There are transceivers available, I have priced them from Black Box and
a couple of other places.
You can now get hubs with 4 or 8 10-base-T connectors, and a coax BNC
connector on the back.
We bought several of these, they were cheaper than transceivers!
You might need a crossover cable to connect the hub into your network;
one of ours included this, another had an extra socket for "cascade"
connection that provided the same function.
Last time I asked there was no Novell software for HP Pascal, and
none expected.
BD's FACSnet software gives ftp file transfer capability, but as far
as I know can only communicate in the TCP/IP network protocol.
That means at least one of your Novell machines will need to be
configured for TCP/IP and ftp to bridge between the HP and the Novell
network.
Best of Luck, Joseph.
-- Joseph Webster Flow Cytometry Facility Centenary Institute