2
SYSTEM DESIGN
Telephone System Requirements
The V-9937 is designed to work with telephone
system
page ports, which provide an audio pair (8
to 600 Ohms) and a dry contact closure for
control. This will be referred to as
Arrangement
1.
The V-9937 may also be used with page ports (8
to 600 Ohms) that do not have control leads, with
two feature limitations:
1
) If background music is desired, the telephone
system must be capable of providing the
switching instead of the V-9937;
2)
The AGC and pop suppression circuitry will not
be enabled on a standard page (they will still
work on page override). This will be referred to
as
Arrangement 2.
NOTE: Refer to the Installation section for
Arrangement 1 and 2 connecting information.
Equipment
A complete one zone one-way page system using
the V-9937 will be made up of the following:
•
Telephone system page card (if page ports
are not standard)
•
V-9937 page port adapter
•
Valcom one-way amplified speaker
assemblies (or existing high power amplifier
and speakers)
•
-24VDC power supply
Optional (depending on individual job
requirements):
•
Music
source
•
V-9942 Tone Module
INSTALLATION
Instructions
The following sections contain step by step
instructions for wiring the V-9937. 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 of your Valcom system will 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.
NOTE: The telephone system referred to in
this manual is the customer premise
equipment such as an electronic key system, a
PABX or a dedicated single line telephone (s).
The V-9937 is not intended for direct or indirect
connection to the public telephone network or
to PABX analog station ports. When used with
a customer premise telephone system such as
a key system or PABX system, these units are
interfaced to the system via a fully protected
page port or system central office port, which
is a fully protected interface device. Also, the
host system must be configured to disallow
central office trunk conferencing in order to
prevent indirect connection to the public
network.
.
Electronic
Key System
C. O. Line
Port
V-9937
Music
Source
Power
Supply
FIGURE 1 - SIMPLIFIED BLOCK DIAGRAM OF A TYPICAL INSTALLATION
One-Way Amplified
Speaker Assemblies
Page Port
Contact
Closure
Input 1
Input 2
Control
Input 3
(Arrangement 1)
Output 1
Pwr
Output 2
Pwr
Page
+
Music
Page
Only
