uvital rj11 duplex wall jack adapter dual phone line splitter wall jack plug 1 to 2 modular converter adapter for office home adsl dsl fax model cordless phone system, white(2 packs) uvital <p>the uvital duplex wall jack adapter in white is designed for converting one modular jack into two. the four-conductor piece accepts line cords from any two devices such as phones, answering machines, fax machines, modems, caller ids and more. this duplex adapter can be plugged into any modular jack. </p> <b>uvital duplex wall jack adapter:</b><br> 4-conductor duplex in-wall adapter<br> plugs into any modular jack<br> accepts line cords from any 2 devices<br> for use with phones, answering machines, fax machines, modems, caller id, etc.<br> color: white<br> phone adapter converts 1 modular jack into 2<br>