2
947526
Machine
Shop
(Noisy)
90
80
70
60
50
10'
20'
30'
40'
50'
Shipping
(Moderate)
Waiting
Rooms
(Quiet)
Talkback not recommended above 80dB
TYPICAL REPLY DISTANCE CHART
Maximum Talkback Reply Distance
Limitations
Two talkback plus 40 one-way amplified
speakers maximum per zone when mixing
talkback and one-way paging.
800 feet maximum cable length to speaker
from page control.
NOTE: Do not split pairs to speakers.
Do not use talkback in noisy areas (80dB or
greater).
Valcom recommends that the total number of
speakers per talkback zone be limited to two
talkback and forty one-way self-amplified speakers.
The reasoning behind this recommendations is
simple. Whenever a page is made into a talkback
zone, the paging party will hear audio from all of the
talkback speakers in that zone. If a zone contains
more than two talkback speakers, the talkback
audio from the “extra” speakers will impede the
quality of the talkback audio from the desired
speaker. Additionally, there are limits to the
number of talkback speakers that a page control will
actually drive. Ideally, if a page were made into a
talkback zone, all of the speakers would simply act
like “one-way” speakers except for the one that is
closest to the paged person
FIGURE 1: TYPICAL CONNECTIONS
NOTE: Do not connect this speaker directly to a
25/70/100 Volt amplifier as damage to both the
amplifier and speaker may occur.
A V-1095 may be used to allow the use of
Valcom self-amplified speakers on 70V speaker
lines.
INSTALLATION
Connections
Two conductor twisted wire is required for the 45
Ohm talkback speakers. Standard 22 or 24 gauge
station wire is acceptable. Shielded wire is not
required or recommended.
Connections are as follows:
Speaker out from page control to speaker tip
Speaker common to speaker ring
TROUBLESHOOTING CHART
SYMPTOMS
ACTIONS
No sound in page mode
Check tip and ring for audio at speaker.
Check tip and ring for audio at control unit.
Low sound in page mode
Check volume controls at page control.
Poor listening in talkback
mode
Check talkback volume control at page control. Set control
where audio is clearly audible.
Check presence and polarity of LED input signal.
