The value of tmnxCohOptPortModState indicates the state of the coherent optical module. reset - The MDIO (Management Data Input/Output) interface is held in a high impedance state and all module circuits are in low-power mode. init - The MDIO remains in high impedance and the module registers are initialized. lowPower - All high-power consuming circuits are in their low-power condition. highPowerUp - The module powers up all the functional circuitry and completes all required initialization of the module hardware. highPowerDown - The module powers down power-consuming circuitry that can be switched to a low-power state. txOff - The transmitter is turned off, but all other parts of the module remain high powered and functional. txTurnOff - The module turns off the network transmitter. txTurnOn - The module enables the transmitter. ready - The module is in a steady-state, ready for passing data. fault - A module fault has occurred and as a result the module is put into its low-power mode.