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Appendix H-Setting the MCU for Integration Into Microsoft Environment
Polycom, Inc. H-47
In some configurations, the following flags may require modifications when
MS_ENVIRONMENT flag is set to YES:
Setting the audio protocol for the Microsoft Client running on a single
core PC
By default, Microsoft Office Communicator R2 or Lync Clients are connected to conferences
using the G.722.1 audio algorithm. However, when these clients are hosted on single
processor workstations, they may experience audio quality problems when this algorithm is
used.
The System Flag FORCE_AUDIO_CODEC_FOR_MS_SINGLE_CORE is used to force the
use of a specific Audio algorithm such as G.711 when a Microsoft Office Communicator R2 or
Lync Client is detected as being hosted on a single core processor.
This flag can be set to:
• AUTO – No forcing occurs and the MCU negotiates a full set of Audio algorithm
during capabilities exchange.
Table H-2 Additional Microsoft Environment Flags in the MCU MCMS_PARAMETERS_USER Tab
Flag Name Value and Description
SIP_FREE_VIDEO_RESOURCES Default value in Microsoft environment: NO.
When set to NO, video resources that were allocated to
participants remain allocated to the participants as long as
they are connected to the conference even if the call was
changed to audio only. The system does not allocate the
resources to other participants ensuring that the participants
have the appropriate resources in case they want to return to
the video call.
The system allocates the resources according to the
participant’s endpoint capabilities, with a minimum of one CIF
video resource.
When this flag is set to YES, video ports are dynamically
allocated or released according to the in the endpoint
capabilities. For example, when an audio Only call is
escalated to Video and vice versa or when the resolution is
changed.
SIP_FAST_UPDATE_INTERVAL_
ENV
Default setting is 0 to prevent the MCU from automatically
sending an Intra request to all SIP endpoints.
Enter n (where n is any number of seconds other than 0) to
let the MCU automatically send an Intra request to all SIP
endpoints every n seconds.
It is recommended to set the flag to 0 and modify the
frequency in which the request is sent at the endpoint level
(as defined in the next flag).
SIP_FAST_UPDATE_INTERVAL_
EP
Default setting is 0 to prevent the MCU from automatically
sending an Intra request to Microsoft OC endpoints only,
every 6 seconds.
Enter the number of seconds in which the MCU automatically
sends Intra requests to Microsoft OC endpoints only.