Solution:
You must place the IOLAN+ in the same LAN as the TFTP host. The TFTP host can be a Unix server or a Windows server. Before you begin, download current IOLAN+ firmware from the Perle WEB site: http://www.perle.com/downloads/serial.html
Copy the IOLAN firmware file to your TFTP host.
Power OFF the IOLAN+.
Attach a Terminal to serial Port 1 of the IOLAN+.
Set the Terminal for 9600 baud, 8 data bits, no parity, stop bit. You can also use a PC instead of a Terminal. Use Hyperterminal on the PC. Configure Hyperterminal for the same settings.
10MB Iolan+ units:
a. On the rear of the IOLAN+ is a black gromet covering a hole. Remove it if one exists. You will notice a miniature switch inside the hole.
b. Use a pen or pencil and use it to depress and hold in the switch. The older models have enough room to be able to push the switch in using your finger.
c. Power on the IOLAN+ but continue holding the switch until a menu appears on the terminal screen.
10/100MB Iolan+ units:
a. Type Control + "b" five times while the unit is booting up when the Network LED is flashing.
The menu should appear. Select the following menu options.
4. Download.
2. Ethernet interface.
The terminal server ethernet address is currently - xx:xx:xx:xx:xx:xx
Do you wish to change this? (n)
The Server IP address is currently:
Do you wish to change this? (Y) enter an IP address for your IOLAN+ terminal server.
Enter download host IP address: enter the IP address of your TFTP server.
Enter the download file name (full path): see note 1
NOTE 1:
If using Unix TFTP then specify the full path and file name of the IOLAN firmware file.
If using Windows TFTP then specify only the file name of the IOLAN firmware.
Lastly, press the enter key to begin downloading the IOLAN firmware file.
The above steps should recover your IOLAN+ and allow it to boot up to the login prompt.