| Light | State | Meaning |
| LAN | Off | NCD has no power or is not connected to a modem/router. |
| Blue | Successful connection between NCD and modem/router. Flashing indicates local network activity. |
| Amber | Successful connection between NCD and modem/router. Flashing indicates local network activity. |
| DSL | Off | NCD has no power or is not communicating with the NBN™ access network. |
| Blue | NCD is successfully communicating with the NBN™ access network. |
| Connection | Off | NCD has no power. |
| Blue | Successful reverse power to NBN™ equipment outside the premises. |
| Red | Issue with reverse power. Please call Summit Support 1300 049 749 for assistance. |
| Power | Off | NCD has no power. |
| Blue | NCD has power. |