Specifications
D. 600 Ohm 4 Wire E & M Protocol Timing Specifications
1. “ON DEMAND”. Set DIP switches to protocol “A” (SW 5 and SW 6 - OFF).
GND screw terminal
or pin 6 on DVA-3003
Earth
GND
Contact from PABX
Pin 5
Start
250msec. min.
Idle/open
GND (+)
M Lead (START)
Open
Busy output
from DVA-3003
Pin 2
Idle/closed
In Use
250msec. max.
GND (+)
E Lead (BUSY)
Open
Announcement Duration
2. TYPE 5 E & M, WINK START. Set dip switches to protocol “B” (SW 5 - OFF, SW 6 - ON).
GND screw terminal
or pin 6 on DVA-3003
Earth
GND
Contact from PABX
Pin 5
Start (M)
Idle/open
GND (+)
M Lead (START)
Open
Busy output
from DVA-3003
Pin 2
Wink (E)
600ms
(Programmable)
GND (+)
E Lead (BUSY)
Open
Announcement
Idle/closed
B
O
M
*
E
O
M
*
B
O
M
*
4. SINGLE PLAY ON DEMAND. Set dip switches to protocol “C” (SW 5 - ON, SW 6 - OFF).
*NOTE: BOM = “Beginning Of Message” pulse. EOM = “End Of Message” pulse.
E. Using the DVA-3003 with Major PABX’S
3
GND screw terminal
or pin 6 on DVA-3003
Earth
GND
Contact from PABX
Pin 5
Start
Idle/open
GND (+)
M Lead (START)
Open
Busy output
from DVA-3003
Pin 2
Idle/closed
In Use
250msec. max.
GND (+)
E Lead (BUSY)
Open
Announcement
250msec.
min.
Announce
ment
Set Front Panel DIP Switches
to:
Manufacturer
* Earth ground is the positive of the PABX system talk battery
ATT (Dimension,
Horizon, etc.
4 Wire E & M)
Protocol A
with inverted busy signal
ON
OFF
5 6 7 8
ATT (System 75)
Protocol Dip
Switches
Notes:
E&M
E&M
Protocol A
with inverted busy signal
ON
OFF
5 6 7 8
Use 4 Wire E & M Interface. Connections: T & R to pins 3 & 4, M to pin 5, E to pin
2 and Earth Ground* to GND screw terminal.
Use 4 Wire E & M Interface and BUSY screw terminals. T & R to pins 3 & 4, SZ
to pin 5, SZ1 to GND screw terminal, and S and S1 to BUSY screw terminals.
GND screw terminal
or pin 6 on DVA-3003
Earth
GND
Pin 5
Start
GND (+)
M Lead (START)
(Connected to
earth GND)
Busy output
from DVA-3003
600ms
(Programmable)
GND (+)
E Lead (BUSY)
Open
Announcement B
O
M
*
B
O
M
*
3. DRUM RECORDER REPLACEMENT. Set dip switches to protocol “A” (SW 5 and SW 6 - OFF).
Announcement B
O
M
*
Pin 2