Telnet in a ZEN page

I need to find a solution for a client that has ZEN based application.  Certain parts of this application remained Terminal based for which a unsigned Java applet was used to embedded this within the application.  The control is old and requires an old version of Java which IT folks are not happy about.  

I am looking for a replacement that will allow a terminal, either telnet or directly use cTerm, window to be embedded within a web application, specifically ZEN, based on Cache.  Any suggestions or success stories would be welcome.