HP 2910AL - Manual (Page 254)

Power Over Ethernet (PoE+) Operation
Introduction to PoE+
PoE Terminology
Term Use in this Manual
active PoE port A PoE port connected to a PD requesting power.
DTE Data Terminal Equipment
MPS Maintenance Power Signature; the signal a PD sends to the switch to
indicate that the PD is connected and requires power.
Oversubscribed The state where there are more PDs requesting PoE power than can be
accommodated.
PD Powered Device. This is an IEEE 802.3at-compliant device that receives its
power through a direct connection to a Gig-T PoE port in a PoE device.
Examples of PDs include Voice-over-IP (VoIP) telephones, wireless access
points, and remote video cameras.
PoE Power-Over-Ethernet; the method by which PDs receive power (operates
according to the 802.3af standard). Some pre-standard PoE devices are
also supported; refer to the FAQs for your switch model.
PoE+ Power-over-Ethernet Plus; the method by which PDs receive power
according to the 802.3at standard. It is backward compatible with devices
using the 803.3af standard.
port-number
priority Refers to the type of power prioritization where, within a priority class, PoE
assigns the highest priority to the lowest-numbered port, the second-
highest priority to the second lowest-numbered port, and so on. Note that
power priority rules apply only if PoE provisioning becomes
oversubscribed.
priority class Refers to the type of power prioritization that uses Low (the default), High,
and Critical priority assignments to determine which groups of ports will
receive power. Note that power priority rules apply only if PoE provisioning
becomes oversubscribed.
PSE Power-Sourcing Equipment. The PSE can supply 15.4 watts of PoE power
to 24 PoE ports or 30 watts of power to 12 PoE+ ports.
11-4