VSP-V-9936A
Issue 5
V-9936A
SIX LINE C. O. AUDIBLE RING UNIT
INTRODUCTION
The V -9936A is a Six Line C. O. Audible Ring Unit to
be used with Electronic key and PABX telephone
systems.
These instructions contain the specifications and
information necessary to install, operate and maintain
the Six Line C. O. Audible Ring Unit.
When installing the V -9936A, notify the local
telephone company with the following information:
• The telephone number of the lines to which the
V -9936A will be connected
• The FCC Registration number of the V -9936A,
which is BAF9I7-12995-RG -N
• The ringer equivalence number (REN): 0.7B
SPECIFICATIONS
Purpose
• Monitors up to six C. O. Lines or PABX station
numbers and gives a common audible tone signal
and a dry relay contact closure to indicate
incoming ring on any of the lines.
• V -9936A units may be multiplied to supervise
additional lines.
Applications
• Central office lines
• PABX station numbers
• Phone system night ring relay
Features
• Monitors six lines
• Units may be multiplied for additional lines
• Provides interrupted electronic warble tone
output for tone signaling
• Provides interrupted dry contact closure output
to activate loud bells
• Input for a night switch (On/Off switch)
• Built-in 66 type connection block
• May be connected to an existing paging system
• Drives up to 150 Valcom One-way Amplified
Speaker Assemblies
• Drives up to two 45 Ohm Talkback Speakers
• May be used with One-way or Talkback Paging
Systems
• May be used with 70 Volt Paging Systems
• Ring tone will override any page in progress
• Volume control
• Power reversal indicator
• Powered by -24VDC "B" battery
Capacity
• Each V -9936A will provide signaling for six C.O.
lines or extension numbers
• Up to four units may be multiplied for monitoring
of 24 lines
• May be connected to one zone of a paging
system
• The V -9936A will drive two 45 Ohm talkback
speakers or 150 one-way amplified speaker
assemblies
• The dry contact closure is rated at 1.0 Amp @
105VAC, or 2.0 Amps @ 24VDC.
1 947961
Dimensions/Weight
• 8.20" H x 4.55" W x 2.30" D
(20.83cm H x 11.56cm W x 5.84cm D)
• 1.5 lbs. (.68 kg)
Power Requirements
-21.5 to -26VDC "B" Battery, 200mA maximum
Environment
Temperature: 0 to +50 Degrees C
Humidity: 0 to 85% non-precipitating
• V -9936A C. O. Ring Units, 1 per 6 lines
• VP-624B -24VDC Power Supply (VP-4024C if
using more than (3) V -9936A's).
If a page is in progress when an incoming call is
detected, the ring signal from the V -9936A will
momentarily override the page.
C.O.1
C.O.2
TELEPHONE
SYSTEM
(Page Control Unit
may not be required)
DESIGN
C.O.6
PAGE
OUT
General
The Valcom V -9936A is designed to monitor up to six
C. O. lines or PABX station numbers and will provide
a common tone signal and contact closure whenever
any of the lines are ringing. The V -9936A may be
used with most telephone systems because it
connects directly to the lines and not to the phones.
The tone output may be connected to speakers used
only for ringing or to one zone of a paging system.
The dry contact closure may be used to activate loud
ringing bells, strobes or other external equipment.
Both outputs will provide interrupted signals
whenever any line is ringing.
A disable input is provided for connection of a night
switch. With no switch connected, the V -9936A will
signal any time a line rings in. With a switch
connected and providing a short across the disable
input, the uni t will be inactive.
Stand-Alone Ringing
The following components are required to provide
common audible ringing over dedicated bells or
speakers.
• V -9936A C. O. Ring Units, 1 per 6 lines
• Signaling Devices consisting of:
a. Two 45 Ohm talkback speakers or
b. Up to 150 one-way amplified speakers or
c. Loud bells, buzzers, strobes etc. as required
• Power Supply: The VP-624B will power a V -9936A
using talkback speakers for signaling. If one-way
speaker assemblies or other signaling devices are
used, additional power may be required.
