Connect phones, modems & fax machines to wall jacks. The modular jacks on each end are compatible with any brand. Extra length of cord allows you to reach devices that aren't near the wall jack. Easily installs into standard phone jacks without the need for tools. Cable Type: Line / Extension Cord; for Device Type: Fax Machines; Modems; Telephones; Connects Devices (From / To): Modem to Modular Phone Wall Outlet; Cable Length: 25 ft.