Bellcall Digital Door Entry System
PD-083 Issue 3A
Installation and Operating Manual
Page 40 of 46
Diagram J – BSC4-AD
The BSC4-AD can be used for two different purposes. As an audio distributor it allows the
phone wiring to be broken up into smaller more manageable isolated segments with less
risk of data corruption. As a pure isolator it can isolate phone wiring on an individual flat
level at 4 flats per BSC4.
2
2
2
2
2
2
1
1
1
1
1
1
B
B
B
B
B
B
A
A
A
A
A
A
-
-
-
-
-
-
-
-
-
-
-
-
-
+
+
V
id
e
o
V
id
e
o
V
id
e
o
V
id
e
o
V
id
e
o
V
id
e
o
C
o
m
m
n
12V
12V
A
u
d
io
A
u
d
io
A
u
d
io
A
u
d
io
A
u
d
io
A
u
d
io
D
a
ta
D
a
ta
D
a
ta
D
a
ta
D
a
ta
1
2
V
1
2
V
1
2
V
1
2
V
D
a
ta
C
o
m
m
n
+
+
+
+
+
+
+
+
+
+
-
-
-
Power
Supply
Input
Input
Power 1
Power 2
Power 3
Power 4
Input
Output
Output
Output
Status
Test
Test
Phone 1
Phone 1
Phone 2
Phone 3
Phone 4
Test
Phone 2
Test
Phone 3
Test
Phone 4
SW7
Off-On
SW6
Audio on
Select 1
Select 2
Select 3
Select 4
OFF
ON
Video
Termination
4 3 2 1 0
Video
Gain
Label BSC4-AD
Version No
Build No
1
Prog
