8-line corded business phone is a part of the RCA fully plug-and-play 8 Line x 25 Station Digital Business Phone System. Phone does not require complex programming or web-based configurations to network with other phones. Simply plug into RCA Router/Gateway, another part of the Digital Business Phone System. The router (sold separately) automatically configures the phone base station as it is added to the network. Business phone features a digital receptionist, built-in conference bridge, guided setup features, and music on hold. Expansion handsets are also sold separately.