Xirrus Wi-Fi Array XR4420 User Manual

Wi-Fi Array
72 Installing the Wi-Fi Array
IEEE 802.11n Deployment Considerations
The Xirrus XR and XN Arrays support IEEE 802.11n on all IAPs, in both 2.4 GHz
and 5 GHz bands. Use of 802.11n offers significant benefits:
 Higher data rates
 Higher throughput
 Supports more users
 More robust connections
 Increased coverage area
 More secure connections — supports WPA2 (Wi-Fi Protected Access 2)
These benefits result in better support for a wide range of applications such as
voice and video, intensive usage such as CAD/CAM and backups, dense user
environments, and for manufacturing and warehousing environments.
The techniques that 802.11n uses to realize these performance improvements, and
the results that can be expected are discussed in:
 “MIMO (Multiple-In Multiple-Out)” on page 73
 “Multiple Data Streams — Spatial Multiplexing” on page 75
 “Channel Bonding” on page 76
 “Improved MAC Throughput” on page 77
 “Short Guard Interval” on page 77
 “Obtaining Higher Data Rates” on page 78
 “802.11n Capacity” on page 79

IEEE 802.11n features are supported only on XR and XN Array models, and
this section applies only to those Arrays. Note that the license installed on
the Array must include support for 802.11n. Please see “About Licensing
and Upgrades” on page 325.

While 802.11n increases coverage area by almost doubling the reach, you
must consider the legacy wireless devices in your network. Wireless stations
connecting using 802.11a/b/g will still be subject to a reach of up to 100 feet,
depending on the environment.

Xirrus Wi-Fi Array XR4420 Specifications

General

Brand	Xirrus
Model	Wi-Fi Array XR4420
Category	Speaker System
Language	English