better late than never.
I am running it in a system without any gui. it is running debian squueze (6.0.6), asterisk 11.
all i had to do is:
-unclock the dongle and turn it to voice only
-plug it to the system (usb) and identify which port is using
-follow wiki.e1550.mobi/doku.php which has all the info from unlocking to working with the dongle.
the best dongle for the dongle is Huawei e169. As i mentioned earlier the system is without a gui. there are errors reported to systems with gui.