First, you have to add your node to the nodegroup "umts" [1]. In this
way the host environment of the node will get the tools needed to
manage the 3G umts/hsdpa interface. Then, you have to add the vsys
-attribute to the sliver you want to grant the access to the umts/hsdpa
+attribute to the slivers you want to grant the access to the umts/hsdpa
interface. The value of this attribute ("vsys") has to be set to
"umts_backend"