The value of tmnxBsxCflowdStatusHCUSupSSRCSt indicates the
number of synchronization source (SSRC) records which had to
be aborted (due to reasons such as unknown codec type,
non media stream, codec switch, etc).
This value applies only when the index tmnxBsxCflowdExpType
has a value of 'rtpPerformance(3)' and is otherwise zero.