Wi-Fi Array
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Xirrus Advanced RF Performance Manager (RPM) .................................. 21
Xirrus Advanced RF Security Manager (RSM) .......................................... 22
Xirrus Advanced RF Analysis Manager (RAM) ......................................... 22
Product Specifications — XR4400 and XR4800 Series ........................................ 23
Product Specifications — XN16, XN12, and XN8 ............................................... 31
Product Specifications — XN4 .............................................................................. 38
Product Specifications — XS16 and XS8 .............................................................. 45
Product Specifications — XS4 ............................................................................... 51
Installing the Wi-Fi Array ................................................................. 57
Installation Prerequisites ...................................................................................... 57
Optional Network Components ................................................................... 59
Client Requirements ....................................................................................... 59
Planning Your Installation .................................................................................... 60
General Deployment Considerations .......................................................... 60
Coverage and Capacity Planning ................................................................. 62
Placement .................................................................................................. 62
RF Patterns ................................................................................................ 63
Capacity and Cell Sizes ........................................................................... 65
Fine Tuning Cell Sizes ............................................................................. 66
Roaming Considerations ........................................................................ 67
Allocating Channels ................................................................................ 67
Deployment Examples ............................................................................ 70
IEEE 802.11n Deployment Considerations ................................................. 72
MIMO (Multiple-In Multiple-Out) ........................................................ 73
Multiple Data Streams — Spatial Multiplexing ................................... 75
Channel Bonding ..................................................................................... 76
Improved MAC Throughput ................................................................. 77
Short Guard Interval ............................................................................... 77
Obtaining Higher Data Rates ................................................................. 78
802.11n Capacity ...................................................................................... 79
Failover Planning ............................................................................................ 80
Port Failover Protection .......................................................................... 80
Switch Failover Protection ..................................................................... 81
Power Planning ............................................................................................... 82
AC Power .................................................................................................. 82
Power over Gigabit Ethernet ................................................................. 82
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