Can you show some example code? What do you mean by 'deal with VT100'? Maybe you just need to set TERM=vt100 somewhere? You say you see nothing in the log, but do the actual commands to/from the vt100 device work?

Net::Telnet itself certainly shouldnt care what data its actually passing, although its a 7-bit protocol by default. (You can set 8-bit using the binary option, but it'll pass anything just as happily without)

C.