Hi,
i had the same problem like XorA with a Fujitsu Siemens (FSC) connect2air card, these card is identical with the rtm-8000.
Output of cardctl ident:
product info: "GPRS Modem", "GPRS", "", ""
manfid: 0x0279, 0x950b
function: 2 (serial)
At the moment, i have the angstrom-distribution with a kernel version 2.6.22. The card is recognized as uart 16950/954, but in this configuration, minicom did not react to some commands. Then i read that this card is a uart 16550A, i changed this with setserial and then i could send commands in minicom. But the connection to the internet didn't work, and i had the output like XorA. In kernel version 2.4, there are no problems with this card and the uart 16550A. After two days search, i found this
http://www.webservertalk.com/archive216-2005-2-865933.html. There i read that you must set the uart to 16750. I did this and the connection was established.
Ok you must do the following: put the card in your zaurus, my device ist the ttyS4, and then type
setserial /dev/ttyS4 uart 16750
pccardctl reset
pccardctl reset is important, i forget it always and i wonder why does not work. Ok the thread is a little bit older but i hope i could help you, this is my first answer in this forum, sorry for my bad english
bye martin