Cisco Cisco Unified MeetingPlace Audio Server Maintenance Manual
7-24 Solving problems
Cisco MeetingPlace Audio Server System Manager’s Guide
February 27, 2004
Conditions that affect sound quality
The sound quality of MeetingPlace meetings depends on the type of telephone
used, the type of telephone network called on, and the amount and type of
ambient noise in the environment from which the call comes.
used, the type of telephone network called on, and the amount and type of
ambient noise in the environment from which the call comes.
The following sections describe the sound quality that can be expected in
various calling conditions.
various calling conditions.
Conference room acoustics
To improve acoustics in conference rooms, consider the following:
• Talk to an acoustic consultant.
• Invest in a high-performance acoustic echo canceler. Echo cancelers
cancel acoustic echo signals.
• Modify conference room decor. For example, add acoustic tiling,
window draperies, and flowers to reduce echo.
Room calibration
Even if a room has been equipped for improved acoustics, operating
conditions can change significantly from day to day. Room temperature,
participant movement, and line connections can all change the acoustic
performance of echo canceler gear.
conditions can change significantly from day to day. Room temperature,
participant movement, and line connections can all change the acoustic
performance of echo canceler gear.
We recommend performing room calibration before starting a conference
call if the room has previously suffered from bad sound quality. Contact
your MeetingPlace support representative for details.
call if the room has previously suffered from bad sound quality. Contact
your MeetingPlace support representative for details.
Background noise
The meeting intelligibility and overall experience may be enhanced if a
low background noise level is maintained.
low background noise level is maintained.
To prevent background noise from entering the meeting, participants can
use the mute feature when they’re not speaking. To activate muting,
participants press
use the mute feature when they’re not speaking. To activate muting,
participants press
#5
on their touch-tone telephone. When they want to
contribute to the meeting again, muting can be turned off by pressing
#5
again.
Varied line levels
For conferences in which attendees consistently complain about audio
volume levels that are too high or too low, MeetingPlace can be adjusted to
help line level mismatches. This problem may occur when rural locations
are called and the overall conference audio level is very low. Conversely,
loud connections can occur if a short-distance, all-digital connection is
provided.
volume levels that are too high or too low, MeetingPlace can be adjusted to
help line level mismatches. This problem may occur when rural locations
are called and the overall conference audio level is very low. Conversely,
loud connections can occur if a short-distance, all-digital connection is
provided.
Your MeetingPlace support representative can remotely adjust the
conference target levels that are too high or too low.
conference target levels that are too high or too low.
N
OTES
• If a headset user’s volume level is consistently low and is accompanied
by elevated background noise, their headset amplifier module might
need new batteries.
need new batteries.
• If a headset user’s volume level is consistently loud and distorted, their
headset microphone boom might be too close to their mouth. Move the
microphone boom slightly away from the mouth to lower the volume to
comfortable levels. This will also reduce or eliminate distortion.
microphone boom slightly away from the mouth to lower the volume to
comfortable levels. This will also reduce or eliminate distortion.
Factor
Resolution