User Manual

24-Port and 48-Port Gigabit Ethernet PoE+ Smart Switches with 4 SFP Ports
Configure System Information User Manual94
Configure Power over Ethernet
You can configure the global Power over Ethernet (PoE) configuration settings and the PoE
settings for each port.
PoE concepts
The following table shows the PoE+ capacity for each model.
Table 20. PoE capacities
Model Maximum Power Budget
Across All Active PoE+ Ports
Maximum PoE Power
Per Individual Port
GS728TPv2 190W
30W PoE+ (IEEE 802.3at)
GS728TPPv2 380W
GS752TPv2. 380W
GS752TPP 760W
By default, supplied power is prioritized in ascending port order, up to the total power budget
of the device. If the power requirements for the attached devices exceed the total power
budget of the switch, the power to the device on the highest-numbered PoE+ port is disabled
to make sure that the devices connected to the higher-priority, lower-numbered PoE+ ports
are supported first.
It is important to note that although a device is listed as an 802.3at (PoE+) powered or
802.3af (PoE) powered device, it might not require the maximum power limit that is specified.
Many devices require less power
, allowing all PoE+ ports to be active simultaneously
, when
the devices correctly report their PoE class to the switch.
Device class power requirements
PoE and PoE+ use Ethernet cables to supply power to PoE-capable devices on the network,
such as WiFi access points, IP cameras, VoIP phones, and switches. The switch is compliant
with the IEEE 802.3at standard (PoE+) and backward compatible with the IEEE 802.3af
standard (PoE). The switch can pass power through to any powered device (PD) that
supports these standards. PoE and PoE+ let you power such devices without the need for a
separate power supply.
The switch supports a Plug-and-Play process by which it detects the type of device that is
connected to one of its PoE+ ports and whether that device needs power and how much so
that the switch can provide the correct power to the device.
During the Plug-and-Play process, the connected device can provide its Class response to
the switch in many ways, depending on how the vendor programmed the device.