2Wire - LFT4-2 Dual Line - DSL Filter - 2wire two line filter

2Wire 2-Line Inline DSL Filters are for two line telephones or phoneline devices (such as fax machines, answering machines, and analog computer modems). The 2-line Inline filter installs easily between the phone jack and telephone device. Once the filter is installed, telephone devices will be completely isolated from the DSL frequency spectrum, resulting in clear phone service. Eliminate Interference Ensures optimized DSL connections and "total isolation" of analog noise, interference, and modem errors.