The way we provided SLIP/PPP via phone lines to our home PCs
was by a combination software/hardware solution.
Software : SLIP via WRQ Connect/3000
or PPP via Windows/95
Hardware : Livingston Portmaster attached to our LAN.
We attached our office modems to the portmaster instead of
to the hp3000s DTC. For more details check out the article
in our 'What's Up Doc?' newsletter.
http://www.robelle.com/newsletter/w1995-04.html#SLIP
/paul