Siemens HiPath 500 Operating Instructions Manual page 24

Making Calls – Basic Functions
Step by Step
Forwarding - trunk off
e
or
24
Deactivating call forwarding:
Select and confirm.
or
rjh
Enter the code.
Confirm the displayed call forwarding type.
or
f g
or Enter the activated call forwarding type.
o
Enter your DID number.