Polycom HDX Series Administrator's Manual page 146

Administrator's Guide for Polycom HDX Systems
Symptom
You can hear yourself on
your system's monitor or
external audio system.
There is audio feedback
when a VCR is connected.
When music is played
during the call, it sounds
distorted at the other sites.
12 - 16
Problem
The far site microphone is
too close to the system's
audio speaker. (Far-site
systems with separate
microphones only)
The far site audio volume
may be too loud.
The monitor or external
audio system is connected
to the VCR audio output.
A single VCR is connected
so that it can play or record,
no tape is present, and
VCR - Far and Near Audio
or VCR Audio Out Always
On is selected.
The music source is not
connected to the system.
The system's echo
cancellation and noise
suppression features may
interfere with music that the
microphone picks up.
Corrective action
At the far site, make sure the microphone is placed
away from the system's audio speaker.
Turn down the audio volume at the far site.
Verify that all equipment is connected correctly
according to the manufacturer's instructions and the
setup sheet you received with the system.
Place a tape in the VCR.
Connect the music source to the system's audio
input.