Panasonic KX-TD500 System Reference Manual page 712

<Type 2>
This function field is available for canceling Call Forwarding, and setting/canceling
Do Not Disturb and Electronic Station Lock.
Type 2
<Type 3>
This function field is available for making Inter Office Call through the Extension
Management screen.
Type 3
F1
(LOOP & TRG)
F2
F3 F4
( )
( ) (
F6
(Select)
F7
(Memory)
F8
(Function Select)
F1
(LOOP & TRG)
F2
F3 F4
( )
( ) (
F7
(Call)
F8
(Function Select)
6-C-24
LOOP & TRG
Move the cursor to the extension to
F5
be set or reset.
) ( )
Select Setting/Canceling.
Storing the data.
Type 3
LOOP & TRG
Move the cursor to desired exten-
F5
sion for Inter Office Calling.
) ( )
Execute Inter Office Calling for the
selected extension.
Type 4
screen
screen