  nmsEponOnuSerialPort | | .1.3.6.1.4.1.3320.101.27 |
 nmsEponOnuSerialPortTable  | mandatory | .1.3.6.1.4.1.3320.101.27.1 |
 nmsEponOnuSerialPortEntry | mandatory | .1.3.6.1.4.1.3320.101.27.1.1 |
 llidIfIndex | mandatory | .1.3.6.1.4.1.3320.101.27.1.1.1 |
| onuSerialPortDataReadBytes | mandatory | .1.3.6.1.4.1.3320.101.27.1.1.10 |
| onuSerialPortBufferRowStatus | mandatory | .1.3.6.1.4.1.3320.101.27.1.1.11 |
| onuSerialPortKeepaliveMode | mandatory | .1.3.6.1.4.1.3320.101.27.1.1.12 |
| onuSerialPortKeepaliveIdle | mandatory | .1.3.6.1.4.1.3320.101.27.1.1.13 |
| onuSerialPortKeepaliveTimeout | mandatory | .1.3.6.1.4.1.3320.101.27.1.1.14 |
| onuSerialPortKeepaliveProbeCount | mandatory | .1.3.6.1.4.1.3320.101.27.1.1.15 |
| onuSerialPortKeepaliveRowStatus | mandatory | .1.3.6.1.4.1.3320.101.27.1.1.16 |
| onuSerialPortLoopback | mandatory | .1.3.6.1.4.1.3320.101.27.1.1.17 |
| onuSerialPortSeqNo | mandatory | .1.3.6.1.4.1.3320.101.27.1.1.2 |
| onuSerialPortSpeed | mandatory | .1.3.6.1.4.1.3320.101.27.1.1.3 |
| onuSerialPortDataBits | mandatory | .1.3.6.1.4.1.3320.101.27.1.1.4 |
| onuSerialPortHaltBits | mandatory | .1.3.6.1.4.1.3320.101.27.1.1.5 |
| onuSerialPortParity | mandatory | .1.3.6.1.4.1.3320.101.27.1.1.6 |
| onuSerialPortFlowControl | mandatory | .1.3.6.1.4.1.3320.101.27.1.1.7 |
| onuSerialPortPropRowStatus | mandatory | .1.3.6.1.4.1.3320.101.27.1.1.8 |
| onuSerialPortDataReadInterval | mandatory | .1.3.6.1.4.1.3320.101.27.1.1.9 |