Jack in

The action of Jacking-in is when a net operator sends his or her Net Navi into the cyber world. In MegaMan Battle Networks 1, 2, and 3, the PET contained a wire that plugged into the jack of an electrical unit. From Megaman Battle Network 4 on, all Navis jacked in by wireless transport. To jack-in with MegaMan in the games, Lan would have to be standing considerable close to the jack-in port.

When a navi is in the cyber world, their operators can disconnect without jacking them out but they cannot send battle chips to their navi without connection.