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Chapter 9
Troubleshooting the CTS 3010 and CTS 3210
Table 9-4
Troubleshooting Speakers
Problem
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:
•
•
•
Testing Microphones
The microphones are set up successfully when each microphone registers sound. You must supply sound
at each microphone to complete this test. The number of audio meters that are shown on the test screen
is determined by the number of microphones that have been configured in Cisco Unified
Communications Manager (Cisco Unified CM) and the version of Cisco Unified CM that you are
running.
The Microphone Troubleshooting screen displays the number of microphones available for testing:
•
•
Go to the following sections to test microphones:
•
OL-13676-05
Possible Cause
—
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 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
Guide
on Cisco.com.
CTS 3010—3 microphones. 1 audio meter is displayed per microphone, one on each of 3 test
screens.
CTS 3210—6 to 9 microphones, depending on your configuration. 2 or 3 audio meters are displayed
on each of 3 test screens:
–
The top microphone icons represent the microphone in the front row of participants seated in
the room.
–
The bottom microphone icons represent the microphones in the back row of participants seated
in the room.
Testing Microphones on the CTS 3010 and CTS 3210, page 9-20
Possible Solution
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
9-19
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Troubleshooting
