Bellcall Digital Door Entry System
PD-083 Issue 3A
Installation and Operating Manual
Page 23 of 46
BSC4-AD Audio Isolator Settings
The BSC4-AD is an audio isolator which may have multiple audio phones (with individually
programmed addresses) connected to each output (not just extensions).
The BSC4-AD is also capable of individual flat isolation with just one flat per output and
can take care of the address decoding, SW6 settings as below and the phones do not
need programming.
All Video jumper settings are irrelevant for audio only systems, so ignore.
Switch settings
For Audio Distribution (multiple flats per output) SW6 is set to 0
SW6 is a rotary 16 position switch which sets the videophone addresses as per the
following table. These numbers represent actual flat numbers for the digital controllers,
they also correspond to the inputs on the BSD8 or BSD72.
SW6 Setting
Pos Phone 1 Phone 2 Phone 3 Phone 4
0
None
None
None
None
1
1
2
3
4
2
5
6
7
8
3
9
10
11
12
4
13
14
15
16
5
17
18
19
20
6
21
22
23
24
7
25
26
27
28
8
29
30
31
32
9
33
34
35
36
A
37
38
39
40
B
41
42
43
44
C
45
46
47
48
D
49
50
51
52
E
53
54
55
56
F
57
58
59
60
Address Offset SW7 – Builds up to 6C
SW7 is a 4 bit switch that is used to increase the addressing range. For each bit that is
switched ON add the corresponding value to the address set by SW6. This allows phone
1 flat addresses up to 240 to be set.
Bit Offset
1
+60
2
+120
3
+1
4
+2
Extended Addressing Jumper PROG pins 2-3 – Build 6C
This jumper adds +240 to the phone 1 address set using SW6 and SW7. Custom versions
will show the custom offset on the build label. The jumper is stored on pins 4-5.
SW6
0
1
2
3
4
5
6
78
9A
B
C
D
E
F
Shown at 0
SW7
(QW
ER)
OFF
↔ ON
Each bit on SW7 adds the
corresponding amount to
the address set by SW6.
ATTENTION
Each SW6 MUST be set correctly
for the phones to ring.
This switch is shipped set to 0 to
prevent multiple phones ringing on
initial installation.
