I wondered about that.

In the ADT program itself it says before you hit the "Start Sending" button type:

(1) "IN#2"

(2) "6B"

I was using the instructions from the 540c Server, which didn't have the part. Either way, it didn't work for me. *sobbs*

I've downloaded ZTerm to my SE/30 but I don't know how to get a local connection with it and my //c...LOL.