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Chapter 8
Troubleshooting the CTS 3000 and CTS 3200
Troubleshooting Speakers
Use the information in
Table 8-4
Troubleshooting Speakers
Problem
No sound is heard.
Sound heard at wrong speaker.
Sound is not synchronized with
video.
Choppy audio during
double-talk (when both sides are
talking simultaneously).
Related Information
For more information about setting up and testing speakers, see the following documentation:
•
•
•
OL-13676-05
Table 8-4
Possible Cause
Speaker cable is not connected
or is only partially connected.
Speaker cable is not connected in
the correct connector.
—
Audio Echo Canceller (AEC)
very briefly mistakes one of the
speech patterns for noise and
cancels it, resulting in choppy
audio.
•
The audio from the remote
side is slightly attenuated
before it is played out the of
the speaker.
The echo cancellation
•
feature removes some of the
sound from the talkers
during the double talk.
Cisco TelePresence System 3000 Assembly, Use & Care, and Field Replacement Unit Guide
Cisco TelePresence System 3200 Assembly, Use & Care, and Field Replacement Unit Guide
For more system troubleshooting information, see the
Guide
on Cisco.com.
to troubleshoot speakers.
Possible Solution
Check that the red and black pronged ends of the
•
speaker cable are securely fastened under their
corresponding connectors on the speaker.
•
Check that the speaker cable is plugged into the
correct receptor on the primary codec.
•
Tug on the plug to see if it is fully plugged in. Press
the plug in firmly until a click is heard.
Check that the speaker cable is plugged into the
•
correct receptor on the primary codec.
•
Plug all speakers into the primary codec.
Contact Cisco technical support.
Check whether there has been a change in the echo path
(someone has moved the speaker or microphone, or
maybe a laptop directly in front of a mic). Otherwise,
this is expected behavior. The existing filter parameters
should be enough to cancel out the sound from the
speaker. However, during double-talk, echo
cancellation will always remove some sound from the
talker.
Cisco TelePresence System Troubleshooting
Cisco TelePresence System Release 1.6 Administration Guide
Managing Hardware Setup
8-17
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Troubleshooting
