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Systems connect several drop components with cable on the side of the subscriber’s home. The standard collection of units is a ground block or surge suppressor, a splitter or directional coupler followed by a high pass filter or a window filter. These units are interconnected with coaxial cables. The DIU replaces these collections of individual components with a single unit. 
Set top boxes Modems Subscriber Electronics Drop amps Drop passives
Any  drop, used in place of ground block. 
High speed solid state surge protection, for reliability and durability  Digital splitter  Directional coupler  High-Pass filter or window filter Over 50 configurations
DLPS-DIU-15D  Digital Interface Unit