Cyber-Control consisted of several pieces of equipment which John Lumic used to coordinate his takeover of Earth. The main control centre was adjacent to a large part of the power station used for upgrading. Cyber-Control was also adjacent, via a large metal door with the Cybus Industries logo on it, to another room which seemed to be used solely to create the Cyber-Controller.
Cyber-Control was destroyed when the Tenth Doctor and Mickey Smith transmitted the cancellation code for the Cybermen's emotional inhibitor chips. The Cybermen, realising what they were, exploded, taking the power station with them. (TV: The Age of Steel)