RMX 2000 Administrator's Guide Version 7.6.1 - Polycom

ISDN/PSTN
Chapter 20-RMX Administration and Utilities
The RMX 1500 supports one ISDN card with 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.
On RMX 1500/2000/4000, E1 and T1 connections cannot be used simultaneously.
Table 20-7 lists the ISDN supported bit rates and their respective participant connection
capacities per RTM ISDN card:
Table 20-7 ISDN – E1/T1 Connection Capacity vs. Bit rate
Bit Rates
(Kbps)
(Bonded)
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
E1 T1
Number of Participants
per RTM ISDN Card
128 40 40 If the conference bit rate is 128Kbps, participants
192 40 40
connecting at bit rates lower than 128Kbps are
disconnected.
256 40 40
If the conference bit rate is above 128Kbps but does
320 40 40 not match any of the bonded bit rates, participants are
384 34 34
connected at the highest bonded bit rate that is less
than the conference bit rate.
512 25 25
For example: If the conference bit rate is 1024Kbps,
the participant is connected at 768Kbps.
768 17 17
1152 11 11
1472 9 9
1536 8 8
1920 7 6
• 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.
Polycom, Inc. 20-19