DOCSIS-CMTS-CM-US-OFDMA-STATUS is an IPDR Service Definition Schema for monitoring the OFDMA upstream channel status of the CM as perceived by the CMTS. Revision History: 3.5.1-B.1 Initial version. DOCSIS 3.1 CCAP Operations Support System Interface Specification CCAP-OSSIv3.1-N-15.1390-1 The IPDR Record containing one OFDMA upstream status instance of a single cable modem.