How can I determine if I have a defective Cobos family Device Server like UDS, SDS, Micro125 or XPress-DR?

Cobos Family Device Server Troubleshooting and Recovery

Many issues that appear to be caused by a defective product are actually due to configuration or firmware issues. Before replacing the unit please try the two recovery procedures detailed below:

In the following note the ‘device server’ can be a UDS, SDS, Micro125, or Xpress DR.

1. Serial access to Setup Mode

Use terminal emulation software (HyperTerminal, Teraterm, ...) on the serial port of the device server to enter the setup mode :

1. Connect a computer running a terminal emulation software to your device server serial port. The default serial port settings are 9600 baud, 8 bits, no parity, 1-stop bit, no-flow control.

2. Reset the unit, either by pushing the reset button, or cycling the unit's power (power off and back on). The self-test will begin.

3. You have one second to enter three lowercase x characters (xxx).

The easiest way to enter Setup Mode is to hold down the x key at the terminal emulation software while resetting the unit.

If you can enter Setup Mode:

1. set the unit to factory default settings

2. set IP settings (in server menu)

3. save and exit.

Now you can do the bidirectional test below in order to confirm that the device server is working properly.

If you can’t enter the Setup Mode it means that this device server has a problem. The firmware recovery procedure below should help you to recover the device server.

2. Bidirectional test

1. Connect a computer running terminal emulation software to your device server serial port. The default serial port settings are 9600 baud, 8 bits, no parity, 1-stop bit, no-flow control.

2. Start a 2nd terminal emulation window but this time open it on an IP socket, e.g. in HyperTerminal open a Winsock connection. The IP address is the IP of your device server and port number is 10001 by default.

3. Every character typed in one terminal emulation window should appear in the other terminal emulation window and vice versa. In other words, characters typed in the "serial" terminal will be displayed in the "IP socket" terminal and characters typed in the "IP socket" terminal will be displayed in the "serial" terminal.

If you can’t enter the Setup Mode or can’t achieve the above bidirectional test it means that this device server has a problem. The firmware recovery procedure in the next section should help you to recover the device server.

3. Firmware recovery with Device Installer

Use LANTRONIX DeviceInstaller,availabld for download at the link below:

Latest version of DeviceInstaller

1. Connect your device server to the serial port of the PC with the DeviceInstaller.

2. In the DeviceInstaller, go into "Tools" menu, then "Advanced" and click on "recover firmware"

3. Select the com port, the Device Model, and the firmware file.

4. Click OK and restart the device server. After a few minutes the firmware should be recovered and the device server should work properly after another reset.

If you can’t do a successful firmware recovery AND can’t enter the setup mode then the device server is defective. Please contact your Lantronix reseller to ask for a replacement unit, he will tell you if the defective device server is still covered by warranty.

[Originally Published On: 01/25/2006 11:20 AM]

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