AT&T MERLIN LEGEND Release 2.0 MLX Direct-Line Consoles Operator's Manual page 92

Features
To Program Extension Status Buttons
1. Label the buttons to be programmed as
ES1
ES2
NOTE:
The labels suggested refer to the Extension Status
feature used by businesses with housekeeping or
health care services.
2. Press Menu.
3. Select Ext Program [Prog] .
If this feature is not displayed, press More.
4. Select Start.
5. Press the button to be programmed.
4-24
Extension Status
ES Off
ES Off means that the light next to that
extension is off. (Room is occupied and
telephone is in regular call-handling status. )
ES1 means that the light next to that extension
is flashing. (Room is unoccupied and ready for
cleaning; outside calls cannot be made from the
telephone.)
ES2 means that the light next to that extension
is on. (Room is vacant and outside calls cannot
be made from the telephone. )