sentences:  T-MPLS is currently being standardized only at ITU-T and enjoys strong vendor support but little carrier support.As a native MPLS derivative, T-MPLS can be easily implemented over existing MPLS routers.However, T-MPLS has been stripped of the characteristics which originally made it attractive to carriers—control-plane automation, signaling, and QoS—and therefore has yet to prove its benefits for the transport network.