Nokia RoofTop R240, Installation Manual

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8 Nokia RoofTop™ Wireless Router Installation Guide
3.2 Determining the RF links to other sites
The feasibility of an RF link can be estimated based on:
• Distances between potential sites
• Line of sight for RF paths
• Antenna RF gains
• Cable and connector losses
If the site has good links to other sites, it can be used as a forwarding
system for other wireless routers in the network. If the router can link to
one other router, it will be able to access the internet, but it will be unable
to forward signals to other wireless routers. If it can link to more than one
router, it can share many more signals in many directions. Nokia
recommends that each router has three hops or less to the AirHead.
Determine the RF path between the antenna at the site and the antennas at
other, adjacent sites. For a directional link with a single antenna, there is
only one RF path. For an omnidirectional antenna, determine all RF
paths. The RF path can be determined by knowing the relative bearing
from the current site to adjacent sites.