NETGEAR AV Line M4250 GSM4210PX 8-Port Gigabit PoE+ Compliant Managed AV Switch with SFP (220W) - Manual (Page 137)

Table 37. PoE port capacities and budgets (Continued)
Switch PoE Budget Port Capacity PoE ports Model
960W 30W 8 PoE+ (802.3at) M4250-40G8XF-PoE+
2880W with three
internal PSUs connected 90W 8 PoE++ (802.3bt) M4250-40G8XF-PoE++
Supplied power is prioritized according to the port order, up to the total power budget
of the device. Port 1 receives the highest PoE priority, while port 8 is relegated to the
lowest PoE priority.
If the power requirements for attached powered devices (PDs) exceed the total power
budget of the switch, the PoE power to the device on the highest-numbered active PoE
port is disabled to make sure that the devices connected to the higher-priority,
lower-numbered PoE ports are supported first.
Although a device might be listed as an 802.3bt PoE++-powered or 802.3at
PoE+-powered device, it might not require the maximum power limit that is specified
by its IEEE standard. Many devices require less power, allowing all 8 PoE ports to be
active simultaneously when the devices correctly report their PoE class to the switch.
The following table shows the standard power ranges, calculated with the maximum
cable length of 328 feet (100 meters). If a device receives insufficient PoE power from
the switch, consider using a shorter cable.
Table 38. PoE classes and PoE power allocations
Power Delivered to
the PD Maximum Power
Reserved for the PD Class Description Compatible PoE
Standard Device
Class
0.44W–15.8W 15.4W Default power (full) PoE, PoE+, and PoE++ 0
0.44W–3.84W 4.0W Very low power PoE, PoE+, and PoE++ 1
3.84W–7.2W 7.0W Low power PoE, PoE+, and PoE++ 2
6.49W–15.9W 15.4W Mid power PoE, PoE+, and PoE++ 3
12.95W–30.8W 30.0W High power PoE+ and PoE++ 4
25.5W–47.0W 45.0W Ultra high power PoE++ 5
51.0W–64.4W 60.0W Ultra high power PoE++ 6
Main User Manual 137 Configure Switch System
Information
AV Line of Fully Managed Switches M4250 Series Main User Manual