... of EE, EF, ER, RM, EPC, EP, EFD Series Communication Network Transformers Key Specifications/Special Features:Description: Transformer types: EE, EF, ... main transformer, pulse transformer and inductorApplications: mainly used in communication product of high speed commutation transmission, such as modem, ... require the safe certification such as UL, CSA, BABT, VDE Communication Network Transformers