TransPort WR41 hardware
Digi TransPort User Guide 51
9. SIGNAL LEDs: Indicate strength of cellular signal.
• 3 LEDs: Excellent
• 2 LEDs: Good
• 1 LED: Fair
• 0 LEDs: Poor or No signal
10.SERIAL LED: Illuminates steady if a terminal is connected to the SERIAL port and the DTR 
signal is on. Flashes when data is transmitted or received.
11.Primary Wi-Fi antenna connector (Wi-Fi models only): This SMA connector is used to 
connect the router’s primary Wi-Fi antenna.
12.SIM / R-UIM Sockets (SIM card models only): SIM 1 and SIM 2 are for use with the Subscriber 
Identification Module(s) (SIMs) or Removable User Identification Module(s) (R-UIMs).