Ok man, you're probably my favorite poster here, but that is an asinine post. The defense as a whole is called because the secondary and the front seven (or front 3 / LB 4) have to be in sync.
The defense runs a package. The package has to support each others faults. (defensive backs press when blitzing due to coverage deficiencies to give rushers more time to get the to QB)
Wade calls what package is ran. Campo doesn't call ****. He just talks to the players to make sure they are on the same page.
Brian Steward got fired because he was clueless on how to call defensive packages based on the situation.