Dahua DH-PFS4218-16GT2GF-240 Manual page 72

Step 2 Set PoE Off Time and PoE On Time.
Step 3 Select the Enable box and click Save.
3.2.11.3 Legacy Support
Enable Legacy Support in case of non-standard powered device.
Non-standard powered device means that the device supports 48V PoE power supply, but does
not conform to IEEE 802.3af/at.
Step 1 Select Advanced > Seldom-used > PoE > Legacy Support.
The Legacy Support interface is displayed.
Figure 3-73 Green PoE
Advanced Settings 66