Sierra Wireless AirLink GX400 Modem Installation Guide
2
876-0238-000 Rev A1
Front Panel
The following are located on the modem’s front panel:
Rear Panel
Your setup will use only the following ports on the rear panel.
Reset button
Press to reset the modem using its current settings. Press and hold for 10 seconds to reset the modem
to its factory defaults. When you press the reset button all LEDs display solid red.
LEDs
Modem status indicators
Network
Red (solid)
Red (flashing)
Yellow (solid)
Yellow (flashing)
Green (solid)
Green (flashing)
No cell network
Attempting to connect to cell network
Cell network found, modem attempting to connect to network
Cell network not available
Connected to the cell network
Device in roaming mode
Signal (cellular network’s signal)
Red (solid)
Red (flashing)
Yellow (solid)
Green
Bad signal
No signal
Marginal signal
Good signal
Activity
Off
No activity of transmitting or receiving
Power
Off
Green (flashing)
Red (solid)
Yellow (solid)
Green (solid)
Green w/ yellow flash
No power or input voltage detected
36 VDC or
9 VDC
Radio is transmitting or receiving
Device is not operational (Low power mode)
Device is entering low power mode or system is booting
Device is connected to correct voltage and operating correctly
Device had GPS fix
Cellular port
Connect cellular antenna cable
GPS port
Connect GPS cable antenna
Diversity/AUX port
Not used in this installation
USB port
Connect directly to laptop via USB cable to configure modem (AgJunction does not provide the
cables or software for this functionality—contact Sierra Wireless for more information)
Serial port
Connect directly to laptop via serial cable to configure modem (AgJunction does not provide
the cables or software for this functionality—contact Sierra Wireless for more information)
Ethernet port
Connect AgJunction Link or other components for communication to this port
DC Power
Connect gray power cable
Note: Non-WiFi version shown at left. WiFi
version includes antenna port on front of unit
with detachable antenna—see page 1 for photos
of port.