ABB 2Line Manual page 44

CALLING THE CONCIERGE (Installations with concierge)
If the handset is picked up and a continuous tone is heard then the line is free. Press the lock
release button (3) to call the concierge. With busy tones, the line is engaged and the call to
concierge is disabled.
PIP... PIP...PIP
=Functions disabled
PIIIIIIIIIP
3
The call The call could
has been made not be made
CONFIRMATION
PIP... PIP...PIP
TONES
PIIIIIIIIIP
42 | ABB