... 6) For telephone interconnectContact Detail: CHENGYI ELECTRONICS CO.,LTD Http://czchengyi.en.alibaba.com Mobile No.:0086-13715732050 Tel ... transformer may be designed to customers requirementsPacking DetailVarious types of transformers available, PQ, CI, UI, EFD, EP, ER, EPC, ... transformer EPC series transformer EE series transformer The introduction of transformers of our main product: EC, EE. EI and ...