This multi-featured model supports advanced system functions for professional office users. The Dialog 4223 Professional is ideal for administrative workers and traditional call center (ACD) agents. With its "landing gear struts" and a three-row, adjustable, graphical display, users can adjust the phone for all environments and lighting situations.

Using softkeys, users can easily access the display menu with a number of system features such as a phonebook, call list, diversion, absence reason, etc. Programmable keys enable fast access to specific numbers or services. A high quality, hands-free speaking function offering full duplex and Acoustic Echo Canceling (AEC) makes this phone well-suited for telephone meetings. A headset can be connected directly to the integrated headset port. Toggling between the handset and headset is controlled by a dedicated key. Additionally, up to four extra key panels and an optional unit for external equipment can be easily connected.