Handspring Visor Prism/Platinum -> Linux ppp sub-mini-howto
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11/04/2000 Miles Lott <milos@insync.net>

Linux ppp script:
#/usr/sbin/pppd /dev/ttyUSB1 230400 192.168.1.3:192.168.1.10 local \
ms-dns 192.168.1.3 netmask 255.255.255.0 persist passive noauth debug \
nodeflate nobsdcomp noccp nopcomp proxyarp

Where .3 is the host machine and .10 is the Prism.

Linux (etc...):
I recommend running a caching DNS on the ppp host machine.  This is to
ensure that DNS lookups are not an issue when troubleshooting the connection.
The ppp script should be run after the Prism/Platinum is identified by the Linux
USB stack.  This should take under a second.  But, waiting up to 3 seconds may
be applicable.
If your ppp host is behind a firewall, make sure to add a return route for
the Prism so that return traffic can get to it:

#/sbin/route add 192.168.1.10 gw ip.addr.of.ppphost.ether eth0


Visor Network config (Prefs app - Network):

PPP connection, Query DNS, Automatic IP address.
No username/password required.

Visor Connection config (Prefs app - Connection):

Setup a new connection.
For the connection method, use USB to PC.
Use this connection profile in the network config above.