AASTRA 4220 Lite for BusinessPhone User Guide EN - Manual (Page 70)

Group Features
BusinessPhone – Dialog 4220 Lite / Dialog 3210 70
*28*
Dial. *#
Press.
Answer calls
Answer Group Hunting calls in the normal way.
Log out
To log out from one hunt group: #28*
Dial.
z
Dial the hunt group code.
Please ask your system administrator for the configured number. #
Press.
To log out from all hunt groups: #28*
Dial. *#
Press.