16 port fiber patch panel is usually 1U rack mounted type with 16 ports or 24 ports with 8 ports covered,which is a customized fiber patch panel.
Further more there are some different 16 ports fiber optic splitter distribution boxes for 1:16 PLC fiber optic splitter cablings. this kind of fiber distribution boxes as you can see in the below make fast connector type drop cable extremely easy in wall mounted or pole application in indoor or outdoor use.
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