User Guide

PMP 450 Planning Guide
Encryption ................................................................................................................................................ 1-48
Further reading on wireless operation ........................................................................................................ 1-48
System management ........................................................................................................................................ 1-49
Management agent .................................................................................................................................... 1-49
Web server ................................................................................................................................................ 1-49
Remote Authentication Dial In User Service (RADIUS) ............................................................................ 1-52
SNMP ....................................................................................................................................................... 1-52
Network Time Protocol (NTP) .................................................................................................................. 1-53
Wireless Manager (WM) ............................................................................................................................ 1-53
Capacity upgrades ..................................................................................................................................... 1-54
Software upgrade ...................................................................................................................................... 1-54
Further reading on system management .................................................................................................... 1-55
Chapter 1: Planning considerations ......................................................................... 1-56
Regulatory planning ........................................................................................................................................ 1-57
Obeying Regulatory limits ......................................................................................................................... 1-57
Conforming to the limits ............................................................................................................................ 1-57
Network migration planning ............................................................................................................................ 1-58
Example PMP 450 deployment scenario .................................................................................................... 1-58
Sector capacity .......................................................................................................................................... 1-60
Site planning .................................................................................................................................................... 1-67
AP or SM site selection .............................................................................................................................. 1-67
Power supply site selection ........................................................................................................................ 1-67
Maximum cable lengths ............................................................................................................................. 1-67
Wind loading............................................................................................................................................. 1-68
Link planning .................................................................................................................................................. 1-71
Range and obstacles .................................................................................................................................. 1-71
Path loss considerations............................................................................................................................. 1-93
Calculating maximum power level for connectorized AP units .................................................................... 1-93
Understanding Attenuation ....................................................................................................................... 1-94
Calculating Link Loss ................................................................................................................................ 1-94
Calculating Rx Signal Level ...................................................................................................................... 1-94
Calculating Fade Margin ........................................................................................................................... 1-95
Analyzing the RF Environment ....................................................................................................................... 1-95
Mapping RF Neighbor Frequencies ........................................................................................................... 1-95
Analyzing the spectrum ............................................................................................................................. 1-96
Anticipating Reflection of Radio Waves .................................................................................................... 1-97
Noting Possible Obstructions in the Fresnel Zone ....................................................................................... 1-97
Multiple OFDM Access Point Clusters ....................................................................................................... 1-98
Planning for co-location and using the OFDM Frame Calculator Tool ...................................................... 1-100
Selecting Sites for Network Elements .............................................................................................................. 1-103
Surveying Sites ....................................................................................................................................... 1-104
Clearing the Radio Horizon ..................................................................................................................... 1-104
Calculating the Aim Angles ..................................................................................................................... 1-105
pmp-0047 (March 2014)
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