Check the listing for details. DSL Filter Adapter for PC Computer Phone Fax Modem Line. Condition: Used. Listed at 4.95 USD. The Cerepros DSL Filter Adapter is a universal adapter designed for connecting PCs, phones, faxes, and modems to a DSL line. It features a DSL/Phone (RJ-11) female connector for easy conversion. The adapter is compatible with various brands and provides a reliable connection for efficient data transmission. Perfect for those looking to connect multiple devices to their DSL line, this adapter offers convenience and versatility in one compact package.