connecting Huawei E173 to Beaglebone and using minicom

Thanks Alexander,
But where can I find the usb-modeswitch for Beagleone(angstrom) and how to install it?? do have an idea?

Nope - I have an old version here as source, it's just about a 1000 lines single .c file.

So you either need a cross-compiler or have gcc installed on your beagleboard.

Google finds several locations about this tool, for example this one:

http://www.draisberghof.de/usb_modeswitch/

A.

Thanks Alexander for the link,