Adjusting Video Encoder Quality; Disabling Access To The Local Directory - LifeSize Passport User Manual

Adjusting Video Encoder Quality

You can adjust the quality of the video image sent to the far end during a call by specifying a
relative lower or higher resolution in the Administrator Preferences : Video : Video
Quality : Video Encoder Quality preference. Moving the slider to the right decreases the
resolution of the video sent to the far end and improves the quality of the video image.
Consider using this preference to make minor adjustments to the quality of the video image
sent to the far end.
Enabling H.241 MaxStaticMBPS
The ITU-T Recommendation H.241 includes definitions of optional parameters that
decoders can support and communicate as their capabilities to other devices. When you set
the H.241 MaxStaticMBPS preference in Administrator Preferences : Video : Video
Quality to Enabled, the LifeSize codec can send near end video at a higher resolution to
third party far end devices that communicate support for the MaxStaticMBPS optional
parameter.
Adjusting the MTU of Video Packets
Video packets that exceed the maximum transmission unit (MTU) size for any router or
segment along the network path may be fragmented or dropped. This results in poor quality
video at the receiving device. You can set the MTU of video packets that your LifeSize
system sends. The default value is 1440 bytes. The allowed range is 900 -1500 bytes. To set
the MTU for video packets, access Administrator Preferences : Video :
Video Quality : Video MTU.

Disabling Access to the Local Directory

By default, users can place calls using entries in the local directory and add, remove, or
modify these entries. For more information, refer to "Placing a Call from the Directory" on
page 13.
Administrators can disable user access to the local directory by setting Local Directory to
Disabled in Administrator Preferences : Directory : General. Disabling access to the local
directory also disables the following:
• saving entries from the REDIAL list to the local directory
• copying corporate directory entries to the local directory
• access to the Skype contact list
54 LifeSize Passport User Guide