How to configure a pnpisa modem in the new QNX RTP...

I have a 3COM/USR pnp modem along with a serial mouse on my system. After
boot, the only serial device in dev is ser1(mouse). I have looked at the
enum-devices and enum-pnpisa stuff but I do not really understand what I
need to do to set that modem up…any ideas or info would be appreciated!