Vivotek AW-GEV-264A Series, Руководство пользователя

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User Manual rev. 1.2. Aug. 2015
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Figure 3-11.1: The PoE Configuration
Parameter description:
Power Supply Configuration

Reserved Power determined by :
There are three modes for configuring how the ports/PDs may reserve power.
1. Allocated mode: In this mode the user allocates the amount of power that each port may
reserve. The allocated/reserved power for each port/PD is specified in the Maximum Power
fields.
2. Class mode: In this mode each port automatically determines how much power to
reserve according to the class the connected PD belongs to, and reserves the power
accordingly. Four different port classes exist and one for 4, 7, 15.4 or 30 Watts. In this mode
the Maximum Power fields have no effect.
3. LLDP-MED mode: This mode is similar to the Class mode expect that each port
determine the amount power it reserves by exchanging PoE information using the LLDP
protocol and reserves power accordingly. If no LLDP information is available for a port, the
port will reserve power using the class modeIn this mode the Maximum Power fields have
no effect For all modes: If a port uses more power than the reserved power for the port, the
port is shut down.

Power Management Mode :
There are 2 modes for configuring when to shut down the ports:
1. Actual Consumption: In this mode the ports are shut down when the actual power
consumption for all ports exceeds the amount of power that the power supply can deliver or
if the actual power consumption for a given port exceeds the reserved power for that port.
The ports are shut down according to the ports priority. If two ports have the same priority
the port with the highest port number is shut down.
2. Reserved Power: In this mode the ports are shut down when total reserved powered
exceeds the amount of power that the power supply can deliver. In this mode the port power
is not turned on if the PD requests more power than available from the power supply.

Primary and Backup Power Source :
Some switches support having two PoE power supplies. One is used as primary power
source, and one as backup power source. If the switch doesn't support backup power
supply only the primary power supply settings will be shown. In case that the primary power
source fails the backup power source will take over. For being able to determine the amount