Beaglebone - issue with connection


I have some issues with BeagleBone.

HW revision of my beaglebone is C2, so I think this A5 BeagleBone.

I tried to install SDK and CCS to Ubuntu 12.04 running on VirtualBox.

As I read in ‘Sitara Linux Software Developers’s Guide’ after
connection board to PC, I can run ‘ls /dev/ttyUSB*’ and then have to see:


But I have only ttyUSB0. Is this ok?

‘lsusb’ results in:
Bus 001 Device 006: ID 0403:6010 Future Technology Devices International, Ltd FT2232C Dual USB-UART/FIFO IC
Bus 001 Device 007: ID 1d6b:0104 Linux Foundation Multifunction Composite Gadget
Bus 002 Device 002: ID 80ee:0021 VirtualBox USB Tablet
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

The first and the second belong to BeagleBoard.

Best Regards,