Operation
169
Ope
rat
io
n
Operation with the keys
1)
Best voice quality at a distance of an arm's length.
2)
Optionally with switching device 1 4981, e. g. switch light.
3)
Only
must be pressed while a conversation is in progress.
4)
Only with switch-on rights.
Function
Activity
Result
Special function
Trigger call signal
(ring)
RiTTO
Call tone
sounds
and
flashes
Operate door
opener
press.
Door opener
switches
Establish
voice connection
1)
press.
Voice
connection
established
illuminates
RiTTO
2
Cancel voice
connection
press.
RiTTO
2
Voice connection
cancelled
Switch on/off
call signal
(call switch-off)
press briefly
illuminates
press briefly
Call tone
sounds
2) 3)
Switch additional
function (e.g.
staircase light)
+
press and
hold
press.
Switching device
switches
R i T T O
2
RiTTO
RiTTO
Switch on video
image manually
4)
press
any
control key
Video image switched
on
press
any
control key
Video image switched
off
press.
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