Ringing Over Paging
Ringing may be connected to one zone of a Valcom
One-way or Talkback Paging System or to the INPUT
of a high powered amplifier. The following
components are required:
FIGURE 1 - TYPICAL INSTALLATION
INSTALLATION
The following sections contain step-by-step
instructions for wiring the V -9936A and associated
Valcom equipment. Each instruction is preceded by a
line; place a check on the appropriate line as the
instruction is completed. The instructions also
include tests along the way to verify connections
have been made correctly. If these steps are followed
exactly, installation should go smoothly and quickly.
If the results of a test do not correspond with what is
shown, DO NOT PROCEED UNTIL THE PROBLEM
HAS BEEN CORRECTED.
Set individual volume controls at approximately 1/2
volume for testing when installing the control unit
and any one-way amplified speaker assemblies.
Mounting
Remove the metal mounting plate from the rear of the
V -9936A enclosure. Using two #6 x 3/4" wood
screws, mount the plate in a vacant space on the
backboard with the telephone system common
equipment. Both mounting holes must be utilized to
insure secure mounting of the unit. See Figure A.
Open the V -9936A enclosure to access connections
and option switches. Slide the rear of the unit
(Contains the board) onto the mounting plate and
lock in place with screw provided. Make connections
and replace cover after all connections are
accomplished. Lock cover in place using the #6 x 1/2"
screw provided.
2
V-9936A
WARBLE
TONE
GENERATOR
FIGURE A
TO REMOVE COVER
LOOSEN SCREW,
THEN ACTIVATE LATCH
PLASTIC
COVER
WIREWAY OPENING
TO WALL PLATE AND
JUNCTION BOX
CIRCUIT BOARD
HOUSING ASSEMBLY
SNAP LATCH
BRACKET
LOCKING
SCREW
WIRE TIE LOOP
WIRE TIE USED TO BUNDLE WIRES
ENTERING AND LEAVING TERMINAL AREA
METAL WALL
MOUNTING
PLATE
.155 DIA. HOLES FOR MOUNTING TO
SINGLE OR DOUBLE GANG JUNCTION BOX
HOLE PATTERN MATCHES BOTH EURO
AND US JUNCTION BOXES
1.5 x 2 WIRE ACCESS OPENING
TO JUNCTION BOX
SNAP LATCH
FOR COVER
3
C.O.1 TIP
C.O.1 RING
DO NOT locate the V-9936A or its wiring closer
than 18" to a power supply or any equipment
that generates electrical noise.
Power Connections
NOTE: The steps below must be completed for each
V -9936A being installed.
__ 1. Unplug power supply.
__ 2. Connect -24VDC "B" battery (May be
referred to as "-" or "signal battery") from
power supply to pin 30 (-24VDC) on the
V -9936A.
Reverse Power LED
__ 3. Connect -24VDC Ground ("B" ground, "+"
or "signal" ground) from power supply to
pin 29 (GND).
__ 4. Connect -24VDC ground (+) from power
supply to telephone system GND.
__ 5. Power Test:
__ a. Plug in power supply.
__ b. If power reversal LED is lit (If not lit, go to step 6).
__ (a) Unplug power supply.
__ (b) Reverse connections on V -9936A, pins
29 (GND) and 30 (-24VDC).
__ (c) Go to step 6.
__ 6. Unplug power supply.
FIGURE 2
V-9936A
Do Not Adjust
Volume Control
Speaker Select
Switch
Connecting Block
LoZ
HiZ
15
30
1
16
LOCATION OF CONNECTING BLOCK AND CONTROLS
-24VDC OUT
GROUND OUT
15 14 13 12 11 10 9
30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
-24VDC IN
GROUND IN
CONTACT CLOSURE
PAGE IN T
PAGE OUT T
CONTACT CLOSURE
PAGE IN R
PAGE OUT R
DISABLE IN
-24VDC OUT
8 7 6 5 4 3 2 1
GROUND OUT
DISABLE OUT
C.O.6 TIP
EXPANSION
C.O.6 RING
C.O.5 RING
C.O.5 TIP
C.O.4 TIP
C.O.4 RING
C.O.3 RING
C.O.3 TIP
C.O.2 TIP
C.O.2 RING
CONNECTING BLOCK PIN DESIGNATIONS
4
Connecting Arrangements
• Proceed to Figure 3 for stand-alone ringing
connections.
