The Bluesolei doesn't work because it has some strange "hum.. I'm going to switch the COM port now... would be fun" behaviour.
Basically, the DialUp is just another "serial port" which has to be used while the real serial port is blocked by mRouter.
Have a look at the GnuBox project (http://gnubox.dnsalias.org/gnubox/).
Some guy was getting PhoCo to work with it.