I'm not clear on what you are trying to achieve. If you mean can you configure hardware conferencing on an MGCP gateway then the answer is yes providing you have the available resources in your gateway and the correct IOS featureset.
The number of participants is controlled by a service parameter, the exact one escapes me at the moment but have a look in the ccm service and/or IP voice media streaming service.
MGCP or H323 have nothing to do since the HW CFB is handled with SCCP.
so, SCCP is a master-slave protocol. If the questions is: can i do conferencing without CCM?? answer is no, just as trying to use a phone without CCM. no master
also if you want to use HW CFB using PVDM and PVDM2 the maximum number of users is set to 8 per conference (number of sessions change depending on codec complexity), cannot be changed due to HW limitations on DSP. a 6608 or a CMM can handle up to 16 users per conference because they use different DSP resources.
If you need more than that configure a SW CFB and XCODERs
These are the paths to get to each CCX logs through CLI. They may be helpful if you are having issues accessing RTMT or downloading logs through it.
If you want to download them you have to prefix "file get " and you can add one of the options (re...