Shenzhen Smart tech Co., Ltd. Is specialized in optical communication, transmission, data communication, CATV special test products, Our company is the agent of the JDSU  MTS - 6000 MTS - 4000 MTS - 2000 optical time domain reflectometer and other optical testing products in China , Japan's Sumitomo The TYPE- 81 c -TYPE - 100 – s TYPE-66  optical fiber splicer  Chinese l dealers, Welcome the customers to inquire cooperation...