NETGEAR AV Line M4250 GSM4210PX 8-Port Gigabit PoE+ Compliant Managed AV Switch with SFP (220W) - Manual (Page 141)

• 802.3bt-Type3. The port supports the IEEE 802.3bt Type 3 mode, the IEEE 802.3at
mode, and the IEEE 802.3af mode.
• 802.3bt: The port is powered in the IEEE 802.3bt mode and is backward
compatible with IEEE 802.3at and IEEE 802.3af. In this mode, if the switch detects
that the attached PD requests more power than IEEE 802.3at but is not an IEEE
802.3bt device, the PD does not receive power from the switch.
10. From the Power Limit Type menu, select how the port controls the maximum power
that it can deliver:
• None: For PoE+ (802.3at) ports, the port draws up to Class 0 maximum power in
low power mode. In high power mode, the following applies:
• PoE+ (802.3at) ports: The port draws up to Class 4 maximum power.
• PoE++ (802.3bt) ports: The port draws up to Class 8 maximum power.
• Class: The port power limit is equal to the class of the attached PD. This is the
default setting. The upper limit is the power that a port can deliver to a PD. The
class is detected based on the PD that is attached to the port, and the following
applies:
• PoE+ (802.3at) ports: Possible values are from Class 0 to Class 4.
• PoE++ (802.3bt) ports: Possible values are from Class 0 to Class 8.
• User: The port power limit is equal to the value that is specified in the Power
Limit (W) field.
Note: If a PD does not report its class correctly, use of these options can preserve
additional PoE power by preventing the switch from delivering more power than
the PD requires. However, depending on which option you select, a PD that does
not report its class correctly might not power up at all.
11. In the Power Limit (W) field, enter the maximum power (in W) that the port can
deliver.
The following applies:
• PoE+ (802.3at) ports: The range is from 3.0W to 30.0W.
• 802.3bt-Type3 ports (which is a selection from the Power Mode menu): The
range is from 3.0W to 60.0W.
• PoE++ (802.3bt) ports: The range is from 3.0W to 99.9W.
12. From the Detection Type menu, select how the port detects the attached PD:
• IEEE 802: The port performs a 4-point resistive detection. This is the default
setting.
Main User Manual 141 Configure Switch System
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AV Line of Fully Managed Switches M4250 Series Main User Manual