Matthew Russotto wrote: (localtalk snip)
Shielded twisted pair with a 3-conductor round plug (one conductor unused). Sometimes called DIN-3, I don't know if they really are. The Localtalk boxes were self-terminating (mechanically removing the connectors connected up the terminator); PhoneNet required an extrernal terminator.
Mini-DIN3, as the other Apple connectors are others in the mini-DIN series. -- glen