Netgear GSM4248P User Manual - Page 137

AV Line of Fully Managed Switches M4250 Series Main User Manual Table 37. PoE port capacities and budgets (Continued) Model PoE ports Port Capacity Switch PoE Budget M4250-40G8XF-PoE+ 8 PoE+ (802.3at) 30W 960W M4250-40G8XF-PoE++ 8 PoE++ (802.3bt) 90W 2880W with three internal PSUs connected 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 Device Compatible PoE Class Standard 0 PoE, PoE+, and PoE++ 1 PoE, PoE+, and PoE++ 2 PoE, PoE+, and PoE++ 3 PoE, PoE+, and PoE++ 4 PoE+ and PoE++ 5 PoE++ 6 PoE++ Class Description Default power (full) Very low power Low power Mid power High power Ultra high power Ultra high power Maximum Power Reserved for the PD 15.4W 4.0W 7.0W 15.4W 30.0W 45.0W 60.0W Power Delivered to the PD 0.44W-15.8W 0.44W-3.84W 3.84W-7.2W 6.49W-15.9W 12.95W-30.8W 25.5W-47.0W 51.0W-64.4W Configure Switch System 137 Information Main User Manual