Digi TransPort WR31 User Manual page 73

Hardware
9 SIGNAL LED:
Cellular models: Indicate strength of cellular signal.
•
3 LEDs: Excellent
2 LEDs: Good
1 LED: Fair
0 LEDs: Poor or No signal
Models without cellular interface: Not operational.
•
10 SIM / R-UIM Sockets:
Cellular SIM card models only): Illuminates steadily when a valid SIM card is installed.
•
Models without cellular interface: Not operational or accessible.
•
Digi TransPort WR Routers User Guide
TransPort WR44 / WR44 R hardware
73