By the way, those of you wishing to play around with FDDI optical networks on NuBus Macs, check this address:

http://tinyurl.com/7d8lezf

They still have some Cabletron F6069 cards + daughtercards listed.

The base card is

Cabletron Nubus MMF FDDI Interface Card F6069 • SKU: 715001397-11

the other one is daughtercard that adds second optical port

Cabletron Nubus MMF DAS FDDI Interface Card F6069-DAS • SKU: 715001398-11

Picture of the base card is in my post

http://68kmla.org/forums/viewtopic.php?f=16&t=17198

Here's one interesting article from the past that mentions FDDI on Macs:

http://www.opus1.com/www/jms/mw-fastlane.html

And if you wish to connect it to PCI Mac, here's my post about another great FDDI card that works on a Mac (Feb. 2010):

http://68kmla.org/forums/viewtopic.php?p=124319#p124319