Engineering Control
According to the  for , Engineering Control was technical support for Federation starships in the late 23rd century. This control was located on Earth. Communication betweenn a starship and the control was coordinated by Starfleet Command. 

During the Whale Probe crisis of 2286, Captain Joel Randolph of the  requested that Starfleet Command patch him up with the technicians at Engineering Control. He was hoping that, with their help, that they could resolve the power issues aboard his ship.
Unused production material