AASTRA 4425 IP Vision (SIP) for MX-ONE User Guide - Manual (Page 79)

Group Features
Dialog 4425 IP Vision 80
Group Features
Group Call-pick-up
People working in a team can have their phones programmed by
their system administrator to form Call-pick-up groups.
In a Call-pick-up group, any member can answer any individual call
to group members. *8#
Dial.
Call Press to answer.
Notes:
One Call-pick-up group can serve as an alternative to
another group. Calls to the alternative group can only be
answered when there are no calls to your own group.
Finland and Sweden, press
* 0 #
.