Panasonic KX-T336 System Reference Manual page 1037

Description of Assigning Items
DN-(01 to 12)
Type Assigns the use of the DN buttons. The DN-01 button is fixed to PDN and cannot
be changed or deleted.
Number Assigns the number for each DN button which is preset to "PDN," "SDN," "PRV-
CO," "DSS (DN)," "DSS (ICM)," "Group CO" or "ONETOUCH"
SDN COS Assigns whether the COS of the SDN button is that of the extension (PDN-Primary
Directory Number) or the COS of the SDN (Secondary Directory Number)
extension.
Day Ring Assigns whether incoming calls have immediate or delayed ringing on PDN, SDN,
SCO or GCO buttons in Day mode. The ringing assignment of the first PDN can
also be changed with this option.
Night Ring Assign similarly as the above item except this applied in Night mode.
Conditions
This screen cannot be selected if "Extension-Station (1/3)", Telephone Type is set
to "SLT" or "OPX."
Some items cannot be programmed depending on the setting of "Extension-Station
(1/3)", Model. They are indicated by "—."
Assignable items are DN buttons of the programmed model. For example, if KX-
T30830 is programmed as the model, assignable items will be as follows:
<Example>
Automatic
setting
9-G-9
Programmable
items
Not program-
mable items