Bell Answering Machine DDA-EXT-1 Leaflet
Flats
Electrical Cupboard
Door Panel
Phone
Z
I
R
O
T
FailSecure
203, 204
Lock Release
DDA-EXT-1/VR(S)
Wiring for DDA Extended Halo Systems
Bell
System
-
+
340C
Power Supply
PD-176 Issue 1
T
O
-
R
+
H
C
Z
DDA
Interface
PCB
T
O
R
H
C
61
Speech
Unit
-
LOCK
+
Telephone Models:
801 801S 801PS
500D 500PD
801 801S 801PS
500D 500PD
(Telephones) Ltd
www.bellsystem.co.uk
These 2
Connections
must be
doubled up
Call
Button
Call
Button