Avaya WLAN Series, Руководство по установке, Страница: 19 / 110

Preparing for Installation
Overview of the Outdoor Installation
Avaya Outdoor Antenna Installation Guide 2-9
Overview of the Outdoor Installation
The outdoor installation of the link (point-to-point or point-to-multipoint) will
consist of the following components:
■ The Avaya Inc. Antenna
■
The Avaya Inc. proprietary low-loss antenna cable (available in different
cable lengths).
■
Antenna Mast/Wall Bracket for the antenna.
■
An adequate “Grounding System” that meets the requirements described in
“Grounding System” on page 2-13.
NOTE:
All outdoor cable connectors must be sealed with the enclosed weather-
proofing stretch tape to permanently waterproof the coax connectors.
!
DANGER:
For your own safety, the antenna mast and the grounding system
should be installed only by experienced installation professionals who
are familiar with local building and safety codes and/or the national
electrical codes.
Carefully read the instructions as described for the “Grounding System”
on page 2-13 and verify that your installation complies with the
appropriate regulations and codes before installing the antenna.
Antenna Placement
To achieve maximum performance for your wireless outdoor connection, the
Avaya Wireless Outdoor Antenna must have clear line-of-sight. Line-of-sight can
be defined as:
■
No obstacles in the direct path between the two antennas.
■
No obstacles within a defined zone around the antenna beam.
You need to be aware that the shape of a radio beam is not straight and narrow
like a laser beam. The radio beam, also referred to as Fresnel Zone
1
, is rather
“bulged” in the middle, like for example a “rugby ball”. The exact shape and
width of the Fresnel Zone is determined by the path length and frequency of the
radio signal.
1 Pronounced as “Fray-Nell”