This extension cord connects telephones, fax machines, answering machines or modems to a standard wall jack. It easily extends the reach from an outlet to your phone. Designed for superior signal transmission and maximum compatibility. Cable Type: Line/Extension Cord; Connector/Port/Interface: Two 6P4C Plug; For Device Type: Answering Machine; Fax Machine; Modem; Telephone; Connects Devices (From/To): Answering Machine; Fax Machine; Modem to Modular Phone Wall Outlet; Telephone.