Yet another is the Applied Engineering QuadraLink serial card. According
to sources, the board was super easy to setup and use. It also appears
very solid as far as performance.
The AE QuadraLink card, like the CommCard and the Apple ports, can't do
both hardware handshaking and modem control at the same time. No hardware
patch kit will be developed for the AE card...
Shoot AF user davintosh a PM...he took pictures of one for the NuBus Mafia, so he might have the drivers for it.
...and if memory serves, he did not have them, but I will ask again...
--DDTM
A/UX supported it, see the A/UX FAQ:
from here
http://www.cs.uu.nl/wais/html/na-dir/aux-faq/part3.html search the page for QuadraLink