Oxidized - Not trying telnet?

I have a bunch of older Enterasys switches that Oxidized seems to support out of the box. I've been all over the web today from setting up Oxidized to debugging a few issues along the way. Somewhere, I read that Oxidized will try SSH then fall back to Telnet.

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The switches do not have or do not support SSH login and send a TCP-RST when you try and SSH. Oxidized does not try telnet, it just tries to SSH 4 times in a row then gives up.

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Is there something I have to do to get it to use Telnet, or is that supported on an individual model basis? I tried adding

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cfg :telnet, :ssh do

to the enterasys.rb file, but that didn't help matters.

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Any help appreciated!