Building Entrance Terminals Modules Other These 16 AWG steel building entrance terminals feature an easy-to-install MS2 style connector for use in specialized OSP installations including ONU and FTTx cabinets and military command and control centers. Also included are multiple external and internal ground lugs as well as a splice chamber. UL approval standard on all terminals. Standard 5-pin protector modules, available in Analog and Digital versions, are sold separately.