  A virtual Schottky group is a Kleinian group $K$ containing a Schottky group
$G$ as a finite index normal subgroup. These groups correspond to those groups
of automorphisms of closed Riemann surfaces which can be realized at the level
of their Schottky uniformizations. In this paper we provides a geometrical
structural decomposition of $K$ in the particular case when $K/G$ is an abelian
group.
