Valcom v-9936a Service Manual

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