Nokia RoofTop R242 Installation Manual
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Contents
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6 Nokia RoofTop™ Wireless Routing Installation Guide2.2 Site AnalysisThe goals of site analysis are:• To determine the feasibility of RF links at each site• To determine the antenna and cable requirements necessary toprovide service2.2.1 RF Link FeasibilityWireless routers operate in a “mesh” network—line of sight is required toonly one other radio in the network. The IP routing capability allows allunits to act as repeaters for other units.Survey all obstructions to potential sites. For most installations use anomnidirectional antenna. This assures maximum connectivity and allowsthe unit to forward packets for existing and future needs.NOTE: To maintain broadband data rates, it is recommended thatnetworks be kept within three hops.2.2.1.1 Site Survey Steps1. Determine if there are Line of Sight (LOS) paths for each proposedlink. Line of sight exists if there are no obstructions (for example,trees, buildings, etc.) between the antennas. For best results, thereshould be no obstructions between the two antennas. For longdistance paths there should be no obstacles close to the RF path.2. Determine the antenna location and maximum possible antennaheight. The height of the antenna is often dependent on the physicallimitations of the site. For example, an antenna mast can be placed ona rooftop, an antenna can be installed on an existing structure ortower, or the mast and antenna can be installed on the ground. |
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