The Rohloff Twist-shifter works with two shift cables. When the twist shifter is rotated forward (direction gear #14), than the rear shift cable 14 is pulled.
When the Twist-shifter is rotated backward (direction gear #1), than the front shift cable 1 is pulled. The indexing of the shifting lies not in the Twist-shifter as with common designs, but inside the hub. There is no wear on the indexing system nor need to adjust it.