Polycom (RMX) 1500 User Manual

Chapter 4-Additional Conferencing Information

Polycom, Inc.

In the MCMS_PARAMETERS tab, double-click the MIN_H239_HD1080_RATE entry.

The Update Flag dialog box is displayed.

In the Value field, enter the minimum line rate at which HD1080 Resolution Content will 

be enabled.
—

Enter 0 to disable this flag and prevent HD Content from being used. 

Click OK to confirm and exit the Update Flag dialog box.

Click Close to exit the System Flags dialog box.

The RMX can be configured to send Content to H.323/SIP/ISDN endpoints that do not 
support H.239 Content (legacy endpoints) over the video (people) channel, allowing the 

participants using legacy endpoints to view Content instead of the other conference 

participants. 

•

This option is enabled in MPM+ and MPMx Card Configuration Modes only.

•

This option is valid when sending Content as a separate stream is enabled in the System 

Configuration and the flag: ENABLE_H239 is set to YES. 

•

An Additional video resource is allocated to the conference when Content is sent to 

legacy endpoints:
—

In MPM+ mode, one SD video resource. 

—

In MPMx mode, one HD video resource.

The allocation is done only when a legacy endpoint is connected to the conference and a 

Content session is initiated and transmitted via the video channel. Once the resource is 

allocated, it remains allocated to the conference until the conference ends. 
If the system cannot allocate the resource required for sending the Content, the 

conference status changes to “Content Resource Deficiency” and Content will not be 

sent to the legacy endpoints.