Switch console in xterm

[ktb]

Somewhere I heard there exists a program that will allow you to switch
"consoles" in an xterm.  In other words it would be like switching
consoles with ctrl+alt+F* but from within a single xterm window.  I
poked around in the packages at the Debian site but can't find
anything.  I don't even know what to call it.  Makes it a little hard to
search for:)  Let me know if you've heard of such a thing.
Thanks,
kent