Audio Issues - LifeSize User Manual

Poor Quality Far End Video
During a call, the LifeSize system automatically selects the best video algorithm based on
the video source and capabilities of the remote system. If you experience poor motion
handling or visible tiling in the far end picture during a video call, contact your administrator.

Audio Issues

A LifeSize system automatically selects the best audio algorithm based on the call rate and
the capabilities of the remote system. The following issues are related to the audio quality.
Absent Dial Tone
If you do not receive a dial tone after pressing the or key on LifeSize Phone to
initiate a call, ensure the line out is securely connected.
An absent dial tone may also result from an unavailable analog phone line connection. If you
are connecting with PSTN, ensure the analog phone connection is secure and that it is
connected to an active phone line jack.
Problematic Sound Quality
The LEDs on the LifeSize Phone flash blue to indicate an incoming call. If you are unable to
hear the phone ring when an incoming call arrives, adjust the volume using the up and down
volume key. If you still experience audio problems, adjust the Ring Tone Volume preference
in User Preferences : Audio.
Muffled audio reception from the far side may be caused by highly reverberant rooms. If you
are experiencing poor audio reception, add more sound absorbency to the room and speak
in close proximity to the phone or microphone.
Degradation in the audio quality can also be caused by faulty microphones or dust and
debris on the microphones. Do not use any kind of liquid or aerosol cleaner on LifeSize
devices that include microphones. A soft, slightly damp cloth should be sufficient to clean
the top surface of the units if necessary.
When using an external microphone, do not place the microphone less than 5 feet away
from the loudspeaker. Also, ensure the external microphone gain is not set too high or
distortion or an echo may occur.
LifeSize Video Communications Systems User Guide 41