Allied Telesis AT-S88 - Manual (Page 47)

AT-S88 Management Software User’s Guide
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9. In the Power Usage field, enter a number representing the percentage
of the total power budget of the switch that you want to allocate in total
for all the PoE ports (not for each individual PoE port).
Go on to “Allocating Power to the PoE Ports,” next, to perform the
power allocation for each port.