Essentially what I have to do is SSH2 to the jumphost. Then from there I can use telnet to get to individual devices.
Previously it was possible to get to jumphost via telnet and that is what this script was using. I'd like to figure out a way to do the SSH2 to jumphost bit then do the telnet to devices etc. The difference seems to be the way it handles 'printing' the commands I need to run.
Most examples I found do not use the $ssh2-> type of setup which is what ours was using. For example "$t->print" says it is not a valid SSH2 macro.