To get the stick running with mikrotik routeros it’s mode has to be changed to serial modem.
I do this with my ubuntu 14.04 workstation.
First install usb-modeswitch and minicom:
aptitude install minicom usb-modeswitch
Now plug in your stick configure the ip-address of the usb network interface. We also have to set the ProjectMode via http request.
ifconfig ethx 192.168.1.2 netmask 255.255.255.0
Afterwords fireup minicom and change modem to modem mode (turn off hardware flow control)
minicom -D /dev/ttyUSBx
Paste the following code to minicom terminal
When you plug in the stick to the routerboard now you get an pppx dialer interface.