• Proceed to Figure 4 for ringing over paging
connections.
• Proceed to Figure 5 for telephone system
providing a dry contact closure for common
audible signaling.
WIRING INSTRUCTIONS:
Place a check by each step as it is completed.
__ 1. Connect Tip of the first Central Office Line or
PABX station number to the V -9936A pin 1
(C. O. 1 Tip).
__ 2. Connect Ring of the first line or station to
pin 16 (C. O. 1 Ring).
__ 3. Connect Tip of Line 2 to pin 2 and connect
Ring of the line to pin 17.
__ 4. Connect Tip of Line 3 to pin 3 and connect
Ring of the line to pin 18.
__ 5. Connect Tip of Line 4 to pin 4 and connect
Ring of the line to pin 19.
__ 6. Connect Tip of Line 5 to pin 5 and connect
Ring of the line to pin 20.
__ 7. Connect Tip of Line 6 to pin 6 and connect
Ring of the line to pin 21.
__ 8. If using multiple V -9936A's:
__ (a) Connect a group of 6 lines or station
numbers to each V -9936A as in steps 1-7.
__ (b) Connect wire from pin 8 (Expansion) of the
main unit to pin 8 of each additional unit.
9. If using Valcom speakers for signaling:
__ (a) Connect Tip of speaker to pin 11.
__ (b) Connect Ring of speaker to pin 26.
__ (c) If using one-way amplified speaker
assemblies:
__ (1) Connect the -24VDC speaker lead to
V -9936A pin 10.
__ (2) Connect the Ground speaker lead to pin
25.
__ (d) Set the speaker select switch to Hi Z if
using 45 Ohm talkback speakers or set it to
Lo Z if using one-way amplified speakers.
10. If using Bells or other devices for signaling:
__ (a) Connect one side of the output of an
appropriate power source to pin 12 of the
V -9936A.
__ (b) Connect the other side of the power source
to one of the input terminals on your
signaling device.
__ (c) Connect from pin 27 of the V -9936A to the
other input terminal of your signaling
device.
__ (d) Consult the information supplied with the
signaling device for additional information.
__ 11. If adding a night switch, connect it to pins 9
and 24.
__ 12. Plug in power supply (See the Power
Connection section).
__ 13. If using speakers for signaling, dial a line
connected to the V -9936A. When it starts
ringing, adjust the V -9936A volume control
to the desired level.
61Central
TO PIN 8 OF
ALL ADDITIONAL
V-9936A's
24VDC
POWER
SUPPLY
+
RING SUPPLY
15 14 13 12 11 10 9
30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
LOUD BELL
8 7 6 5 4 3 2 1
NIGHT SWITCH
SPEAKERS
Office or
Station
Lines
V-9936A
FIGURE 3 - STAND-ALONE RINGING CONNECTIONS
5
WIRING INSTRUCTIONS:
FIGURE 4 - RINGING OVER PAGING CONNECTIONS
Place a check by each step as it is completed.
__ 1. Connect Tip of the first Central Office line or
PABX station number to the V -9936A pin 1
(C.O. 1 Tip).
__ 2. Connect Ring of the first line or station to
pin 16 (C. O. 1 Ring).
__ 3. Connect Tip of line 2 to pin 2 and connect
Ring of the line to pin 17.
__ 4. Connect Tip of line 3 to pin 3 and connect
Ring of the line to pin 18.
__ 5. Connect Tip of line 4 to pin 4 and connect
Ring of the line to pin 19.
__ 6. Connect Tip of line 5 to pin 5 and connect
Ring of the line to pin 20.
