The Altitude 4521 is an independent, cost-effective access point. As a single radio independent AP, the Altitude 4521 can be used as a standalone AP or with a wireless controller, this AP also can become a virtual controller and control up to 24 additional Altitude 4521 access points. This access point is targeted at enterprise and campus deployments that are looking to lower the cost of deploying and operating a secure, reliable 802.11n Wireless LAN (WLAN) but are also looking for a more robust solution than a pure dependent AP approach. The Altitude 4521 can continue to provide service if a connection to the controller is lost, for example by a cable cut or power failure. The Altitude 4521 is equipped with a 2 x 2 MIMO 802.11 a/b/g/n (2.4 and 5 GHz) band unlocked radio with a combined output power of a maximum 27 dBm. The 4521 supports local bridging and has a single Gigabit Ethernet uplink port. The device has a small form factor. The Altitude 4521 can be powered via the Gigabit Ethernet uplink port with standard 802.3af PoE.
The AP includes a Layer 2-7 stateful packet filtering firewall. AAA RADIUS client services, built in wireless IPS, VPN gateway, and location based access control are also included.
The Altitude 4521 supports wireless controller auto discovery. Upon activation it communicates with the controller and automatically downloads configuration parameter and firmware. This reduces installation, maintenance and troubleshooting costs for Layer 2 and Layer 3 deployments.
The Altitude 4521 uses SMART RF to adjust power and channel selection to prevent channel overlap or co-channel interference. This is done automatically reduces the chance of human error or interference. SMART RF is a standard feature on the Altitude 4521.
The Altitude 4521 allows for direct forwarding of data tragic. That mean no bottleneck at the wireless controller, which reduces latency and jitter issues for voice an video applications.
Virtual controller functionality
The Altitude 4521 has the capability to act as a virtual controller AP, allowing a single Altitude 4521 to control up to 24 other of the same type of AP.