Antenna Type And Placement; Figure 5: Ethernet Pinout - Belair 100SN Installation Manual

BelAir100SN Installation Guide
Antenna Type and
Placement
May 18, 2010

Figure 5: Ethernet Pinout

The internal Ethernet interface is protected against surges induced by lightning.
It is strongly recommended to use shielded category 5e wire (such as Belden®
7929 Datatuff®) to provide additional lightning protection.
Proper antenna placement, orientation and selection are critical factors in
maximizing network performance. The BelAir antennas are typically placed
between 16 feet and 32 feet (approx. 5 m and 10 m) above ground level;
although alternate installations can be used. Additionally, directional antennas
should be located with clear lines of sight to adjacent equipment in the system
and free from obstruction by buildings, foliage and passing traffic.
Note 1: If a BelAir unit uses external antennas and is mounted on a structure
that has frequent direct lightning strikes, such as cellular telephone or
water tower, then use ¼ wavelength stubs to avoid the effects of the
lightning strikes.
Note 2: If a BelAir unit uses 5 GHz omni-directional antennas, BelAir
Networks recommends that you mount it vertically up; that is, with its
base is pointing down and its top is pointing up.
In addition, antennas that are mounted with a BelAir100SN must be located at
least 18 inches (approx. 45.7 cm) from the nearest pole to avoid shadowing
effects.
Confidential
Document Number BDTK11001-A01 Preliminary
Infrastructure Requirements for the BelAir100SN
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