Compact, universal fiber optic connection unit for mounting on flush-mounted or hollow wall boxes, for surface-mounted or mounting rail mounting, for connecting pre-assembled installation cables with mini breakout cables or for installing pigtails, equipped with couplings with laser protection, unused cutouts closed with blind plugs, cable entry options: rear, top, bottom, left or right, with integrated clips for mounting rail mounting in two directions, pivoting removable splice cassette for up to 8 crimp splice protectors, cover can be removed without tools, plug direction 90°, color of the cover parts pure white RAL 9010, variants: equipped with SC APC, SC UPC, LC-D APC or LC-D UPC, E2000-S APC couplings