Jansum Electronics(Dongguan) Co., Ltd. is located in Changping Town, Dongguan City. We are a company specializing in R&D, manufacturing and sales of Ethernet transformer, Telecom transformer, Choke coils, Inductors and other magnetic components. The products sell well at home and abroad, and are exported to Europe, America, Southeast Asia, Middle East, Australia and other markets, and provide OEM/ODM services for domestic and foreign customers. Jansum has such a full range of products categories, stable performance, and cost-effective, that Jansum has received consistent praise from customers. Jansum's products are widely used in network switches, routers, ADSL, optic modem, set-top boxes, TV, monitoring equipment, network players, smart home and other industries.