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MCU Management
Polycom, Inc. 126
Note: RealPresence Resource Manager integration and MCU pools
If you have a Polycom RealPresence Resource Manager system that uses the RealPresence DMA
system API to schedule conferences on the RealPresence DMA system’s conferencing resources
(MCU pools), you must create MCU pools and pool orders specifically for the use of the RealPresence
Resource Manager system. The pool orders should be named in such a way that:
• They appear at the top of the pool order list presented in the RealPresence Resource Manager
system.
• Users of that system will understand that they should choose one of those pool orders.
If the RealPresence Resource Manager system is also going to directly schedule conferences on
MCUs that it manages, those MCUs should not be part of the conferencing resources (MCU pools)
available to the RealPresence DMA system.
Note: MCUs and ISDN gateway selection
MCU pools and pool orders are not used to select an ISDN gateway for simplified gateway dialing.
See ISDN Gateway Selection Process.
When a Polycom RealPresence Collaboration Server or RMX MCU is functioning as an ISDN
gateway, each call through the gateway consumes two ports, one for the ISDN side and one for the
H.323 side. The ports used for gateway calls aren’t available for conferences, so gateway operations
may significantly reduce the available conferencing resources.
Note: MCU support
The Polycom RealPresence DMA system supports the use of Cisco Codian 4200, 4500, and MSE
8000 series MCUs as part of the Conference Manager’s conferencing resource pool, but their Media
Port Reservation feature is not supported. This feature must be set to Disabled on Cisco Codian
MCUs in order to use them as part of the Conference Manager’s conferencing resource pool.
The Polycom RealPresence DMA system supports the use of Polycom MGC MCUs, but not as part of
the Conference Manager’s conferencing resource pool. They can register with the Call Server as
standalone MCUs (dialed by IP or prefix) and/or ISDN gateways. Their model designation is Polycom
MGC gateway, even if being used as standalone MCUs.
Note: MCU connections
In order to efficiently manage multiple calls as quickly as possible, the Polycom RealPresence DMA
system uses multiple connections per MCU. By default, a RealPresence Collaboration Server or RMX
MCU allows up to 20 connections per user. We recommend not reducing this setting (the
MAX_NUMBER_OF_MANAGEMENT_SESSIONS_PER_USER system flag). If you have a
RealPresence DMA supercluster with three Conference Manager clusters and a busy conferencing
environment, we recommend increasing this value to 30.