Cisco 4400 Series Wireless LAN Controllers
Cisco Wireless LAN Controllers are responsible for system wide wireless LAN functions, such 
as security policies, intrusion prevention, RF management, quality of service (QoS), and mobility. They work in conjunction with Cisco Access Points and the Cisco Wireless Control System (WCS) to support business-critical wireless applications. From voice and data services to location tracking, Cisco Wireless LAN Controllers provide the control, scalability, security, and reliability that network managers need to build secure, enterprise-scale wireless networks-from branch offices to main campuses.
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Cisco 2100 Series Wireless LAN Controllers 
The Cisco Wireless LAN Controllers work in conjunction with Cisco Aironet access points and the Cisco Wireless Control System (WCS) to provide systemwide wireless LAN functions. As a component of the Cisco Unified Wireless Network, the Cisco 2100 Series Wireless LAN Controllers enables administrators to securely manage WLANs and mobility services, such as enhanced security, voice, guest access, and location services.
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Motorola RFS4000 802.11n Integrated Services Controller
The RFS4000 802.11n Integrated Services Controller is designed to provide any branch office or remote facility with high performance, comprehensive, cost-effective and secure wireless and wired networking services. No matter what the networking needs are in your branch offices, the RFS4000 delivers rich
voice support including Voice over WLAN (VoWLAN) now, Fixed Mobile Convergence (FMC) and IP PBX in the future; rich video support including video conferencing and video surveillance; multiple locationing technologies such as Wi-Fi and RFID; plus support for multiple RF technologies, including future technologies such as Wi-MAX. The RFS4000 is the only product in its class that offers dual band access concurrent with Mesh services as well as gap free security with 24x7 Wireless Intrusion Protection System (IPS).