__ 7. Connect Tip of line 6 to pin 6 and connect
Ring of the line to pin 21.
8. If using multiple V -9936A's:
__(a) Connect a group of 6 lines or station
numbers to each V -9936A as in steps 1-7.
__(b) Connect a wire from pin 8 (Expansion) of
the main unit to pin 8 of each additional
unit.
__ 9. NOTE: Complete the wiring and testing of
the paging system and properly adjust all
volume controls before continuing.
__10. If using Valcom paging speakers:
__(a) Note the location of the speaker wires on
the page control unit and remove them.
__(b) Connect the speaker wires removed in (a) to
pins 11 (Tip) and 26 (Ring) of the V -9936A.
__(c) Connect V -9936A pins 13 (Tip) and 28
(Ring) to the page control locations noted
in (a).
NOTE: If the page control unit provides background
music input, the page out terminals may be connected
to the BGM input and the speakers connected directly
to the Page Control Unit.
11. If using a high power amplifier:
__(a) Disconnect the paging signal wires from the
INPUT of the amplifier and connect them to
the V -9936A pins 13 and 28.
__(b) Connect V -9936A pins 11 (Tip) and 26
(Ring) to the amplifier INPUT.
__ 12. Set the speaker select switch to Lo Z.
__ 13. If adding a night switch, connect it to pins 9
and 24.
__ 14. Plug in power supply (See power
connection section).
__ 15. Dial a line connected to the V -9936A. When
it starts ringing, adjust the V -9936A volume
control to the desired level.
15 14 13 12 11 10 9
30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
24VDC
POWER
SUPPLY
+
PAGE CONTROL UNIT
AUDIO OUT
8 7 6 5 4 3 2 1
NIGHT SWITCH
SPEAKERS
6
1
V-9936A
Central
Office or
Station
Lines
6
WIRING INSTRUCTIONS
__ 1. Connect telephone system dry contact
closure to pins 15 and 8.
__ 2. If using Valcom paging speakers:
__ (a) Connect audio output from page control
unit to pins 13 and 28.
__(b) Connect Tip and Ring of each Valcom
speaker to pins 11 and 26.
NOTE: If the page control unit provides a
background music input, the page out terminals may
be connected to the BGM input and the speaker
connected directly to the page control unit.
__ 3. If using a high power amplifier, connect pins
11 and 26 to a line level input on the
amplifier.
__ 4. If using a night switch, connect it to pins 9
and 24. When the switch is closed, the
V -9936A is disabled.
__ 5. Set speaker select switch to the desired
position Lo Z (8 Ohms) on a one-way
system, Hi Z (45 Ohms) on a talkback
system.
__ 6. Plug in power supply (See the Power
Connection section).
__ 7. Test system and adjust volume as required.
TELEPHONE SYSTEM
DRY CONTACT CLOSURE
FOR NIGHT RING
V-9936A
15 14 13 12 11 10 9
30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
24VDC
POWER
SUPPLY
+
PAGE CONTROL UNIT
AUDIO OUT
8 7 6 5 4 3 2 1
NIGHT SWITCH
SPEAKERS
FIGURE 5 - CONNECTIONS FOR A TELEPHONE SYSTEM
WITH A COMMON AUDIBLE CONTACT CLOSURE
7
OPERATION
When a line rings in, the control circuitry and timer
are activated. While sensing the first incoming ring,
the unit will activate the output relay, disconnect the
page source and send a one second warble tone and
dry contact closure to the output. The relay will then
drop and paging will be reconnected. If additional
incoming rings are sensed during the next 4 seconds,
a second tone and closure will be sent. One second
tones and closures will then be sent every 4 seconds
for as long as ringing is sensed on any line. If several
units are connected together using the expansion
leads, all units will send tones if a line rings in on any
unit. Connecting the disable lead (pin 9) to ground
(pin 24) will prevent the unit from being activated.
Connecting a switch between these pins will allow
use of the V -9936A for night ringing. A simplified
schematic of the V -9936A is shown on the next page.
