The Cisco Network Convergence System 4000 (NCS 4000) series is a converged optical service platform providing dense wavelength-division multiplexing (DWDM), Optical Transport Network (OTN), Multiprotocol Label Switching Transport Profile (MPLS-TP), Carrier Ethernet, and label switch router or IP multiservice capabilities. It delivers massive scale through an advanced silicon and system design, while offering dramatic network efficiency and simplification led by high usability, automation, service management, turn-up, and monitoring.