The atl berkshire 200 is an entry level business telephone that comes complete with a ten year warranty the headset port fitted as standard is compatible with all major brands of headset and the modem port allows quick and convenient connection when sharing your telephone line with a computer two line cords arrive with each telephone for either the standard uk socket bs6312 or category 5 installations requiring rj45 connections and you can set the phone to indicate the presence of a voicemai