TECHNICAL ASSISTANCE
When trouble is reported, verify power is being
supplied to the unit and there are no broken
connections. Check voltages for proper polarity on
the cross connect block. Table 1 identifies symptoms
of some possible problems with solutions. If a spare
unit is available, continue to troubleshoot by
substituting the spare unit for the suspected
defective unit.
Assistance in troubleshooting is available from the
factory. When calling, you should have a VOM,
several clip leads, a telephone test set available and
be calling from the job site. Cal l (540) 563-2000 and
ask for Technical Support, or (540) 767-1555 for
Valcom 24-hour Faxback System or visit our website
at http://www.valcom.com.
The V -9936A is not field repairable. Valcom
equipment contains no user serviceable parts inside.
Valcom, Inc. maintains service facilities in Roanoke,
VA. Should repairs be necessary, attach a tag to the
unit clearly stating your company name, address,
phone number, contact person and the nature of the
problem. Send the unit to:
Valcom, Inc.
Repair and Return Dept.
5614 Hollins Road
Roanoke, VA 24019-5056
TABLE 1: TROUBLESHOOTING CHART
PROBLEMS
1. No ring
2. Certain lines do not ring
3. Expansion unit does not
ring
4. Low output to 45 Ohm
speaker
5. Overdrives amplified
speaker
6. Paging volume incorrect
POSSIBLE SOLUTIONS
1A. Verify -24VDC and ground on pins 30 and 29. Power reversal LED
should not be on.
1B. Verify Disable In (Pin 9) is not grounded or connected to Disable
Out (Pin 24).
2A. Verify trunk Tip and Ring connections.
3A. Verify proper connection between Expansion Input leads (Pin 8) of
units.
4A. Set Option Switch to Hi Z.
4B. Turn V -9936A volume control up.
5A. Set Option Switch to Lo Z.
5B. Turn V -9936A volume control down.
6A. Adjust paging system volume according to instructions supplied with
paging system.
NOTE: The paging system volume MUST be properly set before
adjusting the volume control on the V -9936A.
8
C.O.1
RING
DETECT
EXPANSION
VOLUME
CONTROL
PAGE IN
C.O.2
C.O.6
RING
DETECT
RING
DETECT
CONTROL
AND
TIMING
CIRCUIT
TONE
GEN.
AMP
OPTION
SWITCH
PAGE OUT
CONTACT
CLOSURE
SIMPLIFIED SCHEMATIC OF V-9936A
VALCOM LIMITED WARRANTY
Valcom, Inc. warrants its products to be free from defects in materials and workmanship under conditions of normal use and service
for a period of one year from the date of shipment. The obligation under this warranty shall be limited to the replacement, re pair or
refund of any such defective device within the warranty period, provided that:
1. inspection by Valcom, Inc. indicates the validity of the claim;
2. the defect is not the result of damage, misuse or negligence after the original shipment;
3. the product has not been altered in any way or repaired by others and that factory sealed units are unopened (A service
4. freight charges for the return of products to Valcom are prepaid;
5. all units ‘out of warranty’ are subject to a service charge. The service charge will cover minor repairs (Major repairs will be
This warranty is in lieu of and excludes all other warranties, expressed or implied and in no event shall Valcom, Inc. be liable
for any anticipated profits, consequential damages, loss of time or other losses incurred by the buyer in connection with the
purchase, operation or use of the product.
This warranty specifically excludes damage incurred in shipment. In the event a product is received in damaged condition, the
carrier should be notified immediately. Claims for such damage should be filed with the carrier involved in accordance with the
F.O.B. point.
Headquarters: In Canada
Valcom, Inc. CMX Corporation
5614 Hollins Road 35 Van Kirk Drive #11 and 12
Roanoke, VA 24019-5056 Brampton, Ontario L7A 1A5
Phone: (540) 563-2000 Phone: (905) 456-1072
FAX: (540) 362-9800 FAX: (905) 456-2269
charge plus parts and labor will be applied to units defaced or physically damaged);
subject to additional charges for parts and labor).
9
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