I believe the switcher is for controlling an OpenSSH server running on the N900, where as you seem to be using only the OpenSSH client, to access remote servers. The idea for the switcher would be that you might not want the SSH server running all the time on your N900 (possible security weakness for bruteforce, might eat up battery during the bruteforce attack), so you have an easy way to start and stop it. hope this helps.