| LED | OFF | ON | Flashing |
| SIM | LTE service (daemon) is not active
(disabled or not installed) | SIM is OK | Slow - No sim inserted (or SIM corrupted)
Fast - wrong PIN |
| NET | Not registered to LTE network | Registered to network | — |
| SIG | No signal | Excellent signal | Signal quality - faster ∼ better |
| INT | No WAN access | Unit online, backup active
(or single interface only) | Slow - connected via the primary WAN interface, backup inactive
Fast - connected via backup WAN interface |