Anyone using a Drytek "V" router as a FXO?

I am looking for an FXO for my FPBX to connect to my analoug line, I have a DrayTek 2830N and was thinking of upgrading to a 2830Vn and being able to route calls to and from the PSTN to/from asterisk.

Has anyone used a Draytek like this?

Rob