is there a list of commands I can use, and what their purpose is?
Take a look at the Digi Transport User Guide and search for CLI
http://ftp1.digi.com/support/documentation/90001019_L.pdf
Is this document still on the FTP site?
hi this is the current
https://www.digi.com/resources/documentation/Digidocs/pdfs/90001019.pdf