RMX 2000 Administrator's Guide - Polycom Support

Lost Packet Recovery Guidelines
Polycom RMX 2000/4000 Administrator’s Guide
• LPR is supported in H.323 networking environments only.
• In LPR-enabled Continuous Presence conferences:
— Both LPR-enabled and non LPR-enabled endpoints are
supported.
— The LPR process is not applied to packet transmissions from non
LPR-enabled H.323, SIP and H.320 endpoints.
• In LPR-enabled Video Switched conferences:
— SIP and H.320 endpoints are not supported.
— Cascaded links to MGC are not supported.
— Non H.323 participants cannot be created, added or moved to
LPR-enabled Video Switched conferences.
• When connecting via an Entry Queue:
— A participant using an LPR-enabled endpoint cannot be moved
to a non LPR-enabled conference.
— SIP and H.320 participants cannot be moved to LPR-enabled
Video Switched conferences.
• If packet loss is detected in the packet transmissions of either the
video or Content streams:
— LPR is applied to both the video and Content streams.
— DBA allocates bandwidth from the video stream for the insertion
of additional packets containing recovery information.
Enabling Lost Packet Recovery
LPR is enabled or disabled in the Conference Profile dialog box.
• CP Conferences – LPR is enabled by default in the New Profile –
Advanced dialog box.
• HD VSW Conferences – If High Definition Video Switching is selected,
the LPR check box is automatically cleared and LPR is disabled. LPR
can be enabled for HD VSW conferences but H.320 and SIP
participants will not be able to connect.
For more information, see "Defining Profiles” on page 1-8.
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