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PoE Capabilities
8 Power Over Ethernet
Power Over Ethernet (PoE) functionality is supported on certain HPE OfficeConnect 1920S switch
models, enabling designated switch ports to provide power to connected devices. The devices receiv-
ing power through PoE are referred to as powered devices (PDs).
The switch automatically detects the presence of a PD on a PoE-enabled port, and the switch can
learn power requirements from LLDP messages from the PD. Power allocation can also be configured
statically per port.
The PoE software supports sharing the available power among the PoE-enabled ports. Ports are
assigned one of three configurable PoE priority values (High, Low, and None). When more power is
requested than is available on the switch, the switch provides power to a high priority ports before
lower priority ports.
Power allocation can be scheduled so that power is supplied only during periods when the PD is actu-
ally in use.
PoE Capabilities
The HPE OfficeConnect 1920S PoE-enabled switches support the original PoE specification (IEEE
802.3af) and the PoE Plus specification (IEEE 802.1at). IEEE 802.3af, enables providing up to 15.4W
of power over a PoE port, whereas PoE Plus enables providing up to 30W of power.
Table 51 shows which ports on each switch support PoE and PoE Plus, along with the maximum
power the switch can provide to all PoE ports combined.
Table 51. PoE Ports and Power Capabilities
The maximum power that the switch can provide is configurable on a per-port basis.
NOTE:
The information in this chapter is valid only for the HPE OfficeConnect 1920S switches that support
PoE. The switches that do not have PoE ports do not include the web pages this chapter describes.
Switch
Ports that Support PoE
Ports that Support PoE
Plus
Maximum Power Available
to All Ports
8-Port PoE Plus
Ports 1–4
Any 2 of Ports 1–4
65W
24-Port PoE Plus
Ports 1–12
Any 6 of Ports 1–12
185W
24-Port PoE Plus
Ports 1–24
Any 12 of Ports 1–24
370W
48-Port PoE Plus
Ports 1–24
Any 12 of Ports 1–24
370W
