The invention relates to an electric interface, in particular an interposer, having a first connection plane with at least one first contact surface pair, each of which has a first and second contact surface, and a second connection plane with at least one second contact surface pair, each of which has a third and a fourth contact surface. For each of a first and second contact surface pair, a first electric connection electrically connects the first contact surface of the first connection plane to the third contact surface of the second connection plane, and a second electric connection electrically connects the second contact surface of the first connection plane to the fourth contact surface of the second connection plane. The first electric connection between the first and third contact surface has a specified first geometric length, and the second electric connection between the second and fourth contact surface has a specified second geometric length, the first and second geometric length being different.