Panasonic KX-TG1840NZ - Manual (Page 45)

Answering System Features
45
2 Select “Answer System”, then press
{>}.
3 Select “Settings”, then press {>}.
4 Select “New Msg. Alert”, then press
{>}.
5 Select “On” or “Off”, then press {>}.
6 Press {ih}.
Note:
L If the base unit is in night mode, the base
unit will not beep when new messages are
recorded.