Professional system telephone with large TFT touch display, up to 105 function keys and scripted answering machine -. Large TFT color display with touch function and automatically up-and-dimming Backlight Automatically detect the connection type S0 or UP0 best acoustic properties phone book for 1,600 entries locally in the telephone Headset connection with GHSG support for wireless headset-Comfortable answering machine with ruftypabhängigen announcements (additional SD-/SDHC card required) - Power supply via system connection, no separate power supply needed USB port for CTI (TAPI) and Device Configuration menu language adjustable-Expandable with 3 button modules COMfortel Xtension300