indeed from manager
Forward On Busy: Default = Off
When checked and a forward number is set, external calls are forwarded when the user's extension is busy. The number used is either the Forward Number set for Forward Unconditional or if set, the separate Forward Number set under Forward On Busy. Having Forward Unconditional active overrides Forward on Busy.
· If the user has Busy on Held selected, if forward on busy is active it is applied when the user is free to receive calls but already has a call on hold.
· If the user's phone has multiple call appearance buttons, the system will not treat them as busy until all the call appearance buttons are in use unless the last appearance button has been reserved for outgoing calls only.
APSS (SME)
ACSS (SME)
ACIS (UC)