These converters convert 10100mbps 10base t 100base tx fast ethernet twisted pair signals to 100base fx fast ethernet fiber signals the media converters come with their own solid metal case housing led status indicators and ac to dc power adapters they can be used as stand alone converters or installed in a dmc 1000 chassis in case you install them in the chassis you will remove their metal cases and slide in their pc boards into the chassis slots the chassiss power supply will be use