Chapter 79 Networked AV Mode
XMG1930 Series User’s Guide
609
Priority When the total power requested by the PDs exceeds the total PoE power budget on the Switch,
you can set the PD priority to allow the Switch to provide power to ports with higher priority.
Select Critical to give the highest PD priority on the port.
Select High to set the Switch to assign the remaining power to the port after all critical priority
ports are served.
Select Low to set the Switch to assign the remaining power to the port after all critical and high
priority ports are served.
Power-Up Set how the Switch provides power to a connected PD at power-up.
802.3af – the Switch follows the IEEE 802.3af Power over Ethernet standard to supply power to the
connected PDs during power-up.
Legacy – the Switch can provide power to the connected PDs that require high inrush currents at
power-up. Inrush current is the maximum, instantaneous input current drawn by the PD when first
turned on.
Pre-802.3at – the Switch initially offers power on the port according to the IEEE 802.3af standard,
and then switches to support the IEEE 802.3at standard within 75 milliseconds after a PD is
connected to the port. Select this option if the Switch is performing 2-event Layer-1 classification
(PoE+ hardware classification) or the connected PD is NOT performing Layer 2 power
classification using Link Layer Discovery Protocol (LLDP).
802.3at – the Switch supports the IEEE 802.3at High Power over Ethernet standard and can supply
power of up to 30 W per Ethernet port. IEEE 802.3at is also known as PoE+ or PoE Plus. An IEEE
802.3at compatible device is referred to as Type 2. Power Class 4 (High Power) can only be used
by Type 2 devices. If the connected PD requires a Class 4 current when it is turned on, it will be
powered up in this mode.
Force-802.3at – the Switch provides PD Wide Range Detection (WRD) with power of up to 33 W on
the port without performing PoE classification. Select this if the connected PD does not comply
with any PoE standard.
Note: Wide Range Detection (WRD) is integrated into Force-802.3at mode. Your
previous WRD configuration will be retained if you upgrade firmware to ZyNOS
4.70(xxxx.1) (‘xxxx’ refers to the Switch’s model code) or later with WRD enabled.
If you now want to disable WRD, you need to use MAINTENANCE > Configuration
> Erase Running Configuration (in Standard mode) to reset the Switch to its
default settings. Note you will lose all current settings.
Pre-802.3bt – the Switch offers power on the port according to the IEEE 802.3bt standard. Select
this option if the connected PD was developed before the IEEE 802.3bt standard is implemented
but requires power between 33 W and 60 W. IEEE 802.3bt is also known as PoE++ or PoE Plus Plus.
802.3bt – the Switch supports the IEEE 802.3bt standard and can supply power of up to 60 W per
Ethernet port to the connected PDs at power-up.
Max Power
(mW)
Specify the maximum amount of power the PD could use from the Switch on this port. If you leave
this field blank, the Switch refers to the standard or default maximum power for each class.
Table 346 Port > PoE Setup > PoE Setup (continued)
LABEL DESCRIPTION
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