Administration and Utilities
Polycom®, Inc. 708
ISDN/PSTN
RMX 1800 with 3 DSP cards with built-in ISDN supports 4 E1/T1 PRI lines.
On the RMX 2000/4000 a maximum of two RTM ISDN cards are supported, each providing connection for
up to either 7 E1 or 9 T1 PRI lines.
E1 and T1 connections cannot be used simultaneously.
The following table lists the ISDN supported bit rates and their respective participant connection capacities
per RTM ISDN card:
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
MCU Resource Management by RealPresence Resource Manager, and
Polycom RealPresence DMA System
When the RealPresence Resource Manager, and Polycom RealPresence DMA system are part of the
solution, following a request by the RealPresence Resource Manager and Polycom RealPresence DMA
system, the MCU will send updates on resource usage to the DMA, which updates its own resource usage
for the MCU. This provides better management of the Collaboration Server resources by the RealPresence
Resource Manager, and Polycom RealPresence DMA system.
RMX 2000/4000 ISDN – E1/T1 Connection Capacity vs. Bit rate
Bit Rates
(Kbps)
(Bonded)
Number of Participants per RTM ISDN Card
E1 T1 Type
64 120 92 Voice / PSTN
128 40 40
Video
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
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