Expand Listen-in partitions
Listen-in coverage can be expanded by connecting several Microphone-Speaker boards to the Voice board. This
is especially useful for large premises, or in places where there is risk of sound muffling caused by walls or ma-
chinery, etc.
+
Microphone-Speaker boards must be installed near the point of intended use.
The supplementary boards must be connected in parallel to the Voice board, as per figure 39. The number of sup-
plementary boards, and the connection lengths can affect sound quality, therefore:
----
do not
connect more than 4 Microphone-Speakers to the Voice board.
----
do not
use more than 50 metres of cable between each Microphone-Speaker board and the Voice board.
+
When recording messages----use the Microphone board that is nearest to the Voice board, and temporarily discon-
nect the other boards.
All Microphone-Speaker boards will be interconnected during Teleassistance mode----allowing several users to
communicate.
SP–
SP–
M
ic
ro
p
h
o
n
e
b
o
a
rd
V
o
ic
e
b
o
a
rd
SP+
SP+
MIC
MIC
E
87
88
91
93
92
86
94
89
90
Figure 38
Parts identification and installation of the OmniaVOX kit
66
Expandable Multifunction Control Panel
Academy40
