5 947100
With the V-9940 and V-9970, this line condition
may be quiet line sensing, a strict "time out"
(disconnects after a selected period of time) or
open loop disconnect of at least 150 milliseconds.
Open loop is a service provided by the central
telephone office and involves actually
disconnecting the telephone line from the C. O.
for a brief instant. In some cases the "quiet line"
may also be programmed via the PABX. "Quiet
line" implies that the PABX will not return any
tones (dial tone, busy tone, and reorder tone . . .
etc.) to the called station at the completion of the
station to station call. The telephone system may
be tested for a "no returned tones" status with
your test set; have someone call you on a station
and then ask them to hang up . . . if you do not
hear any tones, or if there is a delay of at least 10
seconds before you hear any tones, then the
"quiet line" (i.e. audio sense time-out) may be
used.
Ground start telephone lines are a good choice for
use with the V-9940 since a ground start line will
not return dial tone until a ground is applied to the
ring lead.
Additionally, the V-9970 recognizes re-order tones
and dial tone as disconnect signals.
The V-9940 can be used alone, or can provide
access to Valcom multi-zone and talkback page
control units.
The V-9970 may be used to access the V-2003A
and V-2006A multi-zone control units only. The
V-9970 is not compatible with any talkback page
control units.
Station Level
Page Adapter
Page
Control /
Interface
Incoming C. O.
or Centrex line or
a PABX Station
or
DIAGRAM 3
Block Diagram of Connections to a Valcom
Page Control/Interface
Your Telephone or
Telephone System
SYSTEM INSTALLATION
General
These instructions will provide a basic
understanding for wiring Valcom one-way paging
equipment and connecting it to a telephone
system.
For specific wiring information, consult the
installation practice enclosed with the actual
equipment being used
.
Precautions
Do not locate Valcom equipment or cabling within
18" of a power supply, electrical panel, or any
equipment that generates electrical noise.
Mounting
The control equipment should be installed at the
main distribution frame with the telephone system
common equipment.
The V-1109RTVA, may be mounted to the
backboard, in a 7" KTU rack or mounting frames.
A 66-type block and 25-pair pigtail with female
amphenol connector, are required for connections
to these units if the mounting frames are not used.
Other control units are wall mount units with
connections via either screw terminals, integrated
punch down block, or a user supplied 66-type
block.
Speaker Spacing
Ceiling Speakers
:
The area covered by a ceiling speaker depends
on the height of the ceiling. Refer to Table 3 for
speaker coverage.
Wall Speakers
:
A wall speaker will cover up to 600 square feet.
Wall speakers should be spaced 20 feet apart.
Good quality paging will be heard up to 30 ft. in
front of the speaker.
Corridor Speakers
:
Corridor speakers should be mounted 8 to 12 feet
high and spaced 30 to 40 feet apart.
Horn Speakers
:
Refer to Table 4 for horn speaker coverage. The
first figure given is the side to side distance
between the speakers. It is also the distance in
front of the speaker that you can expect to hear a
good quality page. The second figure given is the
area being covered in square feet.
