How do you silence speakup on a laptop?

[Sean McMahon]

According to the speakup help it looks like the laptop command for speakup
keypad enter is control+enter.  However, this only causes speakup to catch up to
the current screen.  I want to have it like on my desktop where it's silent
until I issue another speakup reading command or type another command to
execute.   This is speakup 2.00 cvs from Apr 14.
Sean