EXCELSUS Dsl SecEXCELSUS Dsl Security Alarm Filter Model KA431-L04 Product Features and Technical Details Product Features EXCELSUS Dsl Security Alarm Filter Model KA431-L04 This Excelsus Z-A431PJ31X-A it's simple but effective plug-in DSL filter for use with alarm panels. It simply plugs in to the RJ31X-RJ38X jack and then the cable from the alarm plugs in to the filter. * Blocks and isolates DSL/HPN signals from alarm equipment * Reliable, uninterrupted DSL/HPN and alarm operation * Compatible with most major ADSL, HPN and alarm systems * Supports alarm panel line-seizure and cut-line protection features * Surge protection circuitry for protection from lightening surges and power crosses?urity Alarm Filter Model KA431-L04 ~ DSL ALARM SECURITY FILTER