2
ALL CALL IN
8 OHM OUT
ALL CALL AUDIO
ALL CALL IN
8 OHM OUT
ALL CALL AUDIO
ALL CALL OUT
8 OHM OUT
ZONE 1 IN
ZONE 2 IN
ALL CALL IN
T
R
IN
T
R
IN
T
R
IN
VALCOM ONE-WAY
AMPLIFIED SPEAKER
ASSEMBLIES
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.
FIGURE 1
BLOCK DIAGRAM OF A TYPICAL PABX INSTALLATION
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
(Valcom VP-624B Class 2 power source
recommended).
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
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?
If the PABX
IMMEDIATELY
returns any type of
tones to the called party (dial tone, reorder tone,
