The PW label used in the inbound direction (i.e. packets received from the PSN). It may be set manually if pwOwner is 'manual',otherwise setting done automatically. For MPLS, MPLS over IP or MPLS over GRE PSN, it represents the 20 bits of PW tag, for L2TP it represents the 32 bits Session ID and for IP PSN it represents the source UDP port number. If the label is not yet known (signaling in process), the object SHOULD return a value of 0xFFFFFFFF. For manual configuration, this object MAY be changed only if the PW is not active.