The Aastra Dialog 4222 is the second model up in the Dialog 4000 range of digital telephones.
The Aastra Dialog 4222 Office telephone also has a LCD screen that shows the incoming callers number, as well as the clock and calendar. It also has a full handsfree speaker as well so you can talk to the other party without having to lift up the receiver.
All information is provided for reference only. If you are unsure about any of the features listed, please check the manufacturer's official information.