You can clear or change your 'forward unconditional' settings through the Status menu.

1.Press the Status soft key if shown.
To access the Status menu during a call, press the key phone PHONE key and then press the Status soft key if shown.
2.Use the up arrow up and down down arrow arrow keys to highlight Fwd Uncon.
To switch off 'forward unconditional,' press the Off soft key.
To change the forwarding settings, press the Details soft key.
Use the up arrow up and down down arrow arrow keys to scroll through the editing options.
Use the left arrow left and right right arrow arrow keys to switch the forwarding on or off.
Use the left arrow left and right right arrow arrow keys to select which calls should be forwarded. The options are External Only, External and Group, Non Group Calls, and All Calls.
Select edit to change the number to which calls are forwarded.

Access Control

Your system administrator can configure whether you can access this menu option. See Menu Access Control.