ABB 2Line Manual page 23

CALLING THE CONCIERGE (INSTALLATIONS WITH CONCIERGE)
PIP... PIP...PIP
SYSTEM
ENGAGED
CALLING THE CONCIERGE
FUNCTIONS DISABLED
BUSY
TONES
PICK UP
THE HANDSET
PIIIIIIIIIIIIIP
SYSTEM
IS NOT
ENGAGED
CONTINUOUS
CALLING THE CONCIERGE
TONES
PIP... PIP...PIP
PIIIIIIIIIIIIIP
IF YOU HEAR IF YOU HEAR
CONFIRMATION TONES BUSY TONES OR
CONTINUOUS TONES
THE CALL
THE CALL COULD NOT
HAS BEEN MADE
BE MADE
21 | ABB