AASTRA 4425 IP Vision for BusinessPhone User Guide - Manual (Page 52)

Call Forwarding
BusinessPhone – Dialog 4425 IP Vision 52
Cancel External Diversion
Absence Press (see display).
E
or
F
Press (see display).
Repeat until the External Follow-me menu is framed.
Select Press (see display).
Deactivate Press to deactivate (see display).
Re-activate External Diversion
Divert your calls to an external position. *22*#
Press to activate the programmed External Diversion.
You can make outgoing calls as usual. A special dial tone reminds
you that call forwarding is active. í
Press.