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Chapter 5-Cascading Conferences
Polycom, Inc. 5-35
rate of the IP Only HD Video Switching conference running on the MGC. In such
case, the conference can include IP Only participants.
— H263_ANNEX_T=YES (default)
This flag enables/disables the use of Annex T with H263. Set it to NO if the
endpoints connecting to the conference do not support this mode. In such a case,
you must also change the MGC flag ENABLE_H239_ANNEX_T setting to NO.
— FORCE_1X1_LAYOUT_ON_CASCADED_LINK_CONNECTION=YES
(default).
Set this flag to NO If the MGC is functioning as a Gateway and participant layouts
on the other network are not to be forced to 1X1.
3 If the MGC is dialing the RMX and the cascaded link connects to the conference via the
Cascade-enabled Entry Queue without being prompted for the conference password,
set the flag to YES as follows:
— ENABLE_CASCADED_LINK_TO_JOIN_WITHOUT_PASSWORD=YES
4 Click OK.
5 Reset the MCU to apply the changes.
Setting Flags in the MGC
Flag setting is required to ensure the correct MCU behavior for cascading conferences. It is
performed once per MCU.
To modify the flags:
1 In the MGC Manager, right-click the MCU icon and then click MCU Utils>Edit
“system.cfg”.
2 In the H264 Section, ensure that the following flags are set to:
— ENABLE_HD_SD_IN_FIXED_MODE=YES
Setting this flag to YES enables H.264 Standard Definition (SD), High Definition
(HD) and VSX 8000 (Version 8.0) support in Video Switching conferences.
— H264_VSW_AUTO=NO
Setting this flag to NO disables the highest common mechanism in H.264 and
enables the selection of H.264 Video Protocol in fixed mode in Dual Stream Video
Switching cascading conferences.
— ENABLE_H239_ANNEX_T=YES
This flag should be set to the same value (YES/NO) as the settings of the RMX flag
H263_ANNEX_T
3 Click OK.
4 If you changed the flags, reset the MCU.
If the flag MIX_LINK_ENVIRONMENT is set to YES, the IP_LINK_ENVIRONMENT flag must be set
to NO.
If the flag MIX_LINK_ENVIRONMENT is set to NO, the IP_LINK_ENVIRONMENT flag must be set
to YES.
To use MIH Cascade in the MGC, the Conference Numeric ID routing mode must be used. It is
determined when the system.cfg flag in the GREET AND GUIDE/IVR section is set to
QUICK_LOGIN_VIA_ENTRY_QUEUE=NO.