The location should be in a dry, ventilated, and anti-corrosion place, and the height should be no less than 1. (The specific height can be adjusted according to the actual situation, for example, the height of the bottom of the indoor installation should be 1. 5m. A fiber distribution box (FDB) is a passive enclosure that provides secure splicing, termination, and distribution of optical fibers. It typically contains splice trays, adapters, and cable routing components to manage fiber connections. FDBs are used to organize incoming and outgoing cables. Put wall-mounted boxes 4. This helps keep them working safely. Check and fix the box. ication and relevant standards over the range of optical wavelengths from 1260nm to 1625nm.