Routers and bridges were available to connect LocalTalk to Ethernet and Token Ring ranging from the Shiva FastPath down to little ones like the Farallon or Dayna Mini-EtherPrint that I use to connect my LocalTalk segment to Ethernet. Routers set up separate zones for each port. Bridges like the EtherPrint have both groups in the same zone. Yes indeed, Shiva was the big noise in Apple networking. Smaller players like Nuvotech always had to test compatibility with Shiva's NetModem, NetSerial, and the big guns like the FastPath.

My big network problem right now is that Apple doesn't support AppleTalk any more.