Polycom RealPresence Collaboration Server (RMX) 1500/2000/4000 Administrator’s Guide
21-20 Polycom, Inc.
Table 21-7 lists the ISDN supported bit rates and their respective participant connection
capacities per RTM ISDN card:

RMX Resource Management by CMA and DMA

When both CMA and DMA are part of the solution, following a request by the CMA and
DMA, the RMX will send updates on resource usage to both CMA and DMA, with each
application updating its own resource usage for the RMX. This provides better management
of the RMX resources by CMA and DMA.
Guidelines
• Resource usage updates from RMX to the CMA and DMA are supported only with
RMXs with MPM+ or MPMx cards.
• Both Flexible Resource Capacity™ and Fixed Resource Capacity™ modes are supported
with DMA.
•Only Flexible Resource Capacity™ mode is supported with CMA.
• Following requests sent by CMA and DMA, the RMX will send the number of occupied
resources for a conference or total for the MCU, according the Resource Capacity Mode
used by the system.
Table 21-7 ISDN – E1/T1 Connection Capacity vs. Bit rate
Bit Rates
(Kbps)
(Bonded)
Number of Participants
per RTM ISDN Card
E1 T1
128 40 40 If the conference bit rate is 128Kbps, participants
connecting at bit rates lower than 128Kbps are
disconnected.
If the conference bit rate is above 128Kbps but does
not match any of the bonded bit rates, participants are
connected at the highest bonded bit rate that is less
than the conference bit rate.
For example: If the conference bit rate is 1024Kbps,
the participant is connected at 768Kbps.
192 40 40
256 40 40
320 40 40
384 34 34
512 25 25
768 17 17
1152 11 11
1472 9 9
1536 8 8
1920 7 6