Established in 1997, we are one private Hi-Tech enterprise, and specialized in researching and developing, manufacturing and marketing of Data Communications equipment and optoelectronic equipment. The main data Communications equipments include interface converter such as RS232 to RS485, RS232 to RS422, RS232 to RS232 Photoelectric Isolator, RS232 Long Transceiver ,RS232/RS422/RS485 Active Band-separated converters, RS232/RS422/RS485 Active Band-separated industrial-level converters, Active ...