Polycom RealPresence 1500 Administrator's Manual page 722

The following table lists the ISDN supported bit rates and their respective participant connection capacities
per RTM ISDN card:
ISDN – E1/T1 Connection Capacity vs. Bit rate
Bit Rates
(Kbps)
(Bonded)
E1
128 40
192 40
256 40
320 40
384 34
512 25
768 17
1152 11
1472 9
1536 8
1920 7
MCU Resource Management by RealPresence Resource Manager CMA
and RealPresence DMA
When the RealPresence Resource Manager, Polycom CMA and Polycom RealPresence DMA system are
part of the solution, following a request by the RealPresence Resource Manager, Polycom CMA or Polycom
RealPresence DMA system, the MCU will send updates on resource usage to both CMA and DMA, with
each application updating its own resource usage for the MCU. This provides better management of the
Collaboration Server resources by the RealPresence Resource Manager, Polycom CMA and Polycom
RealPresence DMA system.
Guidelines
● Resource usage updates from RMX to the CMA and DMA are supported only with RMXs with MPMx
cards.
● Following requests sent by CMA and RealPresence DMA system, the Collaboration Server will send
the number of occupied resources for a conference or total for the MCU.In Flexible Resource
Capacity Mode, CMA/DMA receive information about how many Video (CIF) and Audio resources are
occupied per conference or MCU according the request type sent by the CMA and DMA.
● Occupied resources are resources that are connected to ongoing conferences. Disconnected
endpoints in an ongoing conference are not counted as occupied resources.
Polycom®, Inc.
Number of Participants
per RTM ISDN Card
T1
40 If the conference bit rate is 128Kbps, participants connecting at bit
rates lower than 128Kbps are disconnected.
40
If the conference bit rate is above 128Kbps but does not match
40
any of the bonded bit rates, participants are connected at the
40
highest bonded bit rate that is less than the conference bit rate.
For example: If the conference bit rate is 1024Kbps, the
34
25
17
11
9
8
6
participant is connected at 768Kbps.
Administration and Utilities
692