Installation Guide

PMP 450i and PTP 450i Configuration and User
Compliance with radio regulations
Notwithstanding that Cambium has designed (and qualified) the PMP 450i products to
generally meet the Class B requirement to minimize the potential for interference, the
PMP 450i product range is not marketed for use in a residential environment.
DFS for 5 GHz Radios
Dynamic Frequency Selection (DFS) is a requirement in several countries and regions for 5 GHz
unlicensed systems to detect radar systems and avoid co-channel operation. DFS and other
regulatory requirements drive the settings for the following parameters, as discussed in this
section:
• Country Code
• Primary Frequency
• Alternate 1 and Alternate 2 Frequencies
• External Antenna Gain
On the AP, the Home => DFS Status page shows current DFS status of all three frequencies
and a DFS log of past DFS events.
Figure 1 AP DFS Status
Background and Operation
The modules use region-specific DFS based on the Country Code selected on the module’s
Configuration, General page. By directing installers and technicians to set the Country Code
correctly, the operator gains confidence the module is operating according to national or regional
regulations without having to deal with the details for each region.
The details of DFS operation for each Country Code, including whether DFS is active on the AP,
SM, and which DFS regulations apply is shown in Table 6 on page 9.
8 pmp-0957 (April 2015)