The Cisco 7600 Series Ethernet Services Plus 40-Gbps (ES+40) line cards use an extensible design that allows service prioritization for voice, video, data, and wireless mobility services. Service providers and enterprises can benefit from the improved economics, density, advanced Carrier Ethernet features, and high performance of the ES+40 fixed-configuration line cards. With the same architecture and features, the Cisco 7600 Series Ethernet Services Plus 20-Gbps (ES+20) line cards are designed for networks with lower interface density requirements. In the following sections, the ES+40 and ES+20 line cards are referred to as the ES Plus cards.