NEC 28i System Manual page 10

Do Not Disturb
Do Not Disturb (DND) blocks a telephone's incoming calls and Paging
announcements. A guest can activate DND any time they need privacy
(for example, if they need to work uninterrupted). Once a guest activates
Do Not Disturb, they can still place calls and dial other hotel/motel ser-
vices from their room telephone. Callers to the DND extension hear error
tone or the voice prompt, "Please do not disturb" (if installed).
Supervisor's stations can remotely activate and cancel Do Not Disturb for
room telephones. If you allow room telephones to activate DND, you
should also allow supervisor stations to remotely activate and cancel.
Checking out a guest will also deactivate their phone's Do Not Disturb.
When first installed . . .
Do Not Disturb is disabled.
Using Do Not Disturb
To enable DND at a room telephone:
1. Lift handset.
2. Dial 127.
You hear confirmation tone after you dial the code.
3. Hang up.
The supervisor's station can still call the extension by using
the business mode feature Do Not Disturb Override.
To cancel DND at a room telephone phone:
1. Lift handset.
You hear stutter dial tone when you lift the handset.
2. Dial 128.
You hear confirmation tone.
3. Hang up.
2-2
When you
want privacy,
use Do Not
Disturb to
block your
incoming
calls.