This Integer32 gives the finalized count of voice cells the ComPort's voice port received during the previous 15-minute period, mirroring on the receive side what stuVoiceChanStatsPrevTxVoiceCellCnt reports for transmit. As a closed receive-volume figure it's the denominator an admin needs to turn the previous period's CRC3 or lost-cell counts into a meaningful historical error rate. For example, comparing stuVoiceChanStatsPrevRxVoiceCellCnt against that period's CRC3 error count would show the historical received-cell error rate for a subscriber's voice line.