Well, commonly ssh is only installed on *nix computers, but you can install it on windows, too.
I have Alien Wrath running on a root server with linux as OS and ssh running to login.
I start the dedicated tremulous server like this:
chojin@amoebia:~> ssh tremulous@ipxserver.dyndns.org
tremulous@ipx:~$ screen
tremulous@ipx:~$ ./tremded.x86 +set dedicated 2 +exec server.cfg
Then I see the server log and can type commands in the so-called console. Screen is a special program, that keeps programs running in somekind of virtual background, even if you log out of the server. To leave the screen I have to press a key combination (ctrl+a d). The screen will continue running with the tremulous server in it.
So next time to get to console of tremulous I do this:
chojin@amoebia:~> ssh tremulous@ipxserver.dyndns.org
tremulous@ipx:~$ screen -r
That's the command to resume a screen session. You will then find yourself back in the tremulous console and you can see what happened while you were gone.
Hope this answers questions about ssh and how to use it productively with the program screen.