Black Box LPB2910A, User Manual

Page: 153 / 367

Publication date: Sept, 2015
Revision A1
141
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 is 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 a backup power supply, only the
primary power supply settings will be shown. If the primary power source fails, the backup power
source will take over. To determine the amount of power the PD may use, you must define the
amount of power that the primary and backup power sources can deliver.
Valid values are in the range 0 to 2000 Watts.

Port:
This is the logical port number for this row.
Ports that are not PoE-­‐capable are grayed out and impossible to configure PoE for.
 PoE Mode:
The PoE Mode represents the PoE operating mode for the port.
Disabled : PoE disabled for the port.
PoE : Enables PoE IEEE 802.3af (Class 4 PDs limited to 15.4 W).
PoE+ : Enables PoE+ IEEE 802.3at (Class 4 PDs limited to 30 W).

Priority:
The Priority represents the ports priority. There are three levels of power priority named Low, High,
and Critical.
The priority is used in the case where the remote devices requires more power than the power
supply can deliver. In this case, the ports with the lowest priority will turn off starting with the port
with the highest port number.

Maximum Power:
The Maximum Power value contains a numerical value that indicates the maximum power in watts
that can be delivered to a remote device.
The maximum allowed value is 30 W.