AASTRA 4422 IP Office (SIP) for MX-ONE User Guide - Manual (Page 18)

Description
Dialog 4422 IP Office 18
Incoming call
When you receive an incoming call, the display shows the calling
party’s name (if available) and number. The name and number are
flashing. If the number for an external call is not available, the
display shows
External instead of the number.
Incoming
3345
A Andersson