What is the maximum number of supported participants for a MeetMe conference?

32 is below the documented maximum; it may reflect the per-conference limit of certain lower-capacity conference bridge hardware but is not the CUCM MeetMe ceiling.

64 is not the documented maximum participant count; it falls below the supported limit of 128 participants for MeetMe conferences.

96 does not correspond to any documented CUCM MeetMe participant limit and is not a published threshold in Cisco conference bridge specifications.

Cisco CUCM documentation specifies 128 as the maximum participant count for a MeetMe conference, achievable when a hardware or software conference bridge resource with sufficient capacity is allocated to support that number of concurrent audio streams.