Related Information; Testing Microphones; Testing Microphones On The Cts 1100 - Cisco CTS 1000 - TelePresence System 1000 Video Conferencing Administration Manual

Managing CTS 1100 Hardware Setup
Table 7-4 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
Assembly, Use & Care, and Field Replacement Unit
For more system troubleshooting information, see the
Guide

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
Note
microphones that have been configured in Cisco Unified CM and the version of Cisco Unified CM that
you are running.
Go to the following sections to test microphones:
•
•
•

Testing Microphones on the CTS 1100

To set up the microphones for testing on the CTS 1100:
Step 1 Choose Troubleshooting > Hardware Setup.
Cisco TelePresence System Administrator Guide
7-20
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.
on Cisco.com.
Testing Microphones on the CTS 1100, page 7-20
Troubleshooting Microphones, page 7-21
Related Information, page 7-22
Chapter 7
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 1100
Guide.
Cisco TelePresence System Troubleshooting
Troubleshooting the CTS 1100
OL-21845-01