Thanks. That did it. I can connect to the server from the Mac, and transfer files.

Now to see if I can get macipgw to compile...

Interestingly enough, the response from Asante (which took several days) is that (despite the labeling?) that only slow macintoshes can be on the LocalTalk side of the converter, or the connection won't be reliable. With what little I've done on that, I haven't seen a reliability issue, once I got netatalk configured correctly to support MacOS 7.6.