Following camera models supported with this FW
NC110XB, NC305XB, NC317XB, NC312XC

If existing camera firmware version is V18.25.6.0_200904 or V18.25.6.0_200925 then upgrade to: 
Step 1 - V18.25.6.0_201119. Wait approx 3 minutes for FW to update
Then, upgrade to:
Step 2 - V18.25.6.0_210301, wait approx 3 minutes for FW to update
Then, upgrade to:
Step 3 - V18.25.7.1_211129, wait approx 3 minutes for FW to update

Once camera comes back online verify V18.25.7.1_211129 is now listed as the camera firmware version. 

Default camera via IP Camera maintain to ensure all updates date effect