Virtualization & data center consolidation have imposed higher bandwidth demands on data center networks. The competitive business landscape has also pushed forward the need for faster application deployments. Next-generation data centers need to provide the efficiency, flexibility & availability to facilitate business agility & competitiveness. The Zy XEL XS3900-48F is a high-density top-of-rack (To R) switch designed to facilitate fast & modularized application deployments in next-generation data centers. It supports DCBX, 802.1 Qaz (ETS) & 802.1 Qbb (PFC) protocols, & offers 10 Gb E & 40 Gb E connectivity to provide high bandwidth & ultra-low latency performance for converged networks & virtualized applications. With redundant & hot-swappable fan trays & power supply modules, the XS3900-48F offers the redundancy, reliability & availability for non-stop services.