DMA OperationsGuide MCUs
132 Polycom, Inc.
Every conference room (VMR) is associated with an MCU pool order. The
pool(s) to which an MCU belongs, and the pool order(s) to which a pool
belongs, are used to determine which MCU is used to host a conference. See
“MCU Pools” on page 152 and “MCU Pool Orders” on page1 56.
Note
If you have a Polycom RealPresence Resource Manager system that uses the
DMA system API to schedule conferences on the 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 DMA system.
Note
MCU pools and pool orders are not used to select an ISDN gateway for simplified
gateway dialing. See “ISDN Gateway Selection Process” on page 147.
When a Polycom 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
The Polycom 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 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 and/or ISDN gateways.
Note
In order to efficiently manage multiple calls as quickly as possible, the Polycom
DMA system uses multiple connections per MCU. By default, an 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 DMA supercluster with three Conference Manager clusters and a busy
conferencing environment, we recommend increasing this value to 30.