This counter tracks octets output by this specific module after processing, since the last reboot. As with the packet-level pair, comparing this to ccaAcclInOctets for the same row lets an admin see per-module encryption overhead, like IPsec padding, or spot a module that's silently losing data volume during processing. A module consistently showing output noticeably lower than its input, beyond what protocol overhead would explain, would be a specific module worth flagging for hardware diagnostics.