v-9940
Issue 5
V-9940
EXPANDABLE STATION LEVEL PAGE ADAPTER
INTRODUCTION
The V-9940 is an Expandable Station Level Page
Adapter designed to provide ring trip and page
access circuitry for use on standard device telephone
lines. These instructions contain the specifications
and information necessary to install, operate and
maintain the V-9940 Expandable Station Level Page
Adapter.
IMPORTANT: Please review dip switch
settings (page 3) for equipment suitability.
FCC Information
When installing the V-9940, contact the local
Telephone Company and give them the following
information:
• The telephone number of the line to which the
V-9940 will connect;
• The FCC Registration #: BAF9I7-13957-OT-N;
• The ringer equivalence number: 1.1A
If the V-9940 is disconnected from its present line,
contact the local Telephone Company to make them
aware of the change.
Telephone Company Procedures: the goal of the
telephone company is to provide the best service
possible. In order to do this, it may occasionally be
necessary for them to make changes in their
equipment, operations or procedures. If these
changes potentially affect the service or the operation
of customer equipment, the Telephone Company will
give written notice to allow any changes necessary to
maintain uninterrupted service.
SPECIFICATIONS
Access Methods
• Centrex numbers
• Loop start and ground start central office lines
• PABX station numbers
Figure 1 depicts a block diagram of a typical PABX
installation.
Features
• Ring trip on first ring
• 600 Ohms output; 8 Ohms output with AGC
• Multiple units may be used for multi-zone
paging with all call behind a PABX
• Use with Valcom multi-zone page control unit
for multi-zone paging Centrex or C. O. lines
(DTMF signaling only)
• Use with Valcom handsfree page units for
talkback paging
• Background music input
• Open loop detect reset
• Audio sensing circuit for reset
• Time out reset
• Manual reset
• Answer verification tone
• All call override tone
• Battery reversal indicator
• Auxiliary Make/Break contact
• Built in 66 type connection block
• Complies with UL 145
1 947740
ZONE 1 IN
ZONE 2 IN
ALL CALL IN
NOTE:
When used with a PABX, the PABX must not
return any tones to the called party after calling
party disconnect on a station to station call.
T
ALL CALL IN
IN
8 OHM OUT
R
ALL CALL AUDIO
T
ALL CALL IN
IN
8 OHM OUT
R
ALL CALL AUDIO
T
ALL CALL OUT
IN
8 OHM OUT
R
BLOCK DIAGRAM OF A TYPICAL PABX INSTALLATION
FIGURE 1
VALCOM ONE-WAY
AMPLIFIED SPEAKER
ASSEMBLIES
Capacity
• Each V-9940 provides one zone of paging
(when connected to its own PABX station
number).
• Use a V-9940 and a station number per zone for
multi-zone paging behind a PABX.
• An additional station number and V-9940 may
be used to provide all call or override in a
one-way multi-zone system behind a PABX.
• One V-9940 may be used with a Valcom
multi-zone page unit to provide up to 36 zones
of paging on Centrex or central office lines
(DTMF signaling only).
Dimensions/Weight
• 8.20" H x 4.55" W x 2.30" D
(20.83cm x 11.56cm x 5.84cm)
• 1.7 lbs. (0.77 kg)
Power Requirements
-21.5 to -26VDC "B" Battery, 200mA maximum
(recommend Valcom’s VP-624B Class 2 power
source).
Environment
Temperature: 0 to +50°C
Humidity: 0 to 85% (non-precipitating)
Specifications
Tip and Ring Input: 600 Ohms
Voltage for Ring Trip: 75-105VAC
(20 or 30Hz)
Ring Trip Timing: 150ms
Open Loop Detect: 150ms starting 1
second after ring trip
Audio Sense Release: 4, 8, 16, 32 or 64
seconds after audio drops below -22dBm
Time Out Release: 1, 4, 8, 16, 32 or 64 seconds
Manual Reset: 25ms ground
Output 1:
Impedance: 600 Ohms
Page Level Output Level: Input Level -1dB
Music Level Output Level: Input Level
Output 2:
Impedance: 8 Ohms
Page Level: -10dBm
Music Level: -17dBm
Music Source: 8 to 600 Ohms
-10 to -18dBm
Answer Verification Tone: 500Hz: 250ms On;
250ms Off
Form C Contacts: 30VDC, 2.0 Amps or
125VAC, 1.0 Amp
DESIGN
General
The Valcom V-9940 Expandable Station Level Page
Adapter is designed to provide access to paging from
a standard PABX station number, a Centrex number
or a Central Office line. It should not be used on
coin service lines or party lines. The V-9940 may be
directly connected to Valcom One-Way Amplified
speaker assemblies or may be used in conjunction
with Valcom one zone or multi-zone page adapters.
