The Cisco Network Convergence System 5500 Series offers industry-leading density of routed 100 Gigabit Ethernet (100GE) ports for high-scale WAN aggregation. It is designed to efficiently scale between data centers and large enterprise, web, and service provider WAN and aggregation networks. The Cisco NCS 5504 supports up to four line cards, six switch fabric cards, two route processors, two system controllers, three fan trays, and four power supplies.