The Intel NetStructure. IXB28504xGbEFS is a high-performance secure packet processing blade in the AdvancedTCA* form factor. It features the Intel. IXP2850, a 1.4 GHz network processor with built-in support for IPsec encryption algorithms. The IXB28504xGbEFS is ideal for telecommunications-grade applications requiring secure multi-gigabit data rates in IP Multimedia Subsystem (IMS), wireless, and other edge/access environments.