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. Hearing aid-compatible phone does include Call Waiting/Caller ID, 99-name/number log, base speakerphone, 16 programmable one-touch speed dials, easy-to-read backlit LCD, intercom, two-line conferencing, headset jack, digital volume control and do not disturb/privacy setting.