Compuprint 4247-L03 - Manual (Page 36)

Indicators
ON LINE
Lit when the printer can receive and print data (printer online).
Blinks when there is data in the buffer and the printer is offline.
Unlit when the printer is disabled and the buffer does not
contain any data, or during the initialization, setup or tests.
PROGRAM
Blinks when one of the printer setup procedures has been
selected: Program Configuration or Power-On Configuration.
ALTERNATE
Lit when the alternate function of the keys has been enabled
pressing the ALTERNATE key.
FRONT 1
Lit when the Front1 paper path is selected.
FRONT 2
Lit when the Front2 paper path is selected.
24 User's Guide