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Polycom®, Inc. 701
Resource Usage in AVC CP Conferencing
Video resources usage varies according to the video resolution used by the endpoints. The higher the video
resolution (quality), the greater the amount of video resources consumed by the MCU.
For information on resource usage vs. resolution, see Polycom RealPresence Collaboration Server
1500/1800/2000/4000 (depending on the machine) Hardware Guide.
AVC Conferencing - Voice
In Collaboration Server 1500/2000/4000 in MPMx Card Configuration Mode, one Audio Only resource is
used to connect a single voice participant when CIF resources have been converted to Audio Only.
However, if no CIF resources were converted, Audio Only endpoints use one CIF video resource per
connection.
When video ports are fully used, the system cannot use free audio ports for video. When audio port
resources are fully used, video ports can be used, using one video port to connect one voice participant.
In Collaboration Server 1500/1800/2000/4000 in MPMRx Card Configuration Mode, a voice port equals a
CIF video port and there is no differentiation between voice and video ports.
Resource Capacity Modes
The installed media card type (MPMx or MPMRx) determines the Card Configuration Mode, which in turn
determines the resource allocation method that can be selected for the MCU. The resource allocation
method determines how the system resources are allocated to the connecting endpoints and it is defined in
the Video/Voice Port Configuration.
Resource Capacity Allocation per Line Rate in VSW Conferencing Mode
Resource Type
Maximum Possible Resources (CIF Video Resources)
RMX 1500 RMX 1800-3 RMX 2000 RMX 4000
MPMx MPMx MPMRx MPMx MPMRx
Voice (IP) 360 360 720 260 1440 520
Voice (PSTN) 120 120 400 260 400 400
VSW 2Mb 80 200 160 130 320 260
VSW 4Mb 40 150 80 130 160 260
VSW 6Mb 20 100 40 100 80 200
ISDN 4 E1 or 9 T1
(per RTM ISDN card)
7 E1 or 9 T1 (per RTM ISDN card)
MCUs with 500MB of memory can support a maximum of 400 simultaneous participant calls,
regardless of how system resources are allocated.
MCUs with 1000MB of memory are not subject to this limitation.
MCU memory size is listed in the Administration > System Information properties box. For more
information see System Information.