10-18
Cisco TelePresence System Administration Guide
OL-21845-01
Chapter 10 Troubleshooting the CTS 3010 and CTS 3210
Managing CTS 3010 and CTS 3210 Hardware Setup
Related Information
For more information about setting up and testing speakers, see the following documentation:
•
Cisco TelePresence System 3010 Assembly, Use & Care, and Field Replacement Unit Guide
•
Cisco TelePresence System 3210 Assembly, Use & Care, and Field Replacement Unit Guide
•
For more system troubleshooting information, see the
Cisco TelePresence System Troubleshooting
Guide
on Cisco.com.
Table 10-3
Troubleshooting Speakers
Problem
Possible Cause
Possible Solution
No sound is heard.
Speaker cable is not connected
or is only partially connected.
•
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. Push
the plug in firmly until a click is heard.
Sound heard at wrong speaker.
Speaker cable is not connected in
the correct connector.
•
Check that the speaker cable is plugged into the
correct receptor on the primary codec.
•
Plug all speakers into the primary codec.
Sound is not synchronized with
video.
—
Contact Cisco technical support.
Choppy audio during
double-talk (when both sides are
talking simultaneously).
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.
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.
