Polycom MGC Manager User Manual page 221

MGC Manager User's Guide - VoicePlus Edition
endpoints are used for conferencing, a separate Entry Queue must be defined
to allow participants to maintain high the audio quality.
For more information on Entry Queue Service definition, see "Defining a
New Audio Only Entry Queue" on page 5-13.
A conference may be accessed by dial-in participants directly or through an
Entry Queue.
If you are defining a conference that is accessed through an Entry Queue, you
do not need to define the Meet Me Per Conference parameters.
Participants can be moved from the Entry Queue to a target conference that
has the same line rate and media settings. In audio conferences, the audio
algorithm may be different when IP Only participants connect to the Entry
Queue, or when the VTX 1000 endpoint is used.
5-3