LED | Color | Description |
|---|
| SYS | Yellow | FPGA download is complete. |
| | Green (blinking) | ROMMON is operational. |
| | Green (solid) | Cisco IOS is operational. |
| | Green (four blinks during bootup) | Reset button has been pushed during the bootup. |
| | Off | After powering up, when FPGA is being downloaded (in ROMMON). |
| ACT | Green | Network activity on FE switch ports, GE WAN port, 3G cellular interface, and serial interfaces. |
| | Off | No network connectivity. |
| WWAN | Green | Module is powered on and connected, but is not transmitting or receiving. |
| Green (slow blinking) | Module is powered on and searching for connection. |
| Green (fast blinking) | Module is transmitting or receiving. |
| Off | Module is not powered. |
| GPS - EHWIC | Green (solid) | GPS coordinates are obtained. |
| Off | GPS is disabled, GPS is enabled without GPS mode and NMEA configuration, or GPS is acquiring. |
| GPS - 819 ISR | Green (solid) | GPS coordinates are obtained. |
| Green (blinking) | GPS is acquiring. |
| Off | GPS is disabled or GPS is enabled without GPS mode and NMEA configuration. |
| RSSI | Green (solid) | Signal > -60 dBm Very strong signal |
| | Green (three blinks and then a long pause) | Signal <= -60 to 74 dBm Strong signal |
| | Green (two blinks and then a long pause) | Signal <= -75 to 89 dBm Fair signal |
| | Green (one blink and then a long pause) | Signal <= -90 to 109 dBm Marginal signal |
| | Off | Signal <= -110 dBm Unusable signal |
| SIM | Green / Yellow (one green blink followed by two yellow blinks) | SIM in slot 0 is active, SIM in slot 1 is not. |
Yellow / Green (one yellow blink followed by two green blinks) | SIM in slot 1 is active, SIM in slot 0 is not. |
| Off / Green (two green blinks and then a pause) | No SIM in slot 0, SIM present in slot 1. |
| Green / Off (slow single green blink and then a pause) | SIM present in slot 0, no SIM in slot 1. |
| Off / Off | No SIM present in either slots. |
| 3G/4G | Green (one blink and then a pause) | For 1xRTT, EGPRS, or GPRS service. |
| | Green (two blinks and then a pause) | For EVDO, EVDO/1xRTT, or UMTS service. |
| | Green (three blinks and then a pause) | For EVDO/1xRTT RevA, HSPA, or HSUPA/HSDPA service. |
| | Green (four blinks and then a pause) | For HSPA+ service. |
| | Green (Solid) | For 4G/LTE service. |
| | Off | No service. |
