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Directional antennas - radiation pattern side view
In Nokia Wireless Router Networks, use a directional antenna only if:
•
There are numerous obstructions in the area
•
The nearest router is a considerable distance away
•
The router is in a location where it does not need to route traffic for
other subscribers and itself requires a maximum link distance to the
neighboring router.
•
There are more than two AirHeads co-located at one site
Nokia RoofTop™ Wireless Router Installation Guide