China Ningbo Grand Telecommunication Equipment Co.,Ltd. have many experienced qualified manager and engineers for R&D, with more than 10 years experience in the telecommunication equipment industry, specializing in developing and manufacturing all kinds of telecommunication, network, and other related products, protector module. Our main products are keystones, patch panels, patch Cords, wiring block, network tools, faceplates, communication accessories, fiber Optic Accessories,distribution boxes & cabinet and so on. Our company is the OEM production base for many domestic and foreign famous companies, the products, protector modules, protection circuit module, cryptographic protection module, integrated protection module, surge protection module, lightning protection module, rust protection module, 5 pin protector module, xoops protector module, motor protection module, discharge protection module, corrosion protection module, line protection module, trusted protection module, overvoltage protection module, pico protector module, engine protection module, battery protection circuit module are guaranteed under the ISO 9001 quality management system. Our friendly and professional sales team will lead you through your order and confirm price and delivery. .