DECT 6.0 8-Line Cordless Handset is a part of the RCA fully plug-and-play 8 Line x 25 Station Digital Business Phone System. Simply connect to the system's 8-line Corded Business Phone (sold separately) that is plugged 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. Handset allows you to answer or initiate calls on any or all of the eight lines. Handset offers easy-to-navigate, soft key interface. Calls to your extension are automatically routed to the cordless unit.