Lost Packet Recovery Guidelines; Enabling Lost Packet Recovery - Polycom RMX 1500 Administrator's Manual

Lost Packet Recovery Guidelines

• LPR is supported in H.323 and SIP 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:
— H.323 and SIP endpoints are supported.
— When cascading between conferences running on RMX and
MGC (Polycom legacy MCU), LPR is not supported over the link
between the two conferences.
— 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.
• VSW Conferences – If Video Switching is selected, the LPR check box
is automatically cleared and LPR is disabled. LPR can be enabled for
VSW conferences but H.320 and SIP participants will not be able to
connect.
For more information, see "Defining Profiles" on page 1-8.
Chapter 2-Additional Conferencing Information
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