4-port FTTH junction box, 80 x 80, wall or top-hat rail mounting The LogiLink surface-mount junction box for fiber-optic cables is ideal for subscriber connections in residential and commercial buildings and is the perfect solution for connecting to a high-speed fiber-optic network. This LogiLink fiber-optic subscriber connection terminates the fiber-optic cable in the home (FTTH) or office (FTTD).