well done - it is interesting the roundabout approach to interacting with today's web (ethernet) - dialup made it easy to connect back then (do those even still exist?) - CompuServe, gopher, Bulletin Boards, and later Netscape - quite a time.
Funny enough, I still have POTS (plain old telephone service) to the house just so I can play with dial-up services once in a while.
dialup4less.com is one such provider that still operates in my area, and works with both LisaTerminal and Apple Data Modem 2400. Ethernet is just so much easier and more practical, though - if that word can even apply here. "Set it and forget it," so to speak.
Great work! Have you been successful in running anything other than MacWeb on your Lisa? Every other browser that I've tried crashes with a system error and I'm wondering if anyone else has had the same problem.
I've only tried two web browsers so far and they both work! MacWeb 2.0 and NCSA Mosaic 1.0.3. Here's a screenshot of the latter:
Not sure what's going on with the GIF artifact there, but surprised that it's showing an image at all. MacWeb does not, at least in its default configuration. Edit: I know that MacWeb needs about 2MB of free RAM to run, which I can just barely pull off with 4MB total system memory under 7.5.5. Are you running out of memory?