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Polycom RealPresence Collaboration Server (RMX) 1500/2000/4000 Administrator’s Guide
21-10 Polycom, Inc.
Video/Voice Port Configuration
The Video/Voice Port Configuration enables you to configure the resources per resource type
and if in MPM+ or MPMx System Card Configuration Mode, select the Resource Capacity
Mode.
Flexible Resource Capacity Mode
All resources are initially allocated as CIF video ports as it is a resolution commonly
supported by all endpoints.
The administrator can allocate some or all of these resources as Voice resources and let the
system allocate the remaining Video resources automatically as participants connect to
conferences. The number of resources automatically allocated by the system resources per
endpoint is according to the participant’s endpoint type, capabilities and line rate.
Flexible Resource Capacity mode is available and is the default selection in both MPM, MPM+
and MPMx System Card Configuration Modes. It is the only allocation method in MPM System
Card Configuration Mode.
Fixed Resource Capacity
Fixed Resource Capacity enables the administrator to configure in advance the maximum
number of resources available for participant connections per video resolution and Audio
Only connections. In Fixed Resource Capacity mode, the system is always in a known state,
and when used in conjunction with the Resource Report, it gives the administrator precise
control over resource allocation and optimization. Fixed Resource Capacity mode is available
only in MPM+ and MPMx System Card Configuration Modes.
If all resources configured to a specific video resolution are in use and an endpoint tries to
connect to the MCU with that resolution, the MCU first attempts to connect the endpoint
using resources of the next highest resolution level. If no resources are available at that level,
the MCU tries to connect the endpoint using resources of progressively decreasing
resolutions.
Example: In a system that has 10 SD ports allocated and in use, If another SD endpoint
(11th) attempts to connect, the system first tries to allocate resources to the SD endpoint first
from HD720 and then from HD1080 resources.
If HD resources are allocated to an SD endpoint, HD endpoints may experience a resource
deficiency when trying to connect and may not be connected at HD resolution.
If there are no available HD resources the system tries to allocate resources to the SD
endpoint from any available CIF resources.
If there are no available CIF resources the system tries to allocate resources to the SD
endpoint from any available Audio Only resources. If Audio Only resources are allocated the
HD endpoint, the participant receives an “Audio Only” message from the Conference/Entry
Queue IVR Service and is connected as an Audio Only participant.
To enable SVC-based conferencing, use the Flexible Resource Capacity Mode. SVC-based
conferencing is not supported with Fixed Resource Capacity
If the system runs out of voice ports, voice endpoints cannot connect to available video ports.
Conversely, video endpoints cannot connect to available voice ports.