AT&T MERLIN LEGEND Analog Direct-Line Console Operator's Manual page 81

Using Features
To Use Night Service
1. Press programmed Night Service button.
If you do not need a password, the green light next to the button goes on
to indicate Night Service is on and off to indicate Night Service is off. If a
password is required, the green light flashes.
2. Dial password, if required. See Note.
Note: You must complete the password within 60 seconds or
start the procedure again. If you make a mistake when
entering a password, the light next to the Night Service button
returns to its previous state.
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