The cisco 8540 wireless controller provides centralized control, management, and troubleshooting for high-scale deployments in service provider and large campus deployments. it offers flexibility to support multiple deployment modes in the same controller: for example, centralized mode for campus, cisco flexconnect™ mode for lean branches managed over the wan, and mesh (bridge) mode for deployments where full ethernet cabling is unavailable. as a component of the cisco unified wireless network, this controller provides real-time communications between cisco aironet® access points, the cisco prime™ infrastructure, and the cisco mobility services engine, and is interoperable with other cisco controllers.