ABB 2Line Manual page 22

If the visitor calls your house and then another one, on picking up the handset a series of
busy tones will be heard. You won’t be able to communicate with the visitor.
2
Call made to flat 1 and
after to flat 2
AUTO SWITCH-ON SYSTEM
The auto switch-on system lets you communicate with the entrance panel without having to
first receive a call.
PICK UP
THE HANDSET
Note: Once the automatic switch-on has been activated, you can activate additional
elements by pressing the same button. Consult your installer.
(1) The values shown may vary depending on the installation. Consult your installer.
20 | ABB
1
PIP... PIP... PIP
SYSTEM
ENGAGED
BUSY
TONES
PIIIIIIIIIIIIP
SYSTEM
IS NOT
ENGAGED
CONTINUOUS
TONES
2 WIRE DOOR ENTRY SYSTEM
PIP... PIP...PIP
Flat 1
=Functions disabled
AUTO SWITCH-ON
SYSTEM DISABLED
AUTO SWITCH-ON
USER'S
MANUAL
Flat 2
Maximum time
for conversation:
60 seg (1).