Edgecore Cell Site Gateway CSR440 (formerly known as AS7535-28XB) is an open disaggregated cell site gateway platform that provides a combination of 1/10/25Gbps, 50/100Gbps, and 100/400Gbps interfaces, utilizing a powerful Qumran family merchant silicon and an Intel Xeon x86 processor with hyper-threading technology providing optimized performance for service provider access and aggregation networks. CSR440 is a temperature hardened design product, able to operate at a wide operational temperature range from -40?C to 65?C, and with redundant/hot swappable power modules and 5+1 high efficient modular fans that provide high availability and hassle-free maintenance for mission critical applications, making the hardware an ideal choice for current LTE and emerging 5G mobile xhaul network solutions. CSR440 is pre-installed with ONIE (Open Network Install Environment) to provide freedom of choice and flexibility for preferred NOS (Network Operating System) integrated with user applications.