Technical Assistance - Valcom ONE-WAY PAGING SYSTEM Design/Information

One-way paging system

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Table 6 – Number of Speakers per Power Run

(CAT 3/5/5E/6, 22 & 24AWG)

Quantity of Speakers/Horns

1 Watt

Signature

Interior

Series

Spkrs

Bridges and Backboxes

Ceiling speaker bridges provide support to

prevent ceiling tile from sagging from the weight of

the speaker. They are designed for use with

standard 2' wide ceiling tiles and distribute the

weight of the speaker assembly across the tile

and onto the tile support grid.

Ceiling speaker backboxes provide an acoustic

enclosure behind the speaker for better sound

quality. They also protect the speaker from debris

in the ceiling and meet most local fire codes for

use in air plenum return ceilings. See Table 9 for

Speaker and Bridge/Backbox compatibility.

Volume Adjustments

Master volume controls are located on most

Valcom page control units. Each one-way

speaker assembly also has its own volume

control. When installing a system, set the master

control to ½, and all speaker and horn volume

controls to 1/2 volume. After powering up the

system, adjust the individual speakers to the

desired level.

The master control may then be used to change

the volume of the entire system. If background

music is being supplied, the background music

level should be adjusted last. To provide volume

control to a certain room or area, V-1092 or

V-2992-W Wall Mount Volume Controls may be

added to a zone, or to a section of a zone.

Maximum

Wire Run

Distance (Ft)

15W

30W

AWG

1000

1600

500

800

250

400

125

200

SYSTEM OPERATION

Circuit Description

Each Valcom page control unit contains the

circuitry required to interface with a telephone

system, plus a preamplifier circuit, and in some

cases dial select circuitry and/or provisions for

background music switching. Each one-way

amplified speaker assembly contains a speaker,

amplifier, and volume control in a suitable baffle or

housing. The speakers and control units require a

-24VDC power supply (-48VDC for the V-1038) to

operate.

Connections from the control unit to the telephone

system are described in detail in the manual that

is shipped with the control unit.

The audio pair from the control unit to the

speakers may be looped (speakers wired in

parallel) between all speakers in a zone (See

Table 5). A second pair must be run to each

speaker to supply the DC voltage required for

operation (See Table 6). Standard 22 or 24AWG

telephone cable may be used for the speakers.

When accessing a single zone control unit from

the telephone system, you will immediately be

connected to the speakers and allowed to page.

When accessing a multizone control unit from the

telephone system, you will receive Valcom dial

tone from the Valcom unit. After dialing the code

for the zone desired, you will be connected to that

group of speakers and allowed to page. All

Valcom control units automatically release when

you hang up the telephone.