He has triple- and quadruple-checked the code and the installation and in his mind everything lines up perfectly, but Tony knows that not everything that works in the spheres of his mind also works in reality.
For a moment he stares at the command-code, then takes a deep breath and hits the final key.
He knows the installation will take time, time he could use for something else; instead he remains in his seat and just watches. Finally it's done.
"Hello? Are you there?" Tony asks, feeling slightly silly.
"Good morning, sir. Is there anything I can do for you?"