User Guide Part 1

Wi-Fi Array
ii Table of Contents
Product Specifications—XS16/XS-3900, XS12, and 
XS8/XS-3700 ........................................................................................................... 34
Product Specifications—XS4/XS-3500 ............................................................... 40
Installing the Wi-Fi Array ................................................................. 45
Installation Prerequisites ...................................................................................... 45
Optional Network Components ................................................................... 47
Client Requirements ....................................................................................... 47
Planning Your Installation .................................................................................... 48
General Deployment Considerations .......................................................... 48
Coverage and Capacity Planning ................................................................. 50
Placement .................................................................................................. 50
RF Patterns ................................................................................................ 51
Capacity and Cell Sizes ........................................................................... 52
Fine Tuning Cell Sizes ............................................................................. 53
Roaming Considerations ........................................................................ 54
Allocating Channels ................................................................................ 54
Deployment Examples ............................................................................ 57
IEEE 802.11n Deployment Considerations ................................................. 59
MIMO (Multiple-In Multiple-Out) ........................................................ 60
Multiple Data Streams—Spatial Multiplexing .................................... 62
Channel Bonding ..................................................................................... 63
Improved MAC Throughput ................................................................. 64
Short Guard Interval ............................................................................... 64
Obtaining Higher Data Rates ................................................................. 65
802.11n Capacity ...................................................................................... 66
Failover Planning ............................................................................................ 67
Port Failover Protection .......................................................................... 67
Switch Failover Protection ..................................................................... 68
Power Planning ............................................................................................... 69
AC Power .................................................................................................. 69
Power over Gigabit Ethernet ................................................................. 69
Security Planning ............................................................................................ 70
Wireless Encryption ................................................................................ 70
Authentication ......................................................................................... 70
Meeting PCI DSS Standards ................................................................... 71
Meeting FIPS Standards ......................................................................... 71