Panasonic KX-TA624 - Manual (Page 191)

DSS Console Features 4-3
4.1 Configuration
Location of Controls
DSS Buttons with a Busy Lamp Field (BLF) (01 through 32):
These are used to access extensions. The BLF indicates the busy or idle status of each
extension in the system. These buttons can also be changed to other feature buttons.
PF (Programmable Feature) Buttons (01 through 16):
These buttons are provided with no default settings. With a paired telephone, you can
program the buttons as other feature buttons.
TO EMSS
Connects to the KX-TA624 System.