Allied Telesis AT-S63 - Manual (Page 192)

Chapter 16: Power Over Ethernet
192 Section II: Advanced Operations
Power Budgeting
The AT-9424T/POE Switch has a maximum power budget of 380 watts.
The maximum possible load on the switch from the powered devices is
360W. The latter number assumes that all of the twenty four ports are
connected to powered devices that are drawing the maximum of 15.4 W
per port. Given that the power budget of the switch exceeds the highest
possible load, it should be possible to connect powered devices to all of
the ports without exceeding the power budget. However, you can disable
PoE on a per-port basis or reduce the maximum amount of power a port
will deliver, from the maximum of 15.4 W. The default setting for PoE on
the switch is enabled on all ports.