Soft PVC target address if this is the calling side
Soft PVC source address if this is called side.
Atomically set ConnState, RemoteAddr, RemoteVpi
and RemoteVci will create or delete a soft PVC.
Atomically set ConnState, RemoteAddr without RemoteVpi,
Remote Vci will also create or delete a soft PVC but let
target switch assign the vpi and vci.