Specifications

Installation
A. 120V AC Operation
The DVA-3003 is provided with a 120VAC U.L. listed adaptor with a 12VDC 500mA output. The DVA-3003 requires a
24 hour unswitched 115VAC outlet. To protect the internal electronics, the installation of a surge protector is
recommended.
B. 48VDC Operation
Connect -48VDC and Earth Ground to the terminal block as shown below. Nominal current draw is less than 100mA.
If a power supply protection fuse is used in series with the -48V supply, a 500mA slow blow fuse is recommended.
The initial start up current can surge as high as 600-700mA.
BUSY
48V GND
POWER
PROGRAMMING
PORT
CHANNEL 1
600 OHM
E & M
CO/PABX
LINE
USE ONLY LISTED
CLASS 2 POWER
SOURCE 12VDC, 500mA
MAX
VIKING ELECTRONICS HUDSON WI. 54016
Earth GND
(+)
- 48VDC
Connect to “ringing”
C.O. line or PABX
ext. for remote
recording and
programming when
using “E & M”
interface. If “Ring
Trip” interface is
used, channel 1 or
the Programming
Port may be used.
ON
OFF
E & M
PROTOCOLS
Channel 1 ring trip
interface
Connect to “Ringing”
C.O. or PABX line.
Earth GND (+) 6
M Lead (Start) 5
Tip (600 ohm) 4
Channel 1 four wire E & M interface
1 - 48V
2 E Lead (Busy)
3 Ring (600 ohm)
A. Standard Ring Trip Interface (Two Wire)
Any ringing C.O./PABX line will be answered, given an announcement and released. The DVA-3003 is then
immediately ready to answer the next incoming call. Set the front panel DIP switches to RING TRIP for each channel
using “Ring Trip” Interface, then momentarily disconnect power. *
B. Continuous Play 4 Wire E & M Interface
Set the front panel DIP switches to E & M for each channel using E & M Interface. Set “E & M protocols” DIP
switches to “A” (DIP switches 5 and 6 off). Invert the START signal (DIP switch 7 on). *Momentarily disconnect the
power. The announcement will be repeated continuously on pins 3 and 4 (600 ohm output).
C. 600 Ohm 4 Wire E & M Protocols
ON
OFF
E & M
Protocols
5 6 7 8
PROTOCOL “A” OFF
PROTOCOL “B” OFF
PROTOCOL “C” ON
For future use ON
SW 5 SW 6
SW 7 Inverted START signal when “ON”
SW 8 Inverted BUSY signal when “ON”
First set the front panel DIP switches to E & M for each channel using E & M Interface, then momentarily disconnect
power.* Four different protocols are now switch selectable for changing E & M timing, plus the ability to invert the
START and/or BUSY signals.
2
5 6 7 8
or
Programming
ON
Channel
1 2 3
Single
Channel
E & M
Ring
Trip
* A momentary power down allows the DVA-3003 to read the new DIP switch settings.
Dry contact closure for “E &
M” busy signal or “A” Lead
control
for “ring trip”.
Front Panel DIP Switches
Rear Panel E $ M Protocols DIP Switches
120V AC
OFF
ON
OFF
ON