Cisco Cisco Unified MeetingPlace Audio Server Maintenance Manual
Cisco MeetingServer 5.1 System Manager’s Guide
174
Cisco Systems
March 2003
For example, direct T1 digital connections to the PSTN often produce the
cleanest sound quality. If the system is separated from the network by a
PBX, or is separated from the PSTN by additional gear, there is a greater
chance of impaired sound quality.
cleanest sound quality. If the system is separated from the network by a
PBX, or is separated from the PSTN by additional gear, there is a greater
chance of impaired sound quality.
Acoustic Treatment of Conference Rooms
Large conference rooms are challenging because of the likelihood that sound
echoes around the room several times before being reintroduced into the sound
system. High ceilings, glass walls, and hard tables may all produce this type of
acoustic echo problem.
echoes around the room several times before being reintroduced into the sound
system. High ceilings, glass walls, and hard tables may all produce this type of
acoustic echo problem.
To improve acoustics in conference rooms, consider the following
recommendations:
recommendations:
•
Obtain advice from an acoustic consultant.
•
Invest in a high-performance acoustic echo canceler. Echo cancelers are
designed to cancel acoustic echo signals.
designed to cancel acoustic echo signals.
•
Modify conference room decor. For example, acoustic tiling, window
drapes, and flowers can reduce room echo.
drapes, and flowers can reduce room 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 Muting
The meeting intelligibility and overall experience may be enhanced if a low
background noise level is maintained.
background noise level is maintained.
Tip: To prevent background noise from entering the meeting,
participants can use the mute feature when they are not speaking.
To activate muting, participants press #5 on their touchtone
telephone. When they want to contribute to the meeting again,
muting can be turned off by pressing #5 again.
participants can use the mute feature when they are not speaking.
To activate muting, participants press #5 on their touchtone
telephone. When they want to contribute to the meeting again,
muting can be turned off by pressing #5 again.