For AS systems (firmware >/= 9.0) and ES systems (from version 1.1). Movable and illuminated 4.3 inch color display, soft keys, slot for A-Modul 42 and BT-Modul 40 or En-Modul 42, integrated busy light, interface for corded or DHSG headsets, function key-related busy lamp field. Full CTI control via TAPI and AGFEO PC client. Suitable for S0 or UP0 interface, optional STE operation/support possible.