The following sections describe possible
arrangements and detail the equipment required.
When One-Way Amplified Speaker Assemblies are
specified, consult the Valcom catalog for the style
desired. Once the style and quantity of speakers are
determined, select the appropriate power supply after
referring to the Valcom One-Way Paging VSP or the
Marketing Guide.
PABX Station Level Paging
NOTE: Before proposing Station Level Paging,
perform the following test:
1. Dial between two stations on the PABX and
answer the call.
2. Have the called party keep listening while the
calling party hangs up.
3. After calling party release, what does the called
party hear?
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If the PABX IMMEDIATELY returns any type of
tones to the called party (dial tone, reorder tone, etc.)
then STATION LEVEL PAGING CAN NOT BE
USED. Consult the Valcom catalog for an
appropriate trunk level page adapter. If there is
silence of at least 10 SECONDS before any tones are
returned, then one-way paging may be used. If the
line REMAINS SILENT for at least 1 and 1/2
minutes after disconnect, then one-way or talkback
paging may be used.
If the type of paging desired is possible on a station
level of the PABX, continue in this section to
determine equipment required.
• One Zone of One-Way Paging:
This arrangement requires one PABX station
number, one V-9940 page adapter, appropriate
Valcom One-Way Amplified Speaker Assemblies
and a -24VDC power supply.
• Multi-Zone One-Way Paging with All Call:
This arrangement requires a PABX station number
and V-9940 for each zone and an additional number
and V-9940 for all call. One-Way amplified Speaker
Assemblies and -24VDC power supplies are also
required.
• One Zone of Talkback Paging:
This arrangement requires one V-9940, one
V-9941A, one-zone talkback unit, appropriate 45
Ohm talkback speakers (maximum 2), and a
VP-624B power supply. See Note.
Centrex or C. O. Line Access to
Paging:
Note: Although the V-9940 will work on both
loop start or ground start lines, when using
Centrex service, ground start lines provide better
security against returned tones. In addition,
Centrex lines should be optioned for cut OFF
when disconnect occurs.
• One Zone of One-Way Paging:
One zone of One-Way Paging requires one Centrex
or C. O. Line, a V-9940, One-Way Amplified
Speaker Assemblies and a -24VDC power supply.
• Multi-Zone One-Way Paging:
Multi-zone One-Way Paging requires one Centrex or
C. O. Line, a V-9940, a dial select page control unit
(V-2003A, V-2006A, V-1109RTVA, V-119RTVA
or V-136RTHF), appropriate One-Way Amplified
Speaker Assemblies and a -24VDC power supply.
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Note: All Call is included with the V-2003A,
V-2006A and the V-1109RTVA.
It may be added to the V-119RTVA with a V-1118
and to the V-136RTHF with a V-1134. See Note.
• One Zone of Talkback Paging:
One Zone of Talkback Paging requires one Centrex
or C. O. Line, one V-9940, one V-9941A, one zone
talkback unit, 45 Ohm talkback speakers (maximum
2) and a VP-624B power supply. See Note.
• Multi-Zone Talkback Paging:
Multi-Zone Talkback Paging requires one Centrex or
C. O. Line, one V-9940, a dial select page control
unit (V-2003AHF, V-2006AHF, V-1109RTHF,
V-119RTHF or V-136RTHF), appropriate talkback
speakers and a -24VDC power supply.
NOTE: One-way All Call is included with the
V-2003AHF, V-2006AHF, and V-1109RTHF. It
may be added to the V-119RTHF with a V-1118
and to the V-136RTHF with a V-1134. See Note.
Wiring of each arrangement is covered in the
Installation Section.
NOTE: When using the V-9940 Expandable
Station Level Paging Adapter to access multi-zone
or handsfree control units, it should be
understood that the quality and noise
characteristics of the C . O. Line circuit may
affect the operation of this equipment adversely.
Dip Switch Settings
The dip switch settings are crucial to proper
operation of the V-9940 and are different for each
application. The dip switches select the way the
V-9940 releases from the line and how long a page
may be made. There are three ways the V-9940
releases from the line that are dependent on dip
switch settings:
Open Loop Detect
The V-9940 detects a 150ms or longer break in loop
current one second after ring trip and release from
the line. The one second delay in line supervision is
allowed due to the instability of some C. O. and
Centrex lines for the first second after ring trip.
Dip switch settings: Set dip switches 1 and 8 "ON",
dip switches 2 through 7 "OFF".
NOTE: This setting provides unlimited page
length. In certain instances a default timeout
release is recommended. To select a default
timeout, turn one of dip switches 2 through 7
"ON". Refer to Figure 4 for the maximum page
length each dip switch allows.
110-16, 110-17, and 110-18 of the National
Electrical Code, ANSI/NFPA No. 70.
Time Out Release
The V-9940 will release from the line a
pre-determined amount of time after ring trip as
determined by dip switch settings.
Typical Applications: Access from a PABX Station
to one zone of talkback page (station level access not
normally used with talkback).
Dip Switch Settings: Set dip switches 1 and 8 "ON".
Set one of dip switches 2 through 7 "ON" to select
the maximum page length.
NOTE: This setting assigns a limited page length.
See PABX Station level Paging to determine if the
PABX is compatible for station level page.
Audio Sense Release
The V-9940 will release from the line after a
pre-determined amount of time that silence is
detected as determined by dip switch settings.
Typical Applications: Access from a PABX Station
to one zone of one-way page or multiple zones of
one-way page using multiple PABX stations and
multiple V-9940s.
Dip switch settings: Set dip switch 1 "OFF", dip
switch 8 "ON". Set one of dip switches 2 through 7
"ON" to select the length of time the unit stays active
after last sensing audio. (Normally dip switch 6 or 7
- for 8 or 4 seconds).
NOTE: This setting provides unlimited page
length. See PABX Station Level Paging to
determine if the PABX is compatible for station
level page. When used with talkback paging, the
talkback audio may delay or cancel the audio
sense release.
In some special applications, a manual reset can be
used to provide release from the line by providing a
momentary ground to the manual reset pin of the
V-9940.
INSTALLATION
Regulatory Information
This equipment is to be installed only in restricted
access areas (dedicated equipment rooms, equipment
closets or the like) in accordance with Articles
CAUTION: To reduce the risk of electric shock,
Refer servicing to qualified service personnel.
When using this equipment, basic safety precautions
should always be followed to reduce the risk of fire,
electric shock and injury to persons including the
following:
1. Never install telephone wiring during a
lightning storm.
2. Never install telephone jacks in wet locations
unless the jack is specifically designed for wet
locations.
3. Never touch uninsulated telephone wires or
terminals unless the telephone line has been
disconnected at the network interface.
4. Use caution when installing or modifying
telephone lines.
General
The following sections contain step-by-step
instructions for wiring the V-9940 and associated
Valcom equipment. If the results of a test do not
correspond with what is shown, DO NOT
PROCEED UNTIL THE PROBLEM HAS BEEN
CORRECTED.
During installation, Figure 2 may be referred to for
location and numbering of punchdown block. Refer
to Figure 3 for punchdown block pinouts and Figure
4 for dip switch settings.
NOTE: To aid system testing and balancing, be
sure to set the individual volume controls at
approximately ½ volume when installing one-way
amplified speaker assemblies.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
Do not remove cover.
No user serviceable parts inside.
This symbol indicates that dangerous
voltage constituting a risk of electric
shock is present within this unit.
This symbol indicates that there are
important operating and maintenance
instructions in the literature accompanying
this unit.
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