There are ten LED indicators on the CTM-500 wireless gateway.
...
LED | STATUS | DESCRIPTION |
|---|---|---|
Power |  | (solid) normal powered operation |
 | (flashing slowly) standby mode | |
 | (off) Device has no power | |
GNSS  | | (solid) valid position fix |
| (flashing slowly) no valid position fix | |
| (off) GNSS disabled | |
Wi-Fi  | | (solid) Wi-Fi enabled |
| (off) Wi-Fi disabled | |
MODE | | (solid) pass through mode enabled ETH0 |
| (flashing slowly) pass through mode enabled ETH1 | |
| (off) pass through mode disabled | |
IPSEC | | (solid) IPSEC ENABLED, and all tunnels CONNECTED |
| (flashing slowly) IPSEC ENABLED, not all tunnels are CONNECTED | |
| (off) IPSEC disabled | |
CONNECTION (cellular) |  | (solid) cellular connected |
 | (flashing quickly) cellular connecting | |
 | (flashing slowly) cellular not connected/idle | |
| (off) cellular connectivity disabled | |
TECH |  | (solid) 5G |
 | (flashing) 4G | |
| (off) no cellular registration | |
SIM 1 | | (solid) SIM1 selected and detected |
| (flashing slowly) SIM1 selected, NOT detected | |
| (off) SIM1 not selected | |
SIM 2 | | (solid) SIM2 selected and detected |
| (flashing slowly) SIM2 selected, NOT detected | |
| (off) SIM2 not selected | |
Cellular  |  | (solid or flashing) poor signal |
 | (solid or flashing) good signal | |
 | (solid or flashing) excellent signal |
...