IP44 surface-mounted connection box with installation frame for 1x AMJ or UMJ module/coupling. With a data connection housing in protection class IP44, the established AMJ modules and couplings as well as SC Duplex couplings in the office environment can be effectively protected against the ingress of solid foreign bodies larger than 1 mm in diameter and against water splashing from all directions. With its compact dimensions of 75 x 86 x 58 mm, the IP44 connection box accommodates up to two data connections and is also impact-resistant. The gray housing can be equipped with one or two cable entries. A splash-proof transparent label field (21 x 59 mm) is provided for port identification. The completion of a ready-to-use connection is achieved by the tool-free snap-in of the corresponding AMJ modules and couplings into the 1- or 2-fold installation frames. The SC Duplex couplings can also be secured with screws in addition to snap-in mounting.