DIN EN 50411-3-6-2014 光纖通信系統用纖維形成體和閉路. 產品規范. 第3-6部分:室外保護環境中使用的多模機械纖維連接件 (U類); 德文版本EN 50411-3-6-2013
Fibre organisers and closures to be used in optical fibre communication systems - Product specifications - Part 3-6: Multimode mechanical fibre splice for use in an outdoor protected environment (Cat U); German version EN 50411-3-6:2013