NEC SL1000 Features And Specifications Manual page 577

ISSUE 2.0
2. Press Speaker key if 20-08-21 is enabled.
You hear dial tone on your Prime Line.
To answer a call on your Prime Line:
1. Lift the handset.
Depending on your Line Preference programming, you either answer the Prime Line or get dial tone
on the idle line appearance.
Features and Specifications Manual
SL1000/SL1100
P
1-567