Is there any command I could type at the console to bring up an alternate or
emergency console screen?

I ask as it happens sometimes at a remote site that the system console
prompt is unavailable due to a module not unloading or giving the prompt
back, and if you don't have somebody on site to do CTRL-ALT-ESC for you, or
if there's a problem with NRM and you can't call it up that way, then
there's nothing you can do in RCONJ to execute further commands.

Ideally I'd like to add this command to my AUTOEXEC.NCF file so I always
have an emergency console to switch to.

Thanks in advance