8-22
Cisco TelePresence System Release 1.6 Administration Guide
OL-13676-05
Chapter 8 Troubleshooting the CTS 3000 and CTS 3200
Managing Hardware Setup
Related Information
For more information about setting up and testing displays, see the following documentation:
•
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
Cisco TelePresence System Troubleshooting
Guide
on Cisco.com.
Testing the External Presentation Display
By default, presentations are displayed as presentation-in-picture (PiP) on the center screen of
multi-screen main display systems. You can optionally add an external presentation display screen that
displays the presentation instead of displaying it as PiP on the main display screen. This display is
attached to the External Presentation Display HD video connection on the codec.
Note
A PiP softkey will be displayed on the CTS Cisco Unified IP phone only if a PiP is active. PiP is not
available for audio-only calls.
See the following documentation for more information:
•
Cisco TelePresence System 3000 Assembly, Use & Care, and Field Replacement Unit Guide
•
Cisco TelePresence System 3200 Assembly, Use & Care, and Field Replacement Unit Guide
Note
See the
“Important Notes About Presentation Displays” section on page 8-36
.
Microphone switches to a
segment that has no one talking.
Phantom switching.
Run the microphone calibration procedure in the
“Testing Microphones on the CTS 3000” section on
page 8-18
or
“Testing Microphones on the CTS 3200”
section on page 8-19
.
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.
Table 8-5
Troubleshooting Microphones (continued)
Problem
Possible Cause
Possible Solution
