Symptom Cause Solution
the same intercom line.
A headset extension cord
was used.
Headset extension cords
are not recommended.
VOX problems (KB-
702GM/KB-802GM-IM
only)
Stays tripped (amber light
on). Sensitivity set too
high.
Turn VOX sensitivity control
in a counter-clockwise
direction.
Will not trip with voice.
Sensitivity set too low.
Turn VOX sensitivity control
in a clockwise direction.
Note: VOX is intended for
close-in operation.
Excessive crosstalk
High DC resistance has a
ground return.
Use heavier cable; add
additional conductor(s) to
ground return. If the cable
run is exceptionally long,
consider adding and using
the EB7-4W four-wire
option module.
Multi-channel cable pairs
are not individually
shielded.
Replace cable with
individually shielded pairs.
Headset cables are not
wired properly or shielded
properly.
Correct wiring. Use
headsets with properly
shielded wiring. Refer to the
chapter “Operation.”
Program signal sounds
distorted.
Program level control set
too high.
Turn the program level
control counter-clockwise.
Overload of program input
circuit.
Reduce the gain of the
program signal at the
source, such as an audio
mixer.
Call signal does not
function.
Excessive DC loading of
intercom line.
Remove any audio
transformers or other
equipment that may be
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