When an analogue pstn line carries vdsl broadband signals a vdsl broadband filter must be used this dsl filter separates the analogue telephone signal from the digital data signal so the alarm services are not disrupted due to distortion caused by the dsl data services the gf3012 adsl 2 vdsl microfilter is a tool less splitter that has been specifically designed for auto dialer alarm systems to implement the functionality of low pass filter in dsl over pots application contained within