User's Manual

Table Of Contents
GlobalTrak ™ GT Lite Operation and Maintenance Manual
4.3 Connect GT Lite to HyperTerminal
After installing drivers and creating a HyperTerminal connection, it is possible to connect GT
Lite to a host PC. The steps below outline the method for establishing a host connection over
USB. However, it is also important to understand what makes these steps necessary.
When GT Lite is powered off, in a sleep mode, or in the process of rebooting, the connection
over USB is internally disconnected. When this happens the PC will likely play the ‘disconnect
USB’ notification sound. When the GT Lite powers up (from off state, sleep, or coming out of
reboot), it reestablishes the USB connection. At the time when the USB connection is
established, it is essential for HyperTerminal to be disconnected from USB COM port. Only
after the USB connection is established can the COM port be successfully opened by clicking
the ‘Call’ button in HyperTerminal.
Due to the nature of USB drivers and HyperTerminal there are also times when this procedure
is followed correctly and the connection looks to be established, but no text is displayed in the
terminal window. In this case it is necessary to disconnect the COM port connection in
HyperTerminal and reboot the device.
23. Open the GT Lite HyperTerminal Connection.
24. When HyperTerminal warns that the COM port cannot be opened, click OK.
25. Power off GT Lite if it is on.
26. Ensure HyperTerminal is disconnected from the COM port.
27. Power on GT Lite.
28. Wait for the USB device to connect. This usually takes about 5 seconds. Windows will
play the USB connect notification sound when it is done.
29. Click the ‘Call’ button on HyperTerminal.
30. If HyperTerminal is unable to connect to the COM port, go back to step 25.
31. Type a character and press enter to ensure the connection is correctly made.
32. If the character is not echo’d back in the HyperTerminal session, click the Disconnect
button in HyperTerminal and go back to step 3.
33. GT Lite is now connected to HyperTerminal and commands can be issued. If characters
stop echoing to the terminal or the device disconnects from USB, go back to step 25.
Prepared: R. Straz Date: July 25, 2007 Page 55 of
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