Web-Based Management

Power Management

In a power over Ethernet system, operating power is applied from a power source
(PSU-power supply unit) over the LAN infrastructure to powered devices (PDs), which
are connected to ports. Under some conditions, the total output power required by
PDs can exceed the maximum available power provided by the PSU. The system may
a prior be planed with a PSU capable of supplying less power than the total potential
power consumption of all the PoE ports in the system. In order to maintain the
majority of ports active, power management is implemented.
The PSU input power consumption is monitored by measuring voltage and current.
The input power consumption is equal to the system's aggregated power
consumption. The power management concept allows all ports to be active and
activates additional ports, as long as the aggregated power of the system is lower
than the power level at which additional PDs cannot be connected. When this value is
exceeded, ports will be deactivated, according to user-defined priorities. The power
budget is managed according to the following user-definable parameters: maximum
available power, ports priority, maximum allowable power per port.
This section provides PoE (Power over Ethernet) Configuration and PoE output status
of PoE Switch as shown in Figure 5-74.
Figure 5-74: PoE power configuration interface and status
132 GE-DSH-73/DSH-82 and DSH-82-PoE User Manual