DSL Embedded :: Serial access?

Is there a way to get at serial ports and/or modems (or USB serial ports) from within DSL Embedded? I'd like to setup a ppp server with about 2 or 4 dialin lines, but don't want to dedicate a whole box just for this. Would be handy to just have it all from within QEMU/DSL. Unfortunarely, at the location, we only have a couple of windows boxes, which I don't want to install a ppp server on.

original here.