NEC SL1100 Features And Specifications Manual page 342

SL1100
Setting Up
H
Operation
Check-in Options
To set a room as checked in:
Set a room as checked in as the guest registers at the front desk.
1. Lift the handset.
2. Dial 638.
3. Dial the extension number of the room you want to check in.
You hear confirmation tone.
4. Hang up.
In the STATUS mode, the DSS Console key for the room is on.
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ISSUE 2.0
Hotel/Motel - Room Status