4
30
15
16
1
24
9
25
27 26
12
10
11
19
4
20
22
23
21
8
7
6
5
16
18 17
3
2
1
SI
NG
LE
T
O
N
E
W
ARB
LE
TONE
TI
P OU
T
2
-24
OU
T
TI
P IN
PU
T
1
CT
R
L GN
D
I
N
-24
OU
T
TI
P IN
PU
T
2
R
IN
G
I
N
PU
T 1
13
28
GR
OU
N
D
OU
T
14
-2
4 O
U
T
P
UT
15
29
30
TI
P OU
T
1
TI
P IN
PU
T
3
R
IN
G
I
N
PU
T 2
CT
RL GND
O
U
T
R
IN
G
I
N
PU
T 3
G
R
OUN
D
OUT
RING
OU
T 1
G
R
OUN
D
OUT
RING
OU
T 2
W
A
R
B
LE TO
NE
SI
NGL
E T
ONE
GROUN
D IN
-2
4 VDC I
N
Connecting Arrangements
There are two possible ways this equipment may
be used as described in the following paragraphs.
Place a check by the arrangement being used in
this
installation.
___ 1.
Arrangement 1:
Access Method
: Electronic Key or PABX
page port with "page enable" dry relay
contact.
Override Access
: Electronic Key C. O.
button or PABX loop start trunk.
Music
: Input background music to V-
9937.
Additional Features
: Pop suppression
and AGC on page and override. Two
outputs, one with music and one without.
Tone signaling option.
___ 2.
Arrangement 2:
Access Method
: Electronic Key or PABX
page port (no control leads required).
Override Access
: Electronic Key C .O.
button or PABX loop start trunk.
Music
: Background music may be
provided if the telephone system provides
the needed inputs and switching.
Additional Features:
Pop suppression
and AGC on override only. Tone signaling
option
.
FIGURE 3
LOCATION AND NUMBERING OF CONNECTION BLOCK
FIGURE 4
CONNECTING BLOCK POINTS
Wiring (Arrangements 1 and 2)
Refer to Figure 2 for location and numbering of
connection block and Figure 3 for connecting
block pin outs.
___ 1. Unplug power supply.
___ 2. Connect -24VDC "B" battery (may be
referred to as "-" or "signal battery") from
power supply
to pin 30 on V-9937.
___ 3. Connect 24VDC Ground ("B" ground, "+"
or "signal ground") from power supply to
pin 29.
___ 4. Connect 24VDC Ground from power
supply to telephone system Ground.
___ 5. Power test:
(a) Plug in power supply.
(b) If power reversal LED is lit:
(1) Unplug power supply;
(2) Reverse connections on pins 29
and 30;
(3) Go to step 6.
___ 6. Unplug power supply.
NOTE: Power supply pins 6, 21, 8 and 23 for
external speaker power are provided as a
convenience. When using large numbers of
speakers with the V-9937, the speakers should
be connected directly to their respective power
source.
Wiring Arrangement 1
Page Access:
___ a. Connect V-9937 pin 2 to page port Tip.
___ b. Connect pin 17 to page port Ring.
Override Access:
___ a. Connect V-9937 pin 1 to override trunk (or
override line key) Tip.
___ b. Connect pin 16 to override Ring.
Control Leads:
___ a. Connect V-9937 pin 3 to one side of page
port dry contact closure.
___ b. Connect pin 18 to the other side of the dry
contact closure.
Music Input:
___ a. Connect pin 4 of the V-9937 to one side of
the music source output.
___ b. Connect pin 19 to the other side of the
music output.
NOTE
: Use a low level music source such as a
tuner. DO NOT connect the output of a high
power amplifier to the Valcom unit.
