NEC 28i System Manual page 38

Room Status
To set a room's status from another telephone:
The supervisor's station should be the only telephone with
this capability.
1. Lift the handset.
2. Dial 141.
3. Dial the extension number of the room you want to set.
4. Dial the room status code:
2 = Maid Required
3 = Maid in Room
You hear confirmation tone. Do not dial options other than 2
or 3.
5. Hang up.
In the STATUS mode, the DSS Console shows the room's
status: slow flash for Maid Required; fast flash for Maid in
Room.
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