User guide

Installing and Activating AirLink GX400
Rev 1.0 Jun.11 29
Serial Port
Figure 3-5: Serial cable
The serial port of your AirLink GX400 can be connected directly to most
computers or other devices using a standard straight through cable. If you have a
DCE device, you will need a null device or null device cable. All local GPS (UDP
encapsulated) reports will come over the Ethernet connection. The serial port is
available for both initial product configurations and debugging.
USB OTG Port
Figure 3-6: USB Micro-A connector cable
The CPU OTG port operates in device mode; when the port is unused, the AirLink
GX400 operates in device mode. If a Micro-B plug is inserted into the port, AirLink
GX400 operates as a self-powered device: it will not draw any current from the
USB. If a Micro-A plug is inserted, the AirLink GX400 can operate in host mode
and supply power to the device that is plugged into. At this time, however, USB
host capability is a future ALEOS enhancement.
Your AirLink GX400’s high-speed (480 Mbps) USB 2.0 port can be directly
connected to computers or other devices using a standard USB 2.0 cable. If the
computer or device you are connecting or the cable is not rated for high-speed,
the device will communicate at a reduced speed to match.
When it is connected to a computer in device mode, the USB port should be seen
as a COM port or Ethernet port after the applicable driver is installed and
configuration has been enabled. The port is, by default, a virtual Ethernet port.