DFL 6258G RS232 Data over Fiber optic 20 channel video multiplexer  is a miniaturized fiber transmission equipment of video, data and other service signals. It introduces advanced all-digital technique and was tailor-made for surveillance & control market. DFL 6258G RS232 Data over Fiber is able to transfer 16-channel unidirectional video,The hot swappable design makes the installation very easy and on-site adjustment unnecessary. All interfaces based on standard core circuits and optical modules are compliant with all international criteria.