This object is implemented only for a VPL
which is cross-connected to other VPLs
that belong to the same VPC. All such
associated VPLs have the same value of this
object, and all their cross-connections are
identified by entries in the
atmxVpCrossConnectTable for which
atmxVpCrossConnectIndex has the same value.
The value of this object is initialized by the
agent after the associated entries in the
atmxVpCrossConnectTable have been created.