... or ONU complete a fixed cable, optical fiber buffer, fusion, ground protection and fiber optic distribution, composition, adjusting and other functions. ... proof, pest-proof and condensation-proof。2. Adopt integrated splice& distribution module, with 12 cores, 24 cores, 48 cores, 72 ... resistance voltage≥ 3000V (DC) / 1min without breakdown, no back-arc Optical Fiber Cable Distribution Frame (ODF )