Panasonic KX-T336 System Reference Manual page 606

(Supplement)
The table below shows whether an extension which has DND assigned rings
or not and the other extensions which has the extension's directory number
assigned (PITS) rings or not and how their SDN indicators light, when the
extension setting DND receives a call.
Type of call arriving at
setting extension
Extension call
Attendant Console call
DIL (1:N) call
DIL (1:1) call
DID call
DISA call
Other calls
1 DND tone is sent to the caller.
Other extensions Extension which
has SDN assigned has DND assigned
or not (PDN)
No No ring
Yes No ring
No No ring
Yes No ring
No
No ring
Yes
Ring
No
No ring
Yes
No
No ring
Yes
No
No ring
Yes
No ring
5-B-7
(30393)
Extension which has
SDN assigned (SDN)
1
Red 240 wink
Ring
1
Red 240 wink
Ring
Lights on in red
No ring
Red 240 wink
Ring
Indicator off
No ring
Indicator off
No ring
1