Polycom MGC-25 Getting Started Manual page 93

connect participants to the conference at this line rate or lower, according
to their individual capabilities.
In a Conference On Port, select the estimated highest transfer rate
common to all participants. The Conference On Port method forces all
conference participants to use the same video parameters. Participants
who connect to the conference do so with the quality of the participant
with the lowest line rate.
In order to maintain a minimum video quality for a Conference On Port,
there is a minimum threshold line rate that participants must support in
order to connect with video. The minimum line rates necessary to
connect to a Conference On Port are displayed in the following table.
Participants attempting to connect at rates below the minimum
conference line rate threshold are connected as Secondary (Audio Only).
Table 7-1: Conference On Port Line Rate Minimum Thresholds
Defined Conference
Line Rate (in Kbps)
128
256
384
512
768
1920
17. The Msg Service Type field is used to select Welcome (No Wait) for a
Welcome conference, Attended (Wait) for an Attended conference, IVR
for a conference with IVR Messaging Services or None for a standard
conference, that is not a Greet & Guide conference. Select the
appropriate entry. Selecting IVR assigns an IVR Service to the
conference. An IVR service allows participants to interact with the MCU
by using DTMF codes, providing useful functions such as Conference
Entry password, Conference Chairperson identification, Roll Call, Invite
and Click&View. For more information about IVR, see the MGC
Manager User's Guide, Volume II, Chapter 2.
Chapter 7 - Defining a New Video Conference
Minimum Participant Line Rate Necessary for
Video Connection (in Kbps)
Participants will connect with video if video
session can be established.
128
128
256
384
768
7-9