Polycom MGC Administrator Administrator's Manual page 245

Each MUX card contains four units. Each unit can handle 4 participants
at up to 384 Kbps, 2 participants at up to 768 Kbps or 1 participant at up
to 1920 Kbps (E1). Each unit can be configured by the Operator. For
more information about configuring MUX units, see "Viewing and
Configuring the MUX Module Specific Properties" on page 4-29. The
data is presented as totals for all MUX cards installed in the MCU:
— Number of ports available for participants of up to 384 Kbps
— Number of ports available for participants of up to 768 Kbps
— Number of ports available for participants of up to1920 Kbps
• MUX+ - Displayed is the total number of MUX+ port resources
available according to the card type, line rate and encryption. The MUX+
card, like the MUX card, is used for connecting ISDN and T1-CAS video
participants to the conference. A flexible port resource allocation
mechanism is available with the MUX+ card and allocates ports
dynamically thereby decreasing fragmentation. It enables the MCU to
allocate and free resources according to the conference requirements
without pre-configuring the Line Rate on each card unit. A conference
can be run on multiple MUX+ cards. Encrypted participants always
require MUX+ resources and use more resources than a regular
participant. IP Video participants do not require the MUX+ card, because
all IP cards have built-in MUX+ functionality. MUX+ resources are
calculated according to the relative weight assigned to the different line
rates.
The following table details the number of ports available with the MUX+
cards.
Table 5-3: MUX+ Cards Port Capacity
Participant Line
Card type
Rate
MUX+10
128
256
384
512
MGC Administrator's Guide
Number of non-
encrypted ports
capacity
18
16
10
10
Number of
encrypted
ports capacity
9
9
5
5
5-9