On Earth-2, Clark Luthor was able to create the Fortress of Solitude, but his adoptive father Lionel Luthor suppressed Jor-El's essence in the Fortress using electronic equipment, as Clark Kent discovered when he was sent to Earth-2 after activating the mirror box.
Later, after the Jor-El of Earth-1 transported him to the Fortress of Earth-2, Clark Luthor approached the Fortress' Console and called out to his Kryptonian father, who welcomed his son home, revived by the effects of the Jor-El of Earth-1.
In the Comics
The Earth-Two/Golden Age version of Jor-El was named Jor-L and first appeared in Superman #53 (August, 1948). He sent his son, Kal-L, to Earth, when Krypton was destroyed.