a DSL filter is a device that filters interference between analog devices on traditional land line telephone systems and digital subscriber line (DSL) services. DSL filters prevent signals from analog [..]

a DSL filter is a device that filters interference between analog devices on traditional land line telephone systems and digital subscriber line (DSL) services. DSL filters prevent signals from analog equipment such as telephones from impeding performance or causing connectivity problems.

Filters out the noise caused by having DSL on your phone line. Without it, your alarm signals may not come through to our Alarm Operations Center. In a worst-case scenario, your system can be rendered unable to function locally or to communicate with our Alarm Operations Center. If you already have DSL and are not sure if you have a filter, call us [..]

A device used with DSL that allows the data and voice to travel over the same line simultaneously without interference, and also filters out impedance from telephone equipment. Usually required for each telephone device.