To help service providers scale their networks, lower costs for packet transport, and support value-added services, Cisco ® offers the next-generation, four-port OC-48 POS line card. Based on the Enhanced Services 10 Gbps forwarding engine, this card provides OC-48 density, a rich feature set, and line-rate performance for all Cisco 12400 Internet Routers. Performance with features makes the ES-based cards the industry leader in 10 Gbps